46.20 Peripheral Touch Controller (PTC) Electrical Specifications

Table 46-26. Peripheral Touch Controller Module Electrical Specifications
DC CHARACTERISTICS				Standard Operating Conditions: VDD and VDDIO 2.7V to 5.5V (unless otherwise stated) Operating temperature: -40°C ≤ T_A≤ +85°C for Industrial
Param. No.	Symbol	Characteristics		Min.	Typ.	Max.	Units	Conditions
PTC_1a	C_LOAD SC⁽¹⁾	Self Capacitance Mode (PTC Channel Y0 - Y27)		—	—	14	pF	Maximum sensor load capacitance
PTC_1b	C_LOAD SC⁽¹⁾	Self Capacitance Mode (PTC Channel Y1 - 23, Y28 - 31)		—	—	20	pF
PTC_1c	C_LOAD SC⁽¹⁾	Self Capacitance Mode (PTC Channel Y24 - Y26)		—	—	17	pF
PTC_3	C_LOAD MC⁽¹⁾	Mutual Capacitance Mode (PTC Channel Y0 - Y31)		—	—	31	pF
PTC ANALOG GAIN SETTINGS ⁽²⁾
PTC_5	PTC_GAIN	Analog Gain Settings	Gain_1	—	1	—	—	—
			Gain_2	—	2.1	—
			Gain_4	—	4.3	—
			Gain_8	—	9.9	—

Note:

Maximum capacitive load that the PTC circuitry can compensate for each channel.
Analog Gain is a parameter of the Touch Library. Refer to the "Touch Library Peripheral Touch Controller User Guide".
If larger sensor base capacitance is required, the Microchip support team will guide to resolve by applying external compensation.
To further increase SNR and to speed up touch acquisition for mutual touch sensing, use boost mode from MPLAB Code Configurator (MCC).