ADCMP371_15 datasheet(10/12 Pages) AD

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ADCMP370/ADCMP371

Data Sheet

The hysteresis is the difference between these voltage levels and

is given by

)

(

)

(

)

(

∆

OUT

VCC = 5V

ADCMP371

IN+

IN–

VOUT

VIN

VIN_LO

= 1.67V

VIN_HI

= 3.33V

VCC

VIN_HI

VIN_LO

RLOAD

R2 = 1M

Ω

R3 = 1M

Ω

R1 = 1M

Ω

VIN

VOUT HIGH:

VOUT LOW:

Figure 20. Inverting ADCMP371 Comparator Configuration with Hysteresis

For the ADCMP370 configuration, a pull-up resistor is required

for the open-drain output, which affects the hysteresis calcula-

tion. The noninverting ADCMP370 configuration is shown in

Figure 21. The upper switching threshold is

(

)

R1+

= REF

IN_HI

The lower input threshold level is given by

(

)

PULLUP

−

= REF

IN_LO

The hysteresis is the difference between these voltage levels

PULLUP

∆

ADCMP370

IN+

IN–

OUT

VIN

VREF = 2.5V

VCC = 5V

RPULLUP

RLOAD

Figure 21. Noninverting ADCMP370 Comparator Configuration with

Hysteresis

The inverting ADCMP370 configuration is shown in Figure 22.

The upper and lower switching thresholds are

(

) R2

PULLUP

IN_HI

)

(

)

))

(

)

(

))

(

)

(

PULLUP

IN_HI

(

)

(

))

(

)

(

PULLUP

IN_LO

))

(

)

(

))

(

)

(

PULLUP

IN_LO

assuming RLOAD >> R1, R2, R3, RPULLUP.

The hysteresis is the difference between these voltage levels and

is given by

))

(

)

(

))

(

PULLUP

∆

ADCMP370

IN+

IN–

OUT

VIN

VCC = 5V

RPULLUP

RLOAD

Figure 22. Inverting ADCMP370 Comparator Configuration with Hysteresis

Rev. D | Page 10 of 12

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