LM199/LM399

LM199A/LM399A

1

199399fc

For more information www.linear.com/LM399

Typical applicaTion

FeaTures

DescripTion

Precision Reference

The LM199/LM399 precision shunt reference features

excellent temperature stability over a wide range of volt-

age, temperature and operating current conditions. A

stabilizing heater is incorporated with the active Zener on

a monolithic substrate which nearly eliminates changes in

voltage with temperature. The subsurface Zener operates

overacurrentrangeof0.5mAto10mA,andoffersminimal

noise and excellent long-term stability.

IdealapplicationsfortheLM199/LM399includedigitalvolt-

meters, precision calibration equipment, current sources

and a variety of other precision low cost references. A 10V

buffered reference application is shown below.

10V Buffered Reference

Reverse Voltage Change

applicaTions

L

, LT, LTC, LTM, Linear Technology and the Linear logo are registered trademarks of Linear

Technology Corporation. All other trademarks are the property of their respective owners.

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Precision Voltage Reference for Multimeters

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Calibration Equipment Voltage Standards

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Laboratory Measurement Equipment

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Industrial Monitor/Control Instruments

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High Accuracy Data Converters

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6.95V Shunt Reference

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Guaranteed 0.5ppm/°C Temperature Coefficient

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Guaranteed 1

Ω Maximum Dynamic Impedance

n

n

Guaranteed Initial Tolerance of 2%

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Wide Operating Current Range

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Available in 4-Lead TO-46 Metal Can

9k

0.1%

7.5k

5%

3

+

–

1

4

2

6.95V

15V

LM399H

20k

0.1%

2

7

4

6

10V

3

LM199 TA01a

REVERSE CURRENT (mA)

0

3

4

5

6

10

LM199 TA01b

2

1

0

2

4

8

6

7

8

STABILIZED