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Low temperature-coefficient shunt refernce

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The ZRT040 is a monolithic integrated circuit providing a precise stable reference voltage of 4.01V at 500μA. The circuit features a knee current of 150μA and operation over a wide range of temperatures and currents. The ZRT040 is available in a SOT223 package for surface mount applications. This device offers a trim facility whereby the output voltage can be adjusted as shown in the schematic diagram. This facility is used when compensating for system errors or setting the reference output to a particular value. When the trim facility is not used, the pin should be left open circuit.


  • Trimmable output
  • Excellent temperature stability
  • Low output noise figure
  • Available in three temperature ranges
  • 1% initial voltage tolerance
  • No external stabilising capacitor required in most cases
  • Low slope resistance
  • SOT223 small outline packages
  • Product Specifications

    Product Parameters

    Compliance (Only Automotive supports PPAP) Standard
    AEC Qualified No
    ReferenceVoltage (V) 4.01 V
    Accuracy (%) 1 %
    MaximumInput Voltage (V) - V
    Sink Current (mA) 75 mA
    Minimum Cathode Current for Regulation Typ (µA) 150 µA
    Typical Temperature Coefficient (ppm/°C) 2.5 ppm/°C
    Maximum Slope Resistance (Ω) 3 Ω
    Noise Voltage (µV/Hz) 50 µV/Hz
    Operating Ambient Temperature Range (°C) -40 to 85 °C

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    Orderable Part Number Buy from Distributor / Contact Sales Request Samples


    Authorized Distributor Quantity Inventory Date Countries/Regions Buy Online
    Digi-Key Electronics 4854 10/3/2022 Europe, Asia, North America Buy Now
    Farnell, An Avnet Company 1659 10/3/2022 England Buy Now
    Mouser Electronics Inc. 1535 10/3/2022 South America, North America, Asia, Europe, Middle East Buy Now
    Micronetics GmbH 200 9/26/2022 Germany Contact Sales
    Request Sample