OP297FS
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Analog Devices Inc. OP297FS

Manufacturer No:
OP297FS
Manufacturer:
Analog Devices Inc.
Package:
Tube
Description:
IC OPAMP GP 2 CIRCUIT 8SOIC
Delivery:
Payment:
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Product Introduction

Overview

The OP297FS, produced by Analog Devices Inc., is a dual low bias current precision operational amplifier. It is the first dual op amp to combine precision performance with low power and extremely low input bias current in an industry-standard 8-lead SOIC package. This makes the OP297FS highly versatile and suitable for a wide range of applications. The amplifier features very low offset voltage (less than 50 μV), low drift (less than 0.6 μV/°C), and high open-loop gain (exceeding 2000 V/mV), ensuring high linearity and stability in various operating conditions.

Key Specifications

Parameter Symbol Conditions Min Typ Max Unit
Input Offset Voltage VOS 25 50 200 μV
Average Input Offset Voltage Drift TCVOS 0.2 0.6 2.0 μV/°C
Input Offset Current IOS VCM = 0 V 20 100 200 pA
Input Bias Current IB VCM = 0 V 20 100 450 pA
Large Signal Voltage Gain AVO VOUT = ±10 V, RL = 2 kΩ 1200 3200 V/mV
Supply Current (per amplifier) ISY 625 μA
Common-Mode Rejection Ratio CMR 120 dB
Operating Temperature Range -40 85 °C

Key Features

  • Very low input bias current: under 100 pA at 25°C and under 450 pA over the military temperature range.
  • High open-loop gain: exceeding 2000 V/mV, ensuring high linearity.
  • Low offset voltage: less than 50 μV, and low drift: less than 0.6 μV/°C.
  • High common-mode rejection ratio: over 120 dB, minimizing offset voltage changes in battery-powered systems.
  • Low supply current: under 625 μA per amplifier.
  • Operates with supply voltages as low as ±2 V and can swing output to within 1 V of the rails.
  • Super-beta input stage with bias current cancellation to maintain picoamp bias currents at all temperatures.

Applications

  • Instrumentation amplifiers
  • Log amplifiers
  • Strain gage and bridge amplifiers
  • High stability thermocouple amplifiers
  • Photocurrent monitors
  • High gain linearity amplifiers
  • Long-term integrators/filters
  • Sample-and-hold amplifiers
  • Peak detectors
  • Logarithmic amplifiers
  • Battery-powered systems

Q & A

  1. What is the typical input offset voltage of the OP297FS?

    The typical input offset voltage is less than 50 μV.

  2. What is the input bias current of the OP297FS at 25°C?

    The input bias current is under 100 pA at 25°C.

  3. What is the common-mode rejection ratio of the OP297FS?

    The common-mode rejection ratio is over 120 dB.

  4. What is the supply current per amplifier for the OP297FS?

    The supply current is under 625 μA per amplifier.

  5. What is the operating temperature range of the OP297FS?

    The operating temperature range is from -40°C to +85°C.

  6. Can the OP297FS operate with low supply voltages?

    Yes, it can operate with supply voltages as low as ±2 V.

  7. What types of applications is the OP297FS suitable for?

    The OP297FS is suitable for instrumentation amplifiers, log amplifiers, strain gage and bridge amplifiers, and many other precision applications.

  8. How does the OP297FS handle capacitive loading?

    The OP297FS is extremely tolerant of capacitive loading on the output, displaying excellent response with 1000 pF loads.

  9. What package type is the OP297FS available in?

    The OP297FS is available in an 8-lead SOIC package.

  10. Is the OP297FS pin-compatible with other op amps?

    Yes, it is pin-compatible with op amps like LT1013, AD706, AD708, OP221, LM158, and MC1458/1558.

Product Attributes

Amplifier Type:General Purpose
Number of Circuits:2
Output Type:- 
Slew Rate:0.15V/µs
Gain Bandwidth Product:500 kHz
-3db Bandwidth:- 
Current - Input Bias:35 pA
Voltage - Input Offset:50 µV
Current - Supply:525µA (x2 Channels)
Current - Output / Channel:- 
Voltage - Supply Span (Min):4 V
Voltage - Supply Span (Max):40 V
Operating Temperature:-40°C ~ 85°C
Mounting Type:Surface Mount
Package / Case:8-SOIC (0.154", 3.90mm Width)
Supplier Device Package:8-SOIC
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Similar Products

Part Number OP297FS OP297FZ OP297FSZ OP297GS OP293FS OP297FP
Manufacturer Analog Devices Inc. Analog Devices Inc. Analog Devices Inc. Analog Devices Inc. Analog Devices Inc. Analog Devices Inc.
Product Status Obsolete Active Active Obsolete Obsolete Obsolete
Amplifier Type General Purpose General Purpose General Purpose General Purpose General Purpose General Purpose
Number of Circuits 2 2 2 2 1 2
Output Type - - - - - -
Slew Rate 0.15V/µs 0.15V/µs 0.15V/µs 0.15V/µs 0.015V/µs 0.15V/µs
Gain Bandwidth Product 500 kHz 500 kHz 500 kHz 500 kHz 35 kHz 500 kHz
-3db Bandwidth - - - - - -
Current - Input Bias 35 pA 35 pA 35 pA 50 pA 20 nA 35 pA
Voltage - Input Offset 50 µV 50 µV 50 µV 80 µV 250 µV 50 µV
Current - Supply 525µA (x2 Channels) 525µA (x2 Channels) 525µA (x2 Channels) 525µA (x2 Channels) - 525µA (x2 Channels)
Current - Output / Channel - - - - 25 mA -
Voltage - Supply Span (Min) 4 V 4 V 4 V 4 V 1.7 V 4 V
Voltage - Supply Span (Max) 40 V 40 V 40 V 40 V 36 V 40 V
Operating Temperature -40°C ~ 85°C -40°C ~ 85°C -40°C ~ 85°C -40°C ~ 85°C -40°C ~ 125°C -40°C ~ 85°C
Mounting Type Surface Mount Through Hole Surface Mount Surface Mount Surface Mount Through Hole
Package / Case 8-SOIC (0.154", 3.90mm Width) 8-CDIP (0.300", 7.62mm) 8-SOIC (0.154", 3.90mm Width) 8-SOIC (0.154", 3.90mm Width) 8-SOIC (0.154", 3.90mm Width) 8-DIP (0.300", 7.62mm)
Supplier Device Package 8-SOIC 8-CERDIP 8-SOIC 8-SOIC 8-SOIC 8-PDIP

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