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User Module Datasheet: CapSense® Sigma-Delta Datasheet CSD V 1.90 (CY8C28x45, CY8C28x52, CY8C28x13, CY8C28x33, CY8CLED04) | Cypress Semiconductor

User Module Datasheet: CapSense® Sigma-Delta Datasheet CSD V 1.90 (CY8C28x45, CY8C28x52, CY8C28x13, CY8C28x33, CY8CLED04)

Last Updated: 
Jul 03, 2013
Version: 
1.90
Features and Overview
  • Scan up to 41 capacitive sensors (depending on the device pin count).
  • Sensing is possible with up to a 15 mm glass overlay.
  • Proximity detection to 20 cm with a wire-based sensor.
  • High immunity to AC mains noise, EMC noise, and power supply voltage changes.
  • Supports different combinations of independent and slide capacitive sensors.
  • Double slide sensor physical resolution using diplexing.
  • Increase slide sensor resolution using interpolation.
  • Touchpad support with two slide sensors.
  • Sensing support through high resistive conductive materials (indium tin oxide (ITO) films for example).
  • Shield electrode support for reliable operation in the presence of water film or droplets.
  • Guided sensor and pin assignments using the CSD Wizard.
  • Integrated baseline update algorithm for handling temperature, humidity, and electrostatic discharge (ESD) events.
  • Easily adjustable operational parameters.
  • PC GUI application support for raw data monitoring and parameter optimization in real time.
     
The Capacitive Sensing using a Sigma-Delta Modulator (CSD) User Module provides capacitance sensing using the switched capacitor technique with a sigma-delta modulator to convert the sensing switched capacitor current to digital code. The CSD User Module can support single-channel CapSense scanning with a First and Second order Sigma Delta Modulator.
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