STM32W108CB datasheet(251/278 Pages) STMICROELECTRONICS

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STM32W108HB STM32W108CC STM32W108CB STM32W108CZ

Electrical characteristics

Doc ID 16252 Rev 14

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Table 59 lists other specifications for the ADC not covered in Table 56, Table 57, and

Table 58.

VREF

VREF output current

VREF load capacitance

External VREF voltage range

External VREF input impedance

Minimum input voltage

Maximum input voltage

Single-ended signal range

Differential signal range

Common mode range

Input referred ADC offset

Input Impedance

Note:

The signal-ended ADC measurements are limited in their range and only guaranteed for

accuracy within the limits shown in this table. The ADC's internal design allows for

measurements outside of this range (±200 mV) when the input buffer is disabled, but the

accuracy of such measurements is not guaranteed. The maximum input voltage is of more

interest to the differential sampling where a differential measurement might be small, but a

common mode can push the actual input voltage on one of the signals towards the upper

voltage limit.

Table 59.

ADC characteristics

Parameter

Min.

Typ.

Max.

Units

1.17

1.2

1.23

––

–

1.1

1.2

1.3

1–

–

Input buffer disabled

Input buffer enabled

0.1

–

Input buffer disabled

Input buffer enabled

–

VREF

VDD_PADS - 0.1

Input buffer disabled

Input buffer enabled

0.1

–

VREF

VDD_PADS – 0.1

Input buffer disabled

Input buffer enabled

-VREF

-VDD_PADS + 0.1

–

+VREF

+VDD_PADS - 0.1

Input buffer disabled

Input buffer enabled

VDD_PADS/2

VREF

-10

–

1 MHz sample clock

6 MHz sample clock

Not sampling

0.5

–

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