WolfsonWM859524位192kHz多路CODEC方案  2012/3/1

         Wolfson微电子公司的WM8595 是24位192kHz高性能多路音频CODEC,具有灵活的输入/输出选择以及数字与模拟音量控制.主要特性包括数字增益控制的24位立体声ADC,两个独立音量控制和时钟的24位DAC,以及各种输入/输出通路选择, DAC取样频率为32kHz-192kHz, DAC的SNR为100dB,THD为-87dB,而ADC的取样频率为32kHz-96kHz,主要用在平板电视,DVD-RW和STB.本文介绍WM8595主要特性, 方框图,推荐外接元件和模拟低通滤波器电路图以及评估板WM8595-6247-FL48-EV1-REV1 详细电路图和材料清单(BOM):

WM8595: 24-bit 192kHz 2Vrms Multi-Channel CODEC

The WM8595 is a high performance multi-channel audio CODEC with flexible input/output selection and digital and analogue volume control. Features include a 24-bit stereo ADC with digital gain control, two 24-bit DACs with independent volume control and clocking, and a range of input/output channel selection options with analogue volume control for flexible routing within current and future audio systems.

The WM8595 hasa six stereo input selector which accepts input levels up to 2Vrms. One stereo input can be selected through an input mux to be routed through to the ADC.

The WM8595 outputs two stereo audio channels at line levels up to 2Vrms, driven from independent DACs. The DAC channels include independent digital volume control, and both stereo output channels include analogue volume control with soft ramp.

The WM8595 supports up to 2Vrms analogue inputs, 2Vrms outputs, with sample rates from 32kHz to 192kHz on the DACs, and 32kHz to 96kHz on the ADC.

The WM8595 is controlled via a serial interface with support for 2-wire and 3-wire control with full readback. Control of mute, emergency shutdown and resetcan also be achieved
bypinselection.

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