For a simple NTC thermistor design, the converting from an NTC thermistor to the TMP6 Linear Thermistor is straightforward. The only hardware change is to swap the NTC thermistor and the TMP61 thermistor, while R_BIAS can be left as is. The resulting transformation can be seen in Figure 2-4 below.

Figure 2-4 TMP6 Linear Thermistor Voltage Divider Circuit

The circuit above results in the following voltage response. Notice how the voltage response is positive.

Figure 2-5 TMP6 Linear Thermistor Positive Voltage Response.

A positive voltage response can be used for new designs, but matching a negative response that the original NTC thermistor circuit generated may be useful for old designs. To provide a negative voltage response with the TMP6 Linear Thermistor, the bias resistor and TMP6 Linear Thermistor must switch positions. After redesigning, you can see the resulting negative voltage response below.

Figure 2-7 TMP6 Linear Thermistor Negative Voltage Response.