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达到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.本文介绍WM8783主要特性,方框图, 外接元件框图以及评估板WM8783-6252-D8-EV1详细电路图和所用材料清单.
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主要特性:
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.WM8783方框图
图2.WM8783推荐的外接元件框图
评估板WM8783-6252-D8-EV1
图3.评估板WM8783-6252-D8-EV1主电路图
图4.评估板WM8783-6252-D8-EV1S/PDIF接口电路图
图5.评估板WM8783-6252-D8-EV1MCLK分频电路图
图6.评估板WM8783-6252-D8-EV1WM8783电路图
图7.评估板WM8783-6252-D8-EV1无源线路输入电路图
图8.评估板WM8783-6252-D8-EV1电源电路图
评估板材料清单(BOM):
图9.评估板WM8783-6252-D8-EV1 PCB布局图
本文关键字：立体声 电子技术，电工技术 - 电子技术
