PIC16LF18854 Datasheet, PDF (348/668 Pages) Microchip Technology – C Compiler Optimized RISC Architecture

PIC16(L)F18856/76
23.4 Capacitive Voltage Divider (CVD)
Features
The ADC module contains several features that allow
the user to perform a relative capacitance
measurement on any ADC channel using the internal
ADC sample and hold capacitance as a reference. This
relative capacitance measurement can be used to
implement capacitive touch or proximity sensing
applications. Figure 23-6 shows the basic block
diagram of the CVD portion of the ADC module.
FIGURE 23-6:
HARDWARE CAPACITIVE VOLTAGE DIVIDER BLOCK DIAGRAM
VDD
ANx
ANx Pads
ADPPOL = 1
ADC Conversion Bus
ADPPOL = 0
VGND
Additional
Sample and
Hold Cap
VGND
VGND
VGND
ADCAP<2:0>
DS40001824A-page 348
Preliminary
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