ADA4891-1ARJZ-R7

Overview

The ADA4891-1ARJZ-R7 is a single-channel, low-cost CMOS high-speed rail-to-rail amplifier from Analog Devices. It features a 220 MHz small-signal bandwidth and a 170 V/µs slew rate at unity gain. The device operates on a single supply ranging from 2.7 V to 5.5 V, with an input voltage range extending 300 mV below the negative rail. It provides a linear output current of 125 mA and maintains low distortion with a 79 dBc SFDR at 1 MHz. Quiescent current consumption is 4.4 mA per amplifier.

Feature Summary

• Rail-to-rail output stage enables maximum dynamic range by swinging within 50 mV of supply rails
• Input voltage range extends 300 mV below the negative supply rail for true single-supply operation
• High speed performance with fast settling time suitable for demanding signal processing tasks

Applications

• Automotive infotainment systems
• Imaging applications such as CCD buffers
• Consumer video equipment
• Active filters
• Photodiode preamplifiers

Procurement Notes

Verify the specific package configuration matches the design requirements before ordering. Confirm that the automotive qualification status aligns with target application standards. Ensure proper power supply bypassing is implemented during integration to maintain specified noise and stability characteristics.

Selection Notes

Select this component when a single-channel amplifier with rail-to-rail output is required in a compact footprint. It is suitable for designs needing wide input common-mode range relative to the negative rail. Consider the quiescent current and thermal dissipation limits if operating near maximum ambient temperatures.

Part Context

This part belongs to the ADA4891 family, which includes dual, triple, and quad channel variants. All members share identical electrical specifications but differ in pin counts and package options. The single-channel version offers flexibility for space-constrained designs requiring high-speed amplification without unused channels.

Replacement Considerations

ADA4891-2ARJZ-R7 (Dual Channel)

FAQ

Does the input voltage range extend below the negative supply rail?

Yes, the input voltage range extends 300 mV below the negative supply rail.

What is the typical settling time to 0.1%?

The typical settling time to 0.1% is 28 ns.