LM3S5G31 Datasheet, PDF (635/1223 Pages) Texas Instruments – Stellaris LM3S5G31 Microcontroller

Stellaris^® LM3S5G31 Microcontroller
Figure 13-13. Differential Sampling Range, V_{IN_ODD} = 2.25 V
12-bit
0xFFF
10-bit
0x3FF
0xBFF 0x2FF
0x7FF 0x1FF
0.75 V
-1.5 V
2.25 V
3.0 V
0.75 V
- Input Saturation
1.5 V
V_{IN_EVEN}
DV
13.3.6
Internal Temperature Sensor
The temperature sensor serves two primary purposes: 1) to notify the system that internal temperature
is too high or low for reliable operation and 2) to provide temperature measurements for calibration
of the Hibernate module RTC trim value.
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. In addition, the temperature sensor has a second power-down input in the 3.3 V domain
which provides control by the Hibernation module.
The internal temperature sensor provides an analog temperature reading as well as a reference
voltage. This reference voltage, SENSO, is given by the following equation:
SENSO = 2.7 - ((T + 55) / 75)
This relation is shown in Figure 13-14 on page 636.
July 03, 2014
635
Texas Instruments-Production Data