MTCH102 Datasheet, PDF (8/37 Pages) Microchip Technology – 2, 5 and 8-Channel Proximity/Touch Controller Data Sheet

MTCH102/5/8
2.0 TYPICAL CIRCUIT
The MTCH102 is used as an example to show two
typical circuits for MTCH10X devices in the following
figures. For more information about capacitive sensor
layout guidance, refer to “Techniques for Robust Touch
Sensing Design” (AN1334).
FIGURE 2-1:
TWO SENSORS AND NO ACTIVE GUARD CIRCUIT
Sensor
Sensor
R1
4.7K
R2
4.7K
VDD
C1
VDD
U1
1
VDD
2 _MTI0
0.1uF
8
VSS
MTO0 ⁷
GND
R6 R7
10K 10K
MTO0
3 _{MTI1/Guard MTO1/GC} 6
4 _MTPM
MTSA ⁵
R3
VDD
MTO1
07&+
MTPM
10K
R4
R5
FIGURE 2-2:
Sensor
Active Guard
GND
ONE SENSOR WITH ACTIVE GUARD CIRCUIT
R1
4.7K
R2
0
VDD
C1
U1
1
VDD
2 _MTI0
0.1uF
VSS
8
MTO0 ⁷
3 _{MTI1/Guard MTO1/GC} 6
4 _MTPM
MTSA ⁵
07&+
MTPM
VDD
R6
GND
10K
MTO0
R3
VDD
10K
GND
R4
R5
GND
DS40001793C-page 8
Preliminary
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