Diodes Incorporated

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Automotive-compliant Adjustable 1.225V 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; it is also available in an adjustable version. The device is available in the small outline SOT23 surface mount package which is ideal for applications where space saving is important.
The fixed output version is available in 0.5% C grade and 1% D grade while the adjustable is only available in D grade. 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.
This device offers a pin for pin compatible alternative to the LM4041 voltage reference in both adjustable and 1.225V output variants for automotive applications.
The LM4041Q has been qualified to AEC-Q100 Grade 1 and is Automotive Grade supporting PPAPs.


  • No output capacitor required
  • Output voltage tolerance: LM4041CQ: ±0.5% at +25°C, LM4041DQ: ±1.0% at +25°C
  • Low output noise: 10Hz to 10kHz 20μVrms
  • Wide operating current range: 60μA to 12mA
  • Extended temperature range: -40°C to +125°C
  • Low temperature coefficient: 100ppm/°C (max)
  • Green Molding in small package SOT23
  • Totally Lead-Free & Fully RoHS Compliant 
  • Halogen and Antimony Free. “Green” Device 
  • Automotive Grade
  • Qualified to AEC-Q100 Standards for High Reliability
  • PPAP Capable 


  • Battery powered equipment
  • Precision power supplies

Product Specifications

Product Parameters

Type Shunt reference
Compliance (Only Automotive supports PPAP) Automotive
AEC Qualified Yes
ReferenceVoltage (V) 1.225 V
Tolerance (%) 0.5, 1 %
Sink Current (mA) 12 mA
Minimum Cathode Current for Regulation Typ (µA) 45 µA
Typical Temperature Coefficient (ppm/°C) 0, 20 ppm/°C
Maximum Slope Resistance (Ω) 0, 0.6 Ω
Noise Voltage (µV/Hz) 0, 20 µV/Hz
Operating Ambient Temperature Range (°C) -40 to 125 °C

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