STM32F303RB datasheet(115/148 Pages) STMICROELECTRONICS

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STM32F303xB STM32F303xC

Electrical characteristics

124

SNR(5)

Signal-to-

noise ratio

ADC clock freq.

≤ 72 MHz,

Sampling freq

≤ 5 Msps,

2 V

≤ VDDA ≤ 3.6 V

64-pin package

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 ΣIINJ(PIN) in Section 6.3.14 does not affect the ADC

accuracy.

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

4. Guaranteed by characterization results.

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

Table 73. ADC accuracy, 64-pin packages(1)(2)(3) (continued)

Symbol Parameter

Conditions

Min(4)

Max

(4)

Unit

Table 74. ADC accuracy at 1MSPS(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 6.3.14: I/O port characteristics does not affect the ADC

accuracy.

3. Guaranteed by characterization results.

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