35.18 PTC

Table 35-26. Peripheral Touch Controller Specifications
Symbol	Description	Min.	Typ.✝	Max.	Unit	Conditions
V_DD	Supply voltage	1.62	—	5.5	V
C_LOAD ^*	Maximum Load, Mutual Capacitance mode	—	—	27	pF	Without external compensation capacitor
	Maximum Load, Self-Capacitance mode (Y1)	—	—	25	pF
	Maximum Load, Self-Capacitance mode (Y0, Y17, Y18)	—	—	40	pF
	Maximum Load, Self-Capacitance mode (Other PTC pins)	—	—	50	pF
C_LOAD^*	Maximum Load, Mutual Capacitance mode	—	—	C_{EXT_CC}	nF	With external compensation capacitor
C_LOAD^*	Maximum Load, Self-Capacitance mode	—	—	C_{EXT_CC}	nF	With external compensation capacitor
C_{EXT_IC}⁽¹⁾^*	Size of External Integration Capacitor	—	—	10	nF
C_{EXT_CC}⁽¹⁾^*	Size of External Compensation Capacitor	—	—	1	nF
C_SH^*	Driven shield capacitive drive	—	—	1	nF	Per driven shield pin
CLK_ADC	Supported ADC Clock frequency	300	—	2000	kHz
CLK_PTC	PTC Clock frequency	—	—	f_{CLK_PER}	MHz
EXT_R_S_Y ^*	External Series Resistor (Y-line)	0	10	100	KΩ	For EMC, Self-Capacitance mode
EXT_R_S_X ^*	External Series Resistor (X-line)	0	1	10	KΩ	For EMC, Mutual Capacitance mode
✝ Data in the “Typ.” column is measured at T_A = 25°C and V_DD = 3.0V unless otherwise specified. These parameters are not tested and are for design guidance only. * These Parameters are characterized but not tested in production. Note: Refer to the PTC library documentation for sizing.