LT1634 Datasheet, PDF (1/12 Pages) Linear Technology – Micropower Precision Shunt Voltage Reference

LT1634
Micropower Precision
Shunt Voltage Reference
FEATURES
s _{Initial Voltage Accuracy: 0.05%}
s _{Low Operating Current: 10µA}
s _{Low Drift: 10ppm/°C Max}
s _{Less Than 1Ω Dynamic Impedance}
s _{Available in 1.25V, 2.5V, 4.096V and 5V in SO-8}
and TO-92 Packages
s _{1.25V and 2.5V Available in MSOP Package}
s _{Both Commercial and Industrial Temperature Range}
Parts Are Available
U
APPLICATIONS
s _{Portable Meters}
s _{Precision Regulators}
s _{A/D and D/A Converters}
s _Calibrators
DESCRIPTION
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 accu-
racy. Improved curvature correction technique guaran-
tees 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.
, LTC and LT are registered trademarks of Linear Technology Corporation.
TYPICAL APPLICATION
Super Accurate ±4.096V Output References
5V
45k
+
LT1634-4.096
LT1495
–
– 5V
5V
4
5 ^LTC®1043 6
V_OUT
4.096V
I_S = 200µA
OUTPUT ACCURACY
BETTER THAN 0.075%
AT ±500µA OUTPUT ₁₅
1µF
18
17
– 5V
5V
–
LT1495
+
1µF
– 5V
V_OUT
– 4.096V
1634 TA01
Temperature Drift
2.0
I_R = 10µA
1.5 ^VOUT ^{= 1.25V}
1.0
0.5
0
– 0.5
– 1.0
– 1.5
– 2.0
– 40 –20
0 20 40 60
TEMPERATURE (°C)
80 100
1634 TA02
1