Overview
The OP97FS-REEL7, produced by Analog Devices Inc., is a low-power, high-precision operational amplifier designed as a low-power alternative to the industry-standard OP07 precision amplifier. It maintains the performance standards of the OP07 while utilizing significantly less supply current, making it ideal for applications in precision long-term integrators, sample-and-hold circuits, and other high-precision analog circuits that operate over a wide temperature range.
Key Specifications
| Parameter | Symbol | Conditions | Min | Max | Unit | |
|---|---|---|---|---|---|---|
| Input Offset Voltage | VOS | 10 | 25 | 30 | µV | |
| Input Offset Voltage Drift | TCVOS | 0.2 | 0.6 | 2.0 | µV/°C | |
| Input Bias Current | IB | 25°C | ±30 | ±100 | ±150 | pA |
| Input Noise Voltage Density | en | fO = 10 Hz | 17 | 30 | nV/√Hz | |
| Supply Current | ISY | 380 | 600 | µA | ||
| Supply Voltage Range | VS | ±2.25 | ±20 | V | ||
| Common-Mode Rejection Ratio | CMR | VCM = ±13.5 V | 108 | 114 | dB | |
| Power Supply Rejection Ratio | PSR | VS = ±2.5 V to ±20 V | 108 | 126 | dB | |
| Slew Rate | SR | 0.05 | 0.15 | V/µs |
Key Features
- Low supply current: 600 µA maximum, significantly less than the OP07.
- Ultralow input offset voltage: 25 µV maximum, with a drift of 0.6 µV/°C.
- Very low bias current: 100 pA maximum at 25°C and 250 pA maximum over the full military temperature range.
- High common-mode rejection ratio: 114 dB minimum.
- High power supply rejection ratio: 108 dB to 126 dB over a wide supply voltage range.
- Extended industrial temperature range: –40°C to +85°C.
- No external offset trimming required in most circuits due to the extremely low offset voltage.
- Input pins protected against large differential voltages by back-to-back diodes.
- Conforms to OP07 pinout, making it a direct replacement in many applications.
Applications
- Precision long-term integrators and sample-and-hold circuits that must operate at elevated temperatures.
- Portable and battery-powered instruments due to its minimal power requirements.
- Sample-and-hold amplifiers, peak detectors, and log amplifiers that operate over a wide temperature range.
- Circuit designs using AD725, OP05, OP07, OP12, and PM1012 type amplifiers, offering improved performance and/or less power dissipation.
- Replacement for 741-type amplifiers in circuits without nulling or where nulling circuitry has been removed.
Q & A
- What is the primary advantage of the OP97 over the OP07?
The OP97 offers significantly lower supply current (600 µA maximum) compared to the OP07, while maintaining similar performance standards.
- What is the input offset voltage of the OP97?
The input offset voltage of the OP97 is 25 µV maximum.
- What is the temperature range for the OP97?
The OP97 operates over an extended industrial temperature range of –40°C to +85°C.
- What is the common-mode rejection ratio of the OP97?
The common-mode rejection ratio of the OP97 is 114 dB minimum.
- Can the OP97 replace 741-type amplifiers?
- What is the slew rate of the OP97?
The slew rate of the OP97 is 0.05 V/µs to 0.15 V/µs.
- Does the OP97 require external offset trimming?
No, external offset trimming is not required in the majority of circuits due to the extremely low offset voltage of the OP97.
- What is the supply voltage range for the OP97?
The supply voltage range for the OP97 is ±2.25 V to ±20 V.
- Is the OP97 suitable for portable and battery-powered instruments?
- How is the input protection for the OP97?
The input pins of the OP97 are protected against large differential voltages by back-to-back diodes.
