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Analog Devices - DUAL/QUAD RAIL-TO-RAIL OPERATIONAL AMPLIFIERS

Numéro de référence OP295
Description DUAL/QUAD RAIL-TO-RAIL OPERATIONAL AMPLIFIERS
Fabricant Analog Devices 
Logo Analog Devices 





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OP295 fiche technique
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Dual/Quad Rail-to-Rail
Operational Amplifiers
OP295/OP495
FEATURES
Rail-to-Rail Output Swing
Single-Supply Operation: +3 V to +36 V
Low Offset Voltage: 300 V
Gain Bandwidth Product: 75 kHz
High Open-Loop Gain: 1000 V/mV
Unity-Gain Stable
Low Supply Current/Per Amplifier: 150 A max
APPLICATIONS
Battery Operated Instrumentation
Servo Amplifiers
Actuator Drives
Sensor Conditioners
Power Supply Control
GENERAL DESCRIPTION
Rail-to-rail output swing combined with dc accuracy are the key
features of the OP495 quad and OP295 dual CBCMOS opera-
tional amplifiers. By using a bipolar front end, lower noise and
higher accuracy than that of CMOS designs has been achieved.
Both input and output ranges include the negative supply, pro-
viding the user “zero-in/zero-out” capability. For users of 3.3
volt systems such as lithium batteries, the OP295/OP495 is
specified for three volt operation.
Maximum offset voltage is specified at 300 µV for +5 volt opera-
tion, and the open-loop gain is a minimum of 1000 V/mV. This
yields performance that can be used to implement high accuracy
systems, even in single supply designs.
The ability to swing rail-to-rail and supply +15 mA to the load
makes the OP295/OP495 an ideal driver for power transistors
and “H” bridges. This allows designs to achieve higher efficien-
cies and to transfer more power to the load than previously pos-
sible without the use of discrete components. For applications
PIN CONNECTIONS
8-Lead Narrow-Body SO
(S Suffix)
8-Lead Epoxy DIP
(P Suffix)
OUT A 1
–IN A 2
+IN A 3
V– 4
OP295
8 V+
7 OUT B
6 –IN B
5 +IN B
OUT A 1
–IN A 2
+IN A 3
V– 4
OP295
8 V+
7 OUT B
6 –IN B
5 +IN B
14-Lead Epoxy DIP
(P Suffix)
16-Lead SO (300 Mil)
(S Suffix)
OUT A 1
–IN A 2
+IN A 3
V+ 4
+IN B 5
–IN B 6
OUT B 7
OP495
14 OUT D
13 –IN D
12 +IN D
11 V–
10 +IN C
9 –IN C
8 OUT C
OUT A 1
16 OUT D
–IN A 2
+IN A 3
V+ 4
+IN B 5
OP495
15 –IN D
14 +IN D
13 V–
12 +IN C
–IN B 6
OUT B 7
11 –IN C
10 OUT C
NC 8
9 NC
NC = NO CONNECT
that require driving inductive loads, such as transformers, in-
creases in efficiency are also possible. Stability while driving
capacitive loads is another benefit of this design over CMOS
rail-to-rail amplifiers. This is useful for driving coax cable or
large FET transistors. The OP295/OP495 is stable with loads in
excess of 300 pF.
The OP295 and OP495 are specified over the extended indus-
trial (–40°C to +125°C) temperature range. OP295s are avail-
able in 8-pin plastic and ceramic DIP plus SO-8 surface mount
packages. OP495s are available in 14-pin plastic and SO-16
surface mount packages. Contact your local sales office for
MIL-STD-883 data sheet.
REV. B
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
which may result from its use. No license is granted by implication or
otherwise under any patent or patent rights of Analog Devices.
© Analog Devices, Inc., 1995
One Technology Way, P.O. Box 9106, Norwood. MA 02062-9106, U.S.A.
Tel: 617/329-4700
Fax: 617/326-8703

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