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

PCM2912A是TI德州仪器公司的一款音频USB转换器产品，PCM2912A是具有 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，本站介绍了PCM2912A的封装应用图解、特点和优点、功能等，并给出了与PCM2912A相关的TI元器件型号供参考。

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 - 音频USB转换器 - 音频转换器 - 德州仪器

产品特性

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

产品应用

USB Headset
USB Headphone
USB Speaker
USB Featured Consumer Audio Product
USB Audio Interface Box
USB Monitor
Video Conference System

产品说明

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.

产品器件信息

PART NUMBER	PACKAGE	BODY SIZE (NOM)
PCM2912A	TQFP (32)	7.00 mm × 7.00 mm

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