As illustrated in Figure 5-2, the ISOTMP35-Q1 device exhibit a linear output of 10mV/°C. For temperature above 100°C, a small gain shift (T_C) is present on the output (V_OUT). When small shifts are expected, a piecewise linear function provides the best accuracy and is used for the device accuracy specifications. Table 7-2 lists the typical output voltages of the ISOTMP35-Q1 device across the full operating temperature range. The calculated linear column represents the ideal linear V_OUT output response with respect to temperature, while the piecewise linear columns indicate the small voltage shift at elevated temperatures.

The piecewise linear function uses three temperature ranges listed in Table 7-1. Use Equation 1 to calculate the voltage output V_OUT of the ISOTMP35-Q1:

where

• V_OUT is the voltage output for a given temperature
• T_A is the ambient temperature in°C
• T_INFL is the temperature inflection point for a piecewise segment in°C
• T_C is the temperature coefficient or gain
• V_OFFS is the voltage offset

Use Table 7-2 to calculate the ambient temperature (T_A) for a given V_OUT voltage output within a piecewise voltage range (V_RANGE). For applications where the accuracy enhancement above 100°C is not required, use the first row of Table 7-1 for all voltages.