تقویت کننده ی عملیاتی OP297G (اورجینال)

تقویت کننده ی عملیاتی OP297G (اورجینال)

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Description

The OP297 is the first dual op amp to pack precision performance into the space-saving, industry-standard, 8-lead SOIC 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 50 µV, and low drift, below 0.6 µV/°C. Open-loop gain exceeds 2000 V/mV, ensuring high linearity in every application.
Errors due to common-mode signals are eliminated by the OP297’s common-mode rejection of over 120 dB, which minimizes offset voltage changes experienced in battery-powered systems. Supply current of the OP297 is under 625 µA per amplifier, and the part can operate with supply voltages as low as ±2 V.
The OP297 uses 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 at 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 100 pA at 25°C and is under 450 pA 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, photodiode preamplifiers, and long term integrators. For a single device, see the OP97; for a quad, see the OP497.

FEATURES

Low Offset Voltage: 50
V Max
Low Offset Voltage Drift: 0.6
V/C Max
Very Low Bias Current: 100 pA Max
Very High Open-Loop Gain: 2000 V/mV Min
Low Supply Current (Per Amplifier): 625
A 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

APPLICATIONS

Strain Gage and Bridge Amplifiers
High Stability Thermocouple Amplifiers
Instrumentation Amplifiers
Photo-Current Monitors
High Gain Linearity Amplifiers
Long-Term Integrators/Filters
Sample-and-Hold Amplifiers
Peak Detectors
Logarithmic Amplifiers
Battery-Powered Systems