AD8655ARMZ-R2

Overview

The AD8655ARMZ-R2 is a single-channel, low noise, precision CMOS operational amplifier manufactured by Analog Devices Inc. It features rail-to-rail input and output capabilities, operating within a supply voltage range of 2.7 V to 5.5 V. The device utilizes DigiTrim technology for high DC accuracy, achieving a maximum offset voltage of 250 µV over the common-mode voltage range. Key electrical specifications include 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 reliably across a temperature range of −40°C to +125°C.

Feature Summary

• Utilizes DigiTrim technology for post-package trimming to achieve high DC precision and low offset voltage.
• Features true rail-to-rail architecture allowing input and output signal swing to extend to both supply rails.
• Provides industry-leading low noise performance with sub-pA input bias current suitable for high-impedance sources.
• Designed without phase reversal for common-mode voltages within the power supply range.

Applications

• ADC and DAC buffers
• Audio microphone pre-amplifiers and mixing consoles
• Industrial process controls and data acquisition systems
• Precision active filters and PLL filters

Procurement Notes

Verify that the specific ordering suffix '-R2' corresponds to the reel packaging format as defined in the manufacturer's official documentation. Confirm RoHS compliance status and automotive qualification requirements if applicable to the target application environment before finalizing procurement.

Selection Notes

Select this component when low voltage noise and high precision are critical in single-supply systems. The rail-to-rail I/O capability maximizes dynamic range compared to standard op amps. Ensure the circuit design accounts for driving capacitive loads, as external compensation may be required for stability with heavy capacitance.

Part Context

This part belongs to the AD8655/AD8656 family of low noise, precision CMOS amplifiers. The AD8655 denotes the single-channel version, while the AD8656 is the dual-channel variant. Both share identical electrical characteristics and utilize the same DigiTrim manufacturing process for enhanced accuracy.

Replacement Considerations

Direct functional equivalents within the same package and specification profile include the AD8655ARZ and AD8655ARMZ. Verify pinout compatibility and thermal resistance parameters when substituting between SOIC and MSOP packages.