Intrinsically-safe digital isolator is pre-certified

February 21, 2017 // By Graham Prophet
Analog Devices' AduM144x is claimed as the only-available, certified intrinsically safe (IS) digital isolator, based on IEC 60079-11:2011 standards. The 4-channel digital isolators use ADI's iCoupler technology and are intended for electrical equipment for use in hazardous areas.

When compared to traditional optocouplers, ADI’s IS-IS certified digital isolators simplify circuits by reducing required PCB board space along with component cost and design complexity as multiple diodes and resistors are no longer needed. These IS-IS digital isolators also provide higher data rates for more efficient operation and reduce installation cost over other protection methods. The isolators are ultra-low power, limiting the amount of energy that has to be isolated in hazardous areas. The devices are available in 16-lead QSOP (2.5 kV) and 20-lead SSOP (3.75 kV) packages.

The ADuM144x micropower 4-channel digital isolators are based on iCoupler technology, to enable designers to implement isolation in designs without the cost, size, power, performance, and eliability constraints found with optocouplers. They combine high speed CMOS and monolithic air core transformer technologies. Operating with supplies as low as 2.25V, the digital isolators are ideally suited for applications such as industrial field instruments. The new devices received intrinsically safe certifications from CSA-Sira and IECEx, global providers of testing and certification services. They are priced from $1.98 (1000).


Analog Devices;