48.20 Peripheral Touch Controller (PTC) Electrical Specifications

Table 48-29. Peripheral QTouch Controller (PTC) AC Electrical Specifications
AC CHARACTERISTICSStandard Operating Conditions: VDDIO = AVDD 1.75V to 3.63V, VDDREG = 1.75V to 1.85V (unless otherwise stated)

Operating temperature:

-40°C ≤ TA ≤ +85°C for Industrial

Param. No.SymbolCharacteristicsMin.TypicalMax.UnitsConditions
PTC_1CLOAD SC (1)Self Capacitance Mode (PTC Channel Y0 - Y31)——75pFMaximum sensor load capacitance (1)
PTC_3CLOAD MC (1)Mutual Capacitance Mode (PTC Channel Y0 - Y31)——35pF
PTC_4AfPTC (2)PTC Frequency——4MHz
PTC_4BTwarmWarm-up time——500 PTC clock cyclesµs
Note:
  1. Maximum capacitive load that the PTC circuitry can compensate for each channel.
  2. fPTC = GCLK_PTC / PTC prescaler.