ADA4891-1ARZ-RL

Overview

The ADA4891-1ARZ-RL is a single-channel, high-speed CMOS 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 240 MHz at unity gain (G = +1) with a typical 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 a common-mode rejection ratio of 88 dB.

Feature Summary

• Rail-to-rail output stage enables maximum dynamic range by swinging to within 50 mV of the supply rails.
• Input voltage range extends 300 mV below the negative supply rail for flexible single-supply operation.
• Low distortion performance with 79 dBc SFDR at 1 MHz frequency.
• High linearity with 125 mA linear output current capability.

Applications

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

Procurement Notes

Verify that the ordering suffix -RL corresponds to the tape-and-reel packaging configuration required for automated assembly processes. Confirm the specific package type matches the design footprint requirements. Ensure the component meets automotive qualification standards if utilized in vehicle electronics. Cross-reference the manufacturer part number against official distributor catalogs to validate authenticity and revision status before procurement.

Selection Notes

Select this component when high-speed signal processing is required alongside low power consumption constraints. The wide supply voltage range supports both 3 V and 5 V system architectures. Consider the rail-to-rail output feature for maximizing dynamic range in low-voltage environments. Evaluate the 240 MHz bandwidth and fast settling times for applications demanding precise video signal reconstruction or high-frequency filtering.

Part Context

This device belongs to the ADA4891 family, which includes dual, triple, and quad channel variants. All members share identical core electrical characteristics, including bandwidth, slew rate, and power consumption. The primary distinction lies in the number of integrated amplifiers per package and the corresponding pin configurations. This single-channel version utilizes an 8-lead SOIC package.

Replacement Considerations

ADA4891-1ARZ