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OP297:  Low Bias Current Precision (Dual) Operational Amplifier

Product Details


The OP297 is the first dual op amp to pack precision performance into the space-saving, industry standard 8-pin SO package. Its combination of precision with low power and extremely low input bias current makes the dual OP297 useful in a wide variety of applications.

Precision performance of the OP297 includes very low offset, under 50µV, and low drift, below 0.6µV/°C. Open-loop gain exceeds 2000V/mV insuring high linearity in every application. Errors due to common-mode signals are eliminated by the OP297's common-mode rejection of over 120 dB. The OP297's power supply rejection of over 120dB minimizes offset voltage changes experienced in battery powered systems. Supply current of the OP297 is under 625µA per amplifier and it can operate with supply voltages as low a ±2V.

The OP297 utilizes a super-beta input stage with bias current cancellation to maintain picoamp bias currents at all temperatures. This is in contrast to FET input op amps whose bias currents start in the picoamp range of 25°C, but double for every 10°C rise in temperature, to reach the nanoamp range above 85°C. Input bias current of the OP297 is under 100pA at 25°C and is under 450pA over the military temperature range.

Combining precision, low power and low bias current, the OP297 is ideal for a number of applications including instrumentation amplifiers, log amplifiers, phot-diode preamplifiers and long-term integrators. For a single device, see the OP97; for a quad, see the OP497.

FEATURES and BENEFITS

  • Low Offset Voltage: 50 µV Max
  • Low Offset Voltage Drift: 0.6 µV/°C Max
  • Very Low Bias Current: 100 pA Max
  • Very High Open-Loop Gain: 2000 V/mV Min
  • Low Supply Current (Per Amplifier):
    625 µA Max
  • Operates From ±2 V to ±20 V Supplies
  • High Common-Mode Rejection:
    120 dB Min
  • Pin Compatible to LT1013, AD706,
    AD708, OP221, LM158, and
    MC1458/ 1558 with Improved
    Performance

Pin Configuration Diagram for OP297

Documentation

Title Content Type File Type
OP297: Dual Low Bias Current Precision Operational Amplifier Data Sheet  (Rev G, 04/2008) (pdf, 317 kB) Data Sheets 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

Evaluation Kits & Symbols & Footprints

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Price, packaging, availability

OP297 Model Options
Model Package Pins Temp.
Range
Packing,
Qty
Price*(100-499) Price*1000 pcs RoHS View PCN/ PDN Check Inventory/
Purchase/Sample
OP297EZ Status: Production CERDIP GLASS SEAL 8 Ind Tube, 48 $9.60 $9.12 N  Material Info PCN Purchase
OP297FPZ Status: Production 8 ld PDIP 8 Ind Tube, 50 $3.81 $3.64 Y  Material Info PCN Purchase
OP297FS Status: Production 8 ld SOIC 8 Ind Tube, 98 $4.18 $3.98 N  Material Info PCN Purchase
OP297FS-REEL7 Status: Production 8 ld SOIC 8 Ind Reel, 1000 - $3.98 N  Material Info PCN Purchase
OP297FSZ Status: Production 8 ld SOIC 8 Ind Tube, 98 $3.69 $3.50 Y  Material Info PCN Purchase
OP297FSZ-REEL Status: Production 8 ld SOIC 8 Ind Reel, 2500 - $3.50 Y  Material Info PCN Purchase
OP297FSZ-REEL7 Status: Production 8 ld SOIC 8 Ind Reel, 1000 - $3.50 Y  Material Info PCN Purchase
OP297GPZ Status: Production 8 ld PDIP 8 Ind Tube, 50 $2.85 $2.75 Y  Material Info PCN Purchase
OP297GS Status: Production 8 ld SOIC 8 Ind Tube, 98 $3.20 $2.96 N  Material Info PCN Purchase
OP297GS-REEL Status: Production 8 ld SOIC 8 Ind Reel, 2500 - $2.96 N  Material Info PCN Purchase
OP297GS-REEL7 Status: Production 8 ld SOIC 8 Ind Reel, 1000 - $2.96 N  Material Info PCN Purchase
OP297GSZ Status: Production 8 ld SOIC 8 Ind Tube, 98 $2.82 $2.61 Y  Material Info PCN Purchase
OP297GSZ-REEL Status: Production 8 ld SOIC 8 Ind Reel, 2500 - $2.61 Y  Material Info PCN Purchase
OP297GSZ-REEL7 Status: Production 8 ld SOIC 8 Ind Reel, 1000 - $2.61 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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