ADT7310 datasheet(21/24 Pages) AD

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ADT7310

Rev. 0 | Page 21 of 24

INT AND CT OUTPUTS

The INT and CT pins are open drain outputs, and both pins

require a 10 kΩ pull-up resistor to VDD.

UNDERTEMPERATURE AND OVERTEMPERATURE

DETECTION

The INT and CT pins have two undertemperature/over-

temperature modes: comparator mode and interrupt mode.

The interrupt mode is the default power-up overtemperature

mode. The INT output pin becomes active when the tempera-

ture is greater than the temperature stored in the THIGH setpoint

overtemperature mode selected.

Figure 22 illustrates the comparator and interrupt modes for

events exceeding the THIGH limit with both pin polarity settings.

Figure 23 illustrates the comparator and interrupt modes for

events exceeding the TLOW limit with both pin polarity settings.

Comparator Mode

In comparator mode, the INT pin returns to its inactive status

when the temperature drops below the THIGH − THYST limit or

rises above the TLOW + THYST limit.

Putting the ADT7310 into shutdown mode does not reset the

INT state in comparator mode.

Interrupt Mode

In interrupt mode, the INT pin goes inactive when any ADT7310

only when the temperature is greater than the temperature

stored in the THIGH setpoint register or less than the temperature

stored in the TLOW setpoint register.

Placing the ADT7310 into shutdown mode resets the INT pin

in the interrupt mode.

TEMPERATURE

82°C

81°C

80°C

79°C

78°C

77°C

76°C

75°C

74°C

73°C

INT PIN

(COMPARATOR MODE)

POLARITY = ACTIVE LOW

INT PIN

(INTERRUPT MODE)

POLARITY = ACTIVE LOW

INT PIN

(INTERRUPT MODE)

POLARITY = ACTIVE HIGH

INT PIN

(COMPARATOR MODE)

POLARITY = ACTIVE HIGH

THIGH

THIGH –THYST

TIME

READ

Figure 22. INT Output Temperature Response Diagram for THIGH Overtemperature Events

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