Overview
The OP27FP is a low-noise, precision operational amplifier produced by Analog Devices Inc. This device combines the low offset and drift characteristics of the OP07 with high speed and low noise, making it ideal for precision instrumentation applications. The OP27FP features exceptionally low noise, high gain, and a high slew rate, which are crucial for accurate high-gain amplification of low-level signals and excellent dynamic accuracy in high-speed data-acquisition systems.
Key Specifications
| Parameter | Symbol | Conditions | Min | Typ | Max | Unit |
|---|---|---|---|---|---|---|
| Input Offset Voltage | VOS | 10 | 25 | 30 | µV | |
| Long-term VOS Stability | VOS/Time | 0.2 | 1.0 | 2.0 | µV/MO | |
| Input Offset Current | IOS | 7 | 35 | 75 | nA | |
| Input Bias Current | IB | ±10 | ±40 | ±80 | nA | |
| Input Noise Voltage | en | fO = 10 Hz | 3.5 | 5.5 | 8.0 | nV/√Hz |
| Slew Rate | SR | RL ≥ 2 kΩ | 2.8 | V/µs | ||
| Gain Bandwidth Product | GBW | 8 | MHz | |||
| Supply Voltage | VS | ±15 | ±22 | V |
Key Features
- Low Noise: 80 nV p-p (0.1 Hz to 10 Hz), 3 nV/√Hz at 10 Hz, with a low 1/f noise corner frequency of 2.7 Hz.
- Low Drift: 0.2 µV/°C, with long-term VOS stability of 0.2 µV/month.
- High Speed: 2.8 V/µs slew rate, 8 MHz gain bandwidth product.
- Low VOS: Input offset voltage down to 10 µV.
- High CMRR: 126 dB at VCM of ±11 V.
- High Open-Loop Gain: 1.8 million.
- Low Input Bias Current: ±10 nA, achieved by a bias-current-cancellation circuit.
- Good Load Driving Capability: Guaranteed swing of ±10 V into 600 Ω and low output distortion.
Applications
- Precision Instrumentation: Ideal for applications requiring low offset and drift, such as stable integrators, precision summing amplifiers, and precision voltage threshold detectors.
- High-Speed Data-Acquisition Systems: Excellent dynamic accuracy due to its high slew rate and gain bandwidth product.
- Professional Audio: Suitable for professional audio circuits such as tape heads and microphone preamplifiers due to its low noise and good load driving capability.
- Comparators: Can be used in comparator circuits requiring high accuracy and low noise.
Q & A
- What is the typical input offset voltage of the OP27FP?
The typical input offset voltage of the OP27FP is 25 µV.
- What is the slew rate of the OP27FP?
The slew rate of the OP27FP is 2.8 V/µs.
- What is the gain bandwidth product of the OP27FP?
The gain bandwidth product of the OP27FP is 8 MHz.
- What is the input noise voltage density of the OP27FP at 10 Hz?
The input noise voltage density of the OP27FP at 10 Hz is 3.5 nV/√Hz.
- What is the maximum supply voltage for the OP27FP?
The maximum supply voltage for the OP27FP is ±22 V.
- What are some common applications of the OP27FP?
The OP27FP is commonly used in precision instrumentation, high-speed data-acquisition systems, professional audio circuits, and comparator circuits.
- What is the typical input bias current of the OP27FP?
The typical input bias current of the OP27FP is ±10 nA.
- How does the OP27FP handle long-term VOS stability?
The OP27FP has a long-term VOS stability of 0.2 µV/month.
- What is the CMRR of the OP27FP at VCM of ±11 V?
The CMRR of the OP27FP at VCM of ±11 V is 126 dB.
- Can the OP27FP drive heavy loads?
Yes, the OP27FP has good load driving capability with a guaranteed swing of ±10 V into 600 Ω and low output distortion.
