PCM2904 - 具有 USB 接口、单端输入/输出和 SPDI/F 的立体声音频编解码器

PCM2904是TI德州仪器公司的一款音频USB转换器产品，PCM2904是具有 USB 接口、单端输入/输出和 SPDI/F 的立体声音频编解码器，本站介绍了PCM2904的封装应用图解、特点和优点、功能等，并给出了与PCM2904相关的TI元器件型号供参考。

PCM2904 - 具有 USB 接口、单端输入/输出和 SPDI/F 的立体声音频编解码器 - 音频USB转换器 - 音频转换器 - 德州仪器

产品描述

The PCM2904/2906 is Texas Instruments single-chip USB stereo audio codec with USB-compliant full-speed protocol controller and S/PDIF (PCM2906 only). The USB protocol controller works with no software code, but the USB descriptors can be modified in some areas (for example, vendor ID/product ID). The PCM2904/2906 employs SpAct™ architecture, TI's unique system that recovers the audio clock from USB packet data. On-chip analog PLLs with SpAct enable playback and record with low clock jitter and with independent playback and record sampling rates.

产品特性

PCM2904: Without S/PDIF
PCM2906: With S/PDIF
On-Chip USB Interface:
- With Full-Speed Transceivers
- Fully Compliant With USB 1.1 Specification
- Certified by USB-IF
- Partially Programmable Descriptors(1)
- USB Adaptive Mode for Playback
- USB Asynchronous Mode for Record
- Bus Powered
16-Bit Delta-Sigma ADC and DAC
Sampling Rate:
- DAC: 32, 44.1, 48 kHz
- ADC: 8, 11.025, 16, 22.05, 32, 44.1, 48 kHz
On-Chip Clock Generator With Single 12-MHz Clock Source
Single Power Supply: 5 V Typical (VBUS)
Stereo ADC
- Analog Performance at VBUS = 5 V
  - THD+N = 0.01%
  - SNR = 89 dB
  - Dynamic Range = 89 dB
- Decimation Digital Filter
  - Pass-Band Ripple = ±0.05 dB
  - Stop-Band Attenuation = -65 dB
- Single-Ended Voltage Input
- Antialiasing Filter Included
- Digital LCF Included
Stereo DAC:
- Analog Performance at VBUS = 5 V
  - THD+N = 0.005%
  - SNR = 96 dB
  - Dynamic Range = 93 dB
- Oversampling Digital Filter
  - Pass-Band Ripple = ±0.1 dB
  - Stop-Band Attenuation = -43 dB
- Single-Ended Voltage Output
- Analog LPF Included
Multifunctions:
- Human Interface Device (HID) Volume ± Control and Mute Control
- Suspend Flag
Package: 28-Pin SSOP
APPLICATIONS
- USB Audio Speaker
- USB Headset
- USB Monitor
- USB Audio Interface Box

(1)The descriptor can be modified by changing a mask. SpAct is a trademark of Texas Instruments. System Two, Audio Precision are trademarks of Audio Precision, Inc.

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