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PSoC 4 Capacitive Sensing (CapSense®) ADC | Cypress Semiconductor

PSoC 4 Capacitive Sensing (CapSense®) ADC

Last Updated: 
Jul 08, 2020
Features Symbol Diagram
  • Offers best-in-class signal-to-noise ratio (SNR)
  • Supports Self-Capacitance (CSD) and Mutual-Capacitance (CSX) sensing methods
  • Features SmartSense™ auto-tuning technology for CSD sensing to avoid complex manual tuning process
  • Supports various Widgets, such as Buttons, Matrix Buttons, Sliders, Touchpads, and Proximity Sensors
  • Provides ultra-low power consumption and liquid tolerant capacitive sensing technology
  • Contains integrated graphical tuner for manual tuning, testing, and debugging
  • Supports ADC function with:
    • Selectable 8- or 10-bit resolution
    • Sample rates of up to 11.6 ksps with 10-bit resolution
    • Input measurement range from VSSA to VDDA on any GPIO pin


This component supports all CapSense-enabled devices in the PSoC 4 family of devices, including: Fourth generation CapSense: PSoC 4000S, PSoC 4100S, and PSoC Analog Coprocessor.

However, some features are restricted in specific devices:

  • The Export Register Map feature will be available in the next component version.
  • The CSD2x functionality will be available in the next version of the component.
  • The CapSense Tuner does not support ADC functionality. This feature will be added in a future component version.
  • The IDAC sensing configuration feature will be available in the next component version.

Note The CapSense ADC v3.0 component (and any version that follows) is not backward compatible with CapSense_CSD_P4 v2.40 or older. If you wish to migrate your design to the new CapSense P4 v3.0 component, refer to the “Migration Guide” section in the datasheet for details on how to manually transition the design.

General Description

CapSense is a Cypress capacitive sensing solution. It supports multiple widgets (group of sensors used to form an interface) using both CSX and CSD sensing methods.

The CapSense ADC component solution includes a configuration wizard to create and configure CapSense Widgets, APIs to control the component from application firmware, and a CapSense Tuner application for tuning, testing, and debugging.