AD8661ARZ-REEL7

Overview

The AD8661ARZ-REEL7 is a single-channel precision CMOS operational amplifier from Analog Devices, housed in an 8-SOIC package. It features DigiTrim technology for high accuracy, with a gain-bandwidth product of 4 MHz and a slew rate of 3.5 V/µs. Key electrical parameters include a maximum input offset voltage of 30 µV, input bias current of 1 pA, and rail-to-rail output capability. The device operates on a supply voltage range of 5 V to 16 V, drawing 1.4 mA per channel while delivering 140 mA output current. It offers 110 dB CMRR and PSRR, with an input voltage noise density of 12 nV/√Hz.

Feature Summary

• DigiTrim precision technology ensures low input offset voltage and minimal drift over temperature.
• Rail-to-rail output stage provides full signal swing across the entire supply voltage range.
• CMOS architecture delivers ultra-low input bias current for high-impedance source applications.

Applications

• Precision data acquisition systems requiring low offset and drift
• High-impedance sensor signal conditioning circuits
• Medical instrumentation and diagnostic equipment

Procurement Notes

Verify the specific suffix REEL7 indicates tape-and-reel packaging when ordering. Confirm the 8-SOIC package variant matches your PCB footprint requirements. Ensure the operating temperature range of -40°C to +125°C aligns with your system's environmental specifications before finalizing procurement.

Selection Notes

Select this component for applications demanding high DC accuracy combined with moderate bandwidth. The rail-to-rail output is suitable for single-supply systems where maximizing dynamic range is critical. Consider the 1 pA bias current for interfacing with high-impedance sensors or capacitive sources where leakage currents must be minimized.

Part Context

This part belongs to the AD8661 series of precision amplifiers, which utilize DigiTrim laser trimming for enhanced performance. The series includes variants with different packaging options, such as tube and reel configurations. The AD8661ARZ-REEL7 specifically denotes the surface-mount SOIC version supplied in reels for automated assembly processes.

Replacement Considerations

Check for direct pin-compatible alternatives within the AD8661 family that may offer different packaging or temperature grades. Verify if other precision CMOS op-amps with similar GBP and Vos specifications meet your design constraints without requiring schematic modifications.