Diodes Incorporated
Back to Voltage References


Low temperature-coefficient shunt refernce

Contact Sales

Log in or register to manage email notifications about changes to datasheets or PCNs for this part.


The ZRT050 is a monolithic integrated circuit providing a precise stable reference voltage of 4.9V at 500μA. The circuit features a knee current of 150μA and operation over a wide range of temperatures and currents. The ZRT050 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 two temperature ranges
  • 1% initial voltage tolerance
  • No external stabilizing capacitor required in most cases
  • Low slope resistance
  • SOT223 small outline package
  • Product Specifications

    Product Parameters

    Type Shunt reference
    Compliance (Only Automotive supports PPAP) Standard
    AEC Qualified No
    ReferenceVoltage (V) 4.9 V
    Tolerance (%) 1 %
    Sink Current (mA) 60 mA
    Minimum Cathode Current for Regulation Typ (µA) 150 µA
    Typical Temperature Coefficient (ppm/°C) 2.5 ppm/°C
    Maximum Slope Resistance (Ω) 2 Ω
    Noise Voltage (µV/Hz) 50 µV/Hz
    Operating Ambient Temperature Range (°C) -40 to 85 °C

    Related Content


    Technical Documents

    ICP Reports

    Recommended Soldering Techniques


    Product Change Notices (PCNs)

    A PCN may only apply to specific orderable part numbers in this datasheet. Please refer to the corresponding PCN to see the exact orderable part number(s) affected.

    PCN # Issue Date Implementation Date Subject
    PCN-2642 2023-09-05 2024-03-05 Device End of Life (EOL)