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[FAQ] 【分享】音频CODEC和ADC:未使用的输入管脚连接方法


对于TI的音频ADC和CODEC上未使用的输入,建议通过~0.47uF电容接GND,以防止未端接输入上的噪声拾取。模拟输入具有直流偏置,因此不应直接接GND。~0.47uF电容为设备内部的直流偏压提供开路,但为正确端接和降低噪声提供交流对地短路。

本帖适用于TLV320ADC3100TLV320ADC3101TLV320ADC3001,TLV320AIC3203, TLV320AIC3253TLV320AIC3204TLV320AIC3254TLV320AIC3206TLV320AIC3256,TLV320AIC36, TLV320AIC3100TLV320AIC3101TLV320AIC3104TLV320AIC3105TLV320AIC3106TLV320AIC3107,TLV320AIC3109, TLV320AIC3110TLV320AIC3111TLV320AIC3120TLV320AIC3212TLV320AIC3262TLV320AIC3263 and TLV320AIC3268