ADUM4470CRIZ

Overview

The ADUM4470CRIZ is a quad-channel digital isolator from Analog Devices Inc., utilizing iCoupler magnetic coupling technology. It features an integrated IsoPower isolated DC-to-DC converter, eliminating the need for external isolation supplies. The device offers 5000Vrms isolation voltage and supports data rates up to 25Mbps with a common-mode transient immunity of 25kV/µs. Operating temperatures range from -40°C to +105°C. It is housed in a 20-SOIC package.

Feature Summary

• Integrates an isolated switching regulator to provide power across the isolation barrier without external components.
• Provides reinforced electrical isolation rated at 5000Vrms for high-voltage protection.
• Utilizes on-chip microtransformer technology for bidirectional signal transmission with low propagation delay.

Applications

• Isolated PWM control and transformer driver circuits
• Industrial automation systems requiring galvanic isolation
• Medical equipment with safety isolation requirements

Procurement Notes

Verify the specific suffix (e.g., CRIZ vs. CRIZ-RL) to confirm packaging type, as tube and reel variants share identical electrical specifications but differ in shipping units. Confirm RoHS3 compliance status and moisture sensitivity level (MSL 3) prior to soldering. Ensure the supplier provides valid traceability documentation for this Analog Devices component.

Selection Notes

Select this component when an integrated isolated power supply is required alongside four channels of digital isolation. It is suitable for applications needing 25Mbps data throughput and 5000Vrms isolation. Compare against the ADUM4400 series if higher data rates are needed but integrated power is not required. Verify that the 20-SOIC footprint fits the design constraints.

Part Context

This part belongs to the ADuM447x family of quad-channel digital isolators with integrated IsoPower regulators. The family includes variants such as ADUM4471, ADUM4472, ADUM4473, and ADUM4474, which differ primarily in channel directionality or configuration while sharing the same core isolation and power management architecture.

Replacement Considerations

ADUM4470CRIZ-RL is a verified equivalent variant differing only in packaging format (reel versus tube). No other direct functional substitutes are confirmed in the provided documentation.

FAQ

Does the ADUM4470CRIZ require external components for the isolated power supply?

No, it integrates a regulated DC-to-DC isolated power supply, eliminating the need for external isolation transformers or power components.

What is the maximum common-mode transient immunity of this device?

The device guarantees a minimum common-mode transient immunity of 25kV/µs.