I believe you are considering buffers for isolation of the signal sources to the ADC. May I know the output impedance of your signal sources? According to the AD7896 datasheet, the AD7896 allows a maximum of 1kΩ output impedance driving the…
对于ADC 12bit 8pin脚的产品，您可以考虑AD7893、AD7895（但是这两款都是外部参考）；AD7896是内部参考。
In my design, I'm using a 12-bit ADC with SPI communication output (AD7896). Beforethat, I'm using Single 16-to-1 Multiplexer (ADG707). I'm measuring 0-5V slow changeDC levels.
My question is should I use an op amplifier with gain 1…