Microchip Technology DV102012 Data Sheet
2011 Microchip Technology Inc.
DS41606B-page 11
AR1100 RESISTIVE USB AND RS-232 TOUCH SCREEN CONTROLLER
3.4
ESD Considerations
Suggested ESD protection is shown on the reference
schematic (See
schematic (See
).
Additional/alternate ESD countermeasures may be
employed to meet application-specific requirements.
Test to ensure the selected ESD protection does not
degrade touch performance.
employed to meet application-specific requirements.
Test to ensure the selected ESD protection does not
degrade touch performance.
3.5
Noise Considerations
Touch sensor filtering capacitors are included in the
reference design schematic (See
reference design schematic (See
).
Note:
ESD protection diodes are recommended
for all active sensor lines but care should
be taken to minimize capacitance. As an
example, PESD5V0S1BA is
recommended and used on reference
designs due to its nominally-low 35 pF.
for all active sensor lines but care should
be taken to minimize capacitance. As an
example, PESD5V0S1BA is
recommended and used on reference
designs due to its nominally-low 35 pF.
Note:
Changing the value of the sensor filter
capacitors may adversely affect touch
performance.
capacitors may adversely affect touch
performance.