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

Advanced under voltage monitor enables more energy-efficient designs

Feb 4, 2009

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