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ADA4870 insufficient gain.

Question asked by zoulzubazz on Mar 3, 2015
Latest reply on Mar 24, 2015 by zoulzubazz

ADA4807_inp1.jpg

 

hello,

 

I have connected the ADA4870 in a configuration (as shown in picture) very similar to the evaluation board presented in figure 5 here

http://www.analog.com/media/en/technical-documentation/evaluation-documentation/EVAL-ADA4870_UG-685.pdf

 

the amp in connected as an non-inverting amplifier set for a gain of 5 (have tried gain of 10 too) but the setup is unable to provide a gain greater than one. The supply is +-17V and the input is 2Vp-p. A clean sinusoid is reproduced but not at the level of gain required. Could someone please shed some light on what could be wrong. Thanks very much.

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