AD8644ARZ

Overview

The AD8644ARZ is a quad, single-supply operational amplifier manufactured by Analog Devices Inc. It features a unity-gain bandwidth of 5.5 MHz and a slew rate of 7.5 V/μs. The device operates on supply voltages ranging from 5 V to 18 V with a typical supply current of 800 μA per amplifier. It provides rail-to-rail input and output capabilities, an offset voltage of 1.0 mV maximum, and an output short-circuit current of 70 mA. The component is housed in a 14-lead Narrow Body SOIC package and functions within a temperature range of –20°C to +85°C.

Feature Summary

• Rail-to-rail inputs and outputs for extended dynamic range
• High capacitive load drive stability without phase reversal
• Low supply current optimized for portable designs
• Immunity to output phase reversal under normal operation

Applications

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

Procurement Notes

Verify the specific ordering suffix to confirm RoHS compliance status, as indicated by the 'Z' designation in official documentation. Ensure the selected package variant matches the required PCB footprint dimensions. Confirm that the operating environment remains within the specified –20°C to +85°C range to maintain guaranteed electrical performance parameters.

Selection Notes

Select this component when high output current capability is required for driving heavy loads or large capacitors directly. The quad configuration allows for compact multi-channel signal processing solutions. Consider the HV XFCB process benefits for applications demanding improved gain bandwidth and phase margin compared to standard CMOS alternatives.

Part Context

This part belongs to the AD8614/AD8644 family of precision amplifiers designed for LCD monitor applications. The quad version integrates four independent amplifiers into a single package, sharing common power rails. It utilizes Analog Devices' proprietary high voltage, extra fast complementary bipolar process to achieve low parasitic capacitance and enhanced performance metrics.

Replacement Considerations

The AD8614 serves as the single-channel equivalent within the same family. Other quad variants such as the AD8644ARU offer identical electrical characteristics but utilize a TSSOP package instead of the SOIC form factor.