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.Ā 

The ZXCT21xā€™s low offset voltage of 30 Ī¼V and high temperature stability, with drift of just 100 nV/ĀŗC, 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.Ā 

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 Ī¼A.

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