ADA4691-4ACPZ-R7

Overview

The ADA4691-4ACPZ-R7 is a quad precision operational amplifier featuring rail-to-rail output, low power consumption of 180 µA per channel, and a gain-bandwidth product of 3.6 MHz. It operates on single supplies 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 offset voltage of 500 µV, input bias current of 0.5 pA, and voltage noise density of 16 nV/√Hz. The device includes dual shutdown pins for power management and is housed in a 16-lead LFCSP package.

Feature Summary

• Quad configuration with dual independent shutdown pins controlling pairs of amplifiers
• Rail-to-rail output capability optimized for low-voltage single-supply operation
• Ultra-low input bias current suitable for high-impedance sensor interfaces
• Low distortion performance supporting audio and precision signal processing

Applications

• Photodiode amplifiers
• Portable medical instrumentation
• ADC drivers
• Active filters
• Low-side current sense circuits

Procurement Notes

Verify the specific ordering suffix R7 against the manufacturer's official documentation to confirm reel packaging specifications. Ensure the component matches the exact quad topology and shutdown pin configuration required by the design. Cross-reference the datasheet revision to validate electrical parameters before finalizing procurement.

Selection Notes

Select this component when a quad amplifier with rail-to-rail output and ultra-low input bias current is required. It is suitable for applications demanding low power consumption alongside moderate bandwidth. Verify that the supply voltage range aligns with the system requirements and that the thermal characteristics of the LFCSP package are adequate for the intended environment.

Part Context

This part belongs to the ADA4691 family of low-power, low-noise operational amplifiers manufactured by Analog Devices. The quad variant provides four independent channels within a compact footprint. The series is designed for portable applications where battery life and signal integrity are critical constraints.

Replacement Considerations

ADA4691-4ACPZ

FAQ

How does the shutdown functionality operate?

The ADA4691-4 features two shutdown pins, each controlling a pair of amplifiers. Driving these pins low places the respective amplifiers into a low-power state.

What is the maximum supply voltage?

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