TM4C1230H6PM Datasheet, PDF (734/1104 Pages) Texas Instruments – Tiva™ TM4C1230H6PM Microcontroller

Analog-to-Digital Converter (ADC)
Figure 12-10. Differential Voltage Representation
0xFFF
0x800
-(VREFP - VREFN)
0
V
- Input Saturation
VREFP - VREFN
12.3.6
Internal Temperature Sensor
The temperature sensor's primary purpose is to notify the system that the internal temperature is
too high or low for reliable operation.
The temperature sensor does not have a separate enable, because it also contains the bandgap
reference and must always be enabled. The reference is supplied to other analog modules; not just
the ADC.
The internal temperature sensor converts a temperature measurement into a voltage. This voltage
value, V_TSENS, is given by the following equation (where TEMP is the temperature in °C):
V_TSENS = 2.7 - ((TEMP + 55) / 75)
This relation is shown in Figure 12-11 on page 735.
734
June 12, 2014
Texas Instruments-Production Data