PCM2912A系列介绍资料

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PCM2912A

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具有 USB 接口、单声道麦克风输入和立体声耳机输出的音频编解码器

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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.

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 V_BUS = 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 V_BUS = 5.0 V:
  - THD+N: 0.01% (R_L > 10 kΩ)
  - THD+N: 0.02% (R_L = 32 Ω)
  - SNR: 92 dB
  - Dynamic Range: 90 dB
  - PO: 13 mW (R_L = 32 Ω)
  - PO: 25 mW (R_L = 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 (V_BUS)
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	Mic bias, PGAs, Sidetone, USB interface
Analog outputs	2
Rating	Catalog
Operating temperature range (°C)	-25 to 85

TQFP (PJT)

81 mm² 9 x 9

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PCM2912A

具有 USB 接口、单声道麦克风输入和立体声耳机输出的音频编解码器

4000-306-326