OP281 Datasheet, PDF (1/16 Pages) Analog Devices – Ultralow Power, Rail-to-Rail Output Operational Amplifiers

Ultralow Power, Rail-to-Rail Output
Operational Amplifiers
OP281/OP481
FEATURES
Low Supply Current: 4 ␮A/Amplifier Max
Single-Supply Operation: 2.7 V to 12 V
Wide Input Voltage Range
Rail-to-Rail Output Swing
Low Offset Voltage: 1.5 mV
No Phase Reversal
APPLICATIONS
Comparator
Battery-Powered Instrumentation
Safety Monitoring
Remote Sensors
Low Voltage Strain Gage Amplifiers
PIN CONFIGURATIONS
8-Lead SOIC
(R Suffix)
8-Lead TSSOP
(RU Suffix)
OUT A
–IN A
+IN A
V–
1
8
OP281
4
5
V+
OUT B
–IN B
+IN B
1
8
OP281
4
5
14-Lead
Narrow-Body SOIC
(R Suffix)
14-Lead TSSOP
(RU Suffix)
GENERAL DESCRIPTION
The OP281 and OP481 are dual and quad ultralow power, single-
supply amplifiers featuring rail-to-rail outputs. Each operates
from supplies as low as 2.0 V and are specified at +3 V and +5 V
single supply as well as ± 5 V dual supplies.
Fabricated on Analog Devices’ CBCMOS process, the
OP281/OP481 features a precision bipolar input and an output
that 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 safety monitoring,
portable equipment, battery and power supply control, and
signal conditioning and interfacing for transducers in very low
power systems.
The output’s ability to swing rail-to-rail and not increase supply
current, when the output is driven to a supply voltage, enables
the OP281/OP481 to be used as comparators in very low power
systems. This is enhanced by their fast saturation recovery time.
Propagation delays are 250 ms.
The OP281/OP481 are specified over the extended industrial
temperature range (–40∞C to +85∞C). The OP281 dual amplifier
is available in 8-lead SOIC surface-mount and TSSOP packages.
The OP481 quad amplifier is available in narrow 14-lead SOIC
and TSSOP packages.
OUT A
–IN A
+IN A
V+
+IN B
–IN B
OUT B
1 14
OP481
7
8
OUT D
–IN D
+IN D
V–
+IN C
–IN C
OUT C
NOTE: PIN ORIENTATION IS EQUIVALENT FOR
EACH PACKAGE VARIATION
1
14
OP481
7
8
REV. B
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