Overview
The AD8675 precision operational amplifier, produced by Analog Devices Inc., is designed for high-precision applications requiring ultralow offset, drift, and voltage noise. This amplifier features a rail-to-rail output, wide bandwidth, and very low input bias currents, making it ideal for applications where large error sources cannot be tolerated. The AD8675 combines the precision and low power consumption of industry-standard amplifiers like the OP07, with the added benefit of low noise and high accuracy.
Key Specifications
| Parameter | Symbol | Test Conditions/Comments | Min | Typ | Max | Unit |
|---|---|---|---|---|---|---|
| Offset Voltage | VOS | −40°C ≤ TA ≤ +125°C | 10 | 75 | 240 | µV |
| Offset Voltage Drift | ΔVOS/ΔT | −40°C ≤ TA ≤ +125°C | 0.2 | 0.6 | µV/°C | |
| Input Bias Current | IB | −40°C ≤ TA ≤ +125°C | −2 | 0.5 | 2 | nA |
| Input Offset Current | IOS | −40°C ≤ TA ≤ +125°C | −1 | 0.1 | 1 | nA |
| Input Voltage Range | IVR | −3.0 | 3.0 | V | ||
| Common-Mode Rejection Ratio | CMRR | VCM = −3.0 V to +3.0 V | 105 | 130 | dB | |
| Supply Current/Amplifier | ISY | VO = 0 V | 2.3 | 2.7 | 3.4 | mA |
| Slew Rate | SR | RL = 2 kΩ | 2.5 | V/µs | ||
| Gain Bandwidth Product | GBP | 10 | MHz | |||
| Voltage Noise (0.1 Hz to 10 Hz) | en p-p | 0.1 | µV p-p | |||
| Voltage Noise Density at 1 kHz | en f = 1 kHz | 2.8 | nV/√Hz |
Key Features
- Ultralow Offset and Drift: Typical offset voltage of 10 µV and offset drift of 0.2 µV/°C, ensuring high precision over a wide temperature range.
- Low Noise: Voltage noise of 0.1 µV p-p (0.1 Hz to 10 Hz) and voltage noise density of 2.8 nV/√Hz at 1 kHz.
- Low Input Bias Current: Very low input bias current and input current noise, making it suitable for high-impedance sources.
- Rail-to-Rail Output: Full rail-to-rail output swing, enhancing the signal-to-noise ratio and dynamic range.
- High Bandwidth and Slew Rate: Gain bandwidth product of 10 MHz and slew rate of 2.5 V/µs.
- Compact Packaging: Available in 8-lead MSOP and SOIC packages, RoHS compliant, suitable for space-critical applications.
- Extended Temperature Range: Specified for the extended industrial temperature range of −40°C to +125°C.
- External Offset Nulling Capability: Allows for external compensation of device and system offset errors up to 3.5 mV without affecting offset drift, CMRR, and PSRR.
Applications
- Precision Instrumentation: Ideal for precision filter circuits, PLLs, and other high-accuracy signal processing applications.
- Medical Instrumentation: Suitable for medical devices requiring low noise and high precision.
- Sensors and Transducers: Used in position and pressure sensors, strain gage amplifiers, and other sensor applications.
- Industrial Automation: Applicable in various industrial automation and control systems where high precision and low noise are critical.
Q & A
- What is the typical offset voltage of the AD8675?
The typical offset voltage of the AD8675 is 10 µV.
- What is the offset voltage drift of the AD8675?
The offset voltage drift of the AD8675 is 0.2 µV/°C.
- What is the input bias current of the AD8675?
The input bias current of the AD8675 is typically 0.5 nA, with a range of −2 nA to +2 nA.
- What is the common-mode rejection ratio (CMRR) of the AD8675?
The CMRR of the AD8675 is 105 dB to 130 dB.
- What is the gain bandwidth product (GBP) of the AD8675?
The GBP of the AD8675 is 10 MHz.
- What are the package options for the AD8675?
The AD8675 is available in 8-lead MSOP and SOIC packages.
- What is the operating temperature range of the AD8675?
The AD8675 operates over an extended industrial temperature range of −40°C to +125°C.
- Does the AD8675 support external offset nulling?
Yes, the AD8675 allows for external compensation of device and system offset errors up to 3.5 mV.
- What are some typical applications of the AD8675?
The AD8675 is used in precision instrumentation, medical instrumentation, sensors and transducers, and industrial automation.
- Is the AD8675 RoHS compliant?
Yes, the AD8675 is RoHS compliant.
