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OP285:  9 MHz Precision Dual Operational Amplifier

Product Details


Newer Alternatives:
  • ADA4075-2 with greatly improved noise, lower offset and much lower quiescent power in narrow 8-lead SOIC and tiny 2mm x 2mm LFCSP packages

The OP285 is a precision high speed amplifier featuring the Butler Amplifier front-end. This new front-end design combines the accuracy and low noise performance of bipolar transistors with the speed of JFETs. This yeilds an amplifier with high slew rates, low offset and good noise performance at low supply currents. Bias currents are also low compared to bipolar designs.

The OP285 offers the slew rate and low power of a JFET amplifier combined with the precision, low noise and low drift of a bipolar amplifier. Input offset voltage is laser-trimmed and guaranteed less than 250 µV. This makes the OP285 useful in dc coupled or summing applications without the need for special selections or the added noise of additional offset adjustment circuitry. Slew rates of 22V/µs and a bandwidth of 9MHz make the OP285 one of the most accurate medium speed amplifiers available.

The combination of low noise, speed and accuracy can be used to build high speed instrumentation systems. Circuits such as instrumentation amplifiers, ramp generators, bi-quad filters and dc coupled audio systems are all practical with the OP285.

For applications that require long term stability, the OP285 has a guaranteed maximum long term drift specification.

The OP285 is specified over the XIND-extended industrial (-40°C to +85°C) temperature range. OP285s are available in 8-pin plastic DIP and SOIC-8 surface mount packages.

FEATURES and BENEFITS

  • Low Offset Voltage: 250 µV
  • Low Noise: 6 nV/√Hz
  • Low Distortion: 0.0006%
  • High Slew Rate: 22 V/µs
  • Wide Bandwidth: 9 MHz
  • Low Supply Current: 5 mA
  • Low Offset Current: 2 nA
  • Unity-Gain Stable
  • SO-8 Package

Pin Configuration Diagram for OP285

Documentation

Title Content Type File Type
OP285: Dual, 9 MHz Precision Operational Amplifier Data Sheet  (Rev A, 01/2002) (pdf, 236 kB) Data Sheets PDF
AN-940: Low Noise Amplifier Selection Guide for Optimal Noise Performance  (pdf, 199 kB) Application Notes PDF
AN-649: Using the Analog Devices Active Filter Design Tool  (pdf, 5301 kB) Application Notes PDF
RAQs index Rarely Asked Questions HTML
Glossary of EE Terms Glossary HTML

Design Tools,Models,Drivers & Software

Title Content Type File Type
OP285 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

OP285 Model Options
Model Package Pins Temp.
Range
Packing,
Qty
Price*(100-499) Price*1000 pcs RoHS View PCN/ PDN Check Inventory/
Purchase/Sample
OP285GS Status: Production 8 ld SOIC 8 Ind Tube, 98 $3.06 $2.77 N  Material Info PCN Purchase
OP285GS-REEL Status: Production 8 ld SOIC 8 Ind Reel, 2500 - $2.77 N  Material Info PCN Purchase
OP285GS-REEL7 Status: Production 8 ld SOIC 8 Ind Reel, 1000 - $2.77 N  Material Info PCN Purchase
OP285GSZ Status: Production 8 ld SOIC 8 Ind Tube, 98 $2.70 $2.45 Y  Material Info PCN Purchase
OP285GSZ-REEL Status: Production 8 ld SOIC 8 Ind Reel, 2500 - $2.45 Y  Material Info PCN Purchase
OP285GSZ-REEL7 Status: Production 8 ld SOIC 8 Ind Reel, 1000 - $2.45 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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