LT1790A LINER [Linear Technology], LT1790A Datasheet

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LT1790A

Manufacturer Part Number
LT1790A
Description
Micropower SOT-23 Low Dropout Reference Family
Manufacturer
LINER [Linear Technology]
Datasheet

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FEATURES
APPLICATIO S
TYPICAL APPLICATIO
High Accuracy:
Low Drift:
Low Profile (1mm) ThinSOT
Low Supply Current: 60 A Max
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
Handheld Instruments
Negative Voltage References
Industrial Control Systems
Data Acquisition Systems
Battery-Operated Equipment
2.6V V
A Grade—0.05% Max
B Grade—0.1% Max
A Grade—10ppm/ C Max
B Grade—25ppm/ C Max
IN
18V
0.1 F
Positive Connection for LT1790-2.5
U
4
LT1790-2.5
1, 2
TM
U
Package
6
1790 TA01
1 F
V
OUT
= 2.5V
Low Dropout Reference Family
DESCRIPTIO
The LT
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.
ThinSOT is a trademark of Linear Technology Corporation.
, LTC and LT are registered trademarks of Linear Technology Corporation.
®
1790 is a family of SOT-23 micropower low
50
45
40
35
30
25
20
15
10
Typical V
5
0
167 UNITS
2.498
Micropower SOT-23
OUT
U
2.499
OUTPUT VOLTAGE (V)
Distribution for LT1790-2.5
LT1790B LIMITS
LT1790A LIMITS
2.500
2.501
2.502
1790 TA02
LT1790
1790fa
1

Related parts for LT1790A

LT1790A Summary of contents

Page 1

... ThinSOT is a trademark of Linear Technology Corporation 2.5V OUT 1 F 1790 TA01 Micropower SOT-23 U 1790 is a family of SOT-23 micropower low Typical V Distribution for LT1790-2.5 OUT 50 167 UNITS 45 40 LT1790B LIMITS 35 LT1790A LIMITS 2.498 2.499 2.500 2.501 2.502 OUTPUT VOLTAGE (V) 1790 TA02 LT1790 1790fa 1 ...

Page 2

... LT1790BCS6-1.25 10ppm/ C LT1790ACS6-2.048 25ppm/ C LT1790BCS6-2.048 10ppm/ C LT1790ACS6-2.5 25ppm/ C LT1790BCS6-2.5 10ppm/ C LT1790ACS6-3 25ppm/ C LT1790BCS6-3 10ppm/ C LT1790ACS6-3.3 25ppm/ C LT1790BCS6-3.3 10ppm/ C LT1790ACS6-4.096 25ppm/ C LT1790BCS6-4.096 10ppm/ C LT1790ACS6-5 25ppm/ C LT1790BCS6-5 OUTPUT S6 PART MARKING* VOLTAGE 1.250V LTXT 2.048V LTXU 2.500V LTPZ 3.000V LTQA 3 ...

Page 3

... Hysteresis (Note 10) The denotes specifications that apply over the specified = and V = 2.6V, unless otherwise noted CONDITIONS LT1790A LT1790B LT1790AC LT1790AI LT1790BC LT1790BI MIN A MAX LT1790A LT1790B 2.6V V 18V IN I Source = 5mA 2.8V OUT IN I Sink = 1mA 3.2V OUT 0.1% IN OUT I = 0mA ...

Page 4

... The denotes specifications that apply over the specified = and V = 2.8V, unless otherwise noted CONDITIONS LT1790A LT1790B LT1790AC LT1790AI LT1790BC LT1790BI MIN A MAX LT1790A LT1790B 2.8V V 18V IN I Source = 5mA OUT I Sink = 3mA OUT V – 0.1% IN OUT OUT I = 0mA OUT ...

Page 5

... and V = 3V, unless otherwise noted CONDITIONS LT1790A LT1790B LT1790AC LT1790AI LT1790BC LT1790BI MIN A MAX LT1790A LT1790B 3V V 18V IN I Source = 5mA OUT I Sink = 3mA OUT V – 0.1% IN OUT OUT I = 0mA ...

Page 6

... and V = 3.5V, unless otherwise noted CONDITIONS LT1790A LT1790B LT1790AC LT1790AI LT1790BC LT1790BI MIN A MAX LT1790A LT1790B 3.5V V 18V IN I Source = 5mA OUT I Sink = 3mA OUT V – 0.1% IN OUT OUT I = 0mA OUT ...

Page 7

... The denotes specifications that apply over the specified = and V = 3.8V, unless otherwise noted CONDITIONS LT1790A LT1790B LT1790AC LT1790AI LT1790BC LT1790BI MIN A MAX LT1790A LT1790B 3.8V V 18V IN I Source = 5mA OUT I Sink = 3mA OUT V – 0.1% IN OUT OUT I = 0mA OUT ...

Page 8

... The denotes specifications that apply over the specified = and V = 4.6V, unless otherwise noted CONDITIONS LT1790A LT1790B LT1790AC LT1790AI LT1790BC LT1790BI MIN A MAX LT1790A LT1790B 4.6V V 18V IN I Source = 5mA OUT I Sink = 3mA OUT V – 0.1% IN OUT OUT I = 0mA OUT ...

Page 9

... and V = 5.5V, unless otherwise noted CONDITIONS LT1790A LT1790B LT1790AC LT1790AI LT1790BC LT1790BI MIN A MAX LT1790A LT1790B 5.5V V 18V IN I Source = 5mA OUT I Sink = 3mA OUT V – 0.1% IN OUT OUT I = 0mA OUT ...

Page 10

LT1790 ELECTRICAL CHARACTERISTICS Note 9: Long-term drift typically has a logarithmic characteristic and therefore changes after 1000 hours tend to be smaller than before that time. Long-term drift is affected by differential stress between the IC and the board material ...

Page 11

TYPICAL PERFOR A CE CHARACTERISTICS Each of the voltage options have similar performance curves. For the 3V, 3.3V and the 4.096V options, the curves can be estimated based on the 2.5V and 5V curves. Line Regulation 1.285 1.280 T ...

Page 12

LT1790 2.048V TYPICAL PERFOR A CE CHARACTERISTICS Each of the voltage options have similar performance curves. For the 3V, 3.3V and the 4.096V options, the curves can be estimated based on the 2.5V and 5V curves. Output Voltage Temperature Drift ...

Page 13

TYPICAL PERFOR A CE CHARACTERISTICS Each of the voltage options have similar performance curves. For the 3V, 3.3V and the 4.096V options, the curves can be estimated based on the 2.5V and 5V curves. – 2.048V Characteristics 0.30 R1 ...

Page 14

LT1790 2.5V TYPICAL PERFOR A CE CHARACTERISTICS Each of the voltage options have similar performance curves. For the 3V, 3.3V and the 4.096V options, the curves can be estimated based on the 2.5V and 5V curves. Output Voltage Temperature Drift ...

Page 15

TYPICAL PERFOR A CE CHARACTERISTICS Each of the voltage options have similar performance curves. For the 3V, 3.3V and the 4.096V options, the curves can be estimated based on the 2.5V and 5V curves. – 2.5V Characteristics 0.30 0.25 ...

Page 16

LT1790 W 5V TYPICAL PERFOR A CE CHARACTERISTICS Each of the voltage options have similar performance curves. For the 3V, 3.3V and the 4.096V options, the curves can be estimated based on the 2.5V and 5V curves. Output Voltage Temperature ...

Page 17

W 5V TYPICAL PERFOR A CE CHARACTERISTICS Each of the voltage options have similar performance curves. For the 3V, 3.3V and the 4.096V options, the curves can be estimated based on the 2.5V and 5V curves. – 5V Characteristics 0.30 ...

Page 18

LT1790 U U APPLICATIONS INFORMATION Bypass and Load Capacitors The LT1790 voltage references should have an input bypass capacitor of 0 larger, however the bypass- ing of other local devices may serve as the required component. These references ...

Page 19

U U APPLICATIONS INFORMATION V GEN Figure 6. LT1790-2.5 Sinking – 4mA to – 5mA Positive or Negative Operation Series operation is ideal for extending battery life LT1790 is operated in series mode ...

Page 20

LT1790 U U APPLICATIONS INFORMATION –80 –70 –60 –50 –40 –30 –20 –10 DISTRIBUTION (ppm) Figure 8. Worst-Case Hysteresis on 30 ...

Page 21

U U APPLICATIONS INFORMATION R1 R2 330k 4.7k ON SEMI MMBT5551 BZX84C12 C1 LT1790 0.1 F Figure 11. Extended Supply Range Reference V S 2.8V TO 3.3V NO LOAD SUPPLY CURRENT 120 A Figure 13. Compact, High Output Current, Low ...

Page 22

LT1790 PLIFIED SCHE ATIC OUT 1, 2 GND 1790 SS 1790fa ...

Page 23

PACKAGE DESCRIPTIO SOT-23 SOT-23 (Original) (ThinSOT) .90 – 1.45 1.00 MAX A (.035 – .057) (.039 MAX) .00 – 0.15 .01 – .10 A1 (.00 – .006) (.0004 – .004) .90 – 1.30 .80 – .90 A2 (.035 – .051) ...

Page 24

LT1790 U TYPICAL APPLICATIO V RELATED PARTS PART NUMBER DESCRIPTION LT1019 Precision Reference ® LTC 1798 Micropower Low Dropout Reference LT1460 Micropower Precison Series Reference LT1461 Micropower Precision Low Dropout Reference Linear Technology Corporation 24 1630 McCarthy Blvd., Milpitas, CA ...

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