PIC16F616T-I/SL View Datasheet(PDF) - Microchip Technology

Part Name

Description

Manufacturer

PIC16F616T-I/SL

14-Pin, Flash-Based 8-Bit CMOS Microcontrollers

Microchip Technology 

PIC16F610/616/16HV610/616

8.9 Comparator Hysteresis

Each comparator has built-in hysteresis that is user

enabled by setting the C1HYS or C2HYS bits of the

CM2CON1 register. The hysteresis feature can help

filter noise and reduce multiple comparator output

transitions when the output is changing state.

FIGURE 8-7:

COMPARATOR HYSTERESIS

Figure 8-9 shows the relationship between the analog

input levels and digital output of a comparator with and

without hysteresis. The output of the comparator

changes from a low state to a high state only when the

analog voltage at VIN+ rises above the upper

hysteresis threshold (VH+). The output of the

comparator changes from a high state to a low state

only when the analog voltage at VIN+ falls below the

lower hysteresis threshold (VH-).

VIN+

+

VIN-

–

Output

V+

VH+

VIN-

VH-

VIN+

Output

(Without Hysteresis)

Output

(With Hysteresis)

Note: The black areas of the comparator output represents the uncertainty due to input offsets and response time.

DS41288F-page 66

© 2009 Microchip Technology Inc.

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