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.

• 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

• 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

PCM2912A的完整型号有：PCM2912APJT、PCM2912APJTR，以下是这些产品的关键参数及官网采购报价：

PCM2912APJT，工作温度：-25 to 85，封装：TQFP (PJT)-32，包装数量MPQ：250个，MSL 等级/回流焊峰值温度：Level-1-260C-UNLIM，引脚镀层/焊球材料：NIPDAU，TI官网PCM2912APJT的批量USD价格：6.824（1000+）

PCM2912APJTR，工作温度：-25 to 85，封装：TQFP (PJT)-32，包装数量MPQ：1000个，MSL 等级/回流焊峰值温度：Level-1-260C-UNLIM，引脚镀层/焊球材料：NIPDAU，TI官网PCM2912APJTR的批量USD价格：5.687（1000+）

DEM-PCM2912AEVM — DEM-PCM2912AEVM 评估模块

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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