Quad-Channel Isolators with Integrated DC-to-DC Converter (3:1 directionality)

The ADuM6420A/ADuM6421A/ADuM6422A/ADuM6423A/ADuM6424A1 are quad-channel digital isolators with an isoPower®, integrated, isolated dc-to-dc converter. Based on the Analog Devices, Inc., iCoupler® technology, the 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. Popular voltage combinations and the associated output current levels are listed in Table 1 in the data sheet.

The ADuM6420A/ADuM6421A/ADuM6422A/ADuM6423A/ADuM6424A eliminate the need for a separate, isolated dc-to-dc converter in 500 mW, isolated designs. The 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.

The ADuM6420A/ADuM6421A/ADuM6422A/ADuM6423A/ADuM6424A isolators provide four independent isolation channels. See the Pin Configurations and Function Descriptions in the data sheet for additional information.

APPLICATIONS

* RS-232 transceivers

* Power supply start-up bias and gate drives

* Isolated sensor interfaces

* Automotive on-board charger (OBC) and dc to dc

* Industrial programmable logic controllers (PLCs)

1 Protected by U.S. Patents 5,952,849; 6,873,065; 6,903,578; and 7,075,329. Other patents are pending.

* isoPower integrated, isolated dc-to-dc converter

* 100 mA output supply

* AEC-Q100 qualified for automotive applications

* ADuM6421AW

* Meets CISPR 32/EN55032 Class B emission limits up to 5 Mbps at a full load on a 2-layer PCB

* Quad dc to 100 Mbps signal isolation channels

* 28-lead, fine pitch, SOIC with 8.3 mm minimum creepage

* High temperature operation: 125°C maximum

* High common-mode transient immunity: 100 kV/μs