LT1782_15 Datasheet, PDF (1/16 Pages) Linear Technology – Micropower, Over-The-Top SOT-23, Rail-to-Rail Input and Output Op Amp

FEATURES
n _{Operates with Inputs Above V}⁺
n _{Rail-to-Rail Input and Output}
n _{Micropower: 55µA Supply Current Max}
n _{Operating Temperature Range: –40°C to 125°C}
n _{Low Profile (1mm) ThinSOT™ Package}
n _{Low Input Offset Voltage: 800µV Max}
n _{Single Supply Input Range: 0V to 18V}
n _{High Output Current: 18mA Min}
n _{Specified on 3V, 5V and ±5V Supplies}
n _{Output Shutdown on 6-Lead Version}
n _{Reverse Battery Protection to 18V}
n _{High Voltage Gain: 1500V/mV}
n _{Gain Bandwidth Product: 200kHz}
n _{Slew Rate: 0.07V/µs}
APPLICATIONS
n _{Portable Instrumentation}
n _{Battery- or Solar-Powered Systems}
n _{Sensor Conditioning}
n _{Supply Current Sensing}
n _{Battery Monitoring}
n _{MUX Amplifiers}
n _{4mA to 20mA Transmitters}
TYPICAL APPLICATION
Positive Supply Rail Current Sense
V⁺
5V TO 18V
200Ω
5V
0.2Ω
200Ω
+
LT1782
–
LOAD ^ILOAD
MMBT3904
V_OUT = 2Ω(I_LOAD)
0V TO 4.3V
2k
1782 TA01a
LT1782
Micropower, Over-The-Top
SOT-23, Rail-to-Rail
Input and Output Op Amp
DESCRIPTION
The LT^®1782 is a 200kHz op amp available in the small
SOT-23 package that operates on all single and split sup-
plies 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™ 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.
L, LT, LTC, LTM, Linear Technology and the Linear logo are registered trademarks and
ThinSOT and Over-The-Top are trademarks of Linear Technology Corporation. All other
trademarks are the property of their respective owners.
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 TA01b
1782fc
1