Overview
The OP297FS-REEL7, 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, making it highly versatile for various applications. The OP297 is packaged in an industry-standard 8-lead SOIC package, which is space-saving and pin-compatible with several other operational amplifiers like the LT1013, AD706, AD708, OP221, LM158, and MC1458/1558, but with improved performance.
Key Specifications
| Parameter | Symbol | Conditions | Min | Typ | Max | Unit |
|---|---|---|---|---|---|---|
| Input Offset Voltage | VOS | VS = ±15 V, -40°C ≤ TA ≤ +85°C | 25 | 50 | 80 | 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 | 200 | pA |
| Large Signal Voltage Gain | AVO | VOUT = ±10 V, RL = 2 kΩ | 1200 | 3200 | - | V/mV |
| Input Voltage Range | VCM | - | -13 | -13.5 | - | V |
| Supply Current (per amplifier) | - | - | - | 625 | μA | |
| Common-Mode Rejection Ratio | CMR | - | - | 120 | dB |
Key Features
- Low Offset Voltage: Maximum of 50 μV, ensuring high precision in applications.
- Low Offset Voltage Drift: Maximum of 0.6 μV/°C, providing stability over temperature changes.
- Very Low Bias Current: Maximum of 100 pA, ideal for applications requiring minimal input current.
- High Open-Loop Gain: Minimum of 2000 V/mV, ensuring high linearity in every application.
- Low Supply Current: Maximum of 625 μA per amplifier, suitable for battery-powered systems.
- High Common-Mode Rejection Ratio: Minimum of 120 dB, minimizing offset voltage changes.
- Wide Supply Voltage Range: Operates from ±2 V to ±20 V supplies.
- Excellent AC Performance: Highly stable over the full operating temperature range, tolerant of capacitive loading.
Applications
- Strain Gage and Bridge Amplifiers: High accuracy and stability make it ideal for these applications.
- High Stability Thermocouple Amplifiers: Suitable for thermocouple measurements due to its low drift and high precision.
- Instrumentation Amplifiers: Used in various instrumentation applications requiring high precision and low noise.
- Photo-Current Monitors: Ideal for monitoring photocurrents due to its low bias current.
- High Gain Linearity Amplifiers: Ensures high linearity in applications requiring high gain.
- Long-Term Integrators/Filters: Suitable for long-term integration and filtering tasks.
- Sample-and-Hold Amplifiers: Low bias current makes it suitable for sample-and-hold applications.
- Peak Detectors: Used in peak detection circuits due to its high precision and stability.
- Logarithmic Amplifiers: Ideal for nonlinear circuits such as logarithmic amplifiers.
- Battery-Powered Systems: Low power consumption makes it suitable for battery-powered systems.
Q & A
- What is the maximum input offset voltage of the OP297?
The maximum input offset voltage of the OP297 is 50 μV.
- What is the typical input bias current of the OP297?
The typical input bias current of the OP297 is 100 pA.
- What is the minimum open-loop gain of the OP297?
The minimum open-loop gain of the OP297 is 2000 V/mV.
- What is the maximum supply current per amplifier for the OP297?
The maximum supply current per amplifier for the OP297 is 625 μA.
- What is the common-mode rejection ratio (CMR) of the OP297?
The common-mode rejection ratio (CMR) of the OP297 is a minimum of 120 dB.
- What is the operating supply voltage range for the OP297?
The OP297 operates from ±2 V to ±20 V supplies.
- Is the OP297 suitable for battery-powered systems?
Yes, the OP297 is suitable for battery-powered systems due to its low power consumption and low bias current.
- What are some common applications of the OP297?
The OP297 is commonly used in strain gage and bridge amplifiers, high stability thermocouple amplifiers, instrumentation amplifiers, photo-current monitors, and other precision applications.
- How does the OP297 perform in terms of AC characteristics?
The OP297 displays highly stable AC characteristics over its full operating temperature range and is tolerant of capacitive loading on the output.
- Is the OP297 pin-compatible with other operational amplifiers?
Yes, the OP297 is pin-compatible with several other operational amplifiers such as the LT1013, AD706, AD708, OP221, LM158, and MC1458/1558.
