Datasheet OP281, OP481 (Analog Devices)

Ultralow Power, Rail-to-Rail Output Operational Amplifiers OP281/OP481 FEATURES PIN CONFIGURATIONS Low supply current: 4 μA/amplifier maximum OUT A 1 8 V+ Single-supply operation: 2.7 V to 12 V –IN A 2 OP281 7 OUT B TOP VIEW Wide input voltage range +IN A 3 6 –IN B (Not to Scale) Rail-to-rail output swing V– 4 5 +IN B
1 0 0 1-
Low offset voltage: 1.5 mV
29 00
No phase reversal
Figure 1. 8-Lead Narrow-Body SOIC
APPLICATIONS
(R Suffix)
Comparator OUT A 1 8 V+ Battery-powered instrumentation –IN A 2 OP281 7 OUT B Safety monitoring TOP VIEW +IN A 3 (Not to Scale) 6 –IN B Remote sensors
2
V– 4 5
-00
+IN B Low voltage strain gage amplifiers
291 00 Figure 2. 8-Lead TSSOP
GENERAL DESCRIPTION
(RU Suffix) The OP281 and OP481 are dual and quad ultralow power
OUT A 1 14 OUT D
single-supply amplifiers featuring rail-to-rail outputs. Each
–IN A 2 13 –IN D
operates from supplies as low as 2.0 V and is specified at +3 V
+IN A 3 12 +IN D OP481
and +5 V single supplies as well as ±5 V dual supplies.
V+ 4 TOP VIEW 11 V– (Not to Scale) +IN B 5 10 +IN C
Fabricated on Analog Devices’ CBCMOS process, the
–IN B 6 9 –IN C
3 OP281/OP481 feature a precision bipolar input and an output 0
OUT B 7 8 OUT C
0 1- 29 that swings to within millivolts of the supplies, continuing to 00 Figure 3. 14-Lead sink or source current up to a voltage equal to the supply voltage. Narrow-Body SOIC Applications for these amplifiers include safety monitoring, (R Suffix) portable equipment, battery and power supply control, and
OUT A 1 14 OUT D
signal conditioning and interfacing for transducers in very low
–IN A 2 13 –IN D
power systems.
+IN A 3 OP481 12 +IN D
The output’s ability to swing rail-to-rail and not increase supply
V+ TOP VIEW 4 11 V– (Not to Scale)
current when the output is driven to a supply voltage enables
+IN B 5 10 +IN C
the OP281/OP481 to be used as comparators in very low power
–IN B 6 9 –IN C
systems. This is enhanced by their fast saturation recovery time. 04
OUT B 7 8 OUT C
0 1- Propagation delays are 250 μs. 029 0 Figure 4. 14-Lead TSSOP The OP281/OP481 are specified over the extended industrial (RU Suffix) 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.
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Document Outline FEATURES APPLICATIONS GENERAL DESCRIPTION PIN CONFIGURATIONS TABLE OF CONTENTS REVISION HISTORY SPECIFICATIONS ELECTRICAL SPECIFICATIONS ABSOLUTE MAXIMUM RATINGS THERMAL RESISTANCE ESD CAUTION TYPICAL PERFORMANCE CHARACTERISTICS APPLICATIONS THEORY OF OPERATION INPUT OVERVOLTAGE PROTECTION INPUT OFFSET VOLTAGE INPUT COMMON-MODE VOLTAGE RANGE CAPACITIVE LOADING MICROPOWER REFERENCE VOLTAGE GENERATOR WINDOW COMPARATOR LOW-SIDE CURRENT MONITOR LOW VOLTAGE HALF-WAVE AND FULL-WAVE RECTIFIERS BATTERY-POWERED TELEPHONE HEADSET AMPLIFIER OUTLINE DIMENSIONS ORDERING GUIDE