1637 데이터 시트보기 (PDF) - Linear Technology
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1637 Datasheet PDF : 16 Pages
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LT1637
1.1MHz, 0.4V/µs
Over-The-Top Micropower, Rail-To-Rail
Input and Output Op Amp
FEATURES
s Operates with Inputs Above V +
s Rail-to-Rail Input and Output
s Micropower: 250µA Supply Current Max
s Operating Temperature Range: – 40°C to 125°C
s Gain-Bandwidth Product: 1.1MHz
s Slew Rate: 0.4V/µs
s Low Input Offset Voltage: 350µV Max
s Single Supply Input Range: – 0.4V to 44V
s High Output Current: 25mA Min
s Specified on 3V, 5V and ±15V Supplies
s Output Shutdown
s Output Drives 4700pF with Output Compensation
s Reverse Battery Protection to 25V
s High Voltage Gain: 800V/mV
s High CMRR: 110dB
U
APPLICATIO S
s Battery or Solar Powered Systems:
Portable Instrumentation
Sensor Conditioning
s Supply Current Sensing
s Battery Monitoring
s MUX Amplifiers
s 4mA to 25mA Transmitters
DESCRIPTIO
The LT®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 250µA of quiescent current. The LT1637
can be shut down, making the output high impedance and
reducing the quiescent current to only 3µA. 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 0.22µF and 150Ω 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 VEE or 44V above VEE, independent of VCC.
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.
TYPICAL APPLICATIO
Over-The-TopTM Current Source with Shutdown
Switchable Precision Current Source
+
4.7µF
R*
+
LT1004-1.2
2k
4V TO 44V
R
6V
4V
VSHDN
2V
0V
Current Source Timing
LT1637
–
TP0610
IOUT
=
1.2
R
IOUT e.g., 10mA = 120Ω
10mA
IOUT 5mA
SHDN
*OPTIONAL FOR LOW OUTPUT CURRENTS,
R* = R
1637 TA01
0mA
100µs/DIV
1637 TA01b
1
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