Issue 2 - February 2007

1

www.zetex.com

© Zetex Semiconductors plc 2007

LM4040

Precision micropower shunt voltage references

Description

Ordering information

The LM4040 is a family of bandgap circuits

designed to achieve precision micro-power

voltage references of 2.5V and 5.0V. The

devices are available in 0.5% C-grade and 1%

D-grade initial tolerances.

They are available in small outline SOT23

surface mount package which is ideal for

applications where space saving is important.

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

•

No output capacitor required

•

Output voltage tolerance

•

LM4040C

±0.5% at 25°C

•

LM4040D

±1% at 25°C

•

Low output noise

•

Wide operating current range 60 A to 15mA

•

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

•

Low temperature coefficient 100 ppm/°C (max)

Applications

•

Battery powered equipment

•

Precision power supplies

•

Portable instrumentation

•

Portable communications devices

•

Notebook and palmtop computers

•

Data acquisition systems

Pinout information

25°C

Tol.

Voltage

(V)

Order code

Pack

Part

mark

Status

Reel size

Tape

width

QuantIty

per reel

0.5%

2.5

LM4040C25FTA

SOT23

R2C

Preview

7”, 180mm

8mm

3000

5.0

LM4040C50FTA

SOT23

R5C

Preview

7”, 180mm

8mm

3000

1%

2.5

LM4040D25FTA

SOT23

R2D

Preview

7”, 180mm

8mm

3000

5.0

LM4040D50FTA

SOT23

R5D

Preview

7”, 180mm

8mm

3000

*

Anode

Cathode

Top view

* Pin 3 must be left floating or connected to pin 2

1

3

2

LM4040_F (SOT23)