Overview
The OP297GPZ, 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 consumption and extremely low input bias current, all packaged in an industry-standard 8-lead SOIC package. This combination makes the OP297GPZ highly versatile and suitable for a wide range of applications. The device features very low offset voltage, low drift, and high open-loop gain, ensuring high linearity and accuracy in various operational scenarios.
Key Specifications
| Parameter | Symbol | Conditions | Min | Typ | Max |
|---|---|---|---|---|---|
| Input Offset Voltage | VOS | 25 | 50 | 100 | |
| Average Input Offset Voltage Drift | TCVOS | 0.2 | 0.6 | 2.0 | |
| Input Offset Current | IOS | VCM = 0 V | 20 | 100 | 200 |
| Input Bias Current | IB | VCM = 0 V | 20 | 100 | 200 |
| Large Signal Voltage Gain | AVO | VOUT = ±10 V, RL = 2 kΩ | 1200 | 3200 | 2500 |
| Supply Current (per amplifier) | 625 | ||||
| Common-Mode Rejection | CMR | 120 |
Key Features
- Very low input bias current: less than 100 pA maximum.
- High open-loop gain: minimum of 2000 V/mV, ensuring high linearity.
- Low supply current: under 625 μA per amplifier.
- High common-mode rejection: over 120 dB, minimizing offset voltage changes.
- Low offset voltage and drift: less than 50 μV and 0.6 μV/°C respectively.
- Operates from ±2 V to ±20 V supplies with minimal operating headroom.
- Excellent stability over the full operating temperature range.
Applications
- Strain gage and bridge amplifiers.
- High stability thermocouple amplifiers.
- Instrumentation amplifiers.
- Photocurrent monitors.
- High gain linearity amplifiers.
- Long-term integrators/filters.
- Sample-and-hold amplifiers.
- Peak detectors.
- Logarithmic amplifiers.
- Battery-powered systems.
Q & A
- What is the input bias current of the OP297GPZ?
The input bias current of the OP297GPZ is less than 100 pA maximum.
- What is the open-loop gain of the OP297GPZ?
The open-loop gain of the OP297GPZ exceeds 2000 V/mV minimum.
- What is the common-mode rejection ratio (CMR) of the OP297GPZ?
The CMR of the OP297GPZ is over 120 dB).
- What is the supply current per amplifier for the OP297GPZ?
The supply current per amplifier for the OP297GPZ is under 625 μA).
- What are the typical operating supply voltages for the OP297GPZ?
The OP297GPZ operates from ±2 V to ±20 V supplies).
- What are some common applications of the OP297GPZ?
Common applications include strain gage and bridge amplifiers, high stability thermocouple amplifiers, instrumentation amplifiers, and more).
- How does the OP297GPZ handle capacitive loading?
The OP297GPZ is extremely tolerant of capacitive loading on the output, displaying excellent response with loads up to 1000 pF).
- What is the input offset voltage of the OP297GPZ?
The input offset voltage of the OP297GPZ is less than 50 μV).
- How does the input bias current of the OP297GPZ vary with temperature?
The input bias current of the OP297GPZ remains under 100 pA over the full operating temperature range, unlike FET input op amps which increase significantly with temperature).
- Is the OP297GPZ suitable for battery-powered systems?
Yes, the OP297GPZ is suitable for battery-powered systems due to its low supply current and high common-mode rejection ratio).
