In loop-powered applications, where one of the key criteria is that “every microamp counts”, it is no wonder that ADI’s recently released AD5700 HART Modem IC has attracted a lot of attention. This product is the industry’s lowest power, complete HART Modem, offering 38% lower power & 75% potential board space savings than competition products.
In this article, I discuss the reasons behind such requirements and the diversity of applications in today’s ever-expanding industrial environment that are employing HART communication technology. As well as reviewing the AD5700/AD5700-1 products, I also introduce the HART enabled smart transmitter reference demo. This demo was developed by ADI and utilizes the AD5421, a 16-bit loop powered, 4 to 20mA DAC, the ADuCM360 microcontroller and the AD5700 HART modem. This circuit has been compliance tested, verified and registered as an approved HART solution by the HART Communication Foundation.
You can read the entire article entitled HART Communication Networks are Improved by Small, Flexible, Low-Power Modem ICs in the October 2012 issue of Analog Dialogue.
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