News Room : amplifiers and linear

Texas Instruments dramatically reduces system cost in consumer audio

NewsCenter — Mon, 24 Aug 2009 13:00:00 GMT

New Class-D amplifiers feature true filter-free operation and SpeakerGuard™ protection circuitry

PRNewswire

DALLAS

(NYSE:TXN)

DALLAS, Aug. 24 /PRNewswire/ -- Texas Instruments Incorporated (TI) (NYSE: TXN) today introduced a 15-W stereo, true filter-free, analog-input, Class-D audio amplifier. The device's advanced electromagnetic interference (EMI) suppression technology eliminates the need for costly inductor-based output filters, reducing bill of materials (BOM) cost by as much as 50 percent. The TPA3110D2's SpeakerGuard protection circuitry protects speakers from damage, helping to reduce end equipment customer returns and associated support costs. The device also features enhanced performance, making the TPA3110D2 an excellent choice for consumer audio applications, including HDTVs, media docking stations, digital radios and sound bars. For product details and to order evaluation modules and samples see: www.ti.com/tpa3110d2-pr

Find out more about the TPA3110D2 and TI's home audio portfolio

TPA3110D2 video: www.ti.com/tpa3110d2-pr
TI's complete audio portfolio: www.ti.com/audio-pr
Ask questions and share knowledge on TI's E2E online community: http://www.ti.com/e2e-pr

Key features and benefits of the TPA3110D2

Filter-free advanced EMI suppression technology reduces bill of materials costs by as much as 50 percent, yet meets EMC performance specifications. Costly inductor-based output filters are replaced with low-cost ferrite bead filters, reducing board space
SpeakerGuard technology includes an adjustable power limiter and DC protection circuitry on the audio inputs, preventing speakers from being overdriven or damaged by DC currents due to board component failure or defects on the audio input circuitry
Ultra-low THD+N performance of < 0.1% THD+N over full power range at 1 kHz and advanced click-and-pop suppression circuitry enables outstanding audio performance and fidelity
Flow-through pin-out facilitates hassle-free layout and optimizes thermal performance with high-voltage pins on one side and input and control pins on the other
Differential inputs enables excellent common mode noise rejection and high-fidelity audio

Availability and pricing

The TPA3110D2 is available now in a 28-pin TSSOP package and is priced at $1.45 in quantities of 1,000. Additional members of the TPA311xDx family support multiple configurations to maximize design flexibility. The TPA3111D1 and TPA3112D1 are 10-W and 25-W mono amplifiers priced at $0.90 and $1.15 respectively. The TPA3113D2 is a 6-W stereo amplifier and is priced at $0.85. The TPA3111D1, TPA3112D1 and TPA3113D2 will be available in late 3Q 2009.

About Texas Instruments

Texas Instruments (NYSE: TXN) helps customers solve problems and develop new electronics that make the world smarter, healthier, safer, greener and more fun. A global semiconductor company, TI innovates through manufacturing, design and sales operations in more than 30 countries. For more information, go to www.ti.com.

Trademarks

SpeakerGuard™ is a trademark of Texas Instruments. All registered trademarks and other trademarks belong to their respective owners.

SOURCE Texas Instruments Incorporated

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SOURCE: Texas Instruments Incorporated

Web site: http://www.ti.com/

Audio converters and 2-VRMS line drivers enable crystal-clear sound

NewsCenter — Wed, 04 Feb 2009 08:00:00 GMT

Advanced under voltage monitor enables more energy-efficient designs

DALLAS (Feb. 4, 2009) - Texas Instruments Incorporated (TI) (NYSE: TXN) today extended its audio portfolio with a high-performance, multi-channel Codec, three digital-to-analog converters (DACs) and two pop-free 2-VRMS DirectPath&#8482 line drivers. Energy-efficient designs require systems to shut down and start up more frequently, often creating clicks and pops, which degrade the listening experience. To address these concerns, the DRV603 line driver integrates under voltage protection (UVP) to monitor the supply rail and mute outputs before the rest of the system loses power. Regardless of how the system powers up or browns out, the feature ensures that any pops, clicks or noise created in the rest of the signal chain will be muted, so the user experiences crystal-clear audio. For more information on this product, please see www.ti.com/drv603-pr.

Key features of the DRV602 and DRV603

2-VRMS output even with 3.3-V power supply
Differential inputs
Ground reference outputs
Variable input gain
106.5 dB SNR (DRV602) and >109 dB SNR (DRV603)

Key benefits

Reduces component count and cost
Simplifies design with direct connection to high performance DACs and set-top box systems-on-chip
Eliminates blocking caps to minimize pop/click, reduce system cost and extend low-frequency response
Maximizes design flexibility by allowing connection to DACs of any voltage
Enables superior audio performance without signal degradation and meets requirements for HD products like Blue-ray DVD players

Availability, packaging and pricing

The multi-channel Codecs, DACs and line drivers are available today. Suggested resale pricing in 1000-piece quantities and additional details are listed below.

Part Number	Channels	SNR (dB)	I/O	Price	Samples, EVMs
PCM3168A	6 channels in, 8 out	107dB and 113dB	Differential I/O	$4.60	www.ti.com/pcm3168
PCM1690	8 channels	113dB	Differential outputs	$2.60	www.ti.com/1690
PCM1691	8 channels	111dB	Single-ended outputs	$2.50	www.ti.com/1691
PCM1789	2 Channels	113dB	Differential outputs	$1.90	www.ti.com/pcm1789
DRV602	2 channels	102 dB	Differential input, single-ended output	$0.75	www.ti.com/drv602
DRV603	2 channels	>109 dB	Differential input, single-ended output	$0.85	www.ti.com/drv603

Lowest power differential ADC drivers enable highest accuracy conversion

NewsCenter — Mon, 02 Feb 2009 08:00:00 GMT

New amplifiers for power-sensitive systems consume half the quiescent current of competition

DALLAS (Feb. 2, 2009) - A new fully differential amplifier family from Texas Instruments Incorporated (TI) (NYSE: TXN) drives the highest accuracy data conversion across single- and multi-channel successive approximation register (SAR) and delta-sigma analog-to-digital converters (ADCs) in a wide range of applications, including industrial, medical and audio. The THS4521, THS4522 and THS4524 provide the industry's best performance to power ratio, making the devices well-suited for applications requiring high resolution and precision with superior dynamic range, such as pressure and flow meters, seismic equipment and electrocardiogram machines, as well as battery-operated devices and other applications with sensitive power budgets. For details about this product, please see www.ti.com/corp/docs/landing/adc-drivers/index.htm.

"Previously, customers seeking a buffer for differential precision ADCs could choose between a single-ended amplifier solution requiring complex interface circuits or a higher power fully differential amplifier," said Art George, senior vice president of TI's High-Performance Analog business unit. "The THS452x provides an alternative that reduces the number of amplifiers to save board space and alleviates amplifier and circuit matching concerns while minimizing power consumption."

Key features and benefits

Consumes half the quiescent current (1.14 mA/channel) and 22x less power down current (20 uA) compared to competition
Increases bandwidth by greater than 30 percent, providing 145-MHz and 490-V/us slew rate to buffer and amplify signals without increasing system power consumption
Improves dynamic range/sensitivity by 44 percent with an input voltage noise of only 4.6nV/rtHz to minimize distortion
Provides a high-performance buffer for TI's SAR and delta-sigma ADCs for high-accuracy and low-power systems
Output common mode control allows for easy DC coupling, while negative rail input and rail-to-rail output capability simplifies design and shortens development time
Offers power supply flexibility by accepting single supply of +3 V to +5 V or dual supply of +/-1.5 V to +/- 2.5 V
Reduces board space with single-, dual- and quad- configuration options

Driving SAR and delta-sigma converters for high accuracy up to 24 bits

The THS452x devices enable customers to drive differential ADCs, including TI's ADS8317 16-bit, 250-kSPS SAR converter and ADS1278 24-bit, 128-kSPS delta-sigma converter, and achieve specified data sheet performance levels. For instance, using the THS4521 to buffer the ADS1278, at 10-kHz input achieves 102-dB signal-to-noise ratio (SNR) and 110-dBc spurious free dynamic range (SFDR) with very low quiescent current, which reduces system power consumption.

Availability, pricing and support

All members of the THS452x family are available today. Pricing and packaging are included below.

Part #	Channels	Package	Price
THS4521	Single	MSOP, SOIC	$1.10
THS4522	Dual	TSSOP	$1.85
THS4524	Quad	TSSOP	$3.15

Find out more about THS452x and TI's amplifier and data converter portfolio by visiting the links below:

Samples and EVMs: www.ti.com/adcdrivers
Amplifier and Data Converter Selection Guide: www.ti.com/amplifier
ADS8317 16-bit, 250-kSPS, MicroPower sampling ADC: www.ti.com/ads8317
ADS1278 octal, 24-bit, 128-kSPS, simultaneous sampling delta-sigma ADC: www.ti.com/ads1278

TI introduces single-supply, auto-zero sensor amplifier with programmable gain and offset

NewsCenter — Fri, 21 Nov 2008 07:00:00 GMT

Device used as building block for bridge sensors and data acquisition

DALLAS (November 21, 2008) - Texas Instruments Incorporated (TI) (NYSE: TXN) today introduced a single-supply, auto-zero bridge sensor amplifier. Featuring programmable gain and offset, the PGA308 amplifies the sensor signal and provides digital calibration for zero (offset) and span (gain). A One-Wire, UART-compatible digital serial interface performs the calibration. The PGA308 is used as a building block for resistive bridge sensor conditioning and general data acquisition applications. (See www.ti.com/pga308-pr.)

At the heart of the PGA308 is a precision, low-drift and low-noise front-end programmable gain amplifier (PGA). Digital-programmable coarse offset, fine offset and selected gain (coarse and fine) may be controlled in real time or permanently programmed into the PGA308. The device can store seven banks of one-time programmable (OTP) memory of gain and offset calibration parameters. A separate power-on reset (POR) OTP bank can be programmed up to four times.

The fault monitor detects overload, burnout and system faults. The over-/under-scale limits offer additional system-level diagnostics.

Using auto-zero techniques, the device achieves excellent precision and noise over the extended industrial temperature range of -40C to +125C and has an operating voltage of +2.7 V to +5.5 V. Other digitally calibrated sensor signal conditioning ICs from TI include PGA309, a voltage output programmable sensor conditioner with temperature compensation, and XTR108, a 4-20 mA, two-wire transmitter, or voltage output programmable RTD signal conditioner.

Availability, packaging and pricing

The PGA308 is available now from TI and its authorized distributors in a MSOP-10 package and a 3 mm x 4 mm DFN-10 package. The device is priced at $1.85 each in 1,000-piece quantities (suggested resale price). A hardware and software PGA308EVM evaluation tool is available for calibration and configuration.

TI introduces zero-drift programmable gain amplifiers with MUX for microprocessor-based applications

NewsCenter — Thu, 30 Oct 2008 07:00:00 GMT

Devices target power sensitive applications and mixed voltage systems

DALLAS (October 30, 2008) - Texas Instruments Incorporated (TI) (NYSE: TXN) today introduced the PGA11x family of zero-drift programmable gain amplifiers (PGA) with single-ended input, single-supply operation, rail-to-rail I/O and multi-channel multiplexers (MUX). The PGA112, PGA113, PGA116 and PGA117 provide a flexible, highly integrated programmable gain amplification solution for microprocessor-based applications such as portable data acquisition, remote meter reading, automatic gain control, programmable logic controllers and handheld test equipment. (See www.ti.com/pga112-pr.)

The PGA112 and PGA116 offer binary gains of 1, 2, 4, 8, 16, 64, and 128 while the PGA113 and PGA117 have scope gains of 1, 2, 5, 10, 20, 50, 100 and 200. Programmable gains allow for optimum matching of the sensor output to an analog-to-digital converter (ADC) input voltage range. In addition to eliminating the need for matched discrete components, the PGA11x family includes the added benefits of multi-channel MUXs, calibration and digitally controlled gain. The PGA112 and PGA113 have a two-channel MUX, and the PGA116 and PGA117 have a ten-channel MUX. The op amp output stage can be powered by the same power supply as the ADC, which is useful in multi-supply systems to prevent an over-voltage/lockup condition on an ADC input.

The PGA11x family provides internal calibration channels for system-level calibration. Gain switching time is 200 ns and gain settling is 2.55 us at 0.01 percent. For all of the devices, DC gain error is 0.1 percent (max with G less than or equal to 32) over temperature. All devices use a standard SPI serial interface with daisy-chain capability.

Other highlights include an offset of 100 uV (max) and an offset drift of 1.2 uV/C (max), low noise (12 nV/rtHz typical) and wide bandwidth (10 MHz in G=1). In addition, the devices feature low input on-channel current (5 nA max) and shutdown that can achieve a supply current of less than 4 uA (typical). The PGA11x family is also specified over an extended temperature range of -40C to +125C.

In combination with the PGA11x family, TI provides customers with a state-of-the-art signal chain solution, including ADCs (such as the ADS8318 and ADS7886) and voltage references (such as the REF32xx). The PGA11x family is optimized to work with TI's MSP430 ultra low-power microcontroller family.

Availability, packaging and pricing

The PGA112 and PGA113 are available now from TI and its authorized distributors. Both devices are packaged in a MSOP-10 and are priced from $1.00 each in 1,000-piece quantities (suggested resale price). The PGA116 and PGA117 are available in a TSSOP-20 package and priced from $1.85 each in 1,000-piece quantities.

To learn more about TI's comprehensive portfolio of amplifiers and data converters and to download the latest Amplifier and Data Converter Selection Guide, visit amplifier.ti.com. For more information on TI's complete analog design support, visit www.ti.com/analogelab.

TI reduces car audio system cost by up to 50 percent with highly-efficient Class-D audio amplifiers

NewsCenter — Tue, 21 Oct 2008 08:00:00 GMT

New devices extend family and provide increased system flexibility

DALLAS (Oct. 21, 2008) - Continuing to drive innovation to meet the specific needs of its automotive customers, Texas Instruments Incorporated (TI) (NYSE: TXN) today extended its market-leading TAS54xx family of highly-efficient Class-D audio amplifiers with two new devices. The new amplifiers offer greater integration and channel flexibility, saving OEMs up to 50 percent system cost when designing automotive head unit and external amplifier applications. The latest devices offer customers the same great electromagnetic compliance (EMC) and audio performance of the TAS54xx family while providing more system-level flexibility. The amplifiers will be on display at Convergence 2008 at booth #600. (See www.ti.com/tas5412-pr.)

The TAS5412 with single-ended inputs and TAS5422 with differential inputs provide OEMs with improved system design flexibility when combined with TI's existing four-channel amplifier devices, the TAS5414A and TAS5424A. Now car audio system architects can optimize designs that require two or six channels by more efficiently matching the number of speakers while maintaining high levels of integration. In addition, the new TAS5412 and TAS5422 are designed to operate in car audio systems without a microcontroller, offering system-level cost savings.

The TAS5412 and TAS5422 provide superior EMC performance, a key requirement that determines whether electrical components will negatively interfere with other electronic systems within the vehicle. Both amplifiers use the same patent-pending technology from the field-proven TAS54x4A, which surpasses CISPR-25 Level 5 and many OEM-specific requirements, to ensure that high-power audio systems do not compromise vehicle operation.

In addition, the TAS5412 and TAS5422 support higher voltage and current capabilities, enabling a higher maximum output power for applications where feature densities and system configurations require reduction in heat from the audio power amplifier. The amplifiers also incorporate patented PWM designs that provide excellent power supply rejection in the harsh electrical environment common in automotive applications.

Availability, pricing and certification

The TAS5412 and TAS5422 are sampling now with volume production scheduled for the first quarter of 2009. The TAS5412 is $5.30 and the TAS5422 is $5.80 in 1000-piece quantities. For more information, please see www.ti.com/tas5412 or www.ti.com/tas5422. Both amplifiers are scheduled for AEC-Q100 qualification. Additional members of the TAS54xx family and pricing in 1000-piece quantities are summarized below.

Device	Feature	Package	Price
TAS5414ATDKD	Single-ended inputs	64-pin QFP	$10.00
TAS5414ATPHD	Analog inputs	36-pin PSOP	$8.80
TAS5424ATDKD	Differential inputs	44-pin PSOP	$10.75
TAS5424ATPHD	Analog inputs	64-pin QFP	$9.50

Extending TI's automotive portfolio

The latest audio amplifiers extend TI's products for the automotive market, which are designed and manufactured in ISO/TS16949 certified facilities. With more than 30 years of experience providing customer's with solutions to challenging automotive designs, TI enables manufacturers to achieve the quality, reliability and cost goals needed to succeed in today's marketplace. For additional information on TI's automotive products, please see www.ti.com/auto.

TI introduces lowest power video amplifiers for component and composite SDTV in consumer applications

NewsCenter — Tue, 30 Sep 2008 08:00:00 GMT

57 percent less power than competition supports system compliance with ENERGY STAR

DALLAS (Sept. 30, 2008) - To help manufacturers design energy-efficient consumer electronics, Texas Instruments Incorporated (TI) (NYSE: TXN) introduced today a flexible four-channel video buffer that consumes 57 percent less power than its closest competitor. The new device also includes a power-down feature to lower system power consumption even more and help enable manufacturers to achieve ENERGY STAR compliance in set-top boxes (STBs) and personal and digital video recorders (PVRs and DVRs). The balance of ultra-low power and reduced space and cost also makes the amplifier well-suited for video surveillance systems and SCART audio/video connectors. Available development tools help manufacturers easily configure and test the amplifier for SCART applications, eliminating the need for costly components. (For more information, see www.ti.com/ths7374-pr.)

The THS7374 and THS7375 support a wide supply voltage range of +2.85-V to +5.5-V, providing designers with maximum flexibility while consuming minimal power. The devices feature a 9.6-mA total quiescent current at 3.3-V supply for all four channels. Even operating at 5-V, each device consumes only 10-mA total quiescent power. A power-down option further reduces quiescent current consumption to 0.1-uA, making the THS7374/5 ideal choices for consumer device systems seeking ENERGY STAR compliance.

Further adding to the devices' flexibility, the THS7374/5 video amplifiers also include a 6th order 9.5-MHz Butterworth filter used as a digital-to-analog converter (DAC) reconstruction filter or an analog-to-digital converter (ADC) anti-aliasing filter to deliver higher quality analog video outputs or inputs. The filter is well-suited for SDTV video, allowing the THS7374/5 to simultaneously support a composite (CVBS) video channel, along with three channels to support s-video and component Y'U'V', G'B'R' (R'G'B'), or Y'P'bP'r 480i/576i. Additionally, the filter can be bypassed to provide a 150-MHz amplifier bandwidth to support wider bandwidth signals.

The THS7374/5 supports multiple input and output configurations for either AC- or DC-coupled applications. On the output side, the devices' deliver 80-mA output current drive capability, which can drive two lines per channel or 75-Ohm loads. In addition, the THS7374's rail-to-rail output stage includes a 6-dB gain for video line driving.

Extending TI's offering for video designs

TI complements its video amplifiers with its suite of DaVinci^TM digital media processors. The THS7375 provides a 15-dB output gain, enabling SDTV-compliant outputs from the processor and providing power savings and analog signal filtering to improve analog video quality.

In addition, TI provides a host of signal chain and power management devices to be used in conjunction with the THS7374/5 to help manufacturers meet ENERGY STAR requirements in a STB design, including the recently introduced TPS54331, a 3-A 28-V DC/DC converter with Eco-mode^TM light load efficiency. Evaluation modules and samples of the TPS54331 are available at www.ti.com/tps54331-pr.

Availability, pricing and support

The THS7374 and THS7375 are available now in a 14-pin TSSOP lead-free (RoHS compatible) and green-compliant package. Suggested resale pricing in quantities of 1,000 is $0.55. In addition, the THS7374 evaluation module (EVM) is available for device testing while the TSW7374EVM enables manufacturers to rapidly design and evaluate SCART applications. Samples and evaluation modules (EVMs) are available at www.ti.com/ths7374.

TI unveils lowest power zero-drift instrumentation amplifier for portable, precision applications

NewsCenter — Mon, 14 Jul 2008 08:00:00 GMT

Device improves accuracy and extends battery life

DALLAS (July 14, 2008) - Providing an unmatched combination of precision, low power and low supply voltage, Texas Instruments Incorporated (TI) (NYSE: TXN) today introduced the industry's lowest power zero-drift instrumentation amplifier. The device features the lowest quiescent current and lowest input bias current versus the nearest competition, as well as an impressive power-to-noise ratio, very low offset voltage/drift and 1.8 V operation. Consequently, the INA333 improves accuracy and stability while extending battery life in a variety of precision, low-power applications such as portable medical, handheld instrumentation, weigh scales and data acquisition. (See www.ti.com/ina333-pr.)

"Customers are consistently demanding higher precision combined with lower power and lower operating voltages in order to increase the performance and value of their sensor signal acquisition systems," said Art George, senior vice president of TI's High-Performance Analog business unit. "The INA333 leverages our expertise in analog signal conditioning to deliver a new standard for precision, low-power instrumentation amplifiers and enable our customers to gain a competitive advantage in the market."

The INA333 utilizes TI's zero-drift technology, which incorporates a proprietary switched-capacitor notch filter to eliminate chopping noise and provide very low input voltage noise of 50 nV/rt-Hz. The device features a versatile three op amp architecture to simplify design and reduce board space.

With only 75 uA of quiescent current and operation on power supplies as low as 1.8 V, the INA333 maximizes power efficiency. Low offset voltage of 25 uV and offset drift of 0.1 uV/C deliver excellent accuracy and long-term stability. Applications with high impedance sources will benefit from low input bias current of 200 pA.

Special filters have been integrated in series with the inputs of the INA333 to reduce radio frequency (RF) interference. This can dramatically reduce susceptibility to RF-induced offset voltage variations, which can be a critical advantage in applications that require DC stability, such as weigh scales.

The INA333 joins TI's state-of-the-art signal chain solution for precision, low-power applications: analog-to-digital converters such as the ADS1158; operational amplifiers such as the OPA333; digital isolators such as the ISO721; and temperature sensors such as the TMP102. The INA333 is also optimized to work with TI's MSP430 ultra-low power microcontroller family.

Availability and packaging

The INA333 is available now from TI and its authorized distributors in an MSOP-8 package. A DFN-8 package will be available in 3Q 2008. Suggested resale pricing starts at $1.80 in 1,000-piece quantities. TINA-TI SPICE-based analog simulation software is also available for easy-to-use circuit simulation.

TI offers analog engineers a wide-ranging support infrastructure that includes training and seminars, design tools and utilities, technical documentation, evaluation modules, an online KnowledgeBase, a product information hotline and a comprehensive offering of samples that ship within 24 hours of request. For more information on TI's complete analog design support, visit www.ti.com/analogelab.

TI boosts portable audio performance with industry's first stereo Class-D amplifier featuring dynamic range compression and speaker protection

NewsCenter — Mon, 07 Jul 2008 08:00:00 GMT

Device enhances volume and clarity in handsets and personal navigation devices

DALLAS (July 7, 2008) - Texas Instruments Incorporated (TI) (NYSE:TXN) today introduced a highly advanced, filter-free, stereo Class-D amplifier that provides a 1.7-W per channel output drive capability across an 8-Ohm load and improves overall volume versus traditional Class-D products. The new amplifier incorporates programmable dynamic range compression (DRC) that automatically adjusts the audio to the desired loudness range while protecting the speaker and preventing clipping and distortion. In addition, the chip's flexibility and intuitive support tools ease design and speed time to market for manufacturers of wireless handsets, personal navigation devices, notebook PCs and portable DVD players. (See www.ti.com/tpa2016d2-pr.)

Programmable DRC boosts volume while protecting the speaker

To address the need for louder volume from the speaker, the feature-rich TPA2016D2 incorporates DRC to automatically boost soft volumes. Conversely, DRC enables designers to compress the dynamic range of the audio to match the dynamic range of the speaker in order to reduce disturbingly loud volumes that cause clipping and distortion. The DRC functionality also protects the speaker from damage at high power levels to avoid field failures. In addition, the DRC capability in the TPA2016D2 frees up to 20 percent of MIPS in the digital signal processor (DSP) for other functions.

Flexibility and dynamic tools ease design and speed time to market

The DRC can be programmed via digital I2C control and provides designers with the flexibility to specify the design parameters that optimize their system's audio performance. For instance, users can select gains from -28 dB to +30 dB as well as program attack/hold/release times, compression ratios and noise threshold values.

Evaluation modules (EVMs) with software, including user-friendly graphic user interface (GUI), illustrate the complete flexibility of DRC. The GUI includes a dynamically changing graphical plot that visually depicts the input-output relationship for easy comprehension and rapid evaluation to speed time to market.

Extending TI's portfolio of portable audio solutions

The TPA2016D2 amplifier is optimized to work with other products from TI's broad portfolio including audio converters (TLV320AIC3104, TLV320AIC33 and TLV320AIC34), digital-to-analog converters (TLV320DAC32, PCM1774) and headphone amplifiers (TPA4411, TPA6130A2). The TPA2016D2 can be used in conjunction with TI's DSP and OMAP^TM processors, or the company's highly integrated LoCosto^TM or OMAP-Vox^TM solutions for wireless handsets.

Pricing and availability

The TPA2016D2 Class-D amplifier is available now from TI and its authorized distributors in a space-saving 2.2-mm x 2.2-mm, NanoFree^TM WCSP package. Suggested resale pricing is $1.60 in 1,000-unit quantities. Samples and EVMs are available at www.ti.com/tpa2016d2.

TI introduces industry's highest linearity amplifier for differential signals

NewsCenter — Tue, 10 Jun 2008 08:00:00 GMT

Current feedback architecture delivers larger gains at wide bandwidths to maximize design flexibility

DALLAS (June 10, 2008) - Texas Instruments Incorporated (TI) (NYSE: TXN) introduced today a dual-channel, high-speed current feedback amplifier. The device features 70 percent greater bandwidth gain at +2 V/V than competitive devices, providing fast signal conditioning with the highest linearity to minimize distortion for better signal fidelity and easier filtering. The amplifier offers wide supply voltage options and large gain capability, giving engineers the flexibility to adjust the parameters to address the specific need, such as high gain for differential signals or high output voltage or current for low power consumption. In addition, the device’s optimized symmetrical package eases layout for cost-effective precision IF amplifiers, high-speed arbitrary waveform output drivers, wideband analog-to-digital converter (ADC) drivers and active filters. (For more information see www.ti.com/opa2695-pr.)

Current feedback architecture optimizes bandwidth and slew rate and minimizes distortion

Unlike traditional voltage feedback or fully differential amplifiers, the OPA2695 offers a new level of performance for high-speed applications. Due to its current feedback architecture, the OPA2695 can deliver a high bandwidth of 850 MHz at a gain of +2 V/V and a fast slew rate of 2900 V/µs to process high-speed signals.

The architecture also provides wider bandwidth capability at much higher gains than can be achieved with a voltage feedback architecture. In contrast, fully differential amplifiers, which are popular for differential signal paths and are based on a voltage feedback architecture, suffer from reduced bandwidths at larger gains.

The OPA2695 combines the current-feedback architecture with an optimized differential pin-out, which provides superior gain and bandwidth, maintains high linearity with low harmonic distortion levels, and eases the design process. The pin-out gives super-symmetrical signal paths with input and output pins on opposite sides of the chip to greatly simplify PC board layout.

Furthermore, the optimized pin-out enables superior even-order harmonic distortion, which cannot be achieved by other current feedback devices with traditional pin-out configurations. The OPA2695 provides second-order harmonics (HD2) of 94 dBc and third-order harmonics (HD3) of 93.5 dBc at 10 MHz for differential signals, and HD2 of better than 90 dBc up to 55 MHz at a large gain of +10 V/V, which reduces in-band harmonic distortion while easing the filtering of out-of-band even order harmonics.

Supply voltage options increase design flexibility

In addition, designers have the flexibility to provide a single supply voltage (3.5 V to 12 V) or a dual supply voltage (+/-1.75 V to +/-6 V) to the OPA2695 to suit their requirements. For example, with a supply voltage of ±5 V and gain of +8 V/V, the OPA2695 can deliver a large output voltage swing of +/-4.1 V or 8.2 Vpp with a 120 mA sourcing or sinking output drive current into an ADC for accurate digitization.

Alternatively, at a lower single supply voltage of +5 V, the device can save power while still delivering +/-90 mA output current with a 3.4 Vpp for power-sensitive applications, such as handheld portable devices. To further reduce power consumption, a power down option is also available, which reduces the quiescent current consumption to 80 µA.

The OPA2695 extends TI's high-speed, current feedback amplifier portfolio, which offers the industry's widest bandwidth. The offering includes the following:

	# of Ch	Slew Rate (V/µs)	Bandwidth (MHz)	Supply Voltage (min) (V)	Supply Voltage (max) (V)	Quiescent Current (typ) (mA)	Current Output (typ) (mA)
OPA695, OPA2695, OPA3695	1,2,3	2900 (2) 4300 (1,3)	1700	+/-1.75	+/-6	12.9	+/- 120
OPA694, OPA2694	1,2	1700	1500	+/-3.5	+/-6.3	5.8	+/-80
THS3201, THS3202	1,2	5200	1800	+/-3	+/-7.5	14	+/-100

For more information and to download the latest Amplifier and Data Converter Selection Guide, please see www.ti.com/amplifier

Availability, pricing and support

The OPA2695 is available today in a SO-8 and QFN-16 package. Suggested resale pricing is $2.10 in quantities of 1,000. Samples and evaluation modules of the OPA2695, single-channel OPA695 and triple-channel OPA3695 are available from www.ti.com/opa2695

New TI amplifiers reduce audio solution cost for flat panel TVs

NewsCenter — Mon, 02 Jun 2008 08:00:00 GMT

15-W Class-D amplifiers operate from 24-V backlight supply and drive single-ended outputs

DALLAS (June 2, 2008) - Texas Instruments Incorporated (TI) (NYSE:TXN) today introduced its second-generation, 15-W, stereo analog-input Class-D amplifiers with single-ended outputs. These highly-efficient devices eliminate components to reduce total solution size and cost in HDTVs and other consumer audio electronics. Innovative features address single-ended design challenges to ensure robust and reliable audio performance in LCD, plasma and DLP&#174 TVs and other home audio products. (For more information see www.ti.com/tpa3121d2-pr.)

Eliminating components to enable cost-efficient and compact designs

As industrial design and increasingly smaller form factors become standard in the HDTV market, manufacturers face increasing price and size pressures. The TPA3121D2 and TPA3124D2 address these challenges. Single-ended architectures reduce bill of material (BOM) costs and save board area by eliminating two LC output filters. To further reduce cost, both devices can run off the existing +24-V backlight rail in a LCD HDTV, eliminating the need for a dedicated power rail. The BOM for an audio solution based on these devices is extremely clean when compared to the competition, with OEMs typically seeing up to 25 percent lower cost. With greater than 90 percent efficient operation, the new amplifiers also eliminate the need for a heat sink. Eliminating costly components reduces overall system cost and allows for a sleeker design.

Providing robust and reliable audio performance

The TPA3121D2 and TPA3124D2 reduce the BOM and save board space while providing robust performance. The devices leverage TI's field-proven technology to solve the click and pop challenges typically associated with single-ended solutions. Along with single-ended stereo support, the TPA3121D2 and TPA3124D2's outputs can be configured in BTL mode to support 30-W mono applications, such as wireless speakers or subwoofers. In addition, the TPA3124D2 features a fast mute time of 30 us. Depending on the video processor, a faster mute may be necessary to reduce power-loss pop. To ensure reliability, both devices are fully protected with integrated self-protection circuits against faults, including over-voltage, under-voltage, over-temperature and short circuit.

Extending TI's portfolio of home audio offerings for HDTVs

The TPA3121D2 and TPA3124D2 join TI's offering of single-ended audio solutions for HDTVs and consumer audio electronics. In addition, to address the market shift toward I2S inputs, TI offers digital-input, closed-loop Class-D solutions such as the recently-released TAS5706. For customers requiring more sophisticated audio processing, TI also provides a complete line of high-performance processors. For more information, see www.ti.com/tas5706 or www.ti.com/tas3308.

Pricing and availability

The TPA3121D2 and TPA3124D2 are available today from TI and its authorized distributors. The table below summarizes the feature set, packaging and suggested resale price of these devices and the entire TPA312xD2 family.

Device	Stereo Power	Mono Power	Power Supply	Fast Mute Support	Package	1KU Price
TPA3122D2	15W	30W	10-30V	No	20-DIP	$0.99
TPA3121D2	15W	30W	10-26V	No	24-TSSOP	$1.45
TPA3124D2	15W	30W	10-26V	Yes	24-TSSOP	$1.45
TPA3123D2	25W	50W	10-30V	No	24-TSSOP	$1.75

The TPA3121D2 is pin compatible with the TPA3124D2 and the TPA3123D2. Pin-to-pin compatibility enables manufacturers to leverage a single-board design across multiple product lines. To order samples and evaluation modules (EVMs) or to download the Audio solutions guide, see www.ti.com/tpa3121d2.

TI introduces family of zero-drift, bi-directional current shunt monitors in SC70 packages

NewsCenter — Thu, 29 May 2008 07:00:00 GMT

Devices improve accuracy and reduce board space

DALLAS (May 29, 2008) - Texas Instruments Incorporated (TI) (NYSE: TXN) today introduced a family of high- or low-side measurement, bi-directional current shunt monitor integrated circuits (ICs) in SC70 packages. Utilizing a zero-drift bi-directional architecture, the INA210 family provides outstanding accuracy up to 1 percent over the -40C to +125C temperature range, with 35uV maximum offset. The near elimination of offset with zero-drift reduces the voltage drop and power dissipation in the accompanying shunt resistor by an order of magnitude, which reduces cost and circuit board real estate. The ICs can be used in a wide variety of applications, including servers, telecom equipment, automotive, battery management, computers, power supplies and test equipment. (See www.ti.com/ina210-pr.)

The INA210 family features a common-mode range from -0.3V to +26V, ensuring the ability to sense current, even on shorted power supplies. The inputs withstand differential inputs all the way up to the full common-mode capability. The bi-directional topology includes a reference pin for biasing the quiescent output to suit either unidirectional or bi-directional applications. The product family operates from a single +2.7 to +26 voltage supply. A low 100uA quiescent current minimizes drain in portable applications and enables shutdown by simply removing the power supply. Even with the power off, the shunt inputs withstand the full common-mode voltage.
The product family is available in a choice of five gains to address different application requirements. Tailored for very low drop current sensing are the INA210 (gain of 200), INA211 (gain of 500) and INA212 (gain of 1000). Combining low offsets and gains, the INA213 (gain of 50) and INA214 (gain of 100) are great solutions for wide dynamic range current sensing.

Availability, packaging and pricing

All members of the INA210 family are available now in an SC70-6 package from TI and its authorized distributors. The devices are priced at $0.65 in 1,000-piece quantities (suggested resale price).

TI offers analog engineers a wide-ranging support infrastructure that includes training and seminars, design tools and utilities, technical documentation, evaluation modules, and online KnowledgeBase, a product information hotline and a comprehensive offering of samples that ship within 24 hours of request. For more information on TI's complete analog design support, and to download the latest Amplifier and Data Converter Selection Guide, visit www.ti.com/analogelab.

TI introduces Class-D audio amplifier with integrated boost converter to drive 1.5-W constant output power

NewsCenter — Tue, 06 May 2008 08:00:00 GMT

Maintains loud volume across battery range to enhance portable audio performance

DALLAS (May 6, 2008) - Texas Instruments Incorporated (TI) (NYSE:TXN) today introduced a monolithic, filter-free Class-D audio amplifier with an integrated boost converter for portable applications including wireless handsets, personal navigation devices, portable gaming and wireless speakers. Addressing the need for louder volume and higher output power from the speakers, the TPA2014D1 provides up to 1.5 W across an 8-Ohm load, ensuring that volume is maintained even when the battery discharges to its minimum voltage. (See www.ti.com/tpa2014d1-pr.)

Conventional Class-D amplifiers for portable devices are designed to provide high output power, which is dependent on battery voltage. As the battery discharges, the maximum output power decreases, causing reduced volume and increased distortion. The TPA2014D1 provides a higher constant output power across the entire Li-Ion battery range, thus maintaining loud volume, even as the battery discharges. In addition, the TPA2014D1 has a high overall efficiency of 85 percent, which results in longer battery life and increased talk/playback time.
Additional features of the device enhance portable audio performance. The TPA2014D1 features a wide voltage supply range of 2.5 V to 5.5 V and a very high power supply rejection ratio (PSRR) of 91 dB, which simplify power supply design and enable a connection directly to the battery without any degradation of sound quality. The TPA2014D1 includes an integrated phase-locked loop (PLL), which synchronizes the Class-D amplifier and boost converter clocks in order to eliminate potential audible beat frequencies.

Pricing and availability

The TPA2014D1 Class-D audio power amplifier is available now from TI and its authorized distributors in a 4 mm x 4 mm QFN package and will be available at the end of May in a very small 2.3 mm x 2.3 mm WCSP package, saving cost and considerable board area. Suggested resale pricing is $1.32 for the QFN package and $1.40 for the WCSP package in 1,000-piece quantities. Samples and EVMs are available from ti.com/audio.

Extending TI's offering for portable devices

The TPA2014D1 extends TI's portfolio of Class-D amplifiers for the portable market, such as the TPA2013D1, which is available for customers requiring higher output power and the ability to drive a 4-Ohm load. Both devices are designed to work with TI's portable audio converters such as the TLV320AIC3106, the TLV320DAC32 digital-to-analog converter and the Aureus^TM platform of audio DSPs. TI provides the silicon, software, systems expertise and support for the entire audio signal chain, enabling customers to get to market quickly. For more information see the Audio Solutions Guide at ti.com/audio. In addition, see TI's power management products for portable consumer applications at power.ti.com.

TI introduces industry's first closed-loop PWM-input amplifier power stage

NewsCenter — Tue, 08 Apr 2008 08:00:00 GMT

Device improves sound, reduces system cost and simplifies design in HDTVs and media docking stations

DALLAS (April 8, 2008) - Texas Instruments Incorporated (TI) (NYSE:TXN) today introduced the industry's first PWM-input 20-Watt stereo Class-D power stage with closed-loop feedback. Extending TI's portfolio of closed-loop architecture offerings, the highly efficient power stage produces a more accurate sound, improves EMC performance, and relaxes power supply performance requirements to lower system cost. The flexible device supports multiple output configurations and includes a simple PWM interface to a video or audio processor to ease design and speed time to market for manufacturers of LCD, plasma and DLP&#174 TVs and media docking stations. (See www.ti.com/tas5601-pr.)

Closing the loop in digital performance while lowering system cost

Improving audio performance, the closed loop architecture of the TAS5601 enables the audio subsystem greater control over the speaker, reproducing a more accurate sound with improved bass response. The superior power supply rejection ratio (PSRR) of closed loop architectures reduces power supply noise coupling into the audio band, allowing engineers to design lower-cost power supplies. The EMC performance is also greatly improved by slowing down the output edge transitions while still maintaining excellent THD+N. The TAS5601 is more than 90 percent efficient and requires only two supplies, a 3.3 V and 10 V to 26 V rail. Supporting operation up to +26 V allows LCD-TV manufacturers to power the device off the existing +24 V backlight rail, eliminating the need for a dedicated audio power rail and further lowering system cost.

In addition, the TAS5601 is fully protected with integrated self-protection circuits against faults including over-voltage, under-voltage, over-temperature and short circuit. Short-circuit faults and thermal warnings are reported back to the system controller.

Device flexibility eases design and reduces development time

The flexible platform of the TAS5601 supports multiple output configurations for driving two bridge-tied speakers, four single-ended speakers, or a combination of single and bridge-tied speakers for 2.1 system support. To further simplify design and speed time to market, the TAS5601 includes a simple PWM interface to a video processor or a digital audio processor such as TI's recently introduced TAS3308 audio System on a Chip (SoC). For more information see www.ti.com/tas3308.

Pricing and availability

The TAS5601 is available today in a 56-pin HTTSOP package. The TAS5601 is priced at $2.00 in 1000-piece quantities.

Extending TI's offering for home entertainment audio

The TAS5601 joins TI's complete offering for home entertainment audio and extends TI's portfolio of closed-loop architecture offerings for the HDTV and media docking station markets. From industry-leading digital signal processors (DSPs) and high-performance analog to logic and an extended portfolio of application software, TI delivers reliable, scalable and power-efficient solutions for simple and complex audio designs. For more information see the Audio Solutions Guide at ti.com/audio.

TI introduces industry's lowest power, high-speed, voltage feedback amplifier

NewsCenter — Tue, 25 Mar 2008 08:00:00 GMT

New device features 90 percent lower power for portable applications

DALLAS (Mar. 25, 2008) - Texas Instruments Incorporated (TI) (NYSE: TXN) introduced today a high-speed, unity gain stable, voltage feedback amplifier that features more than 90 percent less power than devices with comparable slew rates in the market today. The new device's unique architecture provides designers with high bandwidth and slew rate, coupled with a very low quiescent current, making it well-suited for portable instrumentation, active filters and analog-to-digital converter (ADC) buffers. (For more information see www.ti.com/opa2889-pr.)

The OPA2889 represents a significant evolution in unity gain stable, voltage feedback amplifiers, offering an excellent combination of bandwidth and slew rate capabilities while consuming only 460 uA of quiescent current per channel. Coupled with the ultra low power, the high bandwidth of 115 MHz and slew rate of 250 V/us, allows customers to process data faster and more efficiently. The device also includes a power down feature, enabling even further power savings by reducing the quiescent current to 18 uA/channel when not in use.
Along with the bandwidth and slew rate capabilities, the OPA2889 offers a flexible single supply voltage range of +2.6 V to +12 V or dual supply voltage range of +/-1.3 V to +/-6 V. In addition, it provides a large output swing of 8 Vpp and output current of +/- 40 mA. These features minimize signal distortion to increase fidelity while giving designers greater flexibility.
The latest offering extends TI's high-speed, low-power voltage and current feedback amplifier offerings including those summarized below.

For more information and to download the latest Amplifier and Data Converter Selection Guide, please see www.ti.com/amplifier.

Availability, pricing and support

The OPA2889 is available today in a SOIC-8 and MSOP-10 package. Suggested resale pricing is $1.35 in quantities of 1,000. Samples and evaluation modules of the OPA2889 and other devices are available from www.ti.com.