Universal input reference design

23 March 2016 Design Automation

Industrial automation engineers can achieve highly accurate measurements for their system designs with the MAXREFDES67# analog front end (AFE) universal input Micro PLC reference design from Maxim Integrated Products. To meet Industry 4.0 requirements, Maxim partnered with Wurth Electronics Midcom to customise a power isolation transformer that is energy efficient and compact enough to fit in this credit card sized Micro PLC form factor.

As high-resolution systems move to higher bit counts, they become more sensitive to noise, making such systems difficult to build and maintain accuracy. MAXREFDES67# is a 24-bit AFE reference design that overcomes this challenge. Capable of accepting four different signals (voltage, current, RTD and thermocouple), its universal analog input requires no jumpers and is 100% software configurable.

The board boasts effective resolution up to 22,3 bits with temperature error as low as ±0,1% across a range of -40°C to 150°C. Hardware and firmware design files, as well as test data, are provided free and are available online.

For more information contact Christo Keyser, Avnet South Africa, +27 (0)11 319 8600, [email protected], www.avnet.co.za

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