Understanding Smart Sensors - Nomads.usp

Glossary 355end point straight line fit the maximum deviation of any data point on asensor output curve from a straight line drawn between the end data points onthe output curveenginethe computational portion of an ICepitaxial or epi a single-crystal semiconductor layer grown on a singlecrystalsubstrate and having the same crystallographic characteristics as the substratematerialerror the algebraic difference between the indicated value and the true valueof the input; usually expressed in percentage of full-scale span and sometimes inpercentage of the sensor output readingerror band the band of maximum deviations of the output values from aspecified reference line or curve due to those causes attributable to the sensor.Usually expressed as a positive percentage of full-scale output. The error bandshould be specified as applicable over at least two calibration cycles, so as toinclude repeatability, and verified accordingly.etch stop a layer of P-type material that etches at a much slower rate thanN-type materialEthernetoperationlocal area network software standard that determines systemexcitation voltage (current) the external electrical voltage and/or currentapplied to a sensor for its proper operation (often referred to as the supply circuitor voltage). See supply voltage (current)feedforwarda method to precompensate a control loop for known errorsferroelectric effect the tendency of dipoles within a crystal to align in thepresence of an electric field and to remain polarized after the field is removedfieldbus a two-way communications link among intelligent field devicesand control systems devicesfiltera circuit that reduces noise and other unwanted elements of a signalfirmware computer program or instructions stored in ROM instead of inthe softwareflash semiconductor memory that can be used for permanent storage andthat is easily electrically reprogrammed in the system; faster than EEPROM