SLOS887E September 2014 – December 2018 TMP112-Q1
The initial accuracy assurance at 25°C with the slope regions provides an accuracy that is high enough for most applications. However, if higher accuracy is desired, this increase can be achieved with a 1-point calibration at 25°C. This calibration removes the offset at room temperature, thereby reducing the source of error in a TMP112-Q1 temperature reading down to the curvature. Figure 18 shows the error of a calibrated TMP112-Q1 device.
Using the previous example temperature range of 0°C to 50°C, the worst-case temperature error is now reduced to the worst-case slopes because the offset at 25°C (that is, the maximum and minimum temperature errors of 0.3°C and –0.5°C) is removed. Therefore, a user can expect the worst-case accuracy to improve to 0.175°C.