LM199 - Precision Reference

National Semiconductor (now Texas Instruments)

Datasheet Details

Part number	LM199
Manufacturer	National Semiconductor (now Texas Instruments)
File Size	626.58 KB
Description	Precision Reference
Datasheet	LM199 Datasheet

General Description

The LM199 series are precision, temperature-stabilized monolithic zeners offering temperature coefficients a factor of ten better than high quality reference zeners.

Constructed on a single monolithic chip is a temperature stabilizer circuit and an active reference zener.

The active circuitry reduces the dynamic impedance of the zener to about 0.5Ω and allows the zener to operate over 0.5 mA to 10 mA current range with essentially no change in voltage or temperature coefficient.

Overview

LM199/LM299/LM399 Precision Reference April 2005 LM199/LM299/LM399 Precision.

Key Features

n Guaranteed 0.0001%/˚C temperature coefficient n Low dynamic impedance.
0.5Ω n Initial tolerance on breakdown voltage.
2% n Sharp breakdown at 400 µA n Wide operating current.
500 µA to 10 mA n Wide supply range for temperature stabilizer n Guaranteed low noise n Low power for stabilization.
300 mW at 25˚C n Proven reliability, low-stress packaging in TO-46 integrated-circuit hermetic package, for low hysteresis after thermal cycling. 33 million hours MTBF at.

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