OP291GP 查看數據表（PDF） - Analog Devices
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OP291GP Datasheet PDF : 20 Pages
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Micropower Single-Supply
Rail-to-Rail Input/Output Op Amps
OP191/OP291/OP491
FEATURES
Single-Supply Operation: 2.7 V to 12 V
Wide Input Voltage Range
Rail-to-Rail Output Swing
Low Supply Current: 300 A/Amp
Wide Bandwidth: 3 MHz
Slew Rate: 0.5 V/s
Low Offset Voltage: 700 V
No Phase Reversal
APPLICATIONS
Industrial Process Control
Battery-Powered Instrumentation
Power Supply Control and Protection
Telecom
Remote Sensors
Low-Voltage Strain Gage Amplifiers
DAC Output Amplifier
GENERAL DESCRIPTION
The OP191, OP291, and OP491 are single, dual and quad
micropower, single-supply, 3 MHz bandwidth amplifiers fea-
turing rail-to-rail inputs and outputs. All are guaranteed to
operate from a 3 V single supply as well as ± 5 V dual supplies.
Fabricated on Analog Devices’ CBCMOS process, the OP191
family has a unique input stage that allows the input voltage to
safely extend 10 V beyond either supply without any phase inver-
sion or latch-up. The output voltage swings to within millivolts
of the supplies and continues to sink or source current all the
way to the supplies.
Applications for these amplifiers include portable telecom
equipment, power supply control and protection, and interface
for transducers with wide output ranges. Sensors requiring a
rail-to-rail input amplifier include Hall effect, piezo electric, and
resistive transducers.
The ability to swing rail-to-rail at both the input and output
enables designers to build multistage filters in single-supply
systems and maintain high signal-to-noise ratios.
The OP191/OP291/OP491 are specified over the extended
industrial (–40°C to +125°C) temperature range. The OP191
single and OP291 dual amplifiers are available in 8-lead plastic
SO surface mount packages*. The OP491 quad is available in
14-lead DIPs and narrow 14-lead SO packages. Consult factory
for OP491 TSSOP availability.
*The OP291 dual is also available in 8-lead Plastic Dip.
PIN CONFIGURATIONS
8-Lead Narrow-Body SO
8-Lead Narrow-Body SO
1
8
2 OP191 7
3
6
4
5
1
8
2 OP291 7
3
6
4
5
8-Lead Plastic DIP
OUTA 1
–INA 2
+INA 3
–V 4
OP291 8 +V
7 OUTB
6 –INB
5 +INB
14-Lead Plastic DIP
OUTA 1
–INA 2
+INA 3
+V 4
+INB 5
–INB 6
OUTB 7
OP491
14 OUTD
13 –IND
12 +IND
11 –V
10 +INC
9 –INC
8 OUTC
14-Lead SO
OUTA 1
14 OUTD
–INA 2
13 –IND
+INA 3
12 +IND
+V 4 OP491 11 –V
+INB 5
10 +INC
–INB 6
9 –INC
OUTB 7
8 OUTC
14-Lead TSSOP
1
14
2
13
3
12
4 OP491 11
5
10
6
9
7
8
REV. A
Information furnished by Analog Devices is believed to be accurate and
reliable. However, no responsibility is assumed by Analog Devices for its
use, nor for any infringements of patents or other rights of third parties that
may result from its use. No license is granted by implication or otherwise
under any patent or patent rights of Analog Devices.
One Technology Way, P.O. Box 9106, Norwood, MA 02062-9106, U.S.A.
Tel: 781/329-4700
www.analog.com
Fax: 781/326-8703
© Analog Devices, Inc., 2002
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