'The Common Mode Voltage is +/-11V maximum (operational).  With a 60Hz +/-11V input on both sides of the differential inputs, with 1K in series with 1 side the Common Mode Rejection Ratio in -74dB.  22VPP input = 4.4millivolts pp on the output.  This specification is important in high power line noise applications.  *Created: 12/10/03