请教一下，更换全新的同型号AD7694板子检测通不过，换回原来AD7694的就可以，这是怎么回事呢，可以直接更换吗，谢谢
Dear all,
I use an AD7694 for reading from current amplifiert of an BLDC which is driven with 20khz PWM.
50% of readings from AD7694 are right and good but the other 50% give me very high velues.
Normal are results around 47000 digits but in case of wrong…
在使用Ad7694采集数据的时候，当输入电压比较大的时候输出数据的后四位就一直是F不会变了。换了新的片子也是一样。程序也改过，还是一样的后4位一直是F。用示波器sdo确定Ad9694输出的就是F。请发各位有没有遇到这样的问题。怎么解决呢？还是片子本身就是有这问题。
AD的精英们，我有问题需要解决，麻烦帮我看看 ！
电路目的：将陀螺仪的输出电压进行AD转换发送给ARM
陀螺仪：ADXRS610
AD芯片：AD7694
陀螺仪和AD芯片的基准电压源：REF195
运放：AD8031
电路图如下：
其中AD7694的2号脚接入陀螺仪的输出信号（之间有AD8031运放连接），我按照AD7694的时序进行读取，为什么读取的数值一直是0呢？
我电路有问题导致采集到的就是0V？可是我用电压表测了AD7694的输入引脚电压的确有2.5v左右（陀螺仪不动输出信号就是2…
从事汽车应用相关领域，用的ADI的运放很多，AD8619， AD7694
Dear Karen
Thank you very much for your advice.
But in your case, the system side needs to use a higher clock.
Then total system power might be increase.
AD7680 clock stretch:
It will work, but the performance might be degread.
AD7694 CNV …
Thank you for replies.
As I see in data sheet ADC with pseudo-differerential input couldn`t convert voltage below GND.
For example AD7694. -IN should be connected to GND, and +IN should be between GND and VREF.
So I can't convert negative voltage…
Thank you for the quick reply. Please let me clarify my previous statements.
I am working on revamping a control circuit. Previously everything was done in parallel. I am converting to a serial design to decrease wiring. My main goal is to match the…