ADA4691-4ACPZ-R2

Overview

The ADA4691-4ACPZ-R2 is a quad, low-power, rail-to-rail output operational amplifier from Analog Devices. It features a gain bandwidth product of 3.6 MHz and a typical supply current of 180 μA per channel. The device operates on a single supply 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. It includes dual shutdown pins controlling pairs of amplifiers and is housed in a 16-lead LFCSP package.

Feature Summary

• Quad configuration with dual independent shutdown pins for power management
• Rail-to-rail output capability supporting low-voltage single-supply operation
• Low input bias current suitable for high-impedance sensor interfaces
• Integrated thermal performance within a compact lead frame chip scale package

Applications

• Photodiode amplifiers
• Portable medical instrumentation
• ADC drivers
• Active filters

Procurement Notes

Verify the specific ordering suffix R2 against the manufacturer's official documentation to confirm reel packaging specifications. Ensure compatibility with the 16-lead LFCSP footprint and check moisture sensitivity levels prior to surface mount assembly. Confirm that the component meets the required industrial temperature range specifications for the intended deployment environment.

Selection Notes

Select this component when a quad amplifier topology is required alongside low power consumption and rail-to-rail output swing. The integrated shutdown functionality distinguishes it from non-shutdown variants like the ADA4692-4. Evaluate the 3.6 MHz bandwidth against application signal requirements to ensure adequate slew rate and settling time performance.

Part Context

This part belongs to the ADA4691 family of precision amplifiers designed for portable applications. It serves as the quad-channel counterpart to the dual-channel ADA4691-2. The series provides a balance of low noise and low power, targeting battery-operated consumer electronics and instrumentation where space and energy efficiency are critical constraints.

Replacement Considerations

The ADA4692-4 offers identical electrical performance but lacks the shutdown feature.