LM129B(1985) 查看數據表（PDF） - Linear Technology
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LM129B Datasheet PDF : 4 Pages
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FEATURES
s Guaranteed 10ppm/°C Temperature Coefficient
s Guaranteed 1Ω Maximum Dynamic Impedance
s Guaranteed 20µV Maximum Wideband Noise
s Wide Operating Current Range 0.6mA to 15mA
U
APPLICATIO S
s Transducers
s A/D and D/A Converters
s Calibration Standards
s Instrumentation Reference
TYPICAL APPLICATIO
LM129/LM329
6.9V Precision
Voltage Reference
DESCRIPTIO
The LM129 temperature compensated 6.9V zener refer-
ences provide excellent stability over time and tempera-
ture, very low dynamic impedance and a wide operating
current range. The device achieves low dynamic imped-
ance 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 elimi-
nates surface noise phenomenon associated with ordi-
nary 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.
, LTC and LT are registered trademarks of Linear Technology Corporation.
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
129/329 TA01
Reverse Voltage Change
8
TA = 25°C
7
6
5
4
3
2
1
0
0
2
4
6
8
10
REVERSE CURRENT (mA)
129/329 TA01b
1
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