AD8646WARMZ-R7

Overview

The AD8646WARMZ-R7 is a dual-channel, precision operational amplifier from Analog Devices, featuring rail-to-rail input and output capabilities. It operates on a single supply voltage ranging from 2.7 V to 5.5 V with a maximum operating temperature of +125°C. Key electrical specifications include a gain bandwidth product of 24 MHz, a slew rate of 11 V/μs, and an input offset voltage of 2.5 mV maximum. The device draws a typical supply current of 2 mA per amplifier and offers a short-circuit output current of ±120 mA. It is housed in an 8-lead MSOP package and is qualified for automotive applications under the AEC-Q100 standard.

Feature Summary

• Rail-to-rail input and output operation enables full signal swing capability within the supply voltage range.
• Automotive qualification ensures reliability and performance consistency for demanding vehicle environments.
• Low noise density and low input bias current support high-precision signal conditioning tasks.
• High output drive capability allows direct interfacing with low impedance loads.

Applications

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

Procurement Notes

Verify that the specific part number matches the required automotive grade (indicated by 'W') and the dual-channel configuration. Confirm the package type is 8-lead MSOP as specified. Ensure the datasheet revision aligns with design requirements. Check for RoHS compliance status if environmental regulations apply to the final assembly. Validate that the supplier provides traceability documentation consistent with automotive quality standards.

Selection Notes

Select this component when both dual-channel functionality and automotive qualification are mandatory. The wide bandwidth and low noise make it suitable for high-speed precision applications. Consider the rail-to-rail feature if maximizing dynamic range in single-supply systems is critical. Evaluate the thermal resistance characteristics against the expected PCB layout and ambient temperature conditions to ensure stable operation within the specified junction temperature limits.

Part Context

This device belongs to the AD8646/AD8647/AD8648 family of precision amplifiers. While sharing core performance metrics like bandwidth and noise, the AD8646 differs from the AD8647 by lacking a shutdown pin and from the AD8648 by being a dual rather than quad channel. The 'W' suffix denotes automotive qualification, distinguishing it from commercial variants. The 'R7' suffix indicates reel packaging for surface-mount assembly.

Replacement Considerations

Direct substitutes within the same family include the AD8646ARZ or AD8646ARMZ for non-automotive use. For automotive replacements, verify availability of other AD8646W variants with different packaging options such as SOIC_N. Cross-referencing with similar rail-to-rail amplifiers requires checking pin compatibility and ensuring equivalent electrical parameters are met.