Industrial analog I/O modules are used to transmit and receive precise, low-level voltage and current signals to and from sensors and actuators situated on the factory floor. Like all electronic devices, repeated use and changing environmental conditions over extended time periods cause their performance to deteriorate, meaning periodic calibration is necessary to ensure that they continue operating to a predetermined standard.
In this design solution, we review the features and specifications of typical examples of such calibration equipment. We then consider the features of a new reference design based on a software configurable analog (SWIO) IC that potentially sets the benchmark for a new generation of ultra-portable, lightweight calibrators that still provide the functionality and performance of incumbent offerings.