AD8552ARU

Overview

The AD8552ARU is a dual-channel, zero-drift operational amplifier manufactured by Analog Devices Inc. It features rail-to-rail input and output swings and operates on a single supply voltage ranging from 2.7 V to 5.5 V. The device utilizes an auto-zero stabilization topology to achieve ultralow offset voltage of 1 μV and input offset drift of 0.005 μV/°C. Key electrical parameters include a gain bandwidth product of 1.5 MHz at 5 V, a slew rate of 0.4 V/μs, and high common-mode rejection ratio (CMRR) and power supply rejection ratio (PSRR) exceeding 130 dB. It is housed in an 8-lead TSSOP surface-mount package.

Feature Summary

• Zero-drift architecture utilizing auto-zero stabilization for minimal offset voltage and drift over temperature.
• Rail-to-rail input and output capability enabling full signal swing across the entire supply range.
• High precision performance with exceptional CMRR and PSRR exceeding 130 dB.
• No external capacitors required for operation.

Applications

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

Procurement Notes

Verify the specific ordering suffix 'RU' corresponds to the 8-lead TSSOP package configuration as defined in the manufacturer's documentation. Confirm that the component meets the extended industrial/automotive temperature range specifications of -40°C to +125°C. Ensure compatibility with single-supply voltages between 2.7 V and 5.5 V for the target application environment.

Selection Notes

Select this component when sub-microvolt offset stability is critical without the need for external compensation components. The dual-channel configuration allows for cost-effective implementation of multi-stage sensor interfaces. Consider the 8-lead TSSOP package constraints regarding thermal dissipation and board space requirements compared to SOIC alternatives within the same family.

Part Context

The AD8552ARU belongs to the AD855x family of zero-drift, single-supply, rail-to-rail input/output operational amplifiers. This series includes the single-channel AD8551 and quad-channel AD8554 variants. All members share the same core auto-zero stabilization technology, offering high accuracy and low noise characteristics suitable for precision measurement applications requiring stable DC performance.

Replacement Considerations

The AD8552ARZ serves as a direct pin-compatible alternative within the same family, differing primarily in the 8-lead narrow SOIC package instead of the TSSOP format. Both variants share identical electrical specifications and functionality.

FAQ

Does the AD8552ARU require external capacitors for its auto-zero function?

No, the AD8552ARU does not require external capacitors; it integrates the necessary components internally for its auto-zero stabilization process.

What is the input bias current specification for the AD8552ARU?

The input bias current is specified as typically 300 pA at temperatures up to +85°C, increasing to a maximum of 4 nA across the full operating temperature range of -40°C to +125°C.