LT1790
Micropower SOT-23
Low Dropout Reference Family
FEATURES
DESCRIPTION
High Accuracy:
A Grade—0.05% Max
B Grade—0.1% Max
n Low Drift:
A Grade—10ppm/°C Max
B Grade—25ppm/°C Max
n Low Thermal Hysteresis 40ppm (Typical) –40°C to 85°C
n Low Supply Current: 60µA Max
n Sinks and Sources Current
n Low Dropout Voltage
n Guaranteed Operational –40°C to 125°C
n Wide Supply Range to 18V
n Available Output Voltage Options: 1.25V, 2.048V,
2.5V, 3V, 3.3V, 4.096V and 5V
n Low Profile (1mm) ThinSOT™ Package
The LT®1790 is a family of SOT-23 micropower low dropout
series references that combine high accuracy and low drift
with low power dissipation and small package size. These
micropower references use curvature compensation to
obtain a low temperature coefficient and trimmed precision thin-film resistors to achieve high output accuracy. In
addition, each LT1790 is post-package trimmed to greatly
reduce the temperature coefficient and increase the output
accuracy. Output accuracy is further assured by excellent
line and load regulation. Special care has been taken to
minimize thermally induced hysteresis.
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APPLICATIONS
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Handheld Instruments
Negative Voltage References
Industrial Control Systems
Data Acquisition Systems
Battery-Operated Equipment
The LT1790s are ideally suited for battery-operated
systems because of their small size, low supply current
and reduced dropout voltage. These references provide
supply current and power dissipation advantages over
shunt references that must idle the entire load current to
operate. Since the LT1790 can also sink current, it can
operate as a micropower negative voltage reference with
the same performance as a positive reference.
L, LT, LTC, LTM, Linear Technology and the Linear logo are registered trademarks of Linear
Technology Corporation. ThinSOT is a trademark of Linear Technology Corporation.
All other trademarks are the property of their respective owners.
TYPICAL APPLICATION
Positive Connection for LT1790-2.5
Typical VOUT Distribution for LT1790-2.5
50
0.1µF
LT1790-2.5
1, 2
6
45
VOUT = 2.5V
1790 TA01
167 UNITS
40
1µF
NUMBER OF UNITS
2.6V ≤ VIN ≤ 18V
4
LT1790B LIMITS
35
LT1790A LIMITS
30
25
20
15
10
5
0
2.498
2.499 2.500
2.501
OUTPUT VOLTAGE (V)
2.502
1790 TA02
1790fc
For more information www.linear.com/LT1790
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