STM32F427AI datasheet(161/240 Pages) STMICROELECTRONICS

部件名	STM32F427AI

功能描述	32b Arm® Cortex®-M4 MCUFPU, 225DMIPS, up to 2MB Flash/2564KB RAM, USB OTG HS/FS, Ethernet, 17 TIMs, 3 ADCs, 20 com. interfaces, camera & LCD-TFT

PDF	240 Pages

Scroll/Zoom	100%

制造商	STMICROELECTRONICS [STMicroelectronics]

网页	http://www.st.com

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161 / 240 page

DS9405 Rev 12

161/240

STM32F427xx STM32F429xx

Electrical characteristics

197

Note:

ADC accuracy vs. negative injection current: injecting a 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 currents.

Any positive injection current within the limits specified for IINJ(PIN) and ∑IINJ(PIN) in

Section 6.3.17 does not affect the ADC accuracy.

Figure 50. ADC accuracy characteristics

1. See also Table 77.

2. Example of an actual transfer curve.

3. Ideal transfer curve.

4. End-point correlation line.

5. ET = Total Unadjusted Error: maximum deviation between the actual and the ideal transfer curves.

EO = Offset Error: deviation between the first actual transition and the first ideal one.

EG = Gain Error: deviation between the last ideal transition and the last actual one.

ED = Differential Linearity Error: maximum deviation between actual steps and the ideal one.

EL = Integral Linearity Error: maximum deviation between any actual transition and the end-point

correlation line.

ai14395c

1L SBIDEAL

4095

4094

4093

456

4093 4094 4095 4096

(1)

(2)

(3)

VDDA

VSSA

V REF+

4096

(or

depending on package)]

V DDA

4096

[1LSB IDEAL=

STM32F427AI 数据表(PDF) 161 Page - STMicroelectronics

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