8.1 Example Circuit - Capacitive

Figure 8-1. MTCH9010 Example Circuit - Capacitive Operation Mode

The schematic above presents an example circuit for the following scenario: Capacitive Operation mode, Sleep configured for Wake-up on request, System Lock disabled, Extended Output mode enabled.

  • OP_MODE pin is connected to VDD, configuring the operation mode to Capacitive
  • SLP_PER pin is connected to GND on a ten-level voltage divider, enabling the Wake-up on request feature. The host must use a signal on the WU pin to trigger acquisitions.
  • The THR pin is connected to a potentiometer, where the Liquid Detection threshold is configured
  • The CFG_EN pin is connected to VDD, which disables the Enhanced Configuration mode
  • The SYS_LK pin is connected to VDD, which disables the System Lock feature
  • The UART_EN pin is connected to GND, enabling the Extended Output mode