I am looking at modifying my (defective) HP419A and Fluke 845A Null meters using the LTC2054 zero drift op amp. I am planning on using a single 4.2 V Lithium Ion battery to power them (no AC input required and may not include, TBD). The LTC2054 has a very low bias current of typically 1pA at room temp and the bias plots vs. temp show no appreciable increase until about 50C. Conceptually, it looks pretty straight forward and, based on my Fluke 887A modifications, likely will be very stable.
Since this is a very astute group, does anyone have any comments on the feasibility of this modification before I get too involved? Regards, Randy Evans _______________________________________________ volt-nuts mailing list -- volt-nuts@febo.com To unsubscribe, go to https://www.febo.com/cgi-bin/mailman/listinfo/volt-nuts and follow the instructions there.
