SIVA_407

Differential amplifier drift at output

Discussion created by SIVA_407 on Apr 3, 2018
Latest reply on May 22, 2018 by Emman.A

Hi,

 

In our design we are using differential amplifier( AD629BRZ) but it is behaving some what different.

 

my application is measuring current,for your reference i am adding schematics

 

<https://ez.analog.com/servlet/JiveServlet/showImage/2-342928-60803/pastedImage_5.png>

 

my current is 48mA

 

I have measured voltage across the resistor is 4.8mV,but output of differential amplifier is 4.4mV,there is a drift of 0.4mV

 

why this much of variation in input and output?

 

I want exact  input voltage in output what i will do ,can you please guide how to resolve this issue

 

Thanks in advance..

 

 

 

 

Thanks,

Siva Nageswara Rao

Mobile: +91 9030346190

 

 

Attachments

Outcomes