LM4040 Datasheet, PDF (1/10 Pages) National Semiconductor (TI) – Precision Micropower Shunt Voltage Reference

A Product Line of
Diodes Incorporated
LM4040
PRECISION MICROPOWER SHUNT VOLTAGE REFERENCES
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)
Pin Assignments
LM4040 F (SOT23)
Cathode 3
1_*
Anode 2
Top view
* Pin 1 must be left floating or connected to pin 2
LM4040 H5 (SC70-5)
Anode 1
4 N/C
*2
Cathode 3
5 N/C
Top View
* Pin 2 must be left floating or connected to pin 1
Applications
• Battery powered equipment
• Precision power supplies
• Portable instrumentation
• Portable communications devices
• Notebook and palmtop computers
• Data acquisition systems
LM4040
Document number: DS33195 Rev. 5 - 2
1 of 10
www.diodes.com
November 2010
© Diodes Incorporated