Thanks Jim! That certainly clarifies where the other "0.5x" comes from. With that in mind, given the ADC12DJ3200 's INA+ and INA- Terminal Voltage Range of +-1 V, that means that IN+ - INA- can maximally swing (+1 - -1) - (-1 - +1) = 4 Vpp > 3.112 Vpp from the LMH3401 , indicating no damage as you had stated. Three remaining follow on questions: 1) ADC12DJ3200 will not damage for signals < 4 Vpp, but the full scale is 800 mVpp. But does this clipping cause problems to the ADC? e.g. does it introduce memoried distortions? Or does ADC operation continue digitizing according to the ADC12DJ3200 data sheet performance immediately upon the differential input voltage falling within full scale? 2) In my design I want the average voltage presented to the LMH3401 inputs to be different. That's because V_IN+ is not symmetric, i.e. the voltage duty cycle is far from 50%. Does it cause problems in the amp to not have a balanced input? 3) If one connects the LMH3401 V_OUT+- directly to ADC12DJ3200 INA+- without 40 Ohm resistors on a board (trace length < lambda / 10) thus bypassing the 40 Ohm resistive loss, would the 0.55 voltage loss be improved to ~1 in practice?
↧