Advanced Monolithic Systems, Inc.

6680B Sierra Lane, Dublin, CA 94568 Phone (925) 556-9090 Fax (925) 556-9140

Advanced

AMS4040

Monolithic

MICROPOWER SHUNT VOLTAGE REFERENCE

Systems

FEATURES

APPLICATIONS

•• Tight Output Voltage Tolerance

•• Battery Powered Systems

•• Low Output Noise

•• Instrumentation

•• Operating Current 250µµA to 100mA

•• Energy Management

•• Low Dynamic Impedance

•• Automotive

•• Low Temperature Coefficient

•• Precision Audio Components

•• Available in the sub-miniature SOT-23 Package

•• Product Testing

•• 1.2V Device ( AMS4041) also available

•• Data Acquisition Systems

GENERAL DESCRIPTION

The AMS4040 is a two-terminal micropower band-gap voltage reference diode featuring a very low dynamic impedance and

good temperature coefficient, operating over a 250µA to 100mA current range. On-chip trimming is used to provide tight

voltage tolerance. Since the AMS4040 band-gap reference uses only transistors and resistors, low noise and good long term

stability result. The wide dynamic operating range allows its use with widely varying supplies with excellent regulation. The

extremely low power drain of the AMS4040 makes these reference diodes useful for micropower circuitry. These voltage

references can be used to make portable meters, regulators or general purpose analog circuitry with battery life approaching

shelf life.

The AMS4040 is operational in the full industrial temperature range of -40

°C to +85°and is available in small space saving

TO-92, SO-8, SOT-89 and SOT-23 packages.

TOL.

PACKAGE TYPE

OPERATING

TO-92

8 LEAD SOIC

SOT-89

3 LEAD SOT-23

TEMP. RANGE

±0.25%

AMS4040AN

AMS4040AS

AMS4040AL

AMS4040AM

-40 to +85

° C

±0.5%

AMS4040BN

AMS4040BS

AMS4040BL

AMS4040BM

-40 to +85

° C

±1.0%

AMS4040CN

AMS4040CS

AMS4040CL

AMS4040CM

-40 to +85

° C

PIN CONNECTIONS

TO-92

8L SOIC

SOT-89

3L SOT-23

Plastic Package (N)

SO Package (S)

(L)

(M)

1

2

3

-

+

N/C

N/C

N/C

N/C

N/C

N/C

N/C

+

-

1

2

8

4

3

7

5

6

1

2

3

+

-

3 *

2

1

*This pin must be left floating

or connected to pin 2

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