LT1797 Datasheet, PDF (1/12 Pages) Linear Technology – 10MHz, Rail-to-Rail Input and Output Op Amp in SOT-23

FEATURES
s _{Rail-to-Rail Input and Output}
s _{Small SOT-23 Package}
s _{Gain Bandwidth Product: 10MHz}
s _{–40°C to 85°C Operation}
s _{Slew Rate: 2.25V/µs}
s _{Low Input Offset Voltage: 1.5mV Max}
s _{High Output Current: 25mA Min}
s _{Specified on 3V, 5V and ±5V Supplies}
s _{High Voltage Gain: 1000V/mV 10k Load}
s _{High CMRR: 88dB Min}
s _{High PSRR: 80dB Min}
s _{Input Bias Current: 300nA Max}
s _{Input Offset CurrUent: 25nA Max}
APPLICATIO S
s _{Portable Instrumentation}
s _{Rail-to-Rail Buffer Amplifiers}
s _{Low Voltage Signal Processing}
s _{Driving A/D Converters}
s _{Battery-Powered Systems}
LT1797
10MHz, Rail-to-Rail
Input and Output
Op Amp in SOT-23
DESCRIPTIO
The LT^®1797 is a unity-gain stable 10MHz op amp avail-
able in the small SOT-23 package that operates on all
single and split supplies with a total voltage of 2.7V to 12V.
The amplifier draws 1mA of quiescent current and has a
slew rate of 2.25V/µs.
The input common mode range of the LT1797 includes
both rails, making it ideal for current sensing applications.
The input stage incorporates phase reversal protection to
prevent false outputs from occurring when the inputs are
driven beyond the supplies. Protective resistors are in-
cluded in the input leads so that current does not become
excessive when the inputs are forced above or below the
supplies.
The output of the LT1797 can swing to within 50mV of V ⁺
and 8mV of V ^– without drawing excess current in either
condition. The amplifier can drive loads up to 25mA and
still maintain rail-to-rail capability.
The LT1797 op amp is available in the space saving 5-lead
SOT-23 package.
, LTC and LT are registered trademarks of Linear Technology Corporation.
TYPICAL APPLICATION
3.3k
0805
×3
BZX84C6V8
V_Z = 6.8V
–48V SUPPLY
(–42V TO –56V)
Fast Compact – 48V Current Sense
30.1Ω
1%
0.003Ω
1% 3W
–
+
I_SENSE
–
LT1797
+
V_OUT = 3V – 0.1Ω • I_SENSE
I_SENSE = 0A TO 30A
ACCURACY ≈ 3%
V_OUT
Q1
FMMT493
R1
1k
4.7k 1%
V_S = 3V
R1 REDUCES Q1 DISSIPATION
0.1µF
SETTLES TO 1% IN 2µs,
1V OUTPUT STEP
–48V LOAD
1797 TA01
1