Dear Sir/Madam,

We are designing with your ADC AD9432 for our product.

So I have a  question.

As for your datahseet page.15 Fig-29 my enclosed, I can see the matching resister and capacitor between AD8132 amp and AD9432 AIN and AIN/.

1) 50ohm and 22pF…

       目前我们希望使用该AD采集芯片采集外部晶振的频率信号，但是只需要采集若干周期进行分析即可，所以希望通过程序或者外部电路来实现这个功能，希望解疑答惑。