ADA4891-3WARUZ-R7

Overview

The ADA4891-3WARUZ-R7 is a triple-channel, high-speed CMOS operational amplifier from Analog Devices. It features a 220 MHz small-signal bandwidth and a 170 V/µs slew rate at G = +1. The device supports single-supply operation with a voltage range of 2.7 V to 5.5 V. Its rail-to-rail output stage swings within 50 mV of the supply rails. Key DC parameters include an input offset voltage of ±3.1 mV (W grade) and an input bias current of ±50 nA. It operates over an extended temperature range of −40°C to +125°C.

Feature Summary

• Features true single-supply capability with an input voltage range extending 300 mV below the negative rail.
• Includes dedicated power-down pins for each channel to reduce quiescent current when disabled.
• Provides rail-to-rail output swing to maximize dynamic range in low-voltage applications.

Applications

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

Procurement Notes

Verify that the W suffix indicates the specific input offset voltage and bias current grades required for your design. Confirm the RUZ package designation matches your PCB footprint requirements. Ensure the R7 tape-and-reel packaging aligns with your automated assembly capabilities. Cross-reference the automotive qualification status if operating in harsh environments.

Selection Notes

Select this component when multiple high-speed channels are needed in a compact form factor. The integrated power-down feature allows for significant power savings in battery-operated or thermal-constrained designs. Verify that the 125 mA output current capability meets the drive requirements of your load impedance.

Part Context

This part belongs to the ADA4891 family, which includes single, dual, and quad variants. The triple configuration offers a balance between channel count and package size. The W grade specifies tighter DC performance limits compared to standard grades. The device is designed for cost-sensitive, high-volume applications requiring robust performance.

Replacement Considerations

ADA4891-3ARUZ-R7

FAQ

How does the power-down feature function on the ADA4891-3?

The ADA4891-3 includes dedicated power-down pins (PD1, PD2, PD3). Driving these pins low disables the respective amplifier, reducing its supply current significantly while maintaining the rest of the device's functionality.

What is the input common-mode voltage range?

The input common-mode voltage range extends from 300 mV below the negative supply rail to approximately 800 mV below the positive supply rail, enabling true single-supply operation.