AD8646ARZ-REEL

Overview

The AD8646ARZ-REEL is a dual-channel, precision CMOS operational amplifier manufactured by Analog Devices Inc. It features rail-to-rail input and output capabilities with a gain bandwidth product of 24 MHz and a slew rate of 11 V/μs. The device operates on a single supply voltage ranging from 2.7 V to 5.5 V, drawing a maximum supply current of 2 mA per amplifier. Key electrical characteristics include a maximum offset voltage of 2.5 mV, an input bias current of 1 pA, and a short-circuit output current of ±120 mA. It is housed in an 8-lead SOIC package and supports an operating temperature range from -40°C to +125°C.

Feature Summary

• Rail-to-rail input and output operation enables full signal swing across the entire supply voltage range.
• High-speed performance characterized by a 24 MHz gain bandwidth product and 11 V/μs slew rate.
• Precision specifications include low offset voltage (2.5 mV max) and very low input bias current (1 pA).
• Robust output drive capability provides a short-circuit current of ±120 mA for low impedance loads.

Applications

• Battery-powered instruments
• Multipole filters
• ADC front ends
• Sensors
• Barcode scanners

Procurement Notes

Verify that the received component matches the AD8646ARZ-REEL designation and 8-Lead SOIC_N package configuration. Confirm RoHS compliance status as indicated by the 'Z' suffix in the ordering guide. Ensure the device falls within the specified -40°C to +125°C operating temperature range during integration. Cross-reference the manufacturer part number against official Analog Devices documentation to validate authenticity and revision level before deployment.

Selection Notes

Select this component when high-speed, precision amplification is required in single-supply systems. The rail-to-rail I/O functionality makes it suitable for buffering ADCs and DACs where maximizing dynamic range is critical. Its low power consumption and wide bandwidth support applications in portable instrumentation and audio line driving. Consider the AD8647 if a shutdown feature is needed, or the AD8648 for quad-channel configurations.

Part Context

The AD8646ARZ-REEL belongs to the AD8646/AD8647/AD8648 family of 24 MHz Rail-to-Rail Amplifiers. This series combines low offset voltage, low noise, and wide signal bandwidth. The AD8646 specifically denotes the dual-channel variant without a shutdown function, distinguishing it from the AD8647 which includes power-down control. The REEL suffix indicates tape-and-reel packaging for automated assembly.

Replacement Considerations

The AD8646ARMZ-REEL serves as a direct pin-compatible replacement using the MSOP-8 package instead of SOIC-8. Both variants share identical electrical specifications and functionality. Verify thermal resistance differences between the SOIC and MSOP packages when designing heat dissipation strategies.