Product details

VO (V) 2.5, 3 Reference voltage Fixed Initial accuracy (Max) (%) 0.1, 0.2, 0.5, 1, 2 VO adj (Min) (V) 2.048 VO adj (Max) (V) 3 Iz for regulation (Min) (uA) 60, 60, 62, 68, 74, 91, 100 Rating Automotive TI functional safety category Functional Safety-Capable Temp coeff (Max) (ppm/ degree C) 100, 150 Operating temperature range (C) -40 to 125 Iout/Iz (Max) (mA) 15
VO (V) 2.5, 3 Reference voltage Fixed Initial accuracy (Max) (%) 0.1, 0.2, 0.5, 1, 2 VO adj (Min) (V) 2.048 VO adj (Max) (V) 3 Iz for regulation (Min) (uA) 60, 60, 62, 68, 74, 91, 100 Rating Automotive TI functional safety category Functional Safety-Capable Temp coeff (Max) (ppm/ degree C) 100, 150 Operating temperature range (C) -40 to 125 Iout/Iz (Max) (mA) 15
SOT-23 (DBZ) 3 7 mm² 2.92 x 2.37
  • SOT-23 AEC Q-100 Grades 1 and 3 available
  • Small Packages: SOT-23, TO-92, and SC70
  • No Output Capacitor Required
  • Tolerates Capacitive Loads
  • Fixed Reverse Breakdown Voltages of 2.048 V,
    2.5 V, 3 V, 4.096 V, 5 V, 8.192 V, and 10 V
  • Key Specifications (2.5-V LM4040-N)
    • Output Voltage Tolerance (A Grade,
      25°C): ±0.1% (Maximum)
    • Low Output Noise (10 Hz to 10 kHz):
      35 µVrms (Typical)
    • Wide Operating Current Range: 60 µA
      to 15 mA
    • Industrial Temperature Range: –40°C
      to 85°C
    • Extended Temperature Range: –40°C
      to 125°C
    • Low Temperature Coefficient: 100 ppm/°C
      (Maximum)
  • SOT-23 AEC Q-100 Grades 1 and 3 available
  • Small Packages: SOT-23, TO-92, and SC70
  • No Output Capacitor Required
  • Tolerates Capacitive Loads
  • Fixed Reverse Breakdown Voltages of 2.048 V,
    2.5 V, 3 V, 4.096 V, 5 V, 8.192 V, and 10 V
  • Key Specifications (2.5-V LM4040-N)
    • Output Voltage Tolerance (A Grade,
      25°C): ±0.1% (Maximum)
    • Low Output Noise (10 Hz to 10 kHz):
      35 µVrms (Typical)
    • Wide Operating Current Range: 60 µA
      to 15 mA
    • Industrial Temperature Range: –40°C
      to 85°C
    • Extended Temperature Range: –40°C
      to 125°C
    • Low Temperature Coefficient: 100 ppm/°C
      (Maximum)

Ideal for space-critical applications, the LM4040-N precision voltage reference is available in the sub-miniature SC70 and SOT-23 surface-mount package. The advanced design of the LM4040-N eliminates the need for an external stabilizing capacitor while ensuring stability with any capacitive load, thus making the LM4040-N easy to use. Further reducing design effort is the availability of several fixed reverse breakdown voltages: 2.048 V, 2.5 V, 3 V, 4.096 V, 5 V, 8.192 V, and 10 V. The minimum operating current increases from 60 µA for the 2.5-V LM4040-N to 100 µA for the 10-V LM4040-N. All versions have a maximum operating current of 15 mA.

The LM4040-N uses a fuse and Zener-zap reverse breakdown voltage trim during wafer sort to ensure that the prime parts have an accuracy of better than ±0.1% (A grade) at 25°C. Bandgap reference temperature drift curvature correction and low dynamic impedance ensure stable reverse breakdown voltage accuracy over a wide range of operating temperatures and currents.

Also available is the LM4041-N with two reverse breakdown voltage versions: adjustable and 1.2 V. See the LM4041-N data sheet (SNOS641).

Ideal for space-critical applications, the LM4040-N precision voltage reference is available in the sub-miniature SC70 and SOT-23 surface-mount package. The advanced design of the LM4040-N eliminates the need for an external stabilizing capacitor while ensuring stability with any capacitive load, thus making the LM4040-N easy to use. Further reducing design effort is the availability of several fixed reverse breakdown voltages: 2.048 V, 2.5 V, 3 V, 4.096 V, 5 V, 8.192 V, and 10 V. The minimum operating current increases from 60 µA for the 2.5-V LM4040-N to 100 µA for the 10-V LM4040-N. All versions have a maximum operating current of 15 mA.

The LM4040-N uses a fuse and Zener-zap reverse breakdown voltage trim during wafer sort to ensure that the prime parts have an accuracy of better than ±0.1% (A grade) at 25°C. Bandgap reference temperature drift curvature correction and low dynamic impedance ensure stable reverse breakdown voltage accuracy over a wide range of operating temperatures and currents.

Also available is the LM4041-N with two reverse breakdown voltage versions: adjustable and 1.2 V. See the LM4041-N data sheet (SNOS641).

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Technical documentation

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View all 6
Type Title Date
* Data sheet LM4040-N/-Q1 Precision Micropower Shunt Voltage Reference datasheet (Rev. K) 02 Jun 2016
Functional safety information LM4040-N-Q1 Functional Safety FIT Rate and Failure Mode Distribution 18 Dec 2019
E-book Voltage Supervisor and Reset ICs: Tips, Tricks and Basics 28 Jun 2019
Technical article How to use a voltage reference as a voltage regulator 04 Dec 2018
Application note AN-1525 Single Supply Operation of the DAC0800 and DAC0802 (Rev. A) 22 Apr 2013
Application note Negative Buck Switching Regulator (using LM258x) 21 Mar 2007

Design & development

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LM4040_NB2P048 PSpice Transient Model

SNOM393.ZIP (25 KB) - PSpice Model
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LM4040_NA2P048 PSpice Transient Model

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SNOM447.TSC (73 KB) - TINA-TI Reference Design
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SNOM448.ZIP (9 KB) - TINA-TI Spice Model
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SNOM456.ZIP (9 KB) - TINA-TI Spice Model
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SOT-23 (DBZ) 3 View options

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