Digital isolators reduce design complexity and cost

They are in stock at distributor Anglia Components.

This family of quad-channel isolators eliminate the need for a separate, isolated dc-to-dc converter in 500 mW, isolated designs, reducing design complexity and cost. Analog Devices iCoupler chip scale transformer technology is used for isolated logic signals and for the magnetic components of the dc-to-dc converter. The result is a small form factor, total isolation solution.

All devices in the family include the same isolated dc-to-dc converter and are differentiated by directional digital channel configurations. The devices are available with popular 5V and 3.3V voltage and associated output current levels as listed in the table below.

Based on the Analog Devices iCoupler technology, the integrated dc-to-dc converter provides regulated, isolated power that meets CISPR 32/EN 55032 Class B limits at a full load on a 2-layer printed circuit board (PCB) with ferrites. This is demonstrated in the measurements below taken from the EVAL-ADUM6421ARNZ and EVAL-ADUM6421AURNZ evaluation boards.

The isolators provide four independent isolation channels specified from DC to 100Mbps and have high common-mode transient immunity of 100kV/µs. The devices are available in 28 lead SOIC package and have a specified operating temperature range from -40°C to +125C

The EVAL-ADUM6421ARNZ board includes the ADuM6421ABRNZ5 quad-channel digital isolator with integrated, isolated dc-to-dc converter.

Alternatively, the EVAL-ADUM6421AURNZ evaluation board leaves the isolator position unpopulated to support evaluation of the isolator family.

The devices can provide regulated, isolated power that meets CISPR 32/EN 55032, Class B limits at full load on a 2-layer printed circuit board (PCB) with ferrite beads, the evaluation boards have been designed to fully demonstrate this capability.

Applications include RS-232 transceivers, Power supply start-up bias and gate drives, Isolated sensor interfaces, Automotive on-board charger (OBC) and Industrial programmable logic controllers (PLCs).

Anglia are offering customers a FREE evaluation board and samples of the ADuM642xA quad-channel isolators with integrated dc-to-dc converter from Analog Devices.