AD8629WARZ-RL

Overview

The AD8629WARZ-RL is a dual-channel, zero-drift operational amplifier manufactured by Analog Devices Inc. It features rail-to-rail input and output capabilities with a gain-bandwidth product of 2.5 MHz. The device operates on a single supply voltage ranging from 2.7 V to 5 V or dual supplies from ±1.35 V to ±2.5 V. Key electrical specifications include an input offset voltage of 1 µV, an input bias current of 100 pA maximum, and a supply current of 2.2 mA per channel. It provides a common-mode rejection ratio of 140 dB and a power supply rejection ratio of 130 dB. The component is housed in an 8-lead SOIC package and supports an operating temperature range from -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 without requiring external components for basic operation.
• Features extremely fast overload recovery time due to internal settling within two clock cycles after saturation.
• Qualified for automotive applications with controlled manufacturing standards.

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. Ensure the automotive grade designation matches project requirements. Confirm RoHS compliance status through the datasheet. Validate that the 8-lead SOIC package dimensions align with PCB layout constraints before finalizing procurement.

Selection Notes

Select this component when high DC precision and low noise are critical in single-supply systems. The zero-drift architecture makes it suitable for applications where traditional chopper amplifiers introduce excessive switching noise. Consider the 2.5 MHz bandwidth for signal processing needs exceeding standard precision amplifiers. Verify that the 100 pA input bias current meets the source impedance requirements of the sensor interface.

Part Context

This part belongs to the AD8628/AD8629/AD8630 family of zero-drift, single-supply, rail-to-rail input/output operational amplifiers. The AD8629 specifically denotes the dual-channel variant within this series. The 'W' suffix indicates qualification for automotive applications, while 'ARZ' specifies the 8-lead SOIC package and RoHS compliance. The '-RL' suffix denotes tape and reel packaging.

Replacement Considerations

The AD8628WARZ-RL serves as the single-channel equivalent within the same family. The AD8630WARZ-RL is the quad-channel counterpart. Designers should verify pin compatibility and ensure that the specific automotive grade requirements are met by these substitutes.