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output noise of AD8421ARZ

Category: Hardware
Product Number: AD8421

as shown as the picture above, I connect the vin+ with vin-  and power is ±5V, gain is 80. But the noise is about 10mV from oscilloscope.How can I reduce the noise?


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  • Hi Franz,

    I am so sorry. My previous description is wrong. In fact, I use two AD8421 to get two stage of amplifier. the Gain of first  stage is 80 and second stage is 50. The test circuit of first stage is  shown as the picture in my question and its output is connected with the VIN+ of the second stage. And the VIN- of the second stage  is connected with GND. I found that approximately 10mv noise is generated on the power supply pin.