LT1797_1 Datasheet, PDF (1/14 Pages) Linear Technology – 10MHz, Rail-to-Rail Input and Output Op Amp in SOT-23

FEATURES
n _{Rail-to-Rail Input and Output}
n _{Small SOT-23 Package}
n _{Gain Bandwidth Product: 10MHz}
n _{–40°C to 85°C Operation}
n _{Slew Rate: 2.25V/μs}
n _{Low Input Offset Voltage: 1.5mV Max}
n _{High Output Current: 25mA Min}
n _{Specified on 3V, 5V and ±5V Supplies}
n _{High Voltage Gain: 1000V/mV 10k Load}
n _{High CMRR: 96dB Typ}
n _{High PSRR: 90dB Typ}
n _{Input Bias Current: 300nA Max}
n _{Input Offset Current: 25nA Max}
n _{Low Profile (1mm) SOT-23 (ThinSOT™) Package}
APPLICATIONS
n _{Portable Instrumentation}
n _{Rail-to-Rail Buffer Amplifiers}
n _{Low Voltage Signal Processing}
n _{Driving A/D Converters}
n _{Battery-Powered Systems}
LT1797
10MHz, Rail-to-Rail
Input and Output
Op Amp in SOT-23
DESCRIPTION
The LT^®1797 is a unity-gain stable 10MHz op amp available
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
included 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.
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.
TYPICAL APPLICATION
3.3k
0805
s3
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
Small-Signal Response
V_S = ±2.5V
A_V = 1
R_L = 10k
1797 TA01b
1797fb
1