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LT1634
1
1634fe
TYPICAL APPLICATION
FEATURES
APPLICATIONS
DESCRIPTION
Micropower Precision
Shunt Voltage Reference
Super Accurate ±4.096V Output References
n
Initial Voltage Accuracy: 0.05%
n
Low Operating Current: 10μA
n
Low Drift: 10ppm/°C Max
n
Less Than 1Ω Dynamic Impedance
n
Both Commercial and Industrial Temperature Range
Parts Are Available
n
Available in 1.25V, 2.5V, 4.096V and 5V in SO-8
and TO-92 Packages
n
1.25V and 2.5V Available in MSOP Package
n
Portable Meters
n
Precision Regulators
n
A/D and D/A Converters
n
Calibrators
The LT
®
1634 is a micropower, precision, shunt voltage
reference. The bandgap reference uses trimmed preci-
sion thin fi lm resistors to achieve 0.05% initial voltage
accuracy. Improved curvature correction technique guar-
antees 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.
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.
–
+
LT1495
5V
–5V
LT1634-4.096
I
S
= 200μA
OUTPUT ACCURACY
BETTER THAN 0.075%
AT ±500μA OUTPUT
LTC
®
1043
5V
–5V
–5V
5V
1634 TA01
1μF
1μF
6
4
17
18
5
15
45k
V
OUT
4.096V
–
+
LT1495
V
OUT
–4.096V
TEMPERATURE (°C)
–40
REVERSE VOLTAGE CHANGE (mV)
1.5
0
1634 TA02
0
–1.0
–20 20
–1.5
–2.0
2.0
1.0
0.5
–0.5
40 60 80 100
I
R
= 10μA
V
OUT
= 1.25V
Temperature Drift
LT, LTC and LTM are registered trademarks of Linear Technology Corporation.
All other trademarks are the property of their respective owners.
