STM32L152C8H6(2013) View Datasheet(PDF) - STMicroelectronics
Part Name
Description
MFG CO.
STM32L152C8H6
(Rev.:2013)
(Rev.:2013)
STMicroelectronics
STM32L152C8H6 Datasheet PDF : 121 Pages
| |||
Functional overview
STM32L151x6/8/B, STM32L152x6/8/B
3.10
3.10.1
ADC (analog-to-digital converter)
A 12-bit analog-to-digital converters is embedded into STM32L15xxx devices with up to 24
external channels, performing conversions in single-shot or scan mode. In scan mode,
automatic conversion is performed on a selected group of analog inputs.
The ADC can be served by the DMA controller.
An analog watchdog feature allows very precise monitoring of the converted voltage of one,
some or all selected channels. An interrupt is generated when the converted voltage is
outside the programmed thresholds.
The events generated by the general-purpose timers (TIMx) can be internally connected to
the ADC start trigger and injection trigger, to allow the application to synchronize A/D
conversions and timers. An injection mode allows high priority conversions to be done by
interrupting a scan mode which runs in as a background task.
The ADC includes a specific low power mode. The converter is able to operate at maximum
speed even if the CPU is operating at a very low frequency and has an auto-shutdown
function. The ADC’s runtime and analog front-end current consumption are thus minimized
whatever the MCU operating mode.
Temperature sensor
The temperature sensor (TSENSE) generates a voltage VSENSE that varies linearly with
temperature.
The temperature sensor is internally connected to the ADC_IN16 input channel which is
used to convert the sensor output voltage into a digital value.
The sensor provides good linearity but it has to be calibrated to obtain good overall accuracy
of the temperature measurement. As the offset of the temperature sensor varies from chip
to chip due to process variation, the uncalibrated internal temperature sensor is suitable for
applications that detect temperature changes only.
To improve the accuracy of the temperature sensor measurement, each device is
individually factory-calibrated by ST. The temperature sensor factory calibration data are
stored by ST in the system memory area, accessible in read-only mode.
Table 6. Temperature sensor calibration values
Calibration value name
Description
TSENSE_CAL1
TSENSE_CAL2
TS ADC raw data acquired at
temperature of 30 °C,
VDDA= 3 V
TS ADC raw data acquired at
temperature of 110 °C
VDDA= 3 V
Memory address
0x1FF8 007A-0x1FF8 007B
0x1FF8 007E-0x1FF8 007F
24/121
Doc ID 17659 Rev 8
Share Link: 