Texas Instruments MSP430x4xx - Manual (Page 418)

SD16 Operation
21-15 SD16
21.2.10 Using the Integrated Temperature Sensor
To use the on-chip temperature sensor, the user selects the analog input
channel SD16INCHx = 110. Any other configuration is done as if an external
channel was selected, including SD16INTDLYx and SD16GAINx settings.
The typical temperature sensor transfer function is shown in Figure 21−11.
When switching inputs of an SD16 channel to the temperature sensor,
adequate delay must be provided using SD16INTDLYx to allow the digital filter
to settle and assure that conversion results are valid. The temperature sensor
offset error can be large, and may need to be calibrated for most applications.
See device-specific data sheet for temperature sensor parameters.
Figure 21−11.Typical Temperature Sensor Transfer Function
Celsius
Volts
0 50 100
0.350
0.250
0.300
0.400
0.450
0.500
−50
0.200
V
Sensor,typ
= TC
Sensor
(273 + T[ o C]) + V
Offset, sensor
[mV]