LT1634
Micropower Precision
Shunt Voltage Reference
FEATURES
DESCRIPTION
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The LT®1634 is a micropower, precision, shunt voltage
reference. The bandgap reference uses trimmed precision thin film resistors to achieve 0.05% initial voltage
accuracy. Improved curvature correction technique guarantees 10ppm/°C maximum temperature drift. Advances
in design, processing and packaging techniques guarantee
10μA operation and low temperature cycling hysteresis.
The LT1634 does not require an output compensation
capacitor, but is stable with capacitive loads. Low dynamic
impedance makes the LT1634 reference easy to use from
unregulated supplies.
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Initial Voltage Accuracy: 0.05%
Low Operating Current: 10μA
Low Drift: 10ppm/°C Max
Less Than 1Ω Dynamic Impedance
Both Commercial and Industrial Temperature Range
Parts Are Available
Available in 1.25V, 2.5V, 4.096V and 5V in SO-8
and TO-92 Packages
1.25V and 2.5V Available in MSOP Package
APPLICATIONS
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The LT1634 reference can be used as a high performance
upgrade to the LM185/LM385, LT1004 and LT1034 where
lower power and guaranteed temperature drift is
required.
Portable Meters
Precision Regulators
A/D and D/A Converters
Calibrators
LT, LTC and LTM are registered trademarks of Linear Technology Corporation.
All other trademarks are the property of their respective owners.
TYPICAL APPLICATION
Super Accurate ±4.096V Output References
Temperature Drift
5V
45k
2.0
LT1634-4.096
VOUT
4.096V
LT1495
–
–5V
5V
4
5
IS = 200μA
OUTPUT ACCURACY
BETTER THAN 0.075%
AT ±500μA OUTPUT
LTC®1043
6
1μF
15
18
REVERSE VOLTAGE CHANGE (mV)
+
1.5
IR = 10μA
VOUT = 1.25V
1.0
0.5
0
–0.5
–1.0
–1.5
–2.0
–40
17
–5V
5V
–20
40
60
20
0
TEMPERATURE (°C)
80
100
1634 TA02
–
LT1495
VOUT
–4.096V
+
1μF
–5V
1634 TA01
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