Single-package Quad-Channel Data/Power isolators

Single-package Quad-Channel Data/Power isolators for Medical-Grade applications

Analog Devices has expanded its broad portfolio of digital isolation products with the addition of a family of quad-channel isolators that meet stringent specifications for data and power isolation in patient monitoring devices and other medical equipment.

Each of the five devices in the ADuM640x quad-channel isolator family integrates ADI’s iCoupler® digital isolation and isoPower® dc-to-dc conversion technologies, providing both isolated power and isolated signal channels within a single package and reducing board space by as much as 50 percent.

ADuM640x quad-channel isolators offer 5-kV rms medical-grade isolation (IEC 60601-1 approvals pending) and four independent isolation channels in various channel configurations and data rates. The onboard isoPower isolated dc-to-dc converter provides up to 500 mW of regulated, isolated power and can operate at either 5.0 V or 3.3 V. This eliminates the need for a separate, isolated dc-to-dc converter in low-power, isolated designs. The ADuM640x family also includes a thermal shutdown feature to ensure safe operation. The ADuM640x family of quad-channel isolation products is summarised in the following table. For full details please visit http://www.analog.com/pr/ADuM640x.

iCoupler® Technology
With more than 250 million channels deployed, ADI’s proven iCoupler technology is based on chip-scale transformers, rather than on the LEDs and photodiodes found in optocouplers. Transformers support higher data rates, consume less power, and are more stable over life as compared to LEDs and photodiodes. By fabricating the transformers directly on-chip using wafer-level processing, iCoupler channels can be integrated with each other and other semiconductor functions at low cost. iCoupler transformers are planar structures formed from CMOS and gold metal layers. A high breakdown polyimide layer underneath the gold layer insulates the top transformer coil from the bottom. CMOS circuits connected to the top coil and bottom coil provide the interface between each transformer and its external signals.

isoPower DC-to-DC Converter
iCoupler digital isolators condition and drive data across transformers. ADI’s isoPower dc-to-dc converter uses the same chip-scale transformer technology, but instead of transmitting data, isoPower employs switches, rectifiers, and regulators to generate power that is isolated to the same degree as the data channels.

Enhanced system-level ESD (electrostatic discharge) protection.
ADI has also announced the release of a family of quad-channel digital isolators that feature enhanced system-level ESD (electrostatic discharge) protection for medical equipment applications. The ADuM440x family comprises three digital isolation products with 5-kV rms medical-grade isolation (IEC 60601-1 approvals pending) that differ only by channel configuration.

For further details of the ADuM440x range of products, please use the “more information” link below.