AD8555ACP-R2

Overview

The AD8555ACPZ-REEL7 is a zero-drift, sensor signal amplifier with digitally programmable gain and output offset. It operates on single-supply voltages from 2.7 V to 5.5 V within an extended industrial temperature range of −40°C to +125°C. The device features a maximum input offset voltage of 10 µV and a drift of 60 nV/°C. Gain is digitally programmable from 70 to 1,280 via a single-wire serial interface. It offers a minimum CMRR of 96 dB, a supply current of 2.5 mA, and a slew rate of 1.2 V/µs. The component is housed in a 16-lead LFCSP package.

Feature Summary

• Digitally programmable gain and output offset voltage using DigiTrim technology
• Zero-drift architecture with low noise auto-zero circuitry
• Integrated open and short wire fault detection capabilities
• Externally programmable output clamp voltage for driving low voltage ADCs

Applications

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

Procurement Notes

Verify the specific suffix 'ACPZ-REEL7' against the manufacturer's official ordering guide to confirm the exact package type (LFCSP-16) and reel packaging specifications. Ensure compatibility with the required operating temperature range and voltage levels before integration. Cross-reference the datasheet revision history for any updates to electrical characteristics or pin configurations that may affect design implementation.

Selection Notes

Select this component when high precision and stability are required for bridge sensor signals without manual calibration. The digital programmability allows for in-circuit adjustment of gain and offset, simplifying system design. Consider the LFCSP-16 package for compact layouts. Verify that the application environment stays within the specified voltage and temperature limits to maintain the guaranteed performance metrics.

Part Context

The AD8555 belongs to Analog Devices' family of zero-drift instrumentation amplifiers designed for sensor signal conditioning. It utilizes patented auto-zero and DigiTrim technologies to achieve high accuracy in a small footprint. This series is intended for applications requiring precise amplification of low-level differential signals from various transducers.

Replacement Considerations

Consult the official datasheet ordering guide for confirmed substitute part numbers. Direct replacements must match the LFCSP-16 package and digital interface requirements.

FAQ

How is the gain programmed?

Gain is digitally programmable from 70 to 1,280 through a single-wire serial interface using the DIGIN pin.

What fault detection features are included?

The device includes open wire and shorted wire fault detection at the input pins (VPOS, VNEG) and the clamp pin (VCLAMP).

Can it drive low voltage ADCs?

Yes, an externally programmable output clamp voltage allows the AD8555 to safely drive analog-to-digital converters operating at lower supply voltages.