LT1782
Micropower, Over-The-Top
SOT-23, Rail-to-Rail
Input and Output Op Amp
FEATURES DESCRIPTION
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The LT 1782 is a 200kHz op amp available in the small
Operates with Inputs Above V
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SOT-23 package that operates on all single and split sup-
Rail-to-Rail Input and Output
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plies with a total voltage of 2.5V to 18V. The amplifier
Micropower: 55A Supply Current Max
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draws less than 55A of quiescent current and has reverse
Operating Temperature Range: 40C to 125C
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battery protection, drawing negligible current for reverse
Low Profile (1mm) ThinSOT Package
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supply voltages up to 18V.
Low Input Offset Voltage: 800V Max
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Single Supply Input Range: 0V to 18V
The input range of the LT1782 includes ground, and a
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High Output Current: 18mA Min
unique feature of this device is its Over-The-Top opera-
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Specified on 3V, 5V and 5V Supplies
tion capability with either or both of its inputs above the
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Output Shutdown on 6-Lead Version
positive rail. The inputs handle 18V both differential and
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Reverse Battery Protection to 18V
common mode, independent of supply voltage. The input
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High Voltage Gain: 1500V/mV
stage incorporates phase reversal protection to prevent
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Gain Bandwidth Product: 200kHz
false outputs from occurring even when the inputs are 9V
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Slew Rate: 0.07V/s
below the negative supply.
The LT1782 can drive loads up to 18mA and still maintain
APPLICATIONS
rail-to-rail capability. A shutdown feature on the 6-lead
version can disable the part, making the output high
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Portable Instrumentation
impedance and reducing quiescent current to 5A. The
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Battery- or Solar-Powered Systems
LT1782 op amp is available in the 5- and 6-lead SOT-23
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Sensor Conditioning
packages. For applications requiring higher speed, refer
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Supply Current Sensing
to the LT1783.
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Battery Monitoring
n L, LT, LTC, LTM, Linear Technology and the Linear logo are registered trademarks and
MUX Amplifiers
ThinSOT and Over-The-Top are trademarks of Linear Technology Corporation. All other
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4mA to 20mA Transmitters trademarks are the property of their respective owners.
TYPICAL APPLICATION
Positive Supply Rail Current Sense Distribution of Input Offset Voltage
25
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V = 5V, 0V
V S
V = 2.5V
5V TO 18V
CM
200 20
5V
15
0.2
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MMBT3904
LT1782
10
200
V = 2(I )
OUT LOAD
0V TO 4.3V
5
I 2k
LOAD LOAD
1782 TA01a
0
900 600 300 0 300 600 900
INPUT OFFSET VOLTAGE (V)
1782 TA01b
1782fc
1
PERCENTAGE OF AMPLIFIERS+
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LT1782
(Note 1)
ABSOLUTE MAXIMUM RATINGS
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Total Supply Voltage (V to V ) ................................ 18V Specified Temperature Range (Note 4)
Input Differential Voltage.......................................... 18V LT1782C ...............................................40C to 85C
Input Pin Voltage to V ................................ + 24V/10V LT1782I ................................................40C to 85C
Shutdown Pin Voltage Above V ............................. 18V LT1782H ............................................40C to 125C
Shutdown Pin Current ........................................ 10mA Junction Temperature........................................... 150C
Output Short-Circuit Duration (Note 2) ........... Indefinite Storage Temperature Range ................... 65C to 150C
Operating Temperature Range (Note 3) Lead Temperature (Soldering, 10 sec) .................. 300C
LT1782C ...............................................40C to 85C
LT1782I ................................................40C to 85C
LT1782H ............................................40C to 125C
PIN CONFIGURATION
TOP VIEW TOP VIEW
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+
V
OUT 1 5 V OUT 1 6
2 V 2 5 SHDN
V
IN
+IN 3 4 IN +IN 3 4
S5 PACKAGE S6 PACKAGE
5-LEAD PLASTIC TSOT-23 6-LEAD PLASTIC TSOT-23
T = 150C, = 250C/W T = 150C, = 230C/W
JMAX JA JMAX JA
ORDER INFORMATION
LEAD FREE FINISH TAPE AND REEL PART MARKING PACKAGE DESCRIPTION SPECIFIED TEMPERATURE RANGE
LT1782CS5#PBF LT1782CS5#TRPBF LTLD 5-Lead Plastic TSOT-23 0C to 70C
LT1782IS5#PBF LT1782IS5#TRPBF LTLE 5-Lead Plastic TSOT-23 40C to 85C
LT1782HS5#PBF LT1782HS5#TRPBF LTXK 5-Lead Plastic TSOT-23 40C to 125C
LT1782CS6#PBF LT1782CS6#TRPBF LTIS 6-Lead Plastic TSOT-23 0C to 70C
LT1782IS6#PBF LT1782IS6#TRPBF LTIT 6-Lead Plastic TSOT-23 40C to 85C
LT1782HS6#PBF LT1782HS6#TRPBF LTXL 6-Lead Plastic TSOT-23 40C to 125C
Consult LTC Marketing for parts specified with wider operating temperature ranges.
Consult LTC Marketing for information on non-standard lead based finish parts.
For more information on lead free part marking, go to: