Hello. I've identified LT1886 as a suitable op-amp to act as a amplifier for a function generator, which I am hoping to use as the power supply to test the PSR of my DUT. The key feature being the 200mA output current. The application is that I want to test how my DUT performs with a 3V DC and a 300kHz 500mV peak to peak ripple AC on top of it, which I can get from the function generator. The spice simulation looks good but the first board did not perform as expected. The DC and the ripple are at least 10x smaller then what they should be. The AC frequency comes out right. In the schematic I have connected OUT A with -IN A. +IN A goes directly to the function generator. V- goes to ground and V+ goes to 6V lab supply. I am not using the B amp at all. Any idea what could be wrong? Thanks for any help in advance.
