STM32F302XD datasheet(138/168 Pages) STMICROELECTRONICS

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Electrical characteristics

STM32F302xD STM32F302xE

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DocID026900 Rev 4

Figure 50. ADC accuracy characteristics

Table 85. ADC accuracy at 1MSPS(1)(2)

Symbol

Parameter

Test conditions

Typ

Max(3)

Unit

Total unadjusted error

ADC Freq ≤ 72 MHz

Sampling Freq ≤ 1MSPS

2.4 V ≤ VDDA = VREF+ ≤ 3.6 V

Single-ended mode

Fast channel

±2.5

±5

LSB

Slow channel

±3.5

±5

Offset error

Fast channel

±1

±2.5

Slow channel

±1.5

±2.5

Gain error

Fast channel

±2

±3

Slow channel

±3

±4

Differential linearity error

Fast channel

±0.7

±2

Slow channel

±0.7

±2

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 6.3.15: I/O port characteristics does not affect the ADC

accuracy.

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

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