Current and voltage measuring with AMC1301

Thread Starter

Tamás Fegyvári

Joined Sep 26, 2017
15
Hi
I would like to measure voltage an current on a ~550V DC bus with AMC1301 ICs. I don't really understand why it is necessary to put in the R82-83 resistors. (It's not my image.)
A saw circuits without them and with 1M.
Could you tell what is it for?

Thank you!
AMC.JPG
 

farhanbeg

Joined Feb 12, 2018
1
Hi Tamas,

A quick read through the datasheet revealed the obvious. The resistors R82 and R83 in conjunction with C81 form a low pass RC filter to reduce the noise entering the input pins.

Farhan
 
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