Part Number:INA828
Hi,
I'm trying to use the INA828 as an input amplifier in a Thermal conductivity detector.
The inputs are to be connected to the corners of a wheatstone bridge driven by a current source.
The power supply to the device is +/- 15 volts.
The device is very close to the input connector. I've got 47Kohm resistors from each input to ground for the bias current canceling.
The gains that I am using are 3 to 24.
The problem that I am having on two different circuits is that i am seeing between .325 and .350 volts of offset when the input differential is zero volts.
Thanks in advanced.
Jim Gale
Wasson-ECE Instrumentation, Inc.