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1FEATURES

2? Adjustable from 1.24V to 5.30V

? Operating Current of 10μA to 20mA

? 1% and 2% Initial Tolerance

? 1Ω Dynamic Impedance

? Low Temperature Coefficient

DESCRIPTION

The LM185/LM285/LM385 are micropower 3-terminal

adjustable band-gap voltage reference diodes.

Operating from 1.24 to 5.3V and over a 10μA to

20mA current range, they feature exceptionally low

dynamic impedance and good temperature stability.

On-chip trimming is used to provide tight voltage

tolerance. Since the LM185 band-gap reference uses

only transistors and resistors, low noise and good

long-term stability result.

Careful design of the LM185 has made the device

tolerant of capacitive loading, making it easy to use in

almost any reference application. The wide dynamic

operating range allows its use with widely varying

supplies with excellent regulation.

The extremely low power drain of the LM185 makes it

useful for micropower circuitry. This voltage reference

can be used to make portable meters, regulators or

general purpose analog circuitry with battery life approaching shelf life. Further, the wide operating

current allows it to replace older references with a

tighter tolerance part.

The LM185 is rated for operation over a ?55°C to

125°C temperature range, while the LM285 is rated

?40°C to 85°C and the LM385 0°C to 70°C. The

LM185 is available in a hermetic TO package and a

LCCC package, while the LM285/LM385 are

available in a low-cost TO-92 package, as well as

SOIC.