AD8555ARZ-REEL

Overview

The AD8555ARZ-REEL is a zero-drift, digitally programmable sensor signal amplifier manufactured by Analog Devices Inc. It integrates auto-zero and DigiTrim technologies to achieve high precision with very low offset voltage (10 µV maximum) and drift (60 nV/°C maximum). The device features a single-wire serial interface for programmable gain ranging from 70 to 1,280 and ratiometric output offset adjustment. It operates on a single supply of 2.7 V to 5.5 V within an industrial temperature range of -40°C to +125°C.

Feature Summary

• Digitally programmable gain and output offset via a single-wire serial interface
• Integrated open and short wire fault detection capabilities
• Externally programmable output clamp voltage for safe ADC driving
• Stable operation with any capacitive load

Applications

• Pressure and position sensors
• Thermocouple amplifiers
• Industrial weigh scales
• Precision current sensing
• Strain gages

Procurement Notes

Verify the REEL suffix indicates tape-and-reel packaging configuration. Confirm the ARZ designation corresponds to the SOIC-8 package variant rather than the LFCSP-16 option. Ensure the component meets RoHS compliance standards as specified in the manufacturer documentation before finalizing procurement orders.

Selection Notes

Select this component when high DC accuracy and low drift are required for bridge sensor signals. The digital interface allows field calibration of gain and offset. Consider the external capacitor requirement for the low-pass filter function at the FILT/DIGOUT pin. Verify that the single-wire interface timing requirements align with the host controller's capabilities.

Part Context

This part belongs to the AD8555 family of zero-drift sensor signal amplifiers. It utilizes Analog Devices' patented low noise auto-zero and DigiTrim technologies to minimize offset errors. The device provides a compact solution for converting variable sensor outputs into well-defined voltage ranges suitable for analog-to-digital conversion systems.

Replacement Considerations

No public confirmed substitute part numbers are available in the provided documentation.