Diodes Incorporated

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Adjustable 1.2V shunt reference

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The LM4041 is a bandgap circuit designed to achieve a precision micro-power voltage reference of 1.225 V. The device is available in the small outline SOT23 surface mount packages which is ideal for applications where space saving is important. The LM4041 is available to 0.5% C grade for precision applications. Excellent performance is maintained over the 60μA 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. These devices offer pin for pin compatible alternatives to other LM4041 voltage references.


  • Small packages: SOT23 and SC70-5
  • No Output capacitor required
  • Output voltage tolerance
  • LM4041C ±0.5% at 25°C
  • LM4041D ±1% at 25°C
  • Low output noise
  • (10 Hz to 10kHz) 20μVRMS
  • Wide operating current range 60μA to 12mA
  • Extended temperature range -40°C to +125°C
  • Low temperature coefficient……….. 100ppm/°C (max)


  • Battery powered equipment
  • Precision power supplies
  • Portable instrumentation
  • Portable communications devices
  • Notebook and palmtop computers
  • Data acquisition systems

Product Specifications

Product Parameters

Type Shunt reference
Compliance (Only Automotive supports PPAP) Standard
AEC Qualified No
ReferenceVoltage (V) 1.233 V
Tolerance (%) 1 %
Maximum Input Voltage (V) 10 V
Sink Current (mA) 12 mA
Minimum Cathode Current for Regulation Typ (µA) 45 µA
Typical Temperature Coefficient (ppm/°C) 15 ppm/°C
Maximum Slope Resistance (Ω) 0.6 Ω
Noise Voltage (µV/Hz) 20 µV/Hz
Operating Ambient Temperature Range (°C) -40 to 125 °C

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