AD8655ARZ-REEL

Overview

The AD8655ARZ-REEL is a single-channel, low noise, precision CMOS operational amplifier manufactured by Analog Devices Inc. It utilizes DigiTrim technology to achieve high DC accuracy with a maximum offset voltage of 250 µV over the common-mode range and a drift of 0.4 µV/°C typical. The device features a gain bandwidth product of 28 MHz, a slew rate of 11 V/µs, and an input voltage noise density of 2.7 nV/√Hz at 10 kHz. It operates on a supply voltage from 2.7 V to 5.5 V, draws 3.7 mA typical supply current, and supports rail-to-rail input and output swing within an operating temperature range of −40°C to +125°C.

Feature Summary

• Leverages DigiTrim technology for post-package trimming to ensure high DC precision and low offset voltage stability.
• Provides true rail-to-rail input and output capability, enabling full dynamic range operation in single-supply systems.
• Delivers industry-leading low noise performance with minimal total harmonic distortion plus noise for high-fidelity signal processing.
• Maintains sub-picoampere input bias currents suitable for high-impedance sensor interfaces.

Applications

• ADC and DAC buffers
• Audio microphone pre-amplifiers and mixing consoles
• Industrial controls and precision filters
• Automotive collision avoidance systems

Procurement Notes

Verify that the specific ordering suffix matches the required package type and reel configuration. Confirm RoHS compliance status as indicated by the 'Z' suffix. Ensure the automotive qualification requirements are met if applicable, noting that standard commercial parts differ from qualified automotive models. Cross-reference the manufacturer part number against official distributor catalogs to confirm availability and authenticity before procurement.

Selection Notes

Select this component when designing low-voltage, single-supply systems requiring high precision and low noise. The rail-to-rail architecture makes it suitable for buffering ADCs where maximizing dynamic range is critical. Consider the 28 MHz bandwidth and 11 V/µs slew rate for applications demanding fast settling times. Verify that the 3.7 mA supply current aligns with system power budget constraints compared to lower-power alternatives.

Part Context

This component belongs to the AD8655/AD8656 family of precision amplifiers designed for low-voltage applications. The AD8655 variant provides a single channel, while the AD8656 offers dual channels. Both utilize the same DigiTrim process and share identical electrical characteristics regarding noise, speed, and precision, differing only in channel count and pinout configuration.

Replacement Considerations

The AD8655ARZ-REEL7 serves as a direct packaging alternative using a different reel quantity specification. Designers should verify that any substitute maintains the 2.7 nV/√Hz noise floor and 28 MHz bandwidth to preserve system performance integrity.