Now that the current measurement is single-ended, I should be able to directly connect the sense to ADC input pin. I was only using the op-amp because my sense resistor was on high side and needed difference amplifier. Chetan Bhargava http://microz.blogspot.com --=20 http://www.piclist.com PIC/SX FAQ & list archive View/change your membership options at http://mailman.mit.edu/mailman/listinfo/piclist .