LT1790
Micropower SOT-23
Low Dropout Reference Family
FEATURES
DESCRIPTION
TheLT®1790isafamilyofSOT-23micropowerlowdropout
seriesreferencesthatcombinehighaccuracyandlowdrift
with low power dissipation and small package size. These
micropower references use curvature compensation to
obtain a low temperature coefficient and trimmed preci-
sionthin-filmresistorstoachievehighoutputaccuracy. In
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High Accuracy:
A Grade—0.05% Max
B Grade—0.1% Max
Low Drift:
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A Grade—10ppm/°C Max
B Grade—25ppm/°C Max
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Low Thermal Hysteresis 40ppm (Typical) –40°C to 85°C
Low Supply Current: 60μA Max
addition, each LT1790 is post-package trimmed to greatly
reducethetemperaturecoefficientandincreasetheoutput
accuracy. Output accuracy is further assured by excellent
line and load regulation. Special care has been taken to
minimize thermally induced hysteresis.
Sinks and Sources Current
Low Dropout Voltage
Guaranteed Operational –40°C to 125°C
Wide Supply Range to 18V
Available Output Voltage Options: 1.25V, 2.048V,
2.5V, 3V, 3.3V, 4.096V and 5V
Low Profile (1mm) ThinSOT™ Package
The LT1790s are ideally suited for battery-operated sys-
tems because of their small size, low supply current and
reduced dropout voltage. These references provide sup-
ply current and power dissipation advantages over shunt
referencesthatmustidletheentireloadcurrenttooperate.
Since the LT1790 can also sink current, it can operate as
a micropower negative voltage reference with the same
performance as a positive reference.
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APPLICATIONS
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Handheld Instruments
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Negative Voltage References
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.
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Industrial Control Systems
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Data Acquisition Systems
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Battery-Operated Equipment
TYPICAL APPLICATION
Positive Connection for LT1790-2.5
Typical VOUT Distribution for LT1790-2.5
50
167 UNITS
4
6
45
V
= 2.5V
LT1790-2.5
1, 2
2.6V ≤ V ≤ 18V
OUT
IN
40
0.1μF
1μF
LT1790B LIMITS
35
LT1790A LIMITS
1790 TA01
30
25
20
15
10
5
0
2.498
2.499 2.500
2.501
2.502
OUTPUT VOLTAGE (V)
1790 TA02
1790fb
1