LM199/LM399

LM199A/LM399A

1

LM199399fb

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

over a current range of 0.5mA to 10mA, and offers minimal

noise and excellent long-term stability.

Ideal applications for the LM199/LM399 include digital volt-

meters, precision calibration equipment, current sources

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

buffered reference application is shown below.

Ω Maximum Dynamic Impedance

10V Buffered Reference

APPLICATIO S

FEATURES

DESCRIPTIO

TYPICAL APPLICATIO

, LTC and LT are registered trademarks of Linear Technology Corporation.

All other trademarks are the property of their respective owners.

9k

0.1%

7.5k

5%

3

+

–

1

42

6.95V

15V

LM399H

20k

0.1%

2

7

4

6

10V

3

LM199 TA01a

LT

REVERSE CURRENT (mA)

0

3

4

5

6

10

LM199 TA01b

2

1

0

24

8

6

7

8

STABILIZED

Reverse Voltage Change