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TI Simplifies Audio Design with a New Ultra Low-Jitter S/PDIF Receiver

24-bit, 96-kHz Digital Audio Interface Receiver Reduces System Size and External Component Count

Feb 27, 2007

DALLAS (Feb. 27, 2007) -- Texas Instruments Incorporated (TI) (NYSE: TXN) today introduced a 24-bit, 96-kHz digital audio interface receiver that provides the industry's best jitter performance as low as 50 ps RMS, which is four times better than the nearest stand-alone receiver. This highly-integrated device reduces the number of external components required and enhances sound quality in applications such as AV/DVD receivers and amplifiers, automotive audio systems, digital televisions, musical instruments, recording systems and high-performance PC audio interfaces. See www.ti.com/sc07033.

The DIR9001 allows the designer to control all functionality through the device's hardware control pins, eliminating the need for an external microcontroller. Additionally, the DIR9001 integrates a high-performance phase-lock loop (PLL) to not only improve jitter performance but also remove the need for an external clock source when the sample frequency calculator is not used. Both features reduce the overall system cost by eliminating additional system components that competing digital audio interface receivers typically require. Other benefits include:

  • Support for any input frequency from 28-kHz up to 108-kHz for stereo digital interfaces including S/PDIF, EIAJ CP-1201, IEC60958 and AES/EBU 
  • Superior overall system noise performance provided by the flexible master clock outputs with as low as 50 ps jitter 
  • Easier integration into existing designs with 5V-tolerant logic as well as selectable pulse-code-modulation (PCM) output formats 
  • Higher system intelligence and integration with the main control processor via the separate user data, channel data and sampling frequency outputs 
  • Wide ambient temperature range of -40C to +85C for automotive applications

The industry-leading jitter performance of the


makes it an ideal data and clock source for TI's high-performance digital-to-analog converter (DAC) products, such as the


, to provide the highest performance DAC output available today. The


also complements TI's wide range of S/PDIF and sample rate conversion (SRC) technologies for consumer and professional audio applications. TI's digital audio interface products range from 96-kHz receivers and transmitters to combination 216-kHz SRC and S/PDIF transceivers capable of 144 db SRC. To learn more about TI's digital audio interface products, please visit


Availability and Packaging

The DIR9001 is available now in a 28-pin TSSOP lead-free package and is priced at $1.95 each in 1,000-piece quantities. Samples are available to ship within 24 hours of request.

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. For more information on TI's complete analog design support, and to download the latest selection guides, visit TI’s 

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