AD8629WARZ-R7

Overview

The AD8629WARZ-R7 is a dual-channel, zero-drift operational amplifier manufactured by Analog Devices Inc. It features rail-to-rail input and output swing, operating on a single supply from 2.7 V to 5 V or dual supplies of ±1.35 V to ±2.5 V. Key electrical parameters include a maximum offset voltage of 1 µV, an input bias current of 100 pA, and a gain-bandwidth product of 2.5 MHz at 5 V. The device offers a slew rate of 1 V/µs, a supply current of 1 mA per channel, and operates within an extended industrial temperature range of -40°C to +125°C.

Feature Summary

• Utilizes patented auto-zeroing and chopping topology to eliminate 1/f noise and maintain ultralow offset drift over temperature.
• Provides rail-to-rail input and output swing capabilities without requiring external components for stabilization.
• Features very low input bias current and high common-mode rejection ratio suitable for precision measurement applications.

Applications

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

Procurement Notes

Verify the specific package marking code A0L and the automotive qualification suffix W against the official Analog Devices ordering guide. Confirm that the reel quantity matches the required production volume. Ensure the RoHS compliant status aligns with environmental regulations for the target market. Cross-reference the datasheet revision M specifications with the component batch date code.

Selection Notes

Select this component when designing circuits requiring high DC precision without the need for external trimming capacitors. It is suitable for systems where low noise and minimal offset drift are critical across wide temperature variations. Consider the rail-to-rail capability if maximizing signal dynamic range in low-voltage single-supply designs is necessary.

Part Context

This part belongs to the AD8628/AD8629/AD8630 family of zero-drift amplifiers. The AD8629 specifically denotes the dual-channel configuration. The 'W' suffix indicates automotive qualification, while 'R7' specifies the tape and reel packaging format. It shares the same core internal architecture as the commercial variants but adheres to stricter manufacturing controls.

Replacement Considerations

The MS8629 is documented as a pin-to-pin compatible alternative offering similar rail-to-rail and auto-zero characteristics.