LT1790 Datasheet, PDF (1/24 Pages) Linear Technology – Micropower SOT-23 Low Dropout Reference Family

LT1790
Micropower SOT-23
Low Dropout Reference Family
FEATURES
s _{High Accuracy:}
A Grade—0.05% Max
B Grade—0.1% Max
s _{Low Drift:}
A Grade—10ppm/°C Max
B Grade—25ppm/°C Max
s _{Low Profile (1mm) ThinSOT}^TM _Package
s _{Low Supply Current: 60µA Max}
s _{Sinks and Sources Current}
s _{Low Dropout Voltage}
s _{Guaranteed Operational –40°C to 125°C}
s _{Wide Supply Range to 18V}
s _{Available Output Voltage Options: 1.25V, 2.048V,}
2.5V, 3V, 3.3V, 4.096V and 5V
U
APPLICATIO S
s _{Handheld Instruments}
s _{Negative Voltage References}
s _{Industrial Control Systems}
s _{Data Acquisition Systems}
s _{Battery-Operated Equipment}
DESCRIPTIO
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 com-
pensation to obtain a low temperature coefficient and
trimmed precision thin-film resistors to achieve high
output accuracy. In addition, each LT1790 is post-pack-
age 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.
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 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.
, LTC and LT are registered trademarks of Linear Technology Corporation.
ThinSOT is a trademark of Linear Technology Corporation.
TYPICAL APPLICATIO
Positive Connection for LT1790-2.5
2.6V ≤ V_IN ≤ 18V
0.1µF
4
6
LT1790-2.5
1, 2
V_OUT = 2.5V
1µF
1790 TA01
Typical V_OUT Distribution for LT1790-2.5
50
167 UNITS
45
40
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
1790fa
1