55.23 PTC Electrical Specifications

Table 55-31. Peripheral Touch Controller Electrical Specifications (3)
AC CHARACTERISTICS Standard Operating Conditions: VDD = AVDD = 1.71V to 3.63V (unless otherwise stated)

Operating temperature:

-40°C ≤ TA ≤ +85°C for Industrial Temperature
Param. No. Symbol Characteristics Min. Typ. Max. Units Conditions
PTC_1 CLOAD SC (1) Self Capacitance Mode (PTC Channel Y0 - Y31) — — 51 pF User maximum sensor external load capacitance
PTC_3 CLOAD MC (1) Mutual Capacitance Mode (PTC Channel Y0 - Y31) — — 31 pF
PTC ANALOG GAIN SETTINGS (2)
PTC_5 PTCGAIN Analog Gain Settings Gain_1 — 1 — — —
Gain_2 — 2 —
Gain_4 — 4.2 —
Gain_8 — 9.1 —
Note:
  1. Maximum capacitive load that the PTC circuitry can compensate for each channel.
  2. Analog Gain is a parameter of the Touch Library. Refer to the Touch Library Peripheral Touch Controller User Guide on the Microchip website.
  3. AVDD = 3.3V, DFLL48M as main clock source, running undivided at 48 MHz.

    CPU is running on Flash with 2 wait states, at 48 MHz.

    PTC running at 4 MHz.

    Mutual-Capacitance mode.

    One touch channel.

    Standby Sleep mode enabled.

    RTC running on ULP32K: used to define the PTC scan rate, through the event system.

    RTC interrupts (wake up) the CPU to perform PTC scans.