Overview
The AD8572AR-REEL, produced by Analog Devices Inc., is a zero-drift, single-supply, rail-to-rail input/output operational amplifier. This dual-channel op-amp is part of the AD8571/AD8572/AD8574 family, known for its high accuracy and low cost. It features a spread-spectrum, auto-zero technique that eliminates intermodulation effects and provides ultralow offset, drift, and bias current. The AD8572AR-REEL operates from a single supply of 2.7 V to 5.5 V, making it versatile for various applications.
Key Specifications
| Parameter | Typical Value | Min/Max Value |
|---|---|---|
| Input Bias Current | 10 pA | 30 pA to 150 pA (-40°C to +125°C) |
| Supply Current per Amplifier | 750 μA | 850 μA to 1,000 μA (-40°C to +125°C) |
| Input Offset Voltage Drift | 0.005 μV/°C | 0.005 μV/°C to 0.04 μV/°C (-40°C to +125°C) |
| Common-Mode Rejection Ratio (CMRR) | 120 dB to 140 dB | 115 dB to 140 dB (-40°C to +125°C) |
| Power Supply Rejection Ratio (PSRR) | 120 dB to 130 dB | 115 dB to 130 dB (-40°C to +125°C) |
| Slew Rate | 0.4 V/μs | - |
| Gain Bandwidth Product (GBP) | 1.5 MHz | - |
| Output Voltage High (VOH) | 4.95 V to 4.98 V (RL = 10 kΩ to GND) | 4.95 V to 4.98 V (-40°C to +125°C) |
| Output Voltage Low (VOL) | 10 mV to 30 mV (RL = 10 kΩ to V+) | 10 mV to 30 mV (-40°C to +125°C) |
| Short-Circuit Limit (ISC) | ±25 mA to ±50 mA | ±25 mA to ±50 mA (-40°C to +125°C) |
Key Features
- Zero-Drift Technology: Utilizes a spread-spectrum, auto-zero technique to eliminate intermodulation effects and provide high accuracy.
- Rail-to-Rail Input/Output: Allows for full-range input and output swings, enhancing the amplifier's versatility.
- Low Input Bias Current: Typical value of 10 pA, ensuring minimal input current.
- Low Supply Current: Operates with a supply current of 750 μA per amplifier, making it power-efficient.
- No External Capacitors Required: Simplifies circuit design by eliminating the need for external capacitors.
- High CMRR and PSRR: Provides excellent common-mode rejection ratio and power supply rejection ratio, ensuring robust performance in noisy environments.
Applications
- Temperature Sensors: Suitable for precise temperature measurement applications.
- Pressure Sensors: Used in pressure sensing applications requiring high accuracy.
- Precision Current Sensing: Ideal for applications that demand precise current measurement.
- Strain Gage Amplifiers: Employed in strain gage applications to amplify small signals accurately.
- Medical Instrumentation: Used in medical devices where high precision and reliability are crucial.
- Thermocouple Amplifiers: Suitable for thermocouple applications requiring low drift and high accuracy).
Q & A
- What is the typical input bias current of the AD8572AR-REEL?
The typical input bias current is 10 pA.
- What is the operating voltage range for the AD8572AR-REEL?
The AD8572AR-REEL operates from a single supply of 2.7 V to 5.5 V.
- Does the AD8572AR-REEL require external capacitors?
No, the AD8572AR-REEL does not require external capacitors.
- What is the common-mode rejection ratio (CMRR) of the AD8572AR-REEL?
The CMRR is typically 120 dB to 140 dB (-40°C to +125°C).
- What is the slew rate of the AD8572AR-REEL?
The slew rate is 0.4 V/μs.
- What is the gain bandwidth product (GBP) of the AD8572AR-REEL?
The GBP is 1.5 MHz.
- What are the typical output voltage high and low values for the AD8572AR-REEL?
The output voltage high (VOH) is typically 4.95 V to 4.98 V, and the output voltage low (VOL) is typically 10 mV to 30 mV (-40°C to +125°C).
- What is the short-circuit limit (ISC) of the AD8572AR-REEL?
The short-circuit limit is ±25 mA to ±50 mA (-40°C to +125°C).
- What are some common applications of the AD8572AR-REEL?
Common applications include temperature sensors, pressure sensors, precision current sensing, strain gage amplifiers, medical instrumentation, and thermocouple amplifiers.
- What is the package type of the AD8572AR-REEL?
The AD8572AR-REEL is available in an 8-SOIC (0.154, 3.90mm Width) or 8-TSSOP package.
