ADA4891-4ARZ-R7

Overview

The ADA4891-4ARZ-R7 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) and achieves a slew rate of 170 V/µs. It settles to within 0.1% in 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

• Rail-to-rail output stage enables maximum dynamic range by swinging to within 50 mV of the supply rails.
• High-speed performance with fast settling time suitable for demanding signal processing applications.
• Low power consumption per amplifier channel while maintaining high linearity and distortion characteristics.

Applications

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

Procurement Notes

Verify that the specific ordering suffix '-R7' corresponds to the reel packaging format required for automated assembly processes. Confirm that the component meets automotive qualification standards if intended for vehicle electronics. Ensure the package type matches the PCB footprint design constraints before finalizing procurement orders.

Selection Notes

Select this component when multiple high-speed channels are required within a single integrated circuit. It is appropriate for designs needing rail-to-rail output swing without requiring dual supplies. Consider the thermal dissipation limits and layout requirements for driving capacitive loads when integrating into the system architecture.

Part Context

This part belongs to the ADA4891 family, which includes single, dual, triple, and quad configurations. The quad version integrates four independent amplifiers in a 14-lead SOIC or TSSOP package. The family is designed for cost-sensitive applications requiring high performance in imaging and video signal paths.

Replacement Considerations

Direct functional replacements within the same family include the ADA4891-1, ADA4891-2, and ADA4891-3, provided the channel count requirement can be adjusted. Verify pin compatibility and package dimensions when substituting between different channel counts in the series.