STM32F328C8 datasheet(90/109 Pages) STMICROELECTRONICS

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Electrical characteristics

STM32F328C8

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DocID026351 Rev 3

SNR(4)

Signal-to-

noise ratio

ADC clock freq.

≤ 72 MHz

Sampling freq

≤ 5 Msps

VDDA = 3.3 V

25°C

Single ended

Fast channel 5.1 Ms

Slow channel 4.8 Ms

Differential

Fast channel 5.1 Ms

Slow channel 4.8 Ms

THD(4)

Total

harmonic

distortion

Single ended

Fast channel 5.1 Ms

-80

Slow channel 4.8 Ms

-78

-77

Differential

Fast channel 5.1 Ms

-83

-82

Slow channel 4.8 Ms

-81

-80

1. ADC DC accuracy values are measured after internal calibration.

2. ADC accuracy vs. negative Injection Current: Injecting negative current on any analog input pins should be avoided as this

significantly reduces the accuracy of the conversion being performed on another analog input. It is recommended to add a

Schottky diode (pin to ground) to analog pins which may potentially inject negative current.

Any positive injection current within the limits specified for IINJ(PIN) and ΣIINJ(PIN) in Section 6.3.13 does not affect the ADC

accuracy.

3. Data based on characterization results, not tested in production.

4. Value measured with a -0.5 dB full scale 50 kHz sine wave input signal.

Table 58. ADC accuracy - limited test conditions(1)(2) (continued)

Symbol Parameter

Conditions

Min

(3)

Typ

Max

(3)

Unit

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