Overview
The OP27EZ 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 OP27EZ is known for its exceptional noise performance, high gain, and stability, which are crucial for accurate high-gain amplification of low-level signals.
Key Specifications
| Parameter | Symbol | Test Conditions | Min | Typ | Max | Unit |
|---|---|---|---|---|---|---|
| Input Offset Voltage | VOS | VS = ±15 V, TA = 25°C | 10 | 25 | 30 | µV |
| Long-term VOS Stability | VOS/Time | TA = 25°C | 0.2 | 1.0 | 0.4 | µV/Month |
| Input Offset Current | IOS | VS = ±15 V, TA = 25°C | 7 | 35 | 12 | nA |
| Input Bias Current | IB | VS = ±15 V, TA = 25°C | ±10 | ±40 | ±15 | nA |
| Input Noise Voltage | en | fO = 10 Hz | 3.5 | 5.5 | nV/√Hz | |
| Slew Rate | SR | RL ≥ 2 kΩ | 2.8 | V/µs | ||
| Gain Bandwidth Product | GBW | 8 | MHz | |||
| Common Mode Rejection Ratio | CMRR | VCM of ±11 V | 126 | dB | ||
| Open-Loop Gain | 1.8 million | |||||
| Supply Voltage | VCC | ±4 | ±15 | ±22 | V | |
| Operating Temperature Range | TA | −55 | 125 | °C |
Key Features
- Low Noise: The OP27EZ features exceptionally low noise with a voltage noise density of 3.5 nV/√Hz at 10 Hz and a low 1/f noise corner frequency of 2.7 Hz.
- High Speed: It has a slew rate of 2.8 V/µs and a gain bandwidth product of 8 MHz, making it suitable for high-speed applications.
- Low Offset and Drift: The device has a low input offset voltage down to 10 µV and a maximum drift of 0.6 µV/°C, ensuring high precision.
- High Open-Loop Gain: With an open-loop gain of 1.8 million, it is ideal for high-gain amplification of low-level signals.
- Excellent CMRR and PSRR: Common mode rejection ratio (CMRR) and power supply rejection ratio (PSRR) exceed 120 dB, ensuring high stability and immunity to common-mode and power supply noise.
- Low Input Bias Current: The input bias current is as low as ±10 nA, which is beneficial for applications with high source resistance.
Applications
- Precision Instrumentation: The OP27EZ is ideal for precision instrumentation applications due to its low noise, high precision, and stability.
- Stable Integrators and Summing Amplifiers: It is used in stable integrators, precision summing amplifiers, and precision voltage threshold detectors.
- Comparators and Professional Audio: The device is suitable for comparators and professional audio circuits such as tape heads and microphone preamplifiers due to its low noise and high gain characteristics.
- High-Speed Data Acquisition Systems: Its high slew rate and gain bandwidth product make it an excellent choice for high-speed data acquisition systems.
Q & A
- What is the typical input offset voltage of the OP27EZ?
The typical input offset voltage of the OP27EZ is 25 µV.
- What is the slew rate of the OP27EZ?
The slew rate of the OP27EZ is 2.8 V/µs.
- What is the gain bandwidth product of the OP27EZ?
The gain bandwidth product of the OP27EZ is 8 MHz.
- What is the common mode rejection ratio (CMRR) of the OP27EZ?
The CMRR of the OP27EZ is 126 dB at VCM of ±11 V.
- What is the operating temperature range of the OP27EZ?
The operating temperature range of the OP27EZ is from −55°C to 125°C.
- What are some typical applications of the OP27EZ?
The OP27EZ is typically used in precision instrumentation, stable integrators, precision summing amplifiers, comparators, and professional audio circuits.
- How does the OP27EZ handle high source resistance inputs?
The OP27EZ uses an input bias-current cancellation circuit to keep input bias and offset currents low, even with high source resistance inputs.
- What is the input noise voltage density of the OP27EZ at 10 Hz?
The input noise voltage density of the OP27EZ at 10 Hz is 3.5 nV/√Hz.
- Is the OP27EZ suitable for high-speed data acquisition systems?
Yes, the OP27EZ is suitable for high-speed data acquisition systems due to its high slew rate and gain bandwidth product.
- Can the OP27EZ replace other operational amplifiers like the 725 or OP07?
Yes, the OP27EZ can replace operational amplifiers like the 725, OP06, OP07, and OP45 due to its compatible specifications and performance.
