FEATURES
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LT1637
1.1MHz, 0.4V/碌s
Over-The-Top Micropower, Rail-To-Rail
Input and Output Op Amp
DESCRIPTIO
The LT
廬
1637 is a rugged op amp that operates on all single
and split supplies with a total voltage of 2.7V to 44V. The
LT1637 has a gain-bandwidth product of 1.1MHz while
drawing less than 250碌A(chǔ) of quiescent current. The LT1637
can be shut down, making the output high impedance and
reducing the quiescent current to only 3碌A(chǔ). The LT1637 is
reverse supply protected: it draws virtually no current for
reverse supply up to 25V. The input range of the LT1637
includes both supplies and the output swings to both
supplies. Unlike most micropower op amps, the LT1637
can drive heavy loads; its rail-to-rail output drives 25mA.
The LT1637 is unity-gain stable into all capacitive loads up
to 4700pF when optional 0.22碌F and 150鈩?compensation
is used.
The LT1637 has a unique input stage that operates and
remains high impedance when above the positive supply.
The inputs take 44V both differential and common mode,
even when operating on a 3V supply. Built-in resistors
protect the inputs for faults below the negative supply up
to 22V. There is no phase reversal of the output for inputs
5V below V
EE
or 44V above V
EE
, independent of V
CC
.
The LT1637 op amp is available in the 8-pin MSOP, PDIP
and SO packages.
, LTC and LT are registered trademarks of Linear Technology Corporation.
Over-The-Top is a trademark of Linear Technology Corporation.
Operates with Inputs Above V
+
Rail-to-Rail Input and Output
Micropower: 250碌A(chǔ) Supply Current Max
Gain-Bandwidth Product: 1.1MHz
Slew Rate: 0.4V/碌s
Low Input Offset Voltage: 350碌V Max
Single Supply Input Range: 鈥?0.4V to 44V
High Output Current: 25mA Min
Specified on 3V, 5V and
鹵15V
Supplies
Output Shutdown
Output Drives 4700pF with Output Compensation
Reverse Battery Protection to 25V
High Voltage Gain: 800V/mV
High CMRR: 110dB
APPLICATIO S
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Battery or Solar Powered Systems:
Portable Instrumentation
Sensor Conditioning
Supply Current Sensing
Battery Monitoring
MUX Amplifiers
4mA to 25mA Transmitters
TYPICAL APPLICATIO
+
4.7碌F
R*
LT1004-1.2
2k
Over-The-Top
TM
Current Source with Shutdown
Switchable Precision Current Source
4V TO 44V
6V
4V
V
SHDN
2V
R
+
LT1637
TP0610
I
OUT
= 1.2
R
e.g., 10mA = 120鈩?/div>
1637 TA01
0V
鈥?/div>
I
OUT
SHDN
10mA
I
OUT
5mA
0mA
*OPTIONAL FOR LOW OUTPUT CURRENTS,
R* = R
U
U
U
Current Source Timing
100碌s/DIV
1637 TA01b
1
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