SBOS740A May 2017 – May 2019 TMP116
The device temperature sampling distribution (without internal averaging) covers an area of approximately six neighboring codes. The noise area of the six codes remains the same at full supply and full temperature range with a standard deviation of approximately 1 LSB. The device provides an averaging tool for 8, 32, and 64 samples. As illustrated in Figure 7, even the 8-sample averaging reduces the internal noise distribution to a theoretical minimum of 2 LSB. This averaging means that if the system temperature slowly changes and the supply voltage is stable, then the 8-sample averaging can be enough to neutralize the device internal noise and provide stable temperature readings. However, if the system temperature is noisy (such as when measuring air flow temperatures) or noisy power supply line or intensive communication in the I2C line, then higher averaging numbers are recommended to be used.