AD8571AR-REEL

Overview

The AD8571AR-REEL is a single-channel, zero-drift operational amplifier manufactured by Analog Devices Inc. It features rail-to-rail input and output capabilities and operates on a single supply voltage ranging from 2.7 V to 5 V. Key electrical specifications include a maximum offset voltage of 10 μV across the temperature range, an input bias current of 1.5 nA, and a gain bandwidth product of 1 MHz at 2.7 V or 1.5 MHz at 5 V. The device provides high open-loop gain (145 dB typical), low noise density (51 nV/√Hz at 5 V), and fast overload recovery time (50 μs). It is housed in an 8-lead SOIC package.

Feature Summary

• Utilizes spread-spectrum auto-zero technology to eliminate intermodulation distortion while maintaining ultralow offset voltage and drift.
• Features rail-to-rail input and output swing capability for maximum dynamic range within the supply voltage limits.
• Provides exceptional precision with ultralow input bias current and high common-mode rejection ratio suitable for sensitive measurements.

Applications

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

Procurement Notes

Verify that the ordering suffix AR corresponds to the 8-lead narrow SOIC package as specified in the manufacturer's documentation. Confirm that the REEL designation indicates tape-and-reel packaging rather than tube packaging. Ensure the component meets the required industrial or automotive temperature range specifications if applicable to the design environment.

Selection Notes

Select this component when application requirements demand minimal DC error sources such as offset voltage and drift without external trimming. The rail-to-rail I/O functionality makes it suitable for low-voltage single-supply systems where signal integrity near the rails is critical. Consider the specific gain bandwidth product and slew rate limitations for AC signal applications.

Part Context

The AD8571 is part of the AD857x family of zero-drift amplifiers, which also includes the dual AD8572 and quad AD8574 variants. This family shares the same core architecture and performance characteristics, differing primarily in channel count and pin configurations. The AD8571 specifically serves as the single-channel solution within this precision amplifier lineup.

Replacement Considerations

Direct functional substitutes within the same package and specification profile are not explicitly confirmed in the provided source material. Designers should consult the manufacturer's official replacement guide or cross-reference tools for validated alternatives that match the zero-drift topology and SOIC-8 footprint.

FAQ

Does the AD8571 require external capacitors for operation?

No, the AD8571 does not require external capacitors for its auto-zero stabilization function.

What is the maximum differential input voltage allowed?

The absolute maximum differential input voltage is limited to ±5.0 V or the supply voltage, whichever is less.