Diodes ZXCT199 Current Monitors - Header
Diodes Incorporated

Bidirectional current monitors provide accurate measurement at low BoM cost

The DIODES ZXCT199 series features low offset voltage and zero drift

Diodes Incorporated has introduced a series of bidirectional current monitors which accurately measure very low sense voltages across a wide range of common-mode voltages.


The new DIODES™ ZXCT199 series features a low offset voltage and zero drift, enabling it to sense large currents with maximum full-scale drops across the shunt of as little as 10 mV. This allows high currents to be measured with the use of an inexpensive, low-value shunt resistor.


Consisting of nine variants, the ZXCT199 series current monitors feature a precision chopper-stabilized operational amplifier for accurate operation.


The ZXCT199 current monitors produce a voltage output, and are available in three fixed voltage-gain options:

  • ZXCT199x1: 50 V/V
  • ZXCT199x2: 100 V/V
  • ZXCT199x3: 200 V/V


The devices show minimal drift of 0.5 µV/°C across the operating-temperature range of -40°C to 125°C. For the versions marked A and B, the maximum gain error over temperature is ±1.0%, while for the C version, it is ±0.8%. 


The ZXCT199 products can measure voltages across shunts at common-mode voltages ranging between -0.1 V and 26 V, independent of the supply voltage.


  • Supply-voltage range: 2.7 V to 26 V
  • Maximum offset voltage:
    • A version: ±150 μV
    • B version: ±100 μV
    • C version: ±80 μV
  • Rail-to-rail output capability
  • 100 μA maximum supply current


  • High- and low-side current sensing, including for short circuits
  • Industrial equipment
  • Power-management devices
  • Instrumentation
  • Control systems
  • Motor drives
  • Battery management systems
  • Large-scale computing
  • Computer racks
  • Server farms
  • High-performance video cards
Diodes ZXCT199 Current Monitor Device

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