AD8628AUJ-REEL

Overview

The AD8628AUJ-REEL is a single-channel zero-drift operational amplifier in a 5-lead TSOT package. It operates on a single supply from 2.7 V to 5 V (±1.35 V to ±2.5 V dual). Key electrical parameters include a typical offset voltage of 1 µV, input bias current of 30 pA, and supply current of 850 µA. The device features rail-to-rail input and output swing, a gain bandwidth product of 2.5 MHz, and a slew rate of 1 V/µs. It maintains performance across an operating temperature range of -40°C to +125°C.

Feature Summary

• Utilizes patented auto-zeroing and chopping topology to eliminate 1/f noise and minimize offset drift.
• Provides rail-to-rail input and output swing capability for maximum dynamic range.
• Features extremely low input bias current and ultralow offset voltage for high precision.
• Delivers fast overload recovery time due to optimized internal nulling loops.

Applications

• Automotive sensors
• Pressure and position sensors
• Strain gage amplifiers
• Medical instrumentation
• Thermocouple amplifiers

Procurement Notes

Verify the specific ordering suffix against the manufacturer's official documentation to confirm package type and reel quantity. Confirm RoHS compliance status and automotive qualification requirements if applicable to the target application environment before finalizing procurement specifications.

Selection Notes

Select this component when system design requires minimal offset voltage error and negligible drift over wide temperature variations. The rail-to-rail I/O characteristic simplifies biasing networks compared to standard op amps. Ensure the supply voltage remains within the specified 2.7 V to 5 V range for optimal performance.

Part Context

This part belongs to the AD8628/AD8629/AD8630 family of zero-drift amplifiers. The AUJZ suffix indicates the 5-lead TSOT plastic package variant. Other family members offer different channel counts or package styles, such as the SOIC or MSOP options, while maintaining similar core electrical characteristics.

Replacement Considerations

Direct substitutes within the same package and specification profile are not explicitly listed in the provided documentation. Verify pin compatibility and electrical limits with alternative zero-drift amplifiers if cross-referencing is required.

FAQ

Does the AD8628 require external capacitors for stability?

No external components are required for basic operation, as the internal architecture manages stability without additional filtering capacitors.

What is the mechanism behind the low noise performance?

The device uses a patented ping-pong arrangement combining auto-zeroing and chopping to reduce both low-frequency 1/f noise and high-frequency switching noise energy.