LM129
LM129 is 6.9V Precision Voltage Reference manufactured by Linear Technology.
Features n Guaranteed 10ppm/°C Temperature Coefficient n Guaranteed 1Ω Maximum Dynamic Impedance n Guaranteed 20µV Maximum Wideband Noise n Wide Operating Current Range: 0.6m A to 15m A
Applications n Transducers n A/D and D/A Converters n Calibration Standards n Instrumentation Reference
Typical Application
20m A 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 20m A
129329 TA01
REVERSE VOLTAGE CHANGE (m V)
LM129/LM329 6.9V Precision Voltage Reference
Description
The LM®329 temperature pensated 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 20m A 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.
Reverse Voltage Change
8 TA = 25°C
7 6 5 4 3 2 1 0
0 2 4 6 8 10 REVERSE CURRENT (m A)
129329 TA01b
For more information .linear./LM329
129329fd
LM129/LM329...
