ADA4891-4ARUZ

Overview

The ADA4891-4ARUZ is a quad-channel, low-cost CMOS operational amplifier featuring high-speed performance and rail-to-rail output capability. It operates on a single supply voltage ranging from 2.7 V to 5.5 V. Key electrical specifications include a small-signal bandwidth of 220 MHz at unity gain (G = +1), a slew rate of 170 V/µs, and a settling time to 0.1% of 28 ns. The device provides a linear output current of 125 mA and maintains low distortion with a Spurious-Free Dynamic Range (SFDR) of 79 dBc at 1 MHz. Input characteristics include an input bias current of ±50 pA and an input offset voltage of ±2.5 mV. The amplifier is housed in a 14-lead TSSOP package and supports an extended operating temperature range from −40°C to +125°C.

Feature Summary

• Rail-to-rail output stage enables maximum dynamic range by swinging within 50 mV of the supply rails.
• High-speed architecture delivers fast settling times and wide bandwidth for demanding signal processing tasks.
• Low power consumption design suitable for battery-operated applications with 4.4 mA quiescent current per amplifier.
• Input voltage range extends 300 mV below the negative rail, facilitating true single-supply operation.

Applications

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

Procurement Notes

Verify the specific ordering suffix ARUZ corresponds to the 14-lead TSSOP package variant when sourcing. Confirm that the component meets automotive qualification requirements if intended for vehicle electronics. Ensure the selected part number matches the exact channel count and package style required for the PCB layout. Cross-reference the manufacturer's latest datasheet revision to validate all electrical parameters against the design specifications.

Selection Notes

Select this component for designs requiring high speed and low cost in a compact quad configuration. The rail-to-rail output is critical for maximizing dynamic range in single-supply systems. Consider the 220 MHz bandwidth and 170 V/µs slew rate for high-frequency signal integrity. Verify thermal dissipation capabilities within the 14-lead TSSOP package for the specific ambient temperature conditions of the application.

Part Context

The ADA4891-4ARUZ belongs to the ADA4891 family of low-cost, high-speed CMOS amplifiers produced by Analog Devices. This family includes single, dual, triple, and quad variants, offering consistent performance characteristics across different channel counts. The series is designed to provide versatility for various analog signal processing needs while maintaining a low price point. The quad version specifically integrates four independent amplifiers into a single package to save board space.

Replacement Considerations

ADA4891-4ARZ is a direct pin-compatible alternative available in a 14-lead SOIC package.