M694

The M694 is an M377, just with a more relaxed specification for DC balance. An M377 that doesn't quite meet its DC balance spec can be a fully acceptable M694. This was used as a cost-cutting technique for applications that don't require tight DC balance. The M694 is used in the AM503A and the AM503B. The dual channel current probe amplifier plug in 11A16 uses the M377.