AD8551ARZ

Overview

The AD8551ARZ 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. The device utilizes an auto-zero stabilization topology to achieve an ultralow offset voltage of 1 μV and an input offset drift of 0.005 μV/°C. Key electrical specifications include a gain bandwidth product of 1.5 MHz, a slew rate of 0.4 V/μs, and a typical supply current of 975 μA. It is housed in an 8-lead SOIC package and supports an extended industrial temperature range from -40°C to +125°C.

Feature Summary

• Auto-zero stabilization architecture for ultralow offset voltage and drift
• Rail-to-rail input and output swing capability
• High open-loop gain with exceptional CMRR and PSRR exceeding 130 dB
• Ultralow input bias current and low power consumption

Applications

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

Procurement Notes

Verify the specific ordering suffix against official documentation to confirm package type and reel specifications. Ensure compatibility with the required operating temperature range and supply voltage constraints. Confirm that the component meets all necessary environmental compliance standards before integration into the final design.

Selection Notes

Select this component when high precision and stability are required over wide temperature variations. The rail-to-rail performance makes it suitable for low-voltage single-supply applications. Consider the trade-off between the low noise density and the moderate slew rate when evaluating signal bandwidth requirements.

Part Context

This part belongs to the AD8551/AD8552/AD8554 family of zero-drift, single-supply, rail-to-rail input/output operational amplifiers. The AD8551 represents the single-channel configuration within this series, sharing architectural similarities with the dual (AD8552) and quad (AD8554) variants while differing in channel count and package options.

Replacement Considerations

Direct substitutes within the same family include the AD8552 and AD8554, provided the application requires multiple channels. Verify pinout compatibility and thermal characteristics when considering alternative packages such as MSOP or TSSOP.