Overview
The AD8572ARU-REEL, produced by Analog Devices Inc., is a dual operational amplifier (op amp) that features advanced zero-drift and chopper-stabilized technologies. This component is part of the AD8571/AD8572/AD8574 family, known for their high accuracy and low cost. The AD8572 is designed to operate from a single supply voltage ranging from 2.7 V to 5.5 V, making it versatile for various applications. It offers rail-to-rail input and output swings, ensuring maximum signal range and flexibility.
Key Specifications
| Parameter | Value | Conditions |
|---|---|---|
| Input Bias Current | 10 pA (typical), 150 pA (maximum) | −40°C ≤ TA ≤ +125°C |
| Supply Current per Amplifier | 750 μA (typical), 1075 μA (maximum) | −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 |
| Power Supply Rejection Ratio (PSRR) | 115 dB to 130 dB | VS = 2.7 V to 5.5 V, −40°C ≤ TA ≤ +125°C |
| Offset Voltage Drift (∆VOS/∆T) | 0.005 μV/°C to 0.04 μV/°C | −40°C ≤ TA ≤ +125°C |
| Output Voltage High (VOH) | 4.95 V to 4.98 V | RL = 10 kΩ to GND, −40°C ≤ TA ≤ +125°C |
| Output Voltage Low (VOL) | 10 mV to 30 mV | RL = 10 kΩ to V+, −40°C ≤ TA ≤ +125°C |
| Short-Circuit Limit (ISC) | ±25 mA to ±50 mA | −40°C to +125°C |
| Slew Rate (SR) | 0.4 V/μs | RL = 10 kΩ |
| Gain Bandwidth Product (GBP) | 1.5 MHz | |
| Package | 8-TSSOP (0.173, 4.40mm Width) |
Key Features
- Zero-Drift Technology: Utilizes a spread-spectrum, auto-zero technique to eliminate intermodulation effects and provide high accuracy.
- Low Input Bias Current: Typical input bias current of 10 pA, ensuring minimal input signal distortion.
- Rail-to-Rail Input and Output: Allows for maximum signal range and flexibility in various applications.
- Low Supply Current: Each op amp consumes only 750 μA of supply current, making it power-efficient.
- No External Capacitors Required: Simplifies circuit design and reduces component count.
- High CMRR and PSRR: Excellent common-mode rejection ratio and power supply rejection ratio for robust noise rejection.
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 signal quality in strain gage measurements.
- Medical Instrumentation: Employed in medical devices requiring high precision and low noise.
- Thermocouple Amplifiers: Optimized for thermocouple-based temperature measurements.
Q & A
- What is the typical input bias current of the AD8572?
The typical input bias current is 10 pA.
- What is the supply voltage range for the AD8572?
The AD8572 operates from a single supply voltage ranging from 2.7 V to 5.5 V.
- Does the AD8572 require external capacitors?
No, the AD8572 does not require external capacitors.
- What is the common-mode rejection ratio (CMRR) of the AD8572?
The CMRR is between 120 dB and 140 dB.
- What is the slew rate of the AD8572?
The slew rate is 0.4 V/μs.
- What are the typical applications of the AD8572?
Typical applications include temperature sensors, pressure sensors, precision current sensing, strain gage amplifiers, medical instrumentation, and thermocouple amplifiers.
- What is the package type of the AD8572ARU-REEL?
The package type is 8-TSSOP (0.173, 4.40mm Width).
- What is the gain bandwidth product (GBP) of the AD8572?
The gain bandwidth product is 1.5 MHz.
- How much supply current does each op amp in the AD8572 consume?
Each op amp consumes 750 μA of supply current.
- What is the short-circuit limit of the AD8572?
The short-circuit limit is ±25 mA to ±50 mA.
