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OP491:  Micropower Single-Supply RRIO Quad 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 Vµs
  • Low Offset Voltage: 700 µ V
  • No Phase Reversal

Pin Configuration Diagram for OP491

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
AN-357: Operational Integrators  (pdf, 272 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
RAQs index Rarely Asked Questions HTML
Glossary of EE Terms Glossary HTML

Design Tools,Models,Drivers & Software

Title Content Type File Type
OP491 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

OP491 Model Options
Model Package Pins Temp.
Range
Packing,
Qty
Price*(100-499) Price*1000 pcs RoHS View PCN/ PDN Check Inventory/
Purchase/Sample
OP491GPZ Status: Production 14 ld PDIP 14 Ind Tube, 25 $4.34 $3.89 Y  Material Info PCN Purchase
OP491GRUZ-REEL Status: Production 14 ld TSSOP 14 Ind Reel, 2500 - $3.89 Y  Material Info PCN Purchase
OP491GS-REEL7 Status: Production 14 ld SOIC 14 Ind Reel, 1000 - $4.49 N  Material Info PCN Purchase
OP491GSZ Status: Production 14 ld SOIC 14 Ind Tube, 56 $4.34 $3.89 Y  Material Info PCN Purchase
OP491GSZ-REEL Status: Production 14 ld SOIC 14 Ind Reel, 2500 - $3.89 Y  Material Info PCN Purchase
OP491GSZ-REEL7 Status: Production 14 ld SOIC 14 Ind Reel, 1000 - $3.89 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-4 Evaluation Board
Model Description Price RoHS View PCN/ PDN Check Inventory/
Purchase/Sample
EVAL-PRAOPAMP-4RUZ Status: Production QUAD 14-Lead TSSOP Evaluation Board $20.19 Yes -
EVAL-PRAOPAMP-4RZ Status: Production QUAD R-14 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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