STM32MP151D datasheet(194/253 Pages) STMICROELECTRONICS

194 / 253 page

Electrical characteristics

STM32MP151A/D

194/253

DS12500 Rev 3

Table 76. ADC accuracy(1)(2)(3)(4)(5)(6)(7)

Symbol

Parameter

Conditions(8)

Min

Typ(9)

Max

Unit

ET(10)

Total

unadjusted

error

Single ended

BOOST = 1

±5

±LSB

BOOST = 0

±7

Differential

BOOST = 1

±6

BOOST = 0

±5

Differential

linearity error

Single ended

BOOST = 1

BOOST = 0

Differential

BOOST = 1

BOOST = 0

Integral

linearity error

Single ended

BOOST = 1

±6

BOOST = 0

±4

Differential

BOOST = 1

±6

BOOST = 0

±4

ENOB(11)

Effective

number of

bits

(2 MSPS)

Single ended

BOOST = 1

12.5

bits

BOOST = 0

12.75

Differential

BOOST = 1

13.3

BOOST = 0

13.7

SINAD(11)

Signal-to-

noise and

distortion

ratio

(2 MSPS)

Single ended

BOOST = 1

77.5

BOOST = 0

78.75

Differential

BOOST = 1

BOOST = 0

84.2

SNR(11)

Signal-to-

noise ratio

(2 MSPS)

Single ended

BOOST = 1

77.6

BOOST = 0

Differential

BOOST = 1

82.4

BOOST = 0

84.3

THD(11)

Total

harmonic

distortion

Single ended

BOOST = 1

-85

BOOST = 0

-88

Differential

BOOST = 1

-90

BOOST = 0

-93

1. Guaranteed by characterization.

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

3. ADC accuracy versus 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.

4. The above table gives the ADC performance in 16-bit mode.

5. Dual Simultaneous mode is limited to 12-bit.

6. Dual mode consisting in an injected conversion (reset) occurring during another (regular) conversion is forbidden.

7. Dual Interleaved 16-bit/14-bit/12-bit modes can work if the delay between the 2 ADCs is as specified in Table 77.

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