ADA4891-1WARJZ-R7

Overview

The ADA4891-1WARJZ-R7 is a single-channel, high-speed CMOS operational amplifier from Analog Devices. It features a true rail-to-rail output stage capable of swinging within 50 mV of the supply rails and an input voltage range extending 300 mV below the negative rail. The device operates on a wide supply range of 2.7 V to 5.5 V with a quiescent current of 4.4 mA per amplifier. Key dynamic performance metrics include a small-signal bandwidth of 240 MHz at unity gain, a slew rate of 170 V/µs, and a settling time to 0.1% of 28 ns. It provides low distortion with a 79 dBc SFDR at 1 MHz and delivers a linear output current of 125 mA.

Feature Summary

• High-speed CMOS architecture delivering fast settling times and wide bandwidth for demanding signal processing applications.
• True rail-to-rail output capability maximizing dynamic range by swinging within 50 mV of the supply rails.
• Single-supply operation with extended input common-mode range extending 300 mV below the negative rail.
• Qualified for automotive applications and rated for an extended operating temperature range.

Applications

• Automotive infotainment systems
• Automotive driver assistance systems
• Imaging and consumer video equipment
• Active filters and coaxial cable drivers

Procurement Notes

Verify the specific ordering suffix against official documentation to confirm package type and reel specifications. Confirm that the W grade meets the required DC offset and bias current tolerances for your design. Ensure the component is sourced through authorized channels to guarantee authenticity and traceability. Check for any recent revisions in the datasheet that may affect pinout or electrical characteristics.

Selection Notes

Select this component when a single-channel, high-bandwidth amplifier is required in a compact surface-mount package. The W grade offers tighter DC specifications compared to standard grades. Consider the 240 MHz bandwidth and 170 V/µs slew rate for high-frequency signal integrity. Evaluate the 4.4 mA quiescent current against power constraints in portable or battery-operated designs.

Part Context

This part belongs to the ADA4891 family of low-cost, high-speed CMOS amplifiers, which includes dual (ADA4891-2), triple (ADA4891-3), and quad (ADA4891-4) variants. The family shares identical core electrical performance but differs in channel count and packaging options such as SOIC, MSOP, SOT-23, and TSSOP. The ADA4891-1WARJZ-R7 specifically denotes the single-channel version in a 5-lead SOT-23 package with automotive qualification.

Replacement Considerations

Direct functional replacements within the same family include the ADA4891-1ARZ-R7 (standard grade, SOT-23) or ADA4891-1ARZ (tube). For non-automotive applications, the ADA4891-1ARJZ-R7 is available in the same SOT-23 package without the W automotive qualification suffix.