LM129/LM329

1

129329fd

For more information www.linear.com/LM329

Typical applicaTion

DescripTion

6.9V Precision

Voltage Reference

The LM®329 temperature compensated 6.9V Zener

references provide excellent stability over time and

temperature, very low dynamic impedance and a wide

operating current range. The device achieves low dynamic

impedance by incorporating a high gain shunt regulator

around the Zener. The excellent noise performance of the

device is achieved by using a “buried Zener” design which

eliminates surface noise phenomenon associated with

ordinary Zeners. To serve a wide variety of applications,

the LM129 is available in several temperature coefficient

grades and two package styles. A 20mA positive current

source application is shown below.

20mA Positive Current Source

FeaTures

applicaTions

n

Guaranteed 10ppm/°C Temperature Coefficient

n

Guaranteed 1Ω Maximum Dynamic Impedance

n

Guaranteed 20µV Maximum Wideband Noise

n

Wide Operating Current Range: 0.6mA to 15mA

n

Transducers

n

A/D and D/A Converters

n

Calibration Standards

n

Instrumentation Reference

Reverse Voltage Change

–

+

20V

LM329

6.95V

20k

0.1%

174

0.1%

4.3k

20k

0.1%

LT1001

10k

OUT

20mA

129329 TA01

2

3

7

6

4

REVERSE CURRENT (mA)

0

6

10

129329 TA01b

2

4

8

8

7

6

5

4

3

2

1

0

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.