Overview
The OP270FZ is a high-performance, monolithic, dual operational amplifier produced by Analog Devices Inc. It is known for its exceptionally low voltage noise density of 5 nV/√Hz maximum at 1 kHz, making it suitable for applications requiring low noise and high precision. The OP270FZ offers comparable performance to the industry-standard OP27, with improvements in several key areas such as lower power consumption and excellent amplifier matching.
Key Specifications
| Parameter | Symbol | Test Conditions | Min | Typ | Max | Unit |
|---|---|---|---|---|---|---|
| Input Offset Voltage | VOS | VS = ±15 V, −40°C ≤ TA ≤ 85°C | 100 | 275 | 400 | μV |
| Average Input Offset Voltage Drift | TCVOS | −40°C ≤ TA ≤ 85°C | 0.7 | 2 | 3 | μV/°C |
| Input Offset Current | IOS | VCM = 0 V | 15 | 40 | 50 | nA |
| Input Bias Current | IB | VCM = 0 V | 19 | 70 | 80 | nA |
| Large-Signal Voltage Gain | AVO | VO = ±10 V, RL = 10 kΩ | 400 | 1250 | V/mV | |
| Common-Mode Rejection Ratio | CMR | 106 | dB | |||
| Slew Rate | 2.4 | V/μs | ||||
| Gain Bandwidth Product | 5 | MHz |
Key Features
- Exceptionally low voltage noise density of 5 nV/√Hz maximum at 1 kHz.
- Low input offset voltage of less than 75 μV and an offset drift of less than 1 μV/°C.
- High open-loop gain of more than 1,500,000 into a 10 kΩ load.
- Low input bias current of less than 20 nA.
- High common-mode rejection ratio (CMR) of greater than 106 dB and a power supply rejection ratio (PSRR) of less than 3.2 μV/V.
- Unity-gain stable with a gain bandwidth product of 5 MHz and a slew rate of 2.4 V/μs.
- Excellent amplifier matching, suitable for multiple gain blocks, low noise instrumentation amplifiers, dual buffers, and low noise active filters.
- Lower power consumption compared to two OP27 devices.
Applications
- Low noise instrumentation amplifiers
- Dual buffers
- Low noise active filters
- Multiple gain blocks
- High precision measurement systems
- Audio and medical equipment where low noise is critical
Q & A
- What is the maximum voltage noise density of the OP270FZ?
The maximum voltage noise density of the OP270FZ is 5 nV/√Hz at 1 kHz.
- What is the input offset voltage of the OP270FZ?
The input offset voltage of the OP270FZ is less than 400 μV.
- What is the common-mode rejection ratio (CMR) of the OP270FZ?
The CMR of the OP270FZ is greater than 106 dB.
- What is the slew rate of the OP270FZ?
The slew rate of the OP270FZ is 2.4 V/μs typical.
- Is the OP270FZ unity-gain stable?
Yes, the OP270FZ is unity-gain stable.
- What is the gain bandwidth product of the OP270FZ?
The gain bandwidth product of the OP270FZ is 5 MHz typical.
- How does the power consumption of the OP270FZ compare to two OP27 devices?
The OP270FZ consumes one-third less power than two OP27 devices.
- What are some typical applications of the OP270FZ?
The OP270FZ is typically used in low noise instrumentation amplifiers, dual buffers, low noise active filters, and high precision measurement systems.
- What is the input bias current of the OP270FZ?
The input bias current of the OP270FZ is less than 80 nA.
- Is the OP270FZ suitable for high gain applications?
Yes, the OP270FZ is suitable for high gain applications due to its high open-loop gain of more than 1,500,000 into a 10 kΩ load.
