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Product details

Parameters

VO (V) 2.5, 3 Reference voltage Fixed Initial accuracy (Max) (%) 0.1, 0.2, 0.5, 1, 2 Rating Automotive VO adj (Min) (V) 2.048 VO adj (Max) (V) 3 Iz for regulation (Min) (uA) 60, 60, 62, 68, 74, 91, 100 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 open-in-new Find other Shunt voltage references

Package | Pins | Size

SOT-23 (DBZ) 3 7 mm² 2.92 x 2.37 open-in-new Find other Shunt voltage references

Features

  • 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)
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Description

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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Exact equivalent in functionality and parametrics to the compared device:
LM4050-N-Q1 ACTIVE Automotive, 50-ppm/°C precision micropower shunt voltage reference LM4050-N-Q1 offers fixed voltage option at higher initial accuracy and much lower 50 ppm/°C temperature drift.

Technical documentation

= Top documentation for this product selected by TI
No results found. Please clear your search and try again. View all 6
Type Title Date
* Datasheet LM4040-N/-Q1 Precision Micropower Shunt Voltage Reference datasheet (Rev. K) Jun. 02, 2016
Application notes LM4040-N-Q1 Functional Safety FIT Rate and Failure Mode Distribution Dec. 18, 2019
White papers Voltage Supervisor and Reset ICs: Tips, Tricks and Basics Jun. 28, 2019
Technical articles How to use a voltage reference as a voltage regulator Dec. 03, 2018
Application notes AN-1525 Single Supply Operation of the DAC0800 and DAC0802 (Rev. A) Apr. 22, 2013
Application notes Negative Buck Switching Regulator (using LM258x) Mar. 21, 2007

Design & development

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CALCULATION TOOLS Download
Shunt voltage reference external resistor quick-start calculator
SHUNT_VOLTAGE_REFERENCE_RESISTOR_CALCULATOR This external resistor quick-start calculator tool lets you easily calculate valid external resistor values relative to voltage reference, supply and load-current bounds. With these inputs, you can instantly view the resulting calculations and use the color-coded indications to understand (...)
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SOT-23 (DBZ) 3 View options

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