Could someone tell me why there is voltage on output + pin when there is no signal into the TIAmp. I am new to this circuitry stuff but I would assume that if there is no input hooked up to the TIAmp that the output + should have a low voltage (close to zero). Output + needs to match up with the A/D converter range of 0-3.3V computing to a range of 0-1023 numerically. The output + pin currently has a voltage of 2.994V which means I have a input signal range of ~0.4V which will not work for our fluorescence sensor that I am developing. Are there ways around this or do I need to buy a different TIAmp?