Hey Emman,
Yea this may have been a little hard to follow.
My circuit:
-Are you getting your input signal from a wheatstone bridge with an excitation voltage of 3.3 V?
yes
-Does the inputs of the AD8237 are AC coupled?
yes
-If yes, are you planning to apply bias on pin 2 and pin 3?
yes
-If yes, are you planning to apply bias on pin 2 and pin 3?
yes. I have two 100k pull-downs
-What is the supply voltage of the AD8237?
3.3Vdc
-What is your expected differential input voltage ( Vin+ - Vin-)?
For the main sensor I'm targeting for this application -> 30mV
Vref is tied to GND
The gain is 100 max.
I'll be honest...I"m not really familiar with those plots. I'm a digital guy so I'm not great in the analog world. Would it be easier if I sent you a pdf of my whole filter/gain/amp schematic that I'm planning on implementing in my product? I will be using one of these circuits PER channel on my data acquisition device. If you give me a contact ponit (email) I can send you the pdf with all the detail so you can check it out. I just don't want to post up the design on here.
As for the circuit it is differential, but I can't recreate the sensor output so I was trying to tie the neg. pin to GND and put a signal on the pos. pin just to get a ROUGH idea of whether it works or the design is just totally wrong. So far it looks great. I'll be honest. I've got a 3 stage circuit and I tested out the whole thing this morning and my cut-off frequency is -3db down, signal looks clean. I'm very excited!
But yes, long story short I was trying to lab test a differential amp in a single ended "way".