AD8572AR

Overview

The AD8572AR is a dual-channel, zero-drift operational amplifier manufactured by Analog Devices Inc. It operates on a single supply voltage ranging from 2.7 V to 5 V and features rail-to-rail input and output capabilities. Key electrical specifications include a maximum offset voltage of 10 μV across the extended temperature range, an input bias current of up to 4 nA at +125°C, and a gain bandwidth product of 1.5 MHz. The device provides high open-loop gain (145 dB typical) and excellent common-mode rejection (140 dB typical). It is housed in an 8-lead SOIC package and is designed for precision applications requiring minimal drift.

Feature Summary

• Utilizes spread-spectrum auto-zero technology to eliminate intermodulation distortion while maintaining low offset voltage and drift.
• Features rail-to-rail input and output swings compatible with single-supply operation from 2.7 V to 5 V.
• Offers ultralow input bias current and high open-loop gain for enhanced precision in sensitive measurement circuits.

Applications

• Temperature sensors
• Pressure sensors
• Precision current sensing
• Strain gage amplifiers
• Medical instrumentation

Procurement Notes

Verify the specific ordering suffix against the manufacturer's official documentation to ensure correct package type and reel configuration. Confirm that the component meets RoHS compliance requirements if applicable to your manufacturing standards. Cross-reference the datasheet revision to ensure all electrical characteristics align with your design specifications before finalizing procurement.

Selection Notes

Select this component for designs requiring high DC accuracy without external trimming capacitors. Ensure the application operates within the specified 2.7 V to 5 V single-supply range. Consider the thermal resistance characteristics when designing PCB layouts for environments exceeding standard temperatures. Verify that the required output current does not exceed the short-circuit protection limits defined in the absolute maximum ratings.

Part Context

The AD8572AR belongs to the AD857x family of zero-drift operational amplifiers, which includes single (AD8571), dual (AD8572), and quad (AD8574) variants. This family shares identical core architecture and electrical performance characteristics, differing primarily in channel count and pinout configurations. The AD8572 specifically integrates two independent amplifiers into a compact 8-lead surface-mount package.

Replacement Considerations

Direct functional substitutes within the same family include the AD8571 (single channel) and AD8574 (quad channel) provided the pinout compatibility is verified. Other packages such as MSOP or TSSOP may serve as physical replacements if the electrical parameters remain unchanged.

FAQ

Does the AD8572 require external capacitors for stabilization?

No, the AD8572 utilizes a spread-spectrum auto-zero technique that eliminates the need for external capacitors.

What is the input voltage range of the AD8572?

The input voltage range extends from ground (GND) to the positive supply voltage (VS), supporting full rail-to-rail input capability.