Datasheet

Electrical characteristics STM32F303xB STM32F303xC
116/149 DS9118 Rev 14
SNR
(5)
Signal-to-
noise ratio
ADC clock freq. ≤ 72 MHz,
Sampling freq ≤ 5 Msps,
2 V ≤ V
DDA
≤ 3.6 V
64-pin package
Single ended
Fast channel 5.1 Ms 64 -
dB
Slow channel 4.8 Ms 64 -
Differential
Fast channel 5.1 Ms 67 -
Slow channel 4.8 Ms 67 -
THD
(5)
Tot a l
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 I
INJ(PIN)
and ΣI
INJ(PIN)
in Section 6.3.14 does not affect the ADC
accuracy.
3. Better performance may be achieved in restricted V
DDA
, 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
ET Total unadjusted error
ADC Freq ≤ 72 MHz
Sampling Freq ≤ 1MSPS
2.4 V ≤ V
DDA
= V
REF+
≤ 3.6 V
Single-ended mode
Fast channel ±2.5 ±5
LSB
Slow channel ±3.5 ±5
EO Offset error
Fast channel ±1 ±2.5
Slow channel ±1.5 ±2.5
EG Gain error
Fast channel ±2 ±3
Slow channel ±3 ±4
ED Differential linearity error
Fast channel ±0.7 ±2
Slow channel ±0.7 ±2
EL 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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