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Sensor Signal Conditioner to Linearize Results

Overview

In scales, the used sensor elements are non-linear, therefore, linearization needs to be done. In this design, the workload is done in a sensor signal conditioner to allow close to 100% use of the MCU for customer applications.

System Benefits​:

  • No load for the MCU, as all the pre-processing is done by the signal conditioner
  • Tiny software footprint on the MCU side for precise scale functionality
  • Offloading the MCU offers full MCU capability for user applications (e.g. human machine interface (HMI), Tare function, etc.)
  • The IO-Link PHY powers the entire application
  • Easy adoption of a seven-segment LED via the GreenPAK™ family of cost-effective NVM programmable devices
  • Reduced BOM, smaller PCB

Block Diagram

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Template 1Connector Line.471Diode - LEDSheet.482Sheet.483Sheet.484Sheet.485Sheet.486Darlington.651Sheet.488Darlington.254GroundSheet.491Sheet.492PowerPowerPowerConnector Line.494Diode - LED.495Sheet.496Sheet.497Sheet.498Sheet.499Sheet.500Darlington.651Sheet.502Darlington.254Ground.504Sheet.505Sheet.506E0CE0CE0CConnector LineConnector Line.442Connector Line.444Connector Line.445ResistorResistor.99Resistor.100Resistor.101Sheet.434Sheet.435Sheet.436Sheet.437Sheet.438Sheet.439Sheet.440Connector Line.447Connector 1.160.448Connector 1.160.450Connector 1.160.451Connector 1.160.452Connector ArrowEU102EU102EU102Bi-directionalPower CtrlPower CtrlPower Ctrl I2CI2CI2CVertical Wire Bundle222Sheet.385GreenPAKGreenPAKGreenPAKConnector Arrow.387Connector 1.160Connector Arrow.389Connector Arrow.391Connector 1.160.3923.3V3.3V3.3V25mA max.25mA max.25mA max.Vertical Wire Bundle.425111111Sheet.4273.3 V3.3V3.3VINNINNINNVSSBVSSBVSSBINPINPINPVSSBVSSBVSSBLoad SensorLoad SensorLoad SensorProgramProgramProgramDebug E1 I/FDebug E1 I/FDebug E1 I/FBi-directional.463Vertical Wire Bundle.464444Sheet.466Bi-directional.509Horizontal Wire BundleCommunication Lines B.795444Bi-directional.519Vertical Wire Bundle.520444Sheet.522Bi-directional.523Bi-directional.524Vertical Wire Bundle.525 333Sheet.527Vertical Wire Bundle.528444Sheet.530SPISPISPIAUXAUXAUXCTRLCTRLCTRLBi-directional.535Vertical Wire Bundle.536444Sheet.538IO-LinkIO-LinkIO-Link410mA max.410mA max.410mA max.Connector Line.541Diode - LED.542Sheet.543Sheet.544Sheet.545Sheet.546Sheet.547Darlington.651Sheet.549Darlington.254Ground.551Sheet.552Sheet.553MCU PowerMCU PowerMCU PowerSheet.555Sensor Signal ConditionerSensor Signal ConditionerSensor SignalConditionerI2CI2CI2CSheet.556MCUMCUMCUI2CI2CI2CGPIOGPIOGPIOVDDVDDVDDTool0 Reset SupplyTool0 Reset SupplyTool0ResetSupplySPISPISPIUARTUARTUARTGPIOGPIOGPIOSheet.557IO-Link PHY with DC/DCIO-Link PHY with DC/DCIO-Link PHY with DC/DCSPISPISPI AUXAUXAUXCTRLCTRLCTRL3.3V Supply3.3V Supply3.3V SupplyDisplaySheet.559Sheet.598Sheet.560Sheet.561Sheet.562Sheet.563Sheet.564Sheet.565Sheet.566Sheet.567Sheet.568Sheet.569Sheet.570Sheet.571Sheet.572Sheet.573Sheet.574Sheet.575Sheet.576Sheet.577Sheet.578Sheet.579Sheet.580Sheet.581Sheet.582Sheet.583Sheet.584Sheet.585Sheet.586Sheet.587Connector Arrow.600

GreenPAK

GreenPAK with Asynchronous State Machine

Sensor Signal Conditioner

Sensor Signal Conditioners (SSC/AFE)

MCU

RA Arm Cortex-M MCUs
RL78 Low-Power 8 & 16-Bit MCUs

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