LT1782
Micropower, Over-The-Top
SOT-23, Rail-to-Rail
Input and Output Op Amp
FEATURES
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DESCRIPTIO
Operates with Inputs Above V
+
Rail-to-Rail Input and Output
Micropower: 55
碌
A Supply Current Max
Small SOT-23 Package
Low Input Offset Voltage: 800碌V Max
Single Supply Input Range: 0V to 18V
High Output Current: 18mA Min
Specified on 3V, 5V and
鹵5V
Supplies
Output Shutdown on 6-Lead Version
Reverse Battery Protection to 18V
High Voltage Gain: 1500V/mV
Gain Bandwidth Product: 200kHz
Slew Rate: 0.07V/碌s
Operating Temperature Range: 鈥?0擄C to 85擄C
The LT
廬
1782 is a 200kHz op amp available in the small
SOT-23 package that operates on all single and split
supplies with a total voltage of 2.5V to 18V. The amplifier
draws less than 55碌A(chǔ) of quiescent current and has reverse
battery protection, drawing negligible current for reverse
supply voltages up to 18V.
The input range of the LT1782 includes ground, and a
unique feature of this device is its Over-The-Top
TM
opera-
tion capability with either or both of its inputs above the
positive rail. The inputs handle 18V both differential and
common mode, independent of supply voltage. The input
stage incorporates phase reversal protection to prevent
false outputs from occurring even when the inputs are 9V
below the negative supply.
The LT1782 can drive loads up to 18mA and still maintain
rail-to-rail capability. A shutdown feature on the 6-lead
version can disable the part, making the output high
impedance and reducing quiescent current to 5碌A(chǔ). The
LT1782 op amp is available in the 5- and 6-lead
SOT-23 packages. For applications requiring higher speed,
refer to the LT1783.
, LTC and LT are registered trademarks of Linear Technology Corporation.
Over-The-Top is a trademark of Linear Technology Corporation.
APPLICATIO S
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Portable Instrumentation
Battery- or Solar-Powered Systems
Sensor Conditioning
Supply Current Sensing
Battery Monitoring
MUX Amplifiers
4mA to 20mA Transmitters
TYPICAL APPLICATIO
V
+
5V TO 18V
200鈩?/div>
5V
0.2鈩?/div>
200鈩?/div>
Distribution of Input Offset Voltage
25
V
S
= 5V, 0V
V
CM
= 2.5V
Positive Supply Rail Current Sense
PERCENTAGE OF AMPLIFIERS
20
15
+
LT1782
2N3904
V
OUT
= 2鈩?I
LOAD
)
0V TO 4.3V
2k
1782 TA01
10
鈥?/div>
5
LOAD
I
LOAD
0
鈥?00
鈥?00 鈥?00
0
300
600
INPUT OFFSET VOLTAGE (碌V)
U
900
1782 TA01a
U
U
1
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