11

www.3peakic.com.cn

REV1.2

TP2011/TP2012/TP2014

Ultra-Low Power 200nA, 1.6V, RRIO, Push-Pull Output Comparators

0

Hysteresis

Band

Time

Non-Inverting Comparator Output

2

0

Inverting Comparator Output

Hysteresis

Band

Time

2

Figure 3. Comparator’s hysteresis and offset

External Hysteresis

Greater flexibility in selecting hysteresis is achieved by using external resistors. Hysteresis reduces output chattering

when one input is slowly moving past the other. It also helps in systems where it is best not to cycle between high and

low states too frequently (e.g., air conditioner thermostatic control). Output chatter also increases the dynamic supply

current.

Non-Inverting Comparator with Hysteresis

A non-inverting comparator with hysteresis requires a two-resistor network, as shown in Figure 4 and a voltage

Figure 4. Non-Inverting Configuration with Hysteresis

tr

V

R2

R1

R2

r

V





tf

V

2

1

1

)

tf

V

DD

(V

r

V









R

R

R

r

V

R2

2

1

tr

V

R

R 



DD

V

R2

1

r

V

R2

2

1

tf

V

R

R

R







DD

V

R2

1

tf

V

tr

V

hyst

V

R





