Hi all,
I'm worried this is going to be a completely trivial problem, but here I am.
I'm working with the LMP8602 in a current shunt monitoring application. We're breadboarding the circuit before we make PCBs to verify the design, and I can't seem to cause the LMP8602 to output an offset output voltage (i.e., 0V in differential = Vs/2 output). The amplifier appears to be working as expected otherwise: it behaves linearly with linear input within the range we've tested. But even if I tie the two differential inputs directly together, I get precisely 0 V out.
Here is the relevant portion of the circuit as it is breadboarded:
*Note: The schematic has one error: pins 8 and 5 are swapped (8 should be +IN, 5 should be OUT). The circuit is wired correctly on the breadboard.
I can probe directly to pin 7 of the device, and I measure +Vs there, as expected.
Any advice on what might be going wrong? Thanks in advance for your time.