LM329_15 Datasheet, PDF (1/8 Pages) Linear Technology – 6.9V Precision Voltage Reference

Features
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}
Applications
n _Transducers
n _{A/D and D/A Converters}
n _{Calibration Standards}
n _{Instrumentation Reference}
LM129/LM329
6.9V Precision
Voltage Reference
Description
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.
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.
Typical Application
20mA Positive Current Source
20V
20k
0.1%
174Ω
0.1%
LM329
6.95V
2_–
7
LT1001
3₊
4
20k
0.1%
6
10k
4.3k
OUT
20mA
129329 TA01
Reverse Voltage Change
8
T_A = 25°C
7
6
5
4
3
2
1
0
0
2
4
6
8
10
REVERSE CURRENT (mA)
129329 TA01b
For more information www.linear.com/LM329
129329fd
1