ADA4255ACPZ-R7

Overview

The ADA4255ACPZ-R7 is a zero drift, high voltage programmable gain instrumentation amplifier with an integrated bipolar charge pump. It provides 36 precision gains ranging from 1/16 V/V to 176 V/V and features a robust ±60 V protected 2:1 input multiplexer. Key electrical specifications include a maximum input offset voltage of ±14 μV, a maximum drift of ±0.08 μV/°C, and a minimum CMRR of 111 dB at G = 1 V/V. The device operates on supplies between 2.7 V and 5.5 V, consumes 83 mW at DVDD = 3 V, and functions within a temperature range of −40°C to +105°C.

Feature Summary

• Integrated bipolar charge pump generates high voltage supplies for wide input range without lowering input impedance.
• Zero drift topology self-calibrates DC errors and lower frequency noise for excellent precision over temperature.
• Robust ±60 V protected 2:1 input multiplexer simplifies isolation requirements in industrial systems.
• Dedicated output amplifier supplies provide protection for connected analog-to-digital converters.

Applications

• Universal process control front ends
• Data acquisition systems
• Test and measurement systems
• System power monitoring

Procurement Notes

Verify the specific suffix R7 indicates reel packaging when sourcing. Confirm the LFCSP-28 package dimensions match the PCB footprint. Ensure the design supports the required SPI interface timing and GPIO configurations. Check that the supply voltages align with the specified 2.7 V to 5.5 V operational range for all domains.

Selection Notes

Select this component for applications requiring high precision amplification of small signals in noisy industrial environments. The integrated charge pump eliminates external high-voltage generation components. Consider the 36 available gain settings for flexible sensor interfacing. The zero drift architecture reduces the need for frequent system calibration.

Part Context

This part belongs to Analog Devices' precision instrumentation amplifier family designed for process control. It complements ADCs like the AD7768 and drivers such as the ADA4945-1. The device integrates digital control features including CRC support and fault detection, distinguishing it from standard analog-only amplifiers.

Replacement Considerations

Public confirmed substitute part numbers are not provided in the source material.