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Figure 6. Communication with the industrial network is performed by the IO-Link host transceiver on the controller side. 6 47 Engineering a More Sustainable Future | ADI In IO-Link applications, a transceiver acts as the physical layer interface to a microcontroller running the data-link layer protocol. The advantage of using IO-Link is that it carries four different types of transmissions: process data, diagnostics, configuration, and events, allowing sensors to be quickly identified, traced, and attended to if a malfunction occurs. It also enables remote configuration—for example, if the temperature threshold for a process alarm to be triggered requires changing, this can be done remotely without needing a technician to step onto the factory floor. The MAX14828 is an example of a low power, ultrasmall IO-Link device transceiver. It is available in a ( 4 mm × 4 mm ) 24- lead TQFN package and a ( 2.5 mm × 2.5 mm ) wafer-level package ( WLP ) , allowing it to be easily integrated into an industrial RTD- based temperature ( and other types of ) sensor. The transceiver enables a sensor independent of the industrial network because it communicates directly with an IO-Link host installed at the process controller side, which manages communication with the interface ASIC as shown in Figure 6. Conclusion Smart factory automation engineers have growing expectations of industrial temperature sensors, including smaller size, flexible communications, and remote configurability. This article showed MAX14828 IO-Link Device Transceiver LEARN MORE how RTD temperature sensors could be quickly redesigned with a highly integrated AFE to reduce the enclosure size. It also showed how an IO-Link device transceiver allows the sensor to operate independently of the industrial network interface used to connect to a process controller. While this article focuses on RTD-based temperature sensors, this redesign can also be applied to temperature sensors that use thermistors or thermocouple transducers. About the Authors Brian Condell is a product applications engineer working on IO- Link within Industrial Connectivity and Control at Analog Devices based in Limerick, Ireland. Brian started working in ADI in 1997. He graduated from the University of Limerick in 2003 with an honors degree in electrical engineering. He has over 25 years of experience across the semiconductor industry within various roles from FAB maintenance technician, IC layout, analog design, functional safety, and more recently, applications. Michael Jackson is the end market specialist for automation in the Global Applications Team at Analog Devices. He holds a master's degree in electronic engineering. Adobe Stock / WilliamJu – stock.adobe.com Adobe Stock / Sweet – stock.adobe.com