AD8644ARZ-REEL7

Overview

The AD8644ARZ-REEL7 is a quad operational amplifier from Analog Devices, utilizing the HV XFCB process for high voltage and fast complementary bipolar performance. It features rail-to-rail inputs and outputs, a unity-gain bandwidth of 5.5 MHz, and a slew rate of 7.5 V/μs. The device operates on single supplies ranging from 5 V to 18 V with a typical supply current of 800 μA per amplifier. It provides a high output current of 70 mA and maintains stability with large capacitive loads.

Feature Summary

• Rail-to-rail input and output capability ensures maximum dynamic range in single-supply applications.
• High output drive capability of 70 mA supports demanding load requirements without external buffering.
• Stable operation with large capacitive loads simplifies circuit design for video and LCD driver applications.
• Low power consumption of 800 μA per amplifier makes it suitable for portable and battery-powered instrumentation.

Applications

• LCD gamma and VCOM drivers
• Modems and direct access arrangements
• Portable instrumentation
• Audio headphone and line-out amplifiers

Procurement Notes

Verify that the ordering suffix REEL7 corresponds to the specific tape and reel packaging configuration required for automated assembly processes. Confirm RoHS compliance status indicated by the Z suffix matches environmental regulations applicable to the target deployment region. Ensure the 14-lead SOIC package option aligns with the printed circuit board footprint and thermal management strategy defined in the system schematic.

Selection Notes

Select this component when a quad amplifier configuration is necessary to minimize board space and component count. The 5.5 MHz bandwidth and 7.5 V/μs slew rate are appropriate for general-purpose signal conditioning and moderate-speed data acquisition systems. Consider the 70 mA output current capability if driving low-impedance loads directly. Verify that the operating temperature range of -20°C to +85°C meets the environmental constraints of the final application.

Part Context

This part belongs to the AD8614/AD8644 family of single-supply, 18 V operational amplifiers. The AD8644 variant specifically integrates four independent amplifiers within a single package, offering a compact solution for multi-channel signal processing tasks. It shares core electrical characteristics with the single-channel AD8614 but provides higher integration density for complex analog front-end designs.

Replacement Considerations

The AD8644AR and AD8644ARU are functionally equivalent variants within the same product family, differing primarily in package type (SOIC vs. TSSOP) and reel packaging specifications.