AD8644ARUZ

Overview

The AD8644ARUZ is a quad, single-supply operational amplifier from Analog Devices, housed in a 14-lead TSSOP package. 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. Key electrical characteristics include a maximum input offset voltage of 1.0 mV, an output short-circuit current of 70 mA, and rail-to-rail input and output capabilities.

Feature Summary

• Rail-to-rail inputs and outputs provide extended dynamic range for single-supply applications.
• Capable of driving large capacitive loads while maintaining stability.
• Optimized for LCD monitor applications using high-voltage extra fast complementary bipolar process.

Applications

• LCD gamma and VCOM drivers
• Modems
• Portable instrumentation
• Direct access arrangement

Procurement Notes

Verify the specific ordering suffix against the manufacturer's official documentation to confirm package type and RoHS compliance status. Ensure the component matches the required temperature range and pin configuration for your circuit design before finalizing procurement.

Selection Notes

Select this component when a quad amplifier with rail-to-rail performance and moderate bandwidth is required. Consider its 70 mA output drive capability for applications needing significant load current. Verify that the 14-lead TSSOP package fits within the physical constraints of the target PCB layout.

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 into one package, offering a compact solution for multi-channel signal processing tasks compared to using individual single-channel devices.

Replacement Considerations

Check the Ordering Guide for compatible variants such as AD8644ARU or AD8644ARZ. These share identical electrical specifications but may differ in packaging options or lead-free compliance status.

FAQ

Does the AD8644 have built-in short-circuit protection?

No, the AD8644 does not have built-in short-circuit protection. Shorting the output directly can destroy the device, although it can typically handle up to 70 mA.

What is the input voltage range of the AD8644?

The input voltage range extends from the negative supply rail (GND) to the positive supply rail (VS), supporting full rail-to-rail operation.