STM32W108CB datasheet(225/278 Pages) STMICROELECTRONICS

Part #	STM32W108CB

Description	High-performance, IEEE 802.15.4 wireless system-on-chip with up to 256 Kbytes of embedded Flash memory

PDF	278 Pages

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Manufacturer	STMICROELECTRONICS [STMicroelectronics]

Direct Link	http://www.st.com

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225 / 278 page

STM32W108HB STM32W108CC STM32W108CB STM32W108CZ

Analog-to-digital converter

Doc ID 16252 Rev 14

225/278

Gain

32768

16384

VREF

GND

–

()

------------------------------------------

Offset (after applying gain correction)

57344

GND

–

()

Equation notes

●

All N are 16-bit two’s complement numbers.

●

NGND is a sampling of ground. Due to the ADC's internal design, VGND does not yield

the minimum two’s complement value 0x8000 as the conversion result. Instead, VGND

yields a two’s complement value close to 0xE000 when the input buffer is not selected.

VGND cannot be measured when the input buffer is enabled because it is outside the

buffer’s input range.

●

NVREF is a sampling of VREF. Due to the ADC's internal design, VREF does not yield

the maximum positive two’s complement 0x7FFF as the conversion result. Instead,

VREF yields a two’s complement value close to 0x2000 when the input buffer is not

selected and yields a two’s complement value close to 0xF000 when the input buffer is

selected.

●

Offset correction is affected by the gain correction value. Offset correction is calculated

after gain correction has been applied.

Table 41.

ADC gain and offset correction equations

Calibration

Correction value

STM32W108CB Datasheet(PDF) 225 Page - STMicroelectronics