Using The ADA4177-2 as a buffer, outputs don't exactly follow inputs

Question

Hello, 
 I just took over an amplifying circuit board on which the last stage is a buffer circuit with ADA4177-2 for two signals. My problem is, there always exists a difference of 0.07V between the buffer input and output. My current input signal is around 1.1V~1.5V. The power supply is V+ = 2.5V and V- = -0.2V, not symmetrical. I am wondering if this is the reason for the deviation? 
 Many thanks in advance!

harrynsc · Accepted Answer

I'm surprised it is doing anything. 
 -- You need at least 5V across the part to wake it up 
 -- It is not RR input; you need to stay at least 1.5V away from either rail. 
 Try an ADA4084-2 or an ADA4528-2 
 
 For the LMC662,, you could also look at: 
 ADA4691-2, ADA4666-2, AD8607, AD8617, or ADA4692-2 
 Harry)

Partner Forums

Partner Libraries

Products Mentioned

Using The ADA4177-2 as a buffer, outputs don't exactly follow inputs