LT1797
10MHz, Rail-to-Rail
Input and Output
Op Amp in SOT-23
FEATURES
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DESCRIPTIO
Rail-to-Rail Input and Output
Small SOT-23 Package
Gain Bandwidth Product: 10MHz
鈥?0擄C to 85擄C Operation
Slew Rate: 2.25V/碌s
Low Input Offset Voltage: 1.5mV Max
High Output Current: 25mA Min
Specified on 3V, 5V and
鹵5V
Supplies
High Voltage Gain: 1000V/mV 10k Load
High CMRR: 88dB Min
High PSRR: 80dB Min
Input Bias Current: 300nA Max
Input Offset Current: 25nA Max
The LT
廬
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/碌s.
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
鈥?/div>
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.
APPLICATIO S
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Portable Instrumentation
Rail-to-Rail Buffer Amplifiers
Low Voltage Signal Processing
Driving A/D Converters
Battery-Powered Systems
TYPICAL APPLICATION
Fast Compact 鈥?48V Current Sense
V
OUT
= 3V 鈥?0.1鈩?鈥?I
SENSE
I
SENSE
= 0A TO 30A
ACCURACY
鈮?/div>
3%
V
OUT
Q1
FMMT493
30.1鈩?/div>
1%
3.3k
0805
脳3
R1
4.7k
1k
1%
V
S
= 3V
R1 REDUCES Q1 DISSIPATION
LT1797
0.1碌F
SETTLES TO 1% IN 2碌s,
1V OUTPUT STEP
BZX84C6V8
V
Z
= 6.8V
鈥?8V SUPPLY
(鈥?2V TO 鈥?6V)
0.003鈩?/div>
1% 3W
鈥?/div>
I
SENSE
+
1797 TA01
鈥?8V LOAD
U
+
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