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1 Features

1? Operating Current Range 20 μA to 20 mA

? 1.5% and 3% Initial Voltage Tolerance

? Reference Impedance

– LM385 1 Ω Maximum at 25°C

– All Devices 1.5 Ω Maximum Over Full

Temperature Range

? Very Low Power Consumption

2 Applications

? Portable Meter References

? Portable Test Instruments

? Battery-Operated Systems

? Current-Loop Instrumentation

? Panel Meters

3 Description

The LMx85-2.5 and LM385B are micropower, twoterminal,

band-gap voltage references that operate

over a 20-μA to 20-mA current range and feature

exceptionally low dynamic impedance and good

temperature stability. On-chip trimming provides tight

voltage tolerance. The band-gap reference for these

devices has low noise and long-term stability.

The design makes these devices exceptionally

tolerant of capacitive loading and, thus, easier to use

in most reference applications. The wide dynamic

operating temperature range accommodates varying

current supplies, with excellent regulation.

The extremely low power drain of this series makes

these devices 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

wide operating current range of these voltage

references allows them to replace older references

with tighter-tolerance parts.