STM32U073RCT6 datasheet(91/146 Pages) STMICROELECTRONICS

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Table 72. ADC accuracy

1. Evaluated by characterization, not tested in production.

2. ADC DC accuracy values are measured after internal calibration.

3. Injecting negative current on any analog input pin significantly reduces the accuracy of A-to-D conversion of signal on another analog input.

It is recommended to add a Schottky diode (pin to ground) to analog pins susceptible to receive negative current.

Symbol

Parameter

Conditions(1)

Min

Typ

Max

Unit

Total unadjusted error

VDDA = VREF+ = 3 V;

fADC = 35 MHz; fs ≤ 2.5 MSps;

TA = 25 °C

LSB

2 V < VDDA=VREF+ < 3.6 V;

fADC = 35 MHz; fs ≤ 2.5 MSps;

TA = entire range

6.5

1.65 V < VDDA=VREF+ < 3.6 V;

TA = entire range

Range 1: fADC = 35 MHz; fs ≤ 2.2 MSps;

Range 2: fADC = 16 MHz; fs ≤ 1.1 MSps;

7.5

Offset error

VDDA = VREF+ = 3 V;

fADC = 35 MHz; fs ≤ 2.5 MSps;

TA = 25 °C

1.5

LSB

2 V < VDDA = VREF+ < 3.6 V;

fADC = 35 MHz; fs ≤ 2.5 MSps;

TA = entire range

1.5

5.5

1.65 V < VDDA=VREF+ < 3.6 V;

TA = entire range

Range 1: fADC = 35 MHz; fs ≤ 2.2 MSps;

Range 2: fADC = 16 MHz; fs ≤ 1.1 MSps;

1.5

Gain error

VDDA = VREF+ = 3 V;

fADC = 35 MHz; fs ≤ 2.5 MSps;

TA = 25 °C

3.5

LSB

2 V < VDDA = VREF+ < 3.6 V;

fADC = 35 MHz; fs ≤ 2.5 MSps;

TA = entire range

1.65 V < VDDA = VREF+ < 3.6 V;

TA = entire range

Range 1: fADC = 35 MHz; fs ≤ 2.2 MSps;

Range 2: fADC = 16 MHz; fs ≤ 1.1 MSps;

6.5

Differential linearity error

VDDA = VREF+ = 3 V;

fADC = 35 MHz; fs ≤ 2.5 MSps;

TA = 25 °C

1.2

2.5

LSB

2 V < VDDA = VREF+ < 3.6 V;

fADC = 35 MHz; fs ≤ 2.5 MSps;

TA = entire range

1.2

2.5

1.65 V < VDDA = VREF+ < 3.6 V;

TA = entire range

Range 1: fADC = 35 MHz; fs ≤ 2.2 MSps;

Range 2: fADC = 16 MHz; fs ≤ 1.1 MSps;

1.2

2.5

Integral linearity error

VDDA = VREF+ = 3 V;

fADC = 35 MHz;

fs ≤ 2.5 MSps;

TA = 25 °C

2.5

LSB

STM32U073x8/B/C

Electrical characteristics

DS14548 - Rev 2

page 91/146

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