ADUM4195-1WBRIZ-R7

Overview

The ADUM4195-1WBRIZ-R7 is an isolated amplifier based on iCoupler technology, featuring a fixed gain of 1 and single-ended output. It operates within a voltage supply range of 4.5 V to 5.5 V for both sides. Key electrical parameters include a maximum offset error of ±5 mV at 25°C and drift of ±130 µV/°C. The device offers a bandwidth of 210 kHz and supports an input voltage range from 0.25 V to 4.3 V. It provides galvanic isolation up to 5000 V rms and is qualified for automotive applications under AEC-Q100 standards.

Feature Summary

• High stability with low offset and gain error that does not change over lifetime or temperature
• High-impedance input suitable for isolated voltage measurement without loading the source
• Certified for reinforced insulation up to 5000 V rms according to UL 1577
• Immune to external magnetic fields ensuring DC correctness

Applications

• Inverters
• DC-DC converters
• On-board chargers

Procurement Notes

Verify the specific suffix 'R7' indicates reel packaging containing 400 units as per the ordering guide. Confirm the 'W' suffix denotes AEC-Q100 automotive qualification. Ensure the component matches the RI-8-1 package option description. Cross-reference the manufacturer part number against official Analog Devices documentation to confirm RoHS compliance status.

Selection Notes

Select this component for applications requiring high common-mode transient immunity and stable gain over wide temperature ranges. The fixed unity gain simplifies design by eliminating external resistor networks for gain setting. Consider the 210 kHz bandwidth for dynamic signal requirements. Evaluate thermal resistance characteristics relative to PCB layout constraints for optimal heat dissipation during continuous operation.

Part Context

This part belongs to the ADuM4195 family of isolation amplifiers utilizing iCoupler technology. It serves as a robust alternative to optocoupler-based solutions which suffer from uncertain current transfer ratios. The family includes variants with different packaging and automotive qualifications, providing flexibility for industrial and automotive power electronics designs requiring precise isolated sensing.

Replacement Considerations

ADUM4195-1BRIZ-R7

FAQ

How does the ADUM4195-1 handle DC correctness?

The device uses periodic refresh pulses sent through the coreless transformer to ensure the decoder maintains the correct input state. If no transitions occur for more than approximately 3 µs, a watchdog timer forces the output to a default high-impedance state.

What is the impact of external magnetic fields on performance?

The ADUM4195-1 is immune to external magnetic fields. The decoder can tolerate induced noise up to 1.6 V, allowing safe operation even with significant external field strengths without causing faulty output transitions.