ADA4891-4ARZ-RL

Overview

The ADA4891-4ARZ-RL is a quad-channel, low-cost CMOS high-speed operational amplifier manufactured by Analog Devices Inc. It features rail-to-rail output capability and operates on a single supply voltage ranging from 2.7 V to 5.5 V. The device provides a small-signal bandwidth of 220 MHz at unity gain (G = +1) with a slew rate of 170 V/µs. It achieves a settling time to 0.1% within 28 ns and delivers a linear output current of 125 mA. Key electrical specifications include an input offset voltage of ±2.5 mV, an input bias current of ±50 pA, and an input voltage noise density of 9 nV/√Hz.

Feature Summary

• High-speed performance with 220 MHz bandwidth and 170 V/µs slew rate for fast signal processing
• Rail-to-rail output stage enabling maximum dynamic range by swinging within 50 mV of supply rails
• Low distortion characteristics suitable for precision video and imaging applications
• Single-supply operation with extended input common-mode range extending below the negative rail

Applications

• Automotive infotainment systems
• Imaging and consumer video equipment
• Active filters
• Coaxial cable drivers
• Photodiode preamplifiers

Procurement Notes

Verify that the specific ordering suffix ARZ-RL corresponds to the tape-and-reel packaging variant rather than tube packaging when sourcing components. Confirm the manufacturer is Analog Devices Inc. and check RoHS compliance status. Ensure the component meets automotive qualification requirements if intended for vehicle electronics. Validate the package type matches the design schematic before procurement.

Selection Notes

Select this component for designs requiring multiple high-speed amplification channels in a compact footprint. The quad configuration reduces board space compared to using individual single-channel devices. Consider the 14-lead SOIC or TSSOP package availability. Evaluate thermal dissipation capabilities against ambient temperature conditions. Verify that the 125 mA output current meets load drive requirements.

Part Context

This part belongs to the ADA4891 family, which includes single (ADA4891-1), dual (ADA4891-2), triple (ADA4891-3), and quad (ADA4891-4) channel variants. All members share identical core electrical specifications and architectural features. The quad version integrates four independent amplifiers into one package. The family is designed for cost-sensitive high-performance applications.

Replacement Considerations

Direct functional substitutes within the same family include the ADA4891-1, ADA4891-2, and ADA4891-3. These parts offer identical electrical performance but differ in channel count. Cross-family replacements require verification of bandwidth, slew rate, and pinout compatibility.