Overview
The AD8572ARZ from Analog Devices Inc. is a precision operational amplifier that features a zero-drift, single-supply, rail-to-rail input and output (RRIO) architecture. This dual op-amp is designed to offer high accuracy and low cost, making it suitable for a variety of precision measurement and automotive applications. The AD8572ARZ uses a spread-spectrum, auto-zero technique to eliminate intermodulation effects and ensure high dc precision and low distortion for ac signals. It operates from a single supply voltage as low as 2.7 V and up to 5 V, and is guaranteed to function over a temperature range of -40°C to +125°C.
Key Specifications
| Parameter | Value | Conditions |
|---|---|---|
| Supply Voltage | 2.7 V to 5 V | - |
| Input Offset Voltage | 1 µV (typical) | - |
| Input Bias Current | 10 pA (typical) | -40°C ≤ TA ≤ +125°C |
| Supply Current | 750 µA per op amp (typical) | - |
| Common-Mode Rejection Ratio (CMRR) | 120 dB (typical) @ VCM = 0 V to 5 V | -40°C ≤ TA ≤ +125°C |
| Large Signal Voltage Gain | 125 dB (typical) @ RL = 10 kΩ, VO = 0.3 V to 4.7 V | -40°C ≤ TA ≤ +125°C |
| Offset Voltage Drift | 0.005 µV/°C (typical) | -40°C ≤ TA ≤ +125°C |
| Output Voltage High | 4.99 V (typical) @ RL = 100 kΩ to GND | -40°C to +125°C |
| Bandwidth | 1.5 MHz (typical) | - |
| Slew Rate | 0.4 V/µs (typical) | - |
| Package | 8-Pin SOIC N | - |
Key Features
- Zero-Drift Architecture: Uses a spread-spectrum, auto-zero technique to eliminate intermodulation effects and ensure high dc precision and low distortion for ac signals.
- Rail-to-Rail Input and Output: Allows the input common-mode voltage range to reach both supply rails and provides full output swing to the supply rails.
- Low Input Bias Current: Typical input bias current of 10 pA, ensuring minimal loading on the input signal.
- Low Supply Current: Typical supply current of 750 µA per op amp, making it power-efficient.
- High Common-Mode Rejection Ratio (CMRR): CMRR of 120 dB, providing excellent rejection of common-mode signals.
- High Bandwidth and Slew Rate: Bandwidth of 1.5 MHz and slew rate of 0.4 V/µs, suitable for high-speed applications.
- No External Capacitors Required: Self-calibrating architecture eliminates the need for additional trimming or external capacitors.
Applications
- Temperature Sensors: Ideal for precision temperature measurement due to its low offset voltage and drift.
- Pressure Sensors: Suitable for precision pressure sensing applications requiring high accuracy.
- Precision Current Sensing: Used in applications where precise current measurement is critical.
- Strain Gage Amplifiers: Effective in strain gage applications due to its high CMRR and low noise.
- Medical Instrumentation: Used in medical devices requiring high precision and low noise.
- Thermocouple Amplifiers: Suitable for thermocouple applications due to its ability to handle small signals with high accuracy.
- Automotive Applications: Designed to operate in the harsh automotive environment with a temperature range of -40°C to +125°C.
Q & A
- What is the supply voltage range for the AD8572ARZ?
The AD8572ARZ operates from a single supply voltage as low as 2.7 V and up to 5 V.
- What is the typical input offset voltage of the AD8572ARZ?
The typical input offset voltage is 1 µV.
- What is the input bias current of the AD8572ARZ?
The typical input bias current is 10 pA.
- What is the common-mode rejection ratio (CMRR) of the AD8572ARZ?
The CMRR is 120 dB (typical) @ VCM = 0 V to 5 V.
- Does the AD8572ARZ require external capacitors?
No, the AD8572ARZ does not require external capacitors due to its self-calibrating architecture.
- What is the bandwidth and slew rate of the AD8572ARZ?
The bandwidth is 1.5 MHz and the slew rate is 0.4 V/µs.
- What is the operating temperature range of the AD8572ARZ?
The operating temperature range is -40°C to +125°C.
- What package type is the AD8572ARZ available in?
The AD8572ARZ is available in an 8-Pin SOIC N package.
- What are some typical applications of the AD8572ARZ?
Typical applications include temperature sensors, pressure sensors, precision current sensing, strain gage amplifiers, medical instrumentation, and thermocouple amplifiers.
- Is the AD8572ARZ suitable for automotive applications?
Yes, the AD8572ARZ is designed to operate in the harsh automotive environment and is suitable for automotive applications.
