LM4040-N-Q1

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Automotive, 100-ppm/°C precision micropower shunt voltage reference

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Data sheet

document-pdfAcrobat LM4040-N/-Q1 Precision Micropower Shunt Voltage Reference datasheet (Rev. N) PDF | HTML

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Automotive, 20ppm/°C maximum drift high precision shunt voltage reference LM4060-Q1 offers 75% better initial accuracy, and an increase to 50mA cathode current support.

LM4040-N-Q1

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Data sheet

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Product details

Rating

Automotive

VO (V)

2.5, 3

Initial accuracy (max) (%)

0.1, 0.2, 0.5, 1, 2

Iz for regulation (min) (µA)

45, 60, 62, 68, 74, 91, 100

VO adj (min) (V)

2.048

VO adj (max) (V)

3

Reference voltage (V)

Fixed

TI functional safety category

Functional Safety-Capable

Temp coeff (max) (ppm/°C)

100, 150

Operating temperature range (°C)

-40 to 125

Iout/Iz (max) (mA)

15

Rating

Automotive

VO (V)

2.5, 3

Initial accuracy (max) (%)

0.1, 0.2, 0.5, 1, 2

Iz for regulation (min) (µA)

45, 60, 62, 68, 74, 91, 100

VO adj (min) (V)

2.048

VO adj (max) (V)

3

Reference voltage (V)

Fixed

TI functional safety category

Functional Safety-Capable

Temp coeff (max) (ppm/°C)

100, 150

Operating temperature range (°C)

-40 to 125

Iout/Iz (max) (mA)

15

SOT-23 (DBZ)

3

6.9204 mm² (2.92 mm × 2.37 mm)

LM4040-N-Q1 AEC Q-100 qualified for automotive applications
- Extended Grade 1: −40°C to +125°C, TA
- Industrial Grade 3: −40°C to +85°C, TA
Small packages: SOT-23, TO-92, and SC70
No output capacitor required
Tolerates capacitive loads
Fixed reverse breakdown voltages of 2.048V, 2.5V, 3V, 4.096V, 5V, 8.192V, and 10V
Key specifications (2.5V LM4040-N)
- Output voltage tolerance (A Grade, 25°C): ±0.1% (maximum)
- Low output noise (10Hz to 10kHz): 35µVrms (typical)
- Wide operating current range: 60µA to 15mA
- Industrial temperature range: −40°C to +85°C
- Extended temperature range: −40°C to +125°C
- Low temperature coefficient: 100ppm/°C (maximum)

LM4040-N-Q1 AEC Q-100 qualified for automotive applications
- Extended Grade 1: −40°C to +125°C, TA
- Industrial Grade 3: −40°C to +85°C, TA
Small packages: SOT-23, TO-92, and SC70
No output capacitor required
Tolerates capacitive loads
Fixed reverse breakdown voltages of 2.048V, 2.5V, 3V, 4.096V, 5V, 8.192V, and 10V
Key specifications (2.5V LM4040-N)
- Output voltage tolerance (A Grade, 25°C): ±0.1% (maximum)
- Low output noise (10Hz to 10kHz): 35µVrms (typical)
- Wide operating current range: 60µA to 15mA
- Industrial temperature range: −40°C to +85°C
- Extended temperature range: −40°C to +125°C
- Low temperature coefficient: 100ppm/°C (maximum)

Designed for space-critical applications, the LM4040-N precision voltage reference is available in small SC70 and SOT-23 surface-mount package. The advanced design of the LM4040-N eliminates the need for an external stabilizing capacitor while maintaining 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: 2.048V, 2.5V, 3V, 4.096V, 5V, 8.192V, and 10V. The minimum operating current increases from 60µA for the 2.5V LM4040-N to 100µA for the 10V LM4040-N. All versions have a maximum operating current of 15mA.

The LM4040-N uses a fuse and Zener-zap reverse breakdown voltage trim during wafer sort to make sure 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 provide 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 1.2V. See the LM4041-N data sheet (SNOS641).

Designed for space-critical applications, the LM4040-N precision voltage reference is available in small SC70 and SOT-23 surface-mount package. The advanced design of the LM4040-N eliminates the need for an external stabilizing capacitor while maintaining 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: 2.048V, 2.5V, 3V, 4.096V, 5V, 8.192V, and 10V. The minimum operating current increases from 60µA for the 2.5V LM4040-N to 100µA for the 10V LM4040-N. All versions have a maximum operating current of 15mA.

The LM4040-N uses a fuse and Zener-zap reverse breakdown voltage trim during wafer sort to make sure 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 provide 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 1.2V. See the LM4041-N data sheet (SNOS641).

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Technical documentation

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Top documentation	Type	Title	Format options	Date
*	Data sheet	LM4040-N/-Q1 Precision Micropower Shunt Voltage Reference datasheet (Rev. N)	PDF \| HTML	Aug 27, 2025
	Functional safety information	LM4040-N-Q1 Functional Safety FIT Rate, FMD and Pin FMA (Rev. A)	PDF \| HTML	Nov 19, 2024
	Application brief	Discrete Power Design for C2000™	PDF \| HTML	Aug 15, 2024
	Application note	Voltage Reference Selection and Design Tips For Data Converters (Rev. B)	PDF \| HTML	Jan 9, 2024
	Application brief	Using Voltage Supervisors in High Voltage Applications (Rev. B)	PDF \| HTML	Feb 20, 2023
	E-book	Voltage Supervisor and Reset ICs: Tips, Tricks and Basics		Jun 28, 2019
	Technical article	How to use a voltage reference as a voltage regulator	PDF \| HTML	Dec 4, 2018
	Application note	AN-1525 Single Supply Operation of the DAC0800 and DAC0802 (Rev. A)		Apr 22, 2013
	Application note	Negative Buck Switching Regulator (using LM258x)		Mar 21, 2007

Design & development

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Simulation model

LM4040_NA10P0 PSpice Transient Model

SNOM420.ZIP (25 KB) - PSpice model

Supported products & hardware

LM4040-N-Q1

Automotive, 100-ppm/°C precision micropower shunt voltage reference

A newer version of this product is available

Drop-in replacement with upgraded functionality to the compared device.

LM4040-N-Q1

Product details

Similar products you might be interested in

Drop-in replacement with upgraded functionality to the compared device.

Technical documentation

Design & development

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