Diodes Incorporated

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1.225V shunt reference

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The ZXRE4041 is a bandgap circuit designed to achieve a precision micropower voltage reference of 1.225 volts. The device is available in the small outline SOT23 surface mount package which is ideal for applications where space saving is important. SOT23 tolerance is available to 0.5% C grade for precision applications. Excellent performance is maintained over the 30μA to 12mA operating current range with a typical temperature coefficient of only 20ppm/°C. The device has been designed to be highly tolerant of capacitive loads so maintaining excellent stability. This device offers a SOT23 pin for pin compatible alternative to LM4041 voltage references.


  • High performance alternative to LM4041
  • Small outline SOT23
  • 30μA knee current
  • 20ppm/°C typical temperature coefficient
  • Unconditionally stable
  • 0.5%, 1%, 2% and 3% tolerance
  • Application(s)

  • Battery powered equipment
  • Precision power supplies
  • Portable instrumentation
  • Portable communications devices
  • Notebook and palmtop computers
  • Data acquisition systems
  • A/D and D/A converters
  • Test equipment
  • Product Specifications

    Product Parameters

    Type Shunt reference
    Compliance (Only Automotive supports PPAP) Standard
    AEC Qualified No
    ReferenceVoltage (V) 1.225 V
    Tolerance (%) 2, 1, 0.5 %
    Sink Current (mA) 12 mA
    Minimum Cathode Current for Regulation Typ (µA) 30 µA
    Typical Temperature Coefficient (ppm/°C) 20 ppm/°C
    Maximum Slope Resistance (Ω) 0.92 Ω
    Noise Voltage (µV/Hz) 60 µV/Hz
    Operating Ambient Temperature Range (°C) -40 to 125 °C

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