ADA4891-3ARZ-RL

Overview

The ADA4891-3ARZ-RL is a triple-channel, low-cost CMOS high-speed operational amplifier with rail-to-rail output. It features a 220 MHz small-signal bandwidth and a 170 V/µs slew rate at G = +1. The device supports single-supply operation from 2.7 V to 5.5 V, drawing 4.4 mA per amplifier. It includes dedicated power-down pins for each channel, offering an input voltage range extending 300 mV below the negative rail.

Feature Summary

• Triple-channel architecture with independent power-down control for each amplifier
• Rail-to-rail output stage providing maximum dynamic range near supply rails
• High-speed performance with fast settling time suitable for video applications
• Low distortion characteristics ensuring signal integrity in active filters

Applications

• Automotive infotainment systems
• Imaging and consumer video equipment
• Active filters
• Coaxial cable drivers
• Contact image sensor buffers

Procurement Notes

Verify the specific ordering suffix ARZ-RL against the manufacturer's current datasheet to confirm package type and reel specifications. Ensure the component meets automotive qualification requirements if intended for vehicle electronics. Cross-reference the pinout diagram for the 14-lead SOIC package to prevent layout errors during integration.

Selection Notes

Select this part when multiple high-speed channels are required within a single package footprint. The integrated power-down feature allows for significant power savings in battery-operated devices compared to standard amplifiers without disable functions. Consider the 14-lead SOIC or TSSOP packages for board space constraints.

Part Context

This component belongs to the ADA4891 family of low-cost CMOS amplifiers, which also includes single (ADA4891-1), dual (ADA4891-2), and quad (ADA4891-4) variants. All members share identical electrical characteristics but differ in channel count and package options, allowing designers to scale system complexity while maintaining consistent performance parameters.

Replacement Considerations

Direct functional substitutes include other parts from the ADA4891 series such as the ADA4891-2 or ADA4891-4, provided the channel count matches the design requirements. Verify that any replacement maintains the same rail-to-rail output capability and power-down functionality.

FAQ

How does the power-down feature function on the ADA4891-3?

Each of the three amplifiers has a dedicated power-down pin. Driving these pins high disables the respective amplifier, reducing quiescent current significantly.

What is the input common-mode voltage range?

The input voltage range extends 300 mV below the negative supply rail, allowing for true single-supply operation even with signals near ground.