AnsweredAssumed Answered

AD630 Unity gain error?

Question asked by Gerry1 on Oct 5, 2014
Latest reply on Oct 6, 2014 by Gerry1

Hi

I'm using AD630 (JN grade) as a +1/-1 gain amplifier to take advantage of the precise gain. However with an input of 8.06VDC (low impedance source) I'm getting output values of 8.20 and -7.48VDC in the two gain states.

 

I'm using AD630 connections as for the lower device in AN308 (http://www.analog.com/static/imported-files/application_notes/AN-308.pdf)

Supply voltage is +/-15 VDC. Supply voltage is clean.

 

I've checked all the connections carefully but I can't find the source of the gain error. Any advice greatly appreicated.

 

thanks


Gerry

Outcomes