AD8663ARZ

Overview

The AD8663ARZ is a single-channel, precision, low-noise CMOS operational amplifier manufactured by Analog Devices. It features rail-to-rail output capability and operates on supply voltages ranging from 5 V to 16 V (single) or ±2.5 V to ±8 V (dual). The device utilizes DigiTrim® trimming technology to achieve a maximum offset voltage of 175 μV at 5 V and 300 fA input bias current. Key electrical parameters include a gain bandwidth product of 540 kHz, a slew rate of 0.3 V/μs, and a voltage noise density of 23 nV/√Hz at 1 kHz. It is unity-gain stable and housed in an 8-lead SOIC package.

Feature Summary

• Utilizes patented DigiTrim® trimming technique for low offset voltage and drift
• Features rail-to-rail output stage for increased dynamic range
• Provides very low input bias current suitable for high impedance sensors
• Operates with extended industrial temperature range

Applications

• Sensor front ends
• Transimpedance amplifiers
• Photodiode amplification
• Low power ADC drivers
• Medical diagnostic instruments

Procurement Notes

Verify the specific package variant against the ordering guide, as the AD8663 family includes LFCSP options alongside the standard SOIC. Confirm RoHS compliance status indicated by the 'Z' suffix. Ensure the selected part matches the required channel count, as dual and quad variants exist within the same datasheet. Cross-reference pin configurations carefully to avoid layout errors between different package types.

Selection Notes

Select this component when low power consumption and high DC precision are required in a single-supply environment. The rail-to-rail output makes it suitable for driving data converters directly. Consider the AD8667 or AD8669 if multiple channels are needed. Evaluate thermal resistance values based on the chosen package type for heat dissipation requirements in enclosed designs.

Part Context

The AD8663 belongs to a family of low noise, precision, 16 V CMOS rail-to-rail operational amplifiers that also includes the dual AD8667 and quad AD8669 models. These devices share similar electrical characteristics but differ in channel count and available packaging options. The series is designed to replace higher-priced JFET amplifiers in applications requiring low bias current and low noise.

Replacement Considerations

Direct functional substitutes within the same family include the AD8667 (dual) and AD8669 (quad), provided pin compatibility and channel requirements align. Other packages such as LFCSP or MSOP offer alternative form factors for the same core functionality.