PIC16LF18854 Datasheet, PDF (273/668 Pages) Microchip Technology – C Compiler Optimized RISC Architecture

PIC16(L)F18856/76
18.0 COMPARATOR MODULE
Comparators are used to interface analog circuits to a
digital circuit by comparing two analog voltages and
providing a digital indication of their relative magnitudes.
Comparators are very useful mixed signal building
blocks because they provide analog functionality
independent of program execution. The analog
comparator module includes the following features:
• Programmable input selection
• Programmable output polarity
• Rising/falling output edge interrupts
• Wake-up from Sleep
• Programmable Speed/Power optimization
• CWG1 Auto-shutdown source
• Selectable voltage reference
18.1 Comparator Overview
A single comparator is shown in Figure 18-1 along with
the relationship between the analog input levels and
the digital output. When the analog voltage at VIN+ is
less than the analog voltage at VIN-, the output of the
comparator is a digital low level. When the analog
voltage at VIN+ is greater than the analog voltage at
VIN-, the output of the comparator is a digital high level.
The comparators available are shown in Table 18-1.
TABLE 18-1: AVAILABLE COMPARATORS
Device
C1 C2 C3 C4 C5
PIC16(L)F18856/76 ● ● ● ● ●
FIGURE 18-1:
VIN+
VIN-
SINGLE COMPARATOR
+
Output
–
VIN-
VIN+
Output
Note:
The black areas of the output of the
comparator represents the uncertainty
due to input offsets and response time.
 2016 Microchip Technology Inc.
Preliminary
DS40001824A-page 273