AD8552AR

Overview

The AD8552AR is a dual-channel, zero-drift operational amplifier featuring rail-to-rail input and output capabilities. It operates on a single supply ranging from 2.7 V to 5.5 V. Key electrical specifications include a typical offset voltage of 1 μV, an input bias current of 20 pA, and a gain-bandwidth product of 1.5 MHz at 5 V. The device provides high common-mode rejection and power supply rejection ratios of 130 dB. It consumes approximately 850 μA per amplifier at 5 V and functions within an extended temperature range of -40°C to +125°C.

Feature Summary

• Utilizes auto-zero stabilization architecture to achieve ultralow offset voltage and drift without requiring external capacitors.
• Features rail-to-rail input and output swings, enabling accurate sensing near both supply rails.
• Provides high open-loop gain and exceptional common-mode and power supply rejection ratios.
• Operates efficiently on low single-supply voltages with minimal quiescent current consumption.

Applications

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

Procurement Notes

Verify the specific package suffix against the datasheet ordering guide to ensure correct pinout and thermal characteristics. Confirm that the operating environment remains within the specified -40°C to +125°C range. Ensure supply voltages do not exceed absolute maximum ratings to prevent permanent damage. Check for required layout precautions such as guard rings to maintain high input impedance performance.

Selection Notes

Select this component for applications demanding high DC precision and stability over wide temperature variations. The dual-channel configuration is suitable for differential signal conditioning where space efficiency is required. Consider the 1.5 MHz bandwidth for moderate-speed signal processing. Evaluate the rail-to-rail capability if interfacing with low-voltage ADCs or single-supply systems.

Part Context

The AD8552AR belongs to the AD855x family of zero-drift amplifiers, which includes single (AD8551) and quad (AD8554) variants. This series combines the accuracy of chopper-stabilized designs with lower cost and simpler implementation. The dual-channel version offers two independent amplifiers in a compact surface-mount package, ideal for multi-sensor interfaces.

Replacement Considerations

Direct functional substitutes within the same family include the AD8551AR (single channel) and AD8554AR (quad channel). Verify pin compatibility when replacing with other packages like TSSOP (RU suffix) versus SOIC (R suffix).