WolfsonWM8783立体声96kHz模数转换方案

Wolfson 公司的WM8783是立体声低功耗96kHz取样的模数转换器(ADC),是高保真度音频ADC,SNR到达95dB,有两个模拟音频输入,I2S数字音频接口,取样频率从8kHz 到96kHz,主要用在LCD TV,STB和DVD刻录机.本京电港论坛文章先容WM8783主要特点,方框架图, 外接元件框架图以及评估板WM8783-6252-D8-EV1详细电路原理图纸和所用质料清单.

WM8783: Stereo Low Power 96kHz ADC

The WM8783 is a compact, low cost ADC designed for set-top boxes and DVD applications. Stereo analogue inputs accept 1Vrms line level inputs; the Hi-Fi ADCs output 24-bit stereo data on the I2S digital audio interface.Sample rates from 8kHz to 96kHz are supported; this is configured automatically according to the external master clock (MCLK) frequency.A power on reset (POR) circuit ensures correct start-up and shut-down. The device is held in reset when MCLK is not present, offering a low-power standby state.

The WM8783 is supplied in an 8-pin SOIC package.

WM8783主要特点:

Hi-fi audio ADC (95dB SNR -‘A’weighted)

2 analogue audio inputs

I2S digital audio interface - sample rates 8kHz to 96kHz

Automatic clocking configuration from MCLK and LRCLK

Integrated voltage reference circuits

8-pin SOIC package

WM8783应用:

LCD televisions

Set-top boxes (STB)

DVD recorders

图1{京电港论坛}.WM8783方框架图

图2{京电港论坛}.WM8783推荐的外接元件框架图
评估板WM8783-6252-D8-EV1

图3{京电港论坛}.评估板WM8783-6252-D8-EV1主电路原理图纸

图4{京电港论坛}.评估板WM8783-6252-D8-EV1S/PDIF接口电路原理图纸

图5{京电港论坛}.评估板WM8783-6252-D8-EV1MCLK分频电路原理图纸

图6{京电港论坛}.评估板WM8783-6252-D8-EV1WM8783电路原理图纸

图7{京电港论坛}.评估板WM8783-6252-D8-EV1无源线路输入电路原理图纸

图8{京电港论坛}.评估板WM8783-6252-D8-EV1电源电路原理图纸

评估板质料清单(BOM):



图9{京电港论坛}.评估板WM8783-6252-D8-EV1 PCB线路板结构图

详情请复制打开此衔接地址:
http://www.wolfsonmicro.com/uploads/documents/en/WM8783.pdf
和
http://www.wolfsonmicro.com/uploads/documents/en/WM8783_6252_D8_EV1_Schematic_Layout.pdf