The AD694, a complete monolithic current transmitter, accepts high-level inputs and directly drives a single-ended 0- or 4-to-20-mA current loop. Included on-chip is an uncommitted buffer amplifier, a precision 2- or 10-volt programmable reference, a current-output driver with 4-mA offset, and an alarm circuit that detects an open 4-to-20-mA loop. Read full article
