LT1782 Datasheet, PDF (1/12 Pages) Linear Technology – Micropower, Over-The-Top SOT-23, Rail-to-Rail Input and Output Op Amp

FEATURES
s _{Operates with Inputs Above V}⁺
s _{Rail-to-Rail Input and Output}
s _{Micropower: 55µA Supply Current Max}
s _{Small SOT-23 Package}
s _{Low Input Offset Voltage: 800µV Max}
s _{Single Supply Input Range: 0V to 18V}
s _{High Output Current: 18mA Min}
s _{Specified on 3V, 5V and ±5V Supplies}
s _{Output Shutdown on 6-Lead Version}
s _{Reverse Battery Protection to 18V}
s _{High Voltage Gain: 1500V/mV}
s _{Gain Bandwidth Product: 200kHz}
s _{Slew Rate: 0.07V/µs}
s _{Operating Temperature Range: –40°C to 85°C}
U
APPLICATIO S
s _{Portable Instrumentation}
s _{Battery- or Solar-Powered Systems}
s _{Sensor Conditioning}
s _{Supply Current Sensing}
s _{Battery Monitoring}
s _{MUX Amplifiers}
s _{4mA to 20mA Transmitters}
TYPICAL APPLICATIO
Positive Supply Rail Current Sense
V⁺
5V TO 18V
200Ω
5V
0.2Ω
200Ω
+
LT1782
–
LOAD ^ILOAD
2N3904
V_OUT = 2Ω(I_LOAD)
0V TO 4.3V
2k
1782 TA01
LT1782
Micropower, Over-The-Top
SOT-23, Rail-to-Rail
Input and Output Op Amp
DESCRIPTIO
The LT^®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 55µA 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 5µA. 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.
Distribution of Input Offset Voltage
25
V_S = 5V, 0V
V_CM = 2.5V
20
15
10
5
0
–900
–600 –300 0 300 600 900
INPUT OFFSET VOLTAGE (µV)
1782 TA01a
1