Datasheet

DocID025409 Rev 8 93/121
STM32F334x4 STM32F334x6 STM32F334x8 Electrical characteristics
101
EL
Integral
linearity
error
ADC clock freq. ≤ 72 MHz,
Sampling freq. ≤ 5 Msps
2.0 V ≤ V
DDA
≤ 3.6 V
Single
ended
Fast channel 5.1 Ms - ±3
LSB
Slow channel 4.8 Ms - ±3.5
Differential
Fast channel 5.1 Ms - ±2
Slow channel 4.8 Ms - ±2.5
ENOB
(5)
Effective
number of
bits
Single
ended
Fast channel 5.1 Ms 10.4 -
bits
Slow channel 4.8 Ms 10.4 -
Differential
Fast channel 5.1 Ms 10.8 -
Slow channel 4.8 Ms 10.8 -
SINAD
(5)
Signal-to-
noise and
distortion
ratio
Single
ended
Fast channel 5.1 Ms 64 -
dB
Slow channel 4.8 Ms 63 -
Differential
Fast channel 5.1 Ms 67 -
Slow channel 4.8 Ms 67 -
SNR
(5)
Signal-to-
noise ratio
ADC clock freq. ≤ 72 MHz,
Sampling freq ≤ 5 Msps,
2.0 V ≤ V
DDA
≤ 3.6 V
Single
ended
Fast channel 5.1 Ms 64 -
Slow channel 4.8 Ms 64 -
Differential
Fast channel 5.1 Ms 67 -
Slow channel 4.8 Ms 67 -
THD
(5)
To ta 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 must 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. Data based on characterization results, not tested in production.
5. Value measured with a -0.5 dB full scale 50 kHz sine wave input signal.
Table 67. ADC accuracy
(1)(2)(3)
(continued)
Symbol Parameter Conditions Min.
(4)
Max.
(4)
Unit
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