TMP114 datasheet(18/50 Pages) TI

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8.4.2.1 One-Shot Temperature Conversions

When the OS bit is set to 1b in the Configuration register, the TMP114 immediately start a one-shot temperature

conversion. If the TMP114 is performing a temperature conversion, the device will stop the active conversion and

discard the partial result, then start a new one-shot conversion. After completing the one-shot conversion the

TMP114 will enter shutdown mode, the OS bit will be cleared, and the Mode bit will be set to 1b. If a one-shot

conversion is triggered in continuous mode the device will enter shutdown mode after the one-shot conversion

completes.

Active conversion time

Start of conversion

tShutdownt

2C One-Shot Command

Temperature Conversion

Temp_Result Updated

Figure 8-5. One-Shot Timing Diagram

If the One_Shot bit is continuously written as faster than the active conversion time of the TMP114, the device

will continue to restart the temperature conversion with each new write to the One_Shot bit. TI recommends to

avoid this behavior because the temperature result does not update until a conversion finishes. If the system

triggers several continuous one-shot conversions, Figure 8-6 depicts how the device would continually partially

finish new conversions and not update the Temp_Result register.

Active conversion time

Start of first conversion

2C One-Shot Command

Start of new conversions

Discard partial conversion

Temp_Result Updated

Temperature Conversion

Figure 8-6. One-Shot Continuous Trigger Timing Diagram

TMP114

SNIS214A – JUNE 2021 – REVISED SEPTEMBER 2021

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TMP114 Datasheet(PDF) 18 Page - Texas Instruments