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Kitchen range hood with 2D touch sensor

Touchless control of kitchen appliances

This design demonstrates a kitchen range hood that utilizes Renesas’ capacitive touch sensing technology (CTSU) for touchless control. The RA2 MCU series provides a complete solution in a single chip thanks to the integrated 16-bit SAR ADC, 24-bit sigma-delta ADC, touch control, and lower power performance. Additionally, the combination of high performance power and analog systems from Renesas’ LDOs, op amps and triacs can be utilized in other home appliances (washing machines, IH cooking heaters) that require touch panel functionality.

System benefits:

  • Built-in high-touch sensitivity CTSU to support touch key and 2D gesture input. Improved noise immunity, sensitivity and water resistance is an ideal match for consumer electronics products that are used in wet environments, such as the kitchen or bathroom.
  • High-performance LDO, op amps and triacs provide a full solution
kitchen range hood

Recommended products

Products Description Documents
Microcontroller    
RA2A1 48MHz Arm® Cortex®-M23 core with integration of a 24-bit sigma-delta ADC Datasheet
Op Amp    
ISL28130 Single micropower, low drift, RRIO operational amplifier Datasheet
Triac    
BCR8LM-12LA Guaranteed junction temperature (Tj) of 150 °C and are provided in a variety of packages, ideal for white goods and home appliances Datasheet
LDO    
ISL9007 High current LDO with low IQ and high PSRR Datasheet

 

System block diagram

block diagram
 

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