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User Module Datasheet: CapSense® Sigma-Delta Datasheet CSD V 1.90 (CY8C20xx7/S, CY8C20055) | Cypress Semiconductor

User Module Datasheet: CapSense® Sigma-Delta Datasheet CSD V 1.90 (CY8C20xx7/S, CY8C20055)

Last Updated: 
Dec 17, 2014
Version: 
1.90

Features and Overview

  • Immune to GPIO current transient, Vdd fluctuation, entry and exit from sleep, and IDAC RTS noise.
  • Implements CapSense® capacitive sensing using sigma-delta data conversion.
  • Configurable system parameters allow tuning to optimize performance in a broad range of applications.
  • Supports up to 35 capacitive sensors or 6 sliders.
  • Capable of detecting touches as low as 0.1 pF, that is, detecting a finger is possible through up to 15 mm of glass or 5mm of plastic.
  • Supports capacitive sensors configured as independent buttons and/or as dependent arrays to form sliders.
  • Effective number of slider elements can double the number of dedicated I/O pins using diplexing technique.
  • For more, see pdf.
     

The Capacitive Sensing using a Sigma Delta Modulator (CSD) User Module is based on the differential capacitive sensing method. This user module uses the Analog MUX Bus for connecting a capacitive sensing analog circuitry to any PSoC pin.

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