Anthony, The common mode range is the range of common mode voltages for which the CMRR specification is valid. If you are overdriveing the comparators differential input, this parameter is less important. For example, if the common mode input range is +/- 10V and the CMRR is
80dB, then a 10V common mode input can cause the input threshold to vary by 0.1 mV. If you are trying to detect a 1 mV differential in the presence of 10V Common mode, this may be significant. Regards,, Jon- Vote on answer
- posted
18 years ago