LT1783_15 Datasheet, PDF (1/16 Pages) Linear Technology – 1.25MHz, Over-The-Top Micropower, Rail-to-Rail Input and Output Op Amp in SOT-23

LT1783
FEATURES
1.25MHz, Over-The-Top
Micropower, Rail-to-Rail Input
and Output Op Amp in SOT-23
DESCRIPTION
n _{Operates with Inputs Above V}⁺
n _{Rail-to-Rail Input and Output}
n _{Micropower: 300μA Supply Current Max}
n _{Operating Temperature Range: –40°C to 125°C}
n _{Gain Bandwidth Product: 1.25MHz}
n _{Slew Rate: 0.42V/μs}
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 _{Low Profile (1mm) ThinSOT™ Package}
The LT^®1783 is a 1.25MHz 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 300μA of quiescent current and has reverse-battery
protection, drawing negligible current for reverse supply
voltages up to 18V.
The input range of the LT1783 includes ground, and a
unique feature of this device is its Over-The-Top^® opera-
tion capabilitity 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.
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}
The LT1783 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
LT1783 op amp is available in the 5- and 6-lead SOT-23
packages. For applications requiring lower power, refer
to the LT1782.
L, LT, LTC, LTM, Linear Technology, the Linear logo and Over-The-Top are registered
trademarks of Linear Technology Corporation. ThinSOT is a trademark of Linear Technology
Corporation. All other trademarks are the property of their respective owners.
TYPICAL APPLICATION
Positive Supply Rail Current Sense
V⁺
5V TO 18V
200Ω
0.2Ω
200Ω
5V
+
LT1783
–
LOAD ^ILOAD
2N3904
V_OUT = 2Ω(I_LOAD)
0V TO 4.3V
2k
1783 TA01
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)
1783 TA01b
1783fd
1