STM32F334X4 datasheet(91/115 Pages) STMICROELECTRONICS

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STM32F334x4 STM32F334x6 STM32F334x8

Electrical characteristics

100

SNR(4)

Signal-to-

noise ratio

ADC clock freq.

≤ 72 MHz

Sampling freq

≤ 5 Msps

VDDA = 3.3 V

25°C

Single ended

Fast channel 5.1 Ms

Slow channel 4.8 Ms

Differential

Fast channel 5.1 Ms

Slow channel 4.8 Ms

THD(4)

Total

harmonic

distortion

Single ended

Fast channel 5.1 Ms

-80

Slow channel 4.8 Ms

-78

-77

Differential

Fast channel 5.1 Ms

-83

-82

Slow channel 4.8 Ms

-81

-80

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

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

Table 66. ADC accuracy - limited test conditions(1)(2) (continued)

Symbol Parameter

Conditions

Min

(3)

Typ

Max

(3)

Unit

Table 67. ADC accuracy (1)(2)(3)

Symbol Parameter

Conditions

Min(4)

Max

(4)

Unit

Total

unadjusted

error

ADC clock freq.

≤ 72 MHz,

Sampling freq.

≤ 5 Msps

2.0 V

≤ VDDA ≤ 3.6 V

Single ended

Fast channel 5.1 Ms

±6.5

LSB

Slow channel 4.8 Ms

±6.5

Differential

Fast channel 5.1 Ms

±4

Slow channel 4.8 Ms

±4.5

Offset error

Single ended

Fast channel 5.1 Ms

±3

Slow channel 4.8 Ms

±3

Differential

Fast channel 5.1 Ms

±2.5

Slow channel 4.8 Ms

±2.5

Gain error

Single ended

Fast channel 5.1 Ms

±6

Slow channel 4.8 Ms

±6

Differential

Fast channel 5.1 Ms

±3.5

Slow channel 4.8 Ms

±4

Differential

linearity

error

Single ended

Fast channel 5.1 Ms

±1.5

Slow channel 4.8 Ms

±1.5

Differential

Fast channel 5.1 Ms

±1.5

Slow channel 4.8 Ms

±1.5

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