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Diodes LM4040 User Manual

Lm4040, Precision micropower shunt voltage references, Description

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LM4040

PRECISION MICROPOWER SHUNT VOLTAGE REFERENCES

LM4040

Document number: DS33195 Rev. 5 - 2

1 of 12

www.diodes.com

March 2012

© Diodes Incorporated

A Product Line of

Diodes Incorporated

Description

The LM4040 is a family of bandgap circuits designed to
achieve precision micro-power voltage references of 2.5V,
3.0V and 5.0V. The devices are available in 0.2% B-grade,
0.5% C-grade and 1% D-grade initial tolerances.

They are available in small outline SOT23 and SC70-5
surface mount packages which are ideal for applications
where space is at a premium.

Excellent performance is maintained over the 60µA to
15mA 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
LM4040 voltage reference.

Features

Small packages: SOT23 & SC70-5

No output capacitor required

Output voltage tolerance

o

LM4040B ±0.2% at 25°C

o

LM4040C ±0.5% at 25°C

o

LM4040D ±1% at 25°C

Low output noise

(10Hz to 10kHz) .............. 45µV

RMS

Wide operating current range 60µA to 15mA

Extended temperature range -40°C to +125°C

Low temperature coefficient 100 ppm/°C (max)

All parts AEC-Q100 Grade1 qualified

Applications

Battery powered equipment

Precision power supplies

• Portable

instrumentation

• Portable

communications

devices

Notebook and palmtop computers

Data acquisition systems

Pin Assignments

*

Anode

Cathode

Top view

* Pin 1 must be left floating or connected to pin 2

3

1

2

LM4040 F (SOT23)

Anode

*

Cathode

N/C

N/C

1

2

3

4

5

LM4040 H5 (SC70-5)

Top View

* Pin 2 must be left floating or connected to pin 1