TI PCM186x 110dB立体声音频模数转换(ADC)解决方案
TI公司的PCM186x系列是音频前端器件,集成了许多系统级功能,可以替代某些DSP功能,采用新的方法集成音频功能,很容易和欧洲Ecodesign兼容,并开发出具有高性能终端产品和降低成本,通用的模拟麦克风输入,8个带MUX和PGA的模拟输入,4x数字麦克风输入,硬件可编程增益放大器和软件可编程增益放大器,主要用在家庭影院和TV,汽车音响,蓝牙扬声器以及麦克风阵列处理器.本文介绍了PCM186x系列主要特性和框图,系统配置框图和评估模块PCM186xEVM (EVM)特性,电路图,材料清单和PCB元件布局图.
The PCM186x family of audio front-end devices takes a new approach to audio-function integration to ease compliance with European Ecodesign legislation while enabling high-performance end products at reduced cost. With no need for a 5-volt supply or an external programmable-gain amplifier, smaller, smarter products are feasible at reduced cost.
The PCM186x highly flexible audio front end supports input levels from small-mV microphone inputs all the way to 2.1VRMS line Inputs without external resistor dividers. The PCM186x family integrates many system-level functions that assist or even replace some DSP functions.
All these features are available using a single 3.3V power supply. An integrated bandgap voltage reference provides excellent PSRR, so that a dedicated analog 3.3V rail may not be required.
PCM186x系列主要特性:
Universal Analog Mic Input, 2.1VRMS Full Scale ..
