SBOS740A May 2017 – May 2019 TMP116
Noise in the conversion result can be reduced by configuring the device to report the average of multiple temperature conversions using the AVG[1:0] bits. When the TMP116 is configured to perform averaging, the device executes the configured number of conversions while accumulating the results and reports the average of all conversion results at the end of the process. As illustrated in the noise histograms of Figure 6 and Figure 7, the temperature result output has a repeatability of approximately ±3 LSBs when there is no averaging and ±1 LSB when the device is configured to perform eight averages or higher. As illustrated in Figure 20, this improvement in noise performance is achieved with the tradeoff of an increase in the active conversion time in a conversion cycle, thereby increasing the average active current consumption. For example, a single active conversion typically takes 15.5 ms so if the device is configured to report an average of eight conversions then the active conversion time is 124 ms (15.5 ms × 8). Use Equation 1 to factor in this increase in active conversion time to accurately calculate the average current consumption of the device. The average current consumption of the device can be decreased by increasing the amount of time the device spends in standby period as compared to active conversion. Under the factory EEPROM settings, the device is configured to report an average of eight conversions with a conversion cycle time of 1 second.
Use Equation 1 to calculate the average current consumption of the device in continuous mode.