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

PCM2912A

ACTIVE
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Product details

Parameters

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 open-in-new Find other Audio USB converters

Package | Pins | Size

TQFP (PJT) 32 81 mm² 9 x 9 open-in-new Find other Audio USB converters

Features

  • 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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Description

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) Aug. 25, 2015
* Errata Application Information for Difference Between PCM2912A and PCM2912 Nov. 25, 2008
Application note Operating Environments for PCM2912A Applications (Rev. A) Nov. 10, 2016
Application note Solving Enumeration Errors in USB Audio DAC and CODEC Designs Oct. 30, 2009
User guide PCM2912A User's Guide Jan. 22, 2009
Application note Dynamic Performance Testing of Digital Audio D/A Converters Oct. 02, 2000

Design & development

For additional terms or required resources, click any title below to view the detail page where available.

Hardware development

EVALUATION BOARD Download
document-generic User guide
99
Description

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 (...)

Features

Major features of the PCM2912A include: 

  •  Analog Front End: – Microphone amplifier (+20 dB gain) – Mono input
  • Analog Back End: – Stereo/Mono headphone amplifier or line output with volume
  • Analog Performance: – Dynamic range: 90 dB (DAC) – Dynamic range: 90 dB (ADC) – 25-mW   headphone output at RL = 16 W 
  • (...)
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Design tools & simulation

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PSpice® for TI design and simulation tool
PSPICE-FOR-TI — 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 (...)
Features
  • Leverages Cadence PSpice Technology
  • Preinstalled library with a suite of digital models to enable worst-case timing analysis
  • Dynamic updates ensure you have access to most current device models
  • Optimized for simulation speed without loss of accuracy
  • Supports simultaneous analysis of multiple products
  • (...)
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CAD/CAE symbols

Package Pins Download
TQFP (PJT) 32 View options

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