AD8661ACPZ-R2

Overview

The AD8661ACPZ-R2 is a single-channel precision CMOS operational amplifier manufactured by Analog Devices Inc. It features rail-to-rail output and operates on a single supply voltage ranging from 5 V to 16 V. Key electrical parameters include a gain-bandwidth product of 4 MHz, a slew rate of 3.5 V/µs, and an input offset voltage of 30 µV. The device draws 1.4 mA of operating current and provides an output current of 140 mA per channel. It utilizes DigiTrim technology for low offset characteristics and is housed in an 8-lead LFCSP package.

Feature Summary

• Utilizes DigiTrim adjustment technology to achieve low input offset voltage specifications.
• Features rail-to-rail output capability suitable for single-supply applications.
• Combines low input bias current with wide signal bandwidth for high-impedance sensor interfacing.

Applications

• Photodiode amplification systems
• High-performance analog-to-digital converter drivers
• Medical monitoring equipment

Procurement Notes

Verify the specific suffix R2 against official Analog Devices documentation to confirm tape-and-reel packaging details and moisture sensitivity levels. Ensure compatibility with the 8-lead LFCSP footprint during procurement planning. Cross-reference the manufacturer part number with authorized distributor catalogs to validate authenticity and traceability before finalizing orders.

Selection Notes

Select this component when designing circuits requiring high DC accuracy with low power consumption. The combination of low noise and wide bandwidth makes it suitable for replacing JFET amplifiers in cost-sensitive designs. Verify that the 16 V maximum supply voltage aligns with system requirements and that the LFCSP package fits the available PCB real estate constraints.

Part Context

This part belongs to the AD8661 series of precision amplifiers, which includes dual (AD8662) and quad (AD8664) variants. The series is characterized by its CMOS architecture and DigiTrim calibration. While other variants share similar electrical performance, they differ in channel count and pin configurations, such as the 14-pin TSSOP used by the quad version.

Replacement Considerations

Direct functional substitutes within the same family include the AD8661ARZ and AD8661ACPZ-REEL7. When replacing, verify that the package type matches the existing board layout, as the ARZ variant uses an SOIC-8 package instead of the LFCSP-8 found in the ACPZ series.