STM32F334C8U6TR datasheet(95/125 Pages) STMICROELECTRONICS

95 / 125 page

DS9994 Rev 9

95/125

STM32F334x4 STM32F334x6 STM32F334x8

Electrical characteristics

103

Integral

linearity

error

ADC clock freq.

≤ 72 MHz,

Sampling freq.

≤ 5 Msps

2.0 V

≤ VDDA ≤ 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

Slow channel 4.8 Ms

Differential

Fast channel 5.1 Ms

Slow channel 4.8 Ms

SNR(5)

Signal-to-

noise ratio

ADC clock freq.

≤ 72 MHz,

Sampling freq

≤ 5 Msps,

2.0 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 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 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. 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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