TMP114 datasheet(11/43 Pages) TI

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7.3.3 Slew Rate Warning

The slew warning alert is an alert option that can be adjusted with the Slew_Limit register. The slew rate

warning will notify the system of temperature spikes as they occur, allowing the system to react and correct

for the increase in temperature before reaching thermal operating limits. Compared to throttling a system after

crossing a thermal limit, the slew rate warning will allow more safe system operation and greater reliability by not

exceeding specified system operating conditions.

Time

High temperature limit

Low temperature limit

System adjusts to fix temperature

spike before hitting overtemperature

condition

ALERT

Figure 7-2. Slew Rate Alert

Calculating the slew rate requires a fixed time period to calculate and is only available in continuous mode. The

Slew_Limit register is used to set the unsigned limit. The TMP114 will monitor the temperature slew rate and

compare the positive change of temperature from the current conversion to the previous against the Slew_Limit.

If the slew rate exceeds the Slew_Limit, the respective bits in the Alert_Status register will be set to indicate

the warning. Figure 7-2 depicts the timing of the Slew Rate Warning relative to the temperature conversions.

The slew rate check is always applied to the current temperature conversion and the previous temperature

conversion.

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TMP114

SNIS214 – JUNE 2021

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TMP114 Datasheet(PDF) 11 Page - Texas Instruments