Bidirectional current monitors support accurate high- and low-side current measurement
Diodes Incorporated ZXCT21x current monitoring sensors minimize power losses and provide highly stable operation over a wide temperature range, giving accurate measurements in motors and power supplies.
The new ZXCT21x series of current monitors from Diodes Incorporated are single-stage instrumentation amplifiers which accurately measure very low sensor voltages across a wide range of common-mode voltages up to 26 V.
The ZXCT21x’s low offset voltage of 30 μV and high temperature stability, with drift of just 100 nV/ºC, enable these monitors to achieve high-precision current sensing with low-resistance sense resistors, even when monitoring large currents. This results in low power losses attributable to the measurement circuit.
The ZXCT21x series is available in versions with a choice of six fixed voltage-gain options: 50 V/V, 75 V/V, 100 V/V, 200 V/V, 500 V/V, and 1,000 V/V. The current monitors measure voltage across the shunt resistor at common-mode voltages from -0.3 V to 26 V, independent of supply voltage. Operation is from a supply-voltage range of 2.7 V to 26 V; supply current is a maximum of 100 μA.