Diodes Incorporated

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ZXRE1004 (Not Recommended for new design)

NRND = Not Recommended for New Design

Low knee current 1.22V shunt reference

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The ZXRE1004 is a 1.22 volt bandgap reference circuit designed for ultra low current operation, typically 4µA. The device is available in a SOT23 surface mount package offering the ultimate in space and power saving. These features make the ZXRE1004 particularly suitable for portable and battery powered applications. SOT23 tolerance selection is available to 0.5% for precision applications. Excellent performance is maintained over the 8µA to 20mA 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. As well as the SOT23, the ZXRE1004 can offer a pin for pin compatible alternative to the REF1004, LT1004 and LM185/385 series of voltage references with an E-Line (TO92 style) equivalent.


  • High performance alternative to REF1004, LT1004 and LM185/385 references
  • 4μA typical knee current
  • Small outline SOT23 package
  • E-Line alternative available
  • 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

    Accuracy (%) 1
    Compliance (Only Automotive supports PPAP) No
    Compliance (Only Automotive supports PPAP) Standard
    MaximumInput Voltage (V) -
    Maximum Slope Resistance (Ω) 0.6
    Minimum Cathode Current for Regulation Typ (µA) 4
    Noise Voltage (µV/Hz) 60
    Operating Ambient Temperature Range (°C) -40 to 85
    Operating Ambient Temperature Range (°C) -40 to 125
    AEC Qualified No
    ReferenceVoltage (V) 1.22
    Sink Current (mA) 20
    Tolerance (%) 1
    Type Shunt reference
    Typical Temperature Coefficient (ppm/°C) 20

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    Technical Documents

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    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)