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OP291:  Micropower Single-Supply RRIO Dual Op Amp

Product Details


Newer Alternatives:
  • ADA4091-2 and ADA4091-4 next generation with 30V operation, input overvoltage protection, higher bandwidth, and lower noise and offset
  • ADA4092-4 for a lower cost version

The OP191, OP291 and OP491 are single, dual and quad micropower, single-supply, 3 MHz bandwidth amplifiers featuring rail-to-rail inputs and outputs. All are guaranteed to operate from a 3 volt single supply as well as ±5 volt 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 volts beyond either supply without any phase inversion 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-pin plastic DIPs and SO surface mount packages. The OP491 quad is available in 14-pin DIPs and narrow 14-pin SO packages. Consult factory for OP491 TSSOP availability.

FEATURES and BENEFITS

  • Single-Supply Operation: 2.7 V to 12 V
  • Wide Input Voltage Range
  • Rail-to-Rail Output Swing
  • Low Supply Current: 300 µA/Amp
  • Wide Bandwidth: 3 MHz
  • Slew Rate: 0.5 V/µs
  • Low Offset Voltage: 700 µV
  • No Phase Reversal

Pin Configuration Diagram for OP291

Documentation

Title Content Type File Type
OP191/OP291/OP491: Micropower Single-Supply Rail-to-Rail Input/Output Op Amps Data Sheet  (Rev E, 04/2010) (pdf, 599 kB) Data Sheets PDF
AN-649: Using the Analog Devices Active Filter Design Tool  (pdf, 5301 kB) Application Notes PDF
Low-Power, Low-Voltage IC Choices for ECG System Requirements
(Analog Dialogue, Vol. 29, No. 3, 1995)
Technical Articles HTML
Low-Power, Low-Voltage IC Choices for ECG System Requirements
(Analog Dialogue, Vol. 29, No. 3, 1995)
Analog Dialogue HTML
ICs for Programmable Logic Control and Distributed Control Systems  (pdf, 976 kB)
Analog Devices leadership in industrial IC technology, with the development of the iCMOS™ and iPolar™ processes, has uniquely defined high voltage and low voltage integration to deliver smaller, higher performance, and more cost effective ICs for industrial systems.
Overview PDF
RAQs index Rarely Asked Questions HTML
Glossary of EE Terms Glossary HTML

Design Tools,Models,Drivers & Software

Title Content Type File Type
OP291 SPICE Macro-Model SPICE Models HTML

Evaluation Kits & Symbols & Footprints

Evaluation Boards & KitsView the Evaluation Boards and Kits page for documentation and purchasing

Symbols and Footprints— Analog Devices offers Symbols & Footprints which are compatible with a large set of today’s CAD systems for broader and easier support.

SampleSample & Buy

Price, packaging, availability

OP291 Model Options
Model Package Pins Temp.
Range
Packing,
Qty
Price*(100-499) Price*1000 pcs RoHS View PCN/ PDN Check Inventory/
Purchase/Sample
OP291GS Status: Production 8 ld SOIC 8 Ind Tube, 98 $2.82 $2.56 N  Material Info PCN Purchase
OP291GS-REEL Status: Last Time Buy 8 ld SOIC 8 Ind Reel, 2500 - $2.56 N  Material Info PCN/PDN Purchase
OP291GS-REEL7 Status: Production 8 ld SOIC 8 Ind Reel, 1000 - $2.56 N  Material Info PCN Purchase
OP291GSZ Status: Production 8 ld SOIC 8 Ind Tube, 98 $2.45 $2.22 Y  Material Info PCN Purchase
OP291GSZ-REEL Status: Production 8 ld SOIC 8 Ind Reel, 2500 - $2.22 Y  Material Info PCN Purchase
OP291GSZ-REEL7 Status: Production 8 ld SOIC 8 Ind Reel, 1000 - $2.22 Y  Material Info PCN Purchase
Price Table Help

The USA list pricing shown is for BUDGETARY USE ONLY, shown in United States dollars (FOB USA per unit for the stated volume), and is subject to change. International prices may differ due to local duties, taxes, fees and exchange rates. For volume-specific price or delivery quotes, please contact your local Analog Devices, Inc. sales office or authorized distributor. Pricing displayed for Evaluation Boards and Kits is based on 1-piece pricing.

EVAL-OPAMP-2 Evaluation Board
Model Description Price RoHS View PCN/ PDN Check Inventory/
Purchase/Sample
EVAL-PRAOPAMP-2CPZ Status: Production Dual CP-8 lead LFCSP Evaluation Board $20.19 Yes -
EVAL-PRAOPAMP-2RMZ Status: Production Dual RM-8 lead MSOP Evaluation Board $20.19 Yes -
EVAL-PRAOPAMP-2RZ Status: Production Dual R-8 lead SOIC Evaluation Board $20.19 Yes -

Pricing displayed is based on 1-piece. The USA list pricing shown is for budgetary use only, shown in United States dollars (FOB USA per unit), and is subject to change. International prices may vary due to local duties, taxes, fees and exchange rates.

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