ADA4254ARUZ-R7

Overview

The ADA4254ARUZ-R7 is a zero drift, high voltage, low power programmable gain instrumentation amplifier (PGIA) from Analog Devices Inc. It features 12 binary weighted gains from 1/16 V/V to 128 V/V and three scaling gains of 1 V/V, 1.25 V/V, and 1.375 V/V. The device offers excellent DC precision with an input offset voltage of ±14 μV maximum and drift of ±0.08 μV/°C maximum. It includes a ±60 V protected input multiplexer, integrated EMI filtering, and seven GPIO ports. Power consumption is 22 mW at ±12 V supplies. It operates within a temperature range of −40°C to +105°C and is housed in a 28-lead LFCSP package.

Feature Summary

• Zero drift topology self-calibrates DC errors and low frequency noise for excellent DC precision across the specified temperature range.
• Integrated input multiplexer provides ±60 V overvoltage protection and switching capability between two input sources.
• Includes excitation current sources for biasing sensors such as RTDs and supports SPI communication with CRC error detection.
• Features internal fault detection and wire break test currents to facilitate system safety integrity level certification.

Applications

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

Procurement Notes

Verify the specific suffix R7 indicates reel packaging when sourcing. Confirm the component matches the 28-lead LFCSP outline dimensions. Ensure the operating environment stays within the specified -40°C to +105°C range. Check that supply voltages do not exceed absolute maximum ratings to prevent damage. Validate compatibility with ADC synchronization requirements if used in data acquisition chains.

Selection Notes

Select this PGIA for applications requiring high precision and robustness in industrial environments. The zero drift architecture minimizes calibration needs compared to standard amplifiers. Consider the wide dynamic range and multiple gain settings for versatile signal conditioning. Evaluate the low power consumption for battery-operated or thermally constrained systems. Ensure the interface logic levels match the digital supply voltage.

Part Context

This component belongs to the ADA4254 family of programmable gain instrumentation amplifiers designed by Analog Devices. It is optimized for process control and industrial applications demanding high accuracy. The device integrates analog and digital functions to simplify system design. It serves as a key building block for universal modules requiring safety integrity.

Replacement Considerations

Companion products include ADCs like AD4007 and AD7768. Voltage references such as ADR4550 and ADR3450 are recommended for stable operation. Amplifier drivers like ADA4945-1 may be used downstream. Verify pinout and register compatibility when substituting similar PGIA devices.

FAQ

How does the ADA4254 handle DC precision?

It uses a zero drift amplifier topology that self-calibrates DC errors and low frequency 1/f noise, achieving excellent DC precision over the entire specified temperature range.

What protection does the input multiplexer offer?

The input multiplexer provides ±60 V protection to the high impedance inputs of the amplifier while allowing switching between two input sources.

Can the device support safety integrity level certification?

Yes, various safety features including internal fault detection and SPI checksum support ease system safety integrity level certification.