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PCM2912A

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Audio CODEC with USB Interface, Mono Microphone Input and Stereo Headphone Output

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Data sheet
Errata
Audio CODEC with USB Interface, Mono Microphone Input and Stereo Headphone Output

PCM2912A

ACTIVE
Data sheet Order now

Product details

Number of ADC channels 1 Number of DAC channels (#) 2 Analog inputs 1 Sampling rate (Max) (kHz) 48 Control interface H/W Features USB Interface, Mic Bias, PGAs, Sidetone Analog outputs 2
Number of ADC channels 1 Number of DAC channels (#) 2 Analog inputs 1 Sampling rate (Max) (kHz) 48 Control interface H/W Features USB Interface, Mic Bias, PGAs, Sidetone Analog outputs 2
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TQFP (PJT) 32 81 mm² 9 x 9
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  • On-Chip USB Interface:
    • With Full-Speed Transceivers
    • Fully Compliant With USB 2.0 Specification
    • Certified By USB-IF
    • Partially Programmable Descriptors
    • Adaptive Isochronous Transfer for Playback
    • Asynchronous-Isochronous Transfer for
      Record
    • Bus Powered
  • 16-Bit Delta-Sigma ADC and DAC
  • Sampling Rate:
    • 8, 11.025, 16, 22.05, 32, 44.1, or 48 kHz
  • On-Chip Clock Generator:
    • With Single 6-MHz Clock Source
  • Mono ADC with Microphone Input
    • Analog Performance at VBUS = 5 V:
      • THD+N: 0.01%
      • SNR: 92 dB
      • Dynamic Range: 90 dB
    • Decimation Digital Filter
      • Passband Ripple: ±0.05 dB
      • Stop-Band Attenuation: –65 dB
    • Single-Ended Voltage Input
    • Antialiasing Filter Included
    • Digital HPF Included
    • Microphone Bias, Microphone Amplifier, and
      Input PGA
  • Stereo DAC With Headphone Output
    • Analog Performance at VBUS = 5.0 V:
      • THD+N: 0.01% (RL > 10 kΩ)
      • THD+N: 0.02% (RL = 32 Ω)
      • SNR: 92 dB
      • Dynamic Range: 90 dB
      • PO: 13 mW (RL = 32 Ω)
      • PO: 25 mW (RL = 16 Ω)
    • Oversampling Digital Filter
      • Passband Ripple: ±0.1 dB
      • Stop-Band Attenuation: –43 dB
      • Single-Ended Voltage Output
      • Analog LPF Included
      • Sidetone PGA, Output PGA, and HP
        Amplifier
  • Multifunctions:
    • Suspend, Playback, and Record Status Flag
    • Microphone Amplifier, Mute, and Gain Control
  • Pop/Click Noise-Free
  • Single Power-Supply: 5 V Typical (VBUS)
  • Package: 32-Pin TQFP
  • On-Chip USB Interface:
    • With Full-Speed Transceivers
    • Fully Compliant With USB 2.0 Specification
    • Certified By USB-IF
    • Partially Programmable Descriptors
    • Adaptive Isochronous Transfer for Playback
    • Asynchronous-Isochronous Transfer for
      Record
    • Bus Powered
  • 16-Bit Delta-Sigma ADC and DAC
  • Sampling Rate:
    • 8, 11.025, 16, 22.05, 32, 44.1, or 48 kHz
  • On-Chip Clock Generator:
    • With Single 6-MHz Clock Source
  • Mono ADC with Microphone Input
    • Analog Performance at VBUS = 5 V:
      • THD+N: 0.01%
      • SNR: 92 dB
      • Dynamic Range: 90 dB
    • Decimation Digital Filter
      • Passband Ripple: ±0.05 dB
      • Stop-Band Attenuation: –65 dB
    • Single-Ended Voltage Input
    • Antialiasing Filter Included
    • Digital HPF Included
    • Microphone Bias, Microphone Amplifier, and
      Input PGA
  • Stereo DAC With Headphone Output
    • Analog Performance at VBUS = 5.0 V:
      • THD+N: 0.01% (RL > 10 kΩ)
      • THD+N: 0.02% (RL = 32 Ω)
      • SNR: 92 dB
      • Dynamic Range: 90 dB
      • PO: 13 mW (RL = 32 Ω)
      • PO: 25 mW (RL = 16 Ω)
    • Oversampling Digital Filter
      • Passband Ripple: ±0.1 dB
      • Stop-Band Attenuation: –43 dB
      • Single-Ended Voltage Output
      • Analog LPF Included
      • Sidetone PGA, Output PGA, and HP
        Amplifier
  • Multifunctions:
    • Suspend, Playback, and Record Status Flag
    • Microphone Amplifier, Mute, and Gain Control
  • Pop/Click Noise-Free
  • Single Power-Supply: 5 V Typical (VBUS)
  • Package: 32-Pin TQFP
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The PCM2912A is the Texas Instruments single-chip, USB stereo audio codec with a USB, 2.0-compliant, full-speed protocol controller and an analog front-end (AFE) function for headset applications.

The USB protocol controller works with no software code, but USB descriptors can be modified on request. The PCM2912A employs SpAct™ architecture, TI’s unique system that recovers the audio clock from USB packet data. On-chip analog PLLs with SpAct enables independent playback and record sampling rates with low clock jitters.

The PCM2912A is the Texas Instruments single-chip, USB stereo audio codec with a USB, 2.0-compliant, full-speed protocol controller and an analog front-end (AFE) function for headset applications.

The USB protocol controller works with no software code, but USB descriptors can be modified on request. The PCM2912A employs SpAct™ architecture, TI’s unique system that recovers the audio clock from USB packet data. On-chip analog PLLs with SpAct enables independent playback and record sampling rates with low clock jitters.

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Technical documentation

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Type Title Date
* Data sheet PCM2912A Audio Codec With USB Interface, Mono Microphone Input and Stereo Headphone Output datasheet (Rev. A) 25 Aug 2015
* Errata Application Information for Difference Between PCM2912A and PCM2912 25 Nov 2008
Application note Operating Environments for PCM2912A Applications (Rev. A) 10 Nov 2016
Application note Solving Enumeration Errors in USB Audio DAC and CODEC Designs 30 Oct 2009
User guide PCM2912A User's Guide 22 Jan 2009
Application note Dynamic Performance Testing of Digital Audio D/A Converters 02 Oct 2000

Design & development

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Evaluation board

DEM-PCM2912AEVM — DEM-PCM2912AEVM Evaluation Module

The DEM-PCM2912A EVM is a complete evaluation platform for the 16-bit, mono microphone input and stereo headphone output PCM2912A bus-powered audio codec with a USB interface. All necessary connectors and circuitry are provided for interfacing to audio test systems and commercial audio equipment.

A (...)

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PSpice® for TI is a design and simulation environment that helps evaluate functionality of analog circuits. This full-featured, design and simulation suite uses an analog analysis engine from Cadence®. Available at no cost, PSpice for TI includes one of the largest model libraries in the (...)
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