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The ZXCT1021 is a precision high-side current sense monitor. Using this type of device eliminates the need to disrupt the ground plane when sensing a load current. The ZXCT1021 provides a fixed gain of 10 for applications where minimal sense voltage is required. The very low offset voltage enables a typical accuracy of 3% for sense voltages of only 10mV, giving better tolerances for small sense resistors necessary at higher currents. The wide input voltage range of 20V down to as low as 2.5V make it suitable for a range of applications. With a minimum operating current of just 25μA, combined with its SOT25 package make it suitable for portable battery equipment too.


  • Battery chargers
  • Smart battery packs
  • DC motor control
  • Over current monitor
  • Power management
  • Level translating
  • Programmable current source


  • Accurate high-side current sensing
  • Output voltage scaling
  • 2.5V – 20V supply range
  • 25μA quiescent current
  • 1% typical accuracy
  • SOT25 package
  • Product Specifications

    Product Parameters

    Qualified to AECQ10x -
    Automotive Compliant PPAP -
    Minimum VCC/VB Supply Voltage 2.5 V
    Maximum VCC/VB Supply Voltage 20 V
    Minimum S+ Common-Mode Sense Voltage 2.5 V
    Maximum S+ Common-Mode Sense Voltage 20 V
    Maximum Output Voltage Vs- -1 V
    Maximum Sense Voltage 1.5 V
    Accuracy @ VSENSE =100mV - %
    Quiescent Current 25 µA
    Gain Output/VSENSE 25
    Bandwidth typ 1 MHz
    Operating Ambient Temperature Range -40 to 85 °C
    Special Features Simple Voltage Output Current Monitor

    Related Content


    Technical Documents

    Application Notes

    ICP Reports


    Evaluation Boards and User Guides

    Recommended Soldering Techniques

    RoHS CofC

    Orderable Part Number Authorized Distributor Quantity Inventory Date Buy Online Region
    ZXCT1021E5TA Avnet EU 999 2/22/2020 Buy Now Germany
    ZXCT1021E5TA Arrow Electronics 40 2/22/2020 Buy Now United States
    ZXCT1021E5TA Arrow Electronics Central EU 1997 2/22/2020 Buy Now Germany
    ZXCT1021E5TA Arrow Electronics Central EU 6000 2/22/2020 Buy Now Germany
    ZXCT1021E5TA Digi-Key Electronics 17171 2/22/2020 Buy Now United States
    ZXCT1021E5TA Farnell, An Avnet Company 1234 2/22/2020 Buy Now England
    ZXCT1021E5TA Mouser Electronics Inc. 3649 2/22/2020 Buy Now United States