Overview
The AD8571ARZ, produced by Analog Devices Inc., is a zero-drift, single-supply, rail-to-rail input/output operational amplifier. This device is part of the AD8571/AD8572/AD8574 family, which includes single, dual, and quad amplifiers, respectively. The AD8571ARZ is known for its ultralow offset, drift, and bias current, making it ideal for applications requiring high precision and low distortion.
It operates from a single supply voltage as low as 2.7 V and up to 5 V, and it does not require external capacitors. The amplifier uses a spread-spectrum, auto-zero technique to eliminate intermodulation effects and ensure high accuracy.
Key Specifications
| Parameter | Value | Conditions |
|---|---|---|
| Input Bias Current | 10 pA (typical) | -40°C ≤ TA ≤ +125°C |
| Supply Current | 750 μA per op amp | - |
| Input Offset Voltage | 1 μV (typical) | - |
| Offset Voltage Drift | 0.005 μV/°C (typical) | -40°C ≤ TA ≤ +125°C |
| Common-Mode Rejection Ratio (CMRR) | 120 dB to 140 dB | VCM = 0 V to 5 V, -40°C ≤ TA ≤ +125°C |
| Large Signal Voltage Gain | 125 dB to 145 dB | RL = 10 kΩ, VO = 0.3 V to 4.7 V, -40°C ≤ TA ≤ +125°C |
| Output Voltage High | 4.99 V to 4.998 V | RL = 100 kΩ to GND, -40°C to +125°C |
| Slew Rate | 0.4 V/μs | - |
| Operating Supply Voltage | 2.7 V to 5 V | - |
| Package | 8-SOIC (0.154, 3.90mm Width) | - |
Key Features
- Zero-Drift Amplifier: Uses a spread-spectrum, auto-zero technique to eliminate intermodulation effects and ensure high accuracy.
- Ultralow Offset and Drift: Input offset voltage of 1 μV and offset voltage drift of 0.005 μV/°C.
- Low Input Bias Current: Typical input bias current of 10 pA.
- Rail-to-Rail Input and Output: Allows the input common-mode voltage range to reach both supply rails.
- Low Supply Current: 750 μA per op amp.
- No External Capacitors Required: Simplifies circuit design.
- High CMRR and Large Signal Voltage Gain: Ensures high precision and low distortion in output signals.
Applications
- Temperature Sensors: Ideal for precise temperature measurements.
- Pressure Sensors: Suitable for high-accuracy pressure sensing applications.
- Precision Current Sensing: Used in applications requiring accurate current measurements.
- Strain Gage Amplifiers: Enhances the accuracy of strain gage measurements.
- Medical Instrumentation: Applies to various medical devices requiring high precision and low noise.
- Thermocouple Amplifiers: Optimized for thermocouple-based temperature measurements.
- Automotive Applications: Suitable for sensitive measurement and control systems in automotive environments.
Q & A
- What is the typical input bias current of the AD8571ARZ?
The typical input bias current is 10 pA.
- What is the operating supply voltage range for the AD8571ARZ?
The operating supply voltage range is from 2.7 V to 5 V.
- Does the AD8571ARZ require external capacitors?
No, the AD8571ARZ does not require external capacitors.
- What is the input offset voltage of the AD8571ARZ?
The input offset voltage is 1 μV (typical).
- What is the common-mode rejection ratio (CMRR) of the AD8571ARZ?
The CMRR is 120 dB to 140 dB.
- What is the slew rate of the AD8571ARZ?
The slew rate is 0.4 V/μs.
- What are some common applications of the AD8571ARZ?
Common applications include temperature sensors, pressure sensors, precision current sensing, strain gage amplifiers, medical instrumentation, thermocouple amplifiers, and automotive applications.
- What is the package type of the AD8571ARZ?
The package type is 8-SOIC (0.154, 3.90mm Width).
- What is the typical supply current per op amp for the AD8571ARZ?
The typical supply current per op amp is 750 μA.
- How does the AD8571ARZ handle offset voltage drift?
The AD8571ARZ has an extremely small temperature drift of 0.005 μV/°C.
