STM32F318C8 datasheet(99/125 Pages) STMICROELECTRONICS

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STM32F318C8 STM32F318K8

Electrical characteristics

107

SNR(5)

Signal-to-

noise ratio

ADC clock freq.

72 MHz,

Sampling freq

5 Msps,

1.8 V

VDDA  3.6 V

Single ended

Fast channel 5.1 Ms

Slow channel 4.8 Ms

Differential

Fast channel 5.1 Ms

Slow channel 4.8 Ms

THD(5)

Total

harmonic

distortion

Single ended

Fast channel 5.1 Ms

-75

Slow channel 4.8 Ms

-75

Differential

Fast channel 5.1 Ms

-79

Slow channel 4.8 Ms

-78

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 IINJ(PIN) in Section 6.3.13 does not affect the ADC

accuracy.

3. Better performance may be achieved in restricted VDDA, frequency and temperature ranges.

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

5. Value measured with a –0.5dB Full Scale 50kHz sine wave input signal.

Table 62. ADC accuracy (1)(2)(3) (continued)

Symbol Parameter

Conditions

Min(4)

Max

(4)

Unit

Table 63. ADC accuracy(1)(2)

Symbol

Parameter

Test conditions

Typ

Max(3)

Unit

Total unadjusted error

ADC Freq ≤ 72 MHz



Sampling Freq ≤ 1MSPS



2.4 V ≤ VDDA = VREF+ ≤ 3.6 V

Single-ended mode

Fast channel

±2.5

±5

LSB

Slow channel

±3.5

±5

Offset error

Fast channel

±1

±2.5

Slow channel

±1.5

±2.5

Gain error

Fast channel

±2

±3

Slow channel

±3

±4

Differential linearity error

Fast channel

±0.7

±2

Slow channel

±0.7

±2

Integral linearity error

Fast channel

±1

±3

Slow channel

±1.2

±3

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 ∑IINJ(PIN) in Section 6.3.13: I/O port characteristics does not affect the ADC

accuracy.

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

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