ADA4691-2ACBZ-R7

Overview

The ADA4691-2ACBZ-R7 is a dual-channel, low-power operational amplifier from Analog Devices. It features a gain-bandwidth product of 3.6 MHz and a slew rate of 1.3 V/µs. The device operates on a single supply voltage ranging from 2.7 V to 5 V or dual supplies from ±1.35 V to ±2.5 V. Key electrical characteristics include a typical input bias current of 0.5 pA, an offset voltage of 500 µV, and a voltage noise density of 16 nV/√Hz. It incorporates independent shutdown pins for each channel to minimize power consumption. The component is housed in a 9-ball WLCSP package and supports operation across an extended industrial temperature range of -40°C to +125°C.

Feature Summary

• Features rail-to-rail output capability with very low input bias currents suitable for high-impedance sensor interfaces.
• Includes independent shutdown control pins for each amplifier channel to reduce supply current during inactive periods.
• Delivers low noise performance and low distortion characteristics optimized for precision signal conditioning applications.

Applications

• Photodiode amplifiers
• Portable audio devices such as MP3 players and smartphones
• ADC drivers and active filters

Procurement Notes

Verify the specific ordering suffix ACBZ-R7 corresponds to the 9-ball WLCSP package configuration. Confirm that the manufacturer's datasheet specifications align with the required electrical parameters for the target application environment. Ensure compliance with RoHS directives and check for any moisture sensitivity level requirements during storage and handling procedures.

Selection Notes

Select this component when a dual-channel amplifier requires ultra-low input bias current combined with moderate bandwidth. The availability of independent shutdown controls makes it suitable for battery-powered systems requiring power management. Consider the small form factor of the WLCSP package for space-constrained portable designs.

Part Context

This part belongs to the ADA4691 family of low-power, precision operational amplifiers manufactured by Analog Devices. The family includes dual and quad variants with different pin counts and package options. The ADA4691-2 specifically denotes the dual-channel version with shutdown functionality, distinguishing it from the ADA4692 series which lacks shutdown pins.

Replacement Considerations

The ADA4692-2 serves as a functional substitute if shutdown capability is not required. Other dual-channel precision amplifiers from the same manufacturer may be considered based on package compatibility and electrical parameter matching.

FAQ

How does the shutdown feature function?

The ADA4691-2 has two independent shutdown pins, one for each amplifier channel. Driving these pins low places the respective amplifier into a low-power state, significantly reducing supply current.

What is the maximum supply voltage?

The absolute maximum supply voltage rating is 6 V. The recommended operating range is 2.7 V to 5 V for single supply or ±1.35 V to ±2.5 V for dual supply configurations.