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Shunt voltage references

LM4040

ACTIVE

Fixed voltage, 45-µA, precision micropower shunt voltage reference

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Data sheet

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LM4050-N ACTIVE 50-ppm/°C precision micropower shunt voltage reference High accuracy

LM4040

ACTIVE
Data sheet Order now

Product details

VO (V) 2.048, 2.5, 3, 4.096, 5, 8.192, 10 Initial accuracy (max) (%) 0.1, 0.2, 0.5, 1 VO adj (min) (V) 2.048 VO adj (max) (V) 10 Iz for regulation (min) (µA) 45 Reference voltage (V) Fixed Rating Catalog Temp coeff (max) (ppm/°C) 150 Operating temperature range (°C) -40 to 125 Iout/Iz (max) (mA) 15
VO (V) 2.048, 2.5, 3, 4.096, 5, 8.192, 10 Initial accuracy (max) (%) 0.1, 0.2, 0.5, 1 VO adj (min) (V) 2.048 VO adj (max) (V) 10 Iz for regulation (min) (µA) 45 Reference voltage (V) Fixed Rating Catalog Temp coeff (max) (ppm/°C) 150 Operating temperature range (°C) -40 to 125 Iout/Iz (max) (mA) 15
SOT-23 (DBZ) 3 6.9204 mm² 2.92 x 2.37 SOT-SC70 (DCK) 5 4.2 mm² 2 x 2.1 TO-92 (LP) 3 19.136 mm² 5.2 x 3.68
  • Fixed output voltages of 2.048V, 2.5V, 3V, 4.096V, 5V, 8.192V, and 10V
  • Tight output tolerances and low temperature coefficient
    • Maximum 0.1%, 100ppm/°C – A Grade
    • Maximum 0.2%, 100ppm/°C – B Grade
    • Maximum 0.5%, 100ppm/°C – C Grade
    • Maximum 1.0%, 150ppm/°C – D Grade
  • Low output noise: 35µVRMS typical
  • Wide operating current range: 45µA typical to 15mA
  • Stable with all capacitive loads; no output capacitor required
  • Available in extended temperature range: –40°C to 125°C
  • Fixed output voltages of 2.048V, 2.5V, 3V, 4.096V, 5V, 8.192V, and 10V
  • Tight output tolerances and low temperature coefficient
    • Maximum 0.1%, 100ppm/°C – A Grade
    • Maximum 0.2%, 100ppm/°C – B Grade
    • Maximum 0.5%, 100ppm/°C – C Grade
    • Maximum 1.0%, 150ppm/°C – D Grade
  • Low output noise: 35µVRMS typical
  • Wide operating current range: 45µA typical to 15mA
  • Stable with all capacitive loads; no output capacitor required
  • Available in extended temperature range: –40°C to 125°C

The LM4040 series of shunt voltage references are versatile, easy-to-use references that cater to a vast array of applications. The 2-pin fixed-output device requires no external capacitors for operation and is stable with all capacitive loads. Additionally, the reference offers low dynamic impedance, low noise, and low temperature coefficient to maintain a stable output voltage over a wide range of operating currents and temperatures. The LM4040 uses fuse and Zener-zap reverse breakdown voltage trim during wafer sort to offer four output voltage tolerances, ranging from 0.1% (maximum) for the A grade to 1% (maximum) for the D grade. Thus, a great deal of flexibility is offered to designers in choosing the best cost-to-performance ratio for their applications.

Packaged in space-saving SC-70 and SOT-23-3 packages and requiring a minimum current of 45µA (typical), the LM4040 also is ideal for portable applications. The LM4040xI is characterized for operation over an ambient temperature range of –40°C to 85°C. The LM4040xQ is characterized for operation over an ambient temperature range of –40°C to 125°C.

The LM4040 series of shunt voltage references are versatile, easy-to-use references that cater to a vast array of applications. The 2-pin fixed-output device requires no external capacitors for operation and is stable with all capacitive loads. Additionally, the reference offers low dynamic impedance, low noise, and low temperature coefficient to maintain a stable output voltage over a wide range of operating currents and temperatures. The LM4040 uses fuse and Zener-zap reverse breakdown voltage trim during wafer sort to offer four output voltage tolerances, ranging from 0.1% (maximum) for the A grade to 1% (maximum) for the D grade. Thus, a great deal of flexibility is offered to designers in choosing the best cost-to-performance ratio for their applications.

Packaged in space-saving SC-70 and SOT-23-3 packages and requiring a minimum current of 45µA (typical), the LM4040 also is ideal for portable applications. The LM4040xI is characterized for operation over an ambient temperature range of –40°C to 85°C. The LM4040xQ is characterized for operation over an ambient temperature range of –40°C to 125°C.
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Type Title Date
* Data sheet LM4040 Precision Micropower Shunt Voltage Reference datasheet (Rev. O) PDF | HTML 28 Jun 2024
Application brief Using Voltage Supervisors in High Voltage Applications (Rev. B) PDF | HTML 20 Feb 2023
E-book Tips and tricks for designing with voltage references (Rev. A) 07 May 2021
White paper Simplifying Signal Chain Design for High Performance in Small Systems 22 Oct 2020
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 PDF | HTML 04 Dec 2018
White paper Voltage reference selection basics white paper (Rev. A) 23 Oct 2018
Technical article Can I get that shunt reference to go, please? PDF | HTML 29 Feb 2016

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