LM129/LM329
6.9V Precision
Voltage Reference
FeaTures
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DescripTion
The
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.
Guaranteed
10ppm/°C Temperature Coefficient
Guaranteed
1Ω Maximum Dynamic Impedance
Guaranteed
20µV Maximum Wideband Noise
Wide Operating Current Range: 0.6mA to 15mA
applicaTions
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Transducers
A/D and D/A Converters
Calibration Standards
Instrumentation Reference
Typical applicaTion
20mA Positive Current Source
20V
REVERSE VOLTAGE CHANGE (mV)
20k
0.1%
2
7
LT1001
6
174
0.1%
8
7
6
5
4
3
2
1
0
0
2
8
6
REVERSE CURRENT (mA)
4
10
129329 TA01b
Reverse Voltage Change
T
A
= 25°C
LM329
6.95V
–
+
3
20k
0.1%
4
10k
OUT
20mA
129329 TA01
4.3k
129329fd
For more information
1
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