Overview
The AD8572ARZ-REEL7, produced by Analog Devices Inc., is part of the AD8571/AD8572/AD8574 family of operational amplifiers. These amplifiers are known for their ultralow offset, drift, and bias current, making them ideal for high-accuracy applications. The AD8572 is a dual operational amplifier, offering rail-to-rail input and output swings and guaranteed operation from a single supply of 2.7 V to 5 V. This family of amplifiers leverages a spread-spectrum, auto-zero technique to eliminate intermodulation effects and provide high accuracy at a low cost, without the need for external capacitors.
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 1075 μA (-40°C to +125°C) |
| 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 | 115 dB to 130 dB (-40°C to +125°C) |
| Large Signal Voltage Gain | 125 dB | 120 dB to 145 dB (-40°C to +125°C) |
| Output Voltage High (VOH) | 4.95 V (RL = 10 kΩ to GND) | 4.95 V to 4.98 V (-40°C to +125°C) |
| Output Voltage Low (VOL) | 10 mV (RL = 10 kΩ to V+) | 10 mV to 30 mV (-40°C to +125°C) |
| Slew Rate | 0.4 V/μs | - |
| Overload Recovery Time | 50 μs | - |
Key Features
- Ultralow Input Bias Current: 10 pA typical, ensuring minimal current draw from the input signal.
- Low Supply Current: 750 μA per op amp, making it suitable for low-power applications.
- Rail-to-Rail Input and Output Swings: Allows for full utilization of the supply voltage range.
- No External Capacitors Required: Simplifies circuit design and reduces component count.
- High Accuracy: Utilizes a spread-spectrum, auto-zero technique to eliminate intermodulation effects and provide high accuracy.
- Wide Operating Temperature Range: Guaranteed operation from -40°C to +125°C.
Applications
- Temperature Sensors: Ideal for precision temperature measurement applications.
- Pressure Sensors: Suitable for high-accuracy pressure sensing.
- Precision Current Sensing: Used in applications requiring precise current measurement.
- 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.
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 of 2.7 V to 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 typically 120 dB, ranging from 115 dB to 130 dB over the operating temperature range.
- What are the key applications of the AD8572?
The AD8572 is used in temperature sensors, pressure sensors, precision current sensing, strain gage amplifiers, medical instrumentation, and thermocouple amplifiers.
- What is the slew rate of the AD8572?
The slew rate is 0.4 V/μs.
- What is the overload recovery time of the AD8572?
The overload recovery time is 50 μs.
- How many operational amplifiers are in the AD8572 package?
The AD8572 is a dual operational amplifier.
- What is the operating temperature range of the AD8572?
The AD8572 operates from -40°C to +125°C.
- What is the output voltage high (VOH) of the AD8572?
The output voltage high (VOH) is typically 4.95 V with a 10 kΩ load to ground.
