PCM2912A中文资料具有 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数据手册TI规格书

描述 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.

特性 Features

• On-Chip USB Interface:
• Fully Compliant With USB 2.0 Specification
• Partially Programmable Descriptors
• Asynchronous-Isochronous Transfer for Record
• 16-Bit Delta-Sigma ADC and DAC
• On-Chip Clock Generator:
• Mono ADC with Microphone Input
• SNR: 92 dB
• Decimation Digital Filter
• Stop-Band Attenuation: –65 dB
• Antialiasing Filter Included
• Microphone Bias, Microphone Amplifier, and Input PGA
• THD+N: 0.02% (RL = 32 Ω)
• Dynamic Range: 90 dB
• PO: 25 mW (RL = 16 Ω)
• Stop-Band Attenuation: –43 dB
• Analog LPF Included
• Multifunctions:
• Microphone Amplifier, Mute, and Gain Control
• Single Power-Supply: 5 V Typical (VBUS)
• Package: 32-Pin TQFP