ADA4891-1ARZ

Overview

The ADA4891-1ARZ is a single-channel CMOS high-speed operational amplifier manufactured by Analog Devices Inc. It features true single-supply operation with an input voltage range extending 300 mV below the negative rail and a rail-to-rail output stage capable of swinging to within 50 mV of each supply rail. The device supports a wide supply voltage range from 2.7 V to 5.5 V, drawing a quiescent current of 4.4 mA per amplifier. Key electrical specifications include a small-signal bandwidth of 240 MHz at a gain of +1, a slew rate of 170 V/µs, and a settling time to 0.1% of 28 ns. It provides a linear output current of 125 mA at −40 dBc distortion.

Feature Summary

• High-speed performance with fast settling characteristics suitable for demanding signal processing applications
• True single-supply capability with extended input common-mode range extending below the negative rail
• Rail-to-rail output stage maximizing dynamic range by swinging close to both supply rails
• Low power consumption combined with low distortion metrics for efficient system design

Applications

• Automotive infotainment systems
• Imaging applications such as CCD buffers and contact image sensor buffers
• Consumer video equipment
• Active filters
• Coaxial cable drivers

Procurement Notes

Verify the specific package type and temperature grade when ordering. Confirm that the component meets automotive qualification requirements if intended for vehicle electronics. Ensure proper handling procedures are followed due to ESD sensitivity. Check datasheet revisions for any parameter updates before finalizing designs.

Selection Notes

Select this component for applications requiring high bandwidth and fast transient response in a single-supply environment. Consider the 8-lead SOIC package for standard surface-mount assembly. Evaluate thermal dissipation limits based on ambient temperature and load conditions to ensure reliable operation within the specified junction temperature range.

Part Context

This part belongs to the ADA4891 family of low-cost, high-speed CMOS amplifiers produced by Analog Devices Inc. The family includes dual (ADA4891-2), triple (ADA4891-3), and quad (ADA4891-4) channel variants. All members share similar electrical characteristics but differ in channel count and available package options, providing flexibility for multi-channel system designs.

Replacement Considerations

Direct substitutes within the same family include the ADA4891-2ARZ (dual channel) and ADA4891-3ARZ (triple channel). Verify pin compatibility and channel count requirements before substitution. Other packages like SOT-23 or MSOP may offer physical alternatives but require schematic review.