STM32F207ICH6 datasheet(127/184 Pages) STMICROELECTRONICS

Part #	STM32F207ICH6

Description	ARM®-based 32-bit MCU, 150DMIPs, up to 1 MB Flash/1284KB RAM, USB OTG HS/FS, Ethernet, 17 TIMs, 3 ADCs, 15 comm. interfaces & camera

PDF	184 Pages

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Manufacturer	STMICROELECTRONICS [STMicroelectronics]

Direct Link	http://www.st.com

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DocID15818 Rev 15

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STM32F20xxx

Electrical characteristics

183

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 ΣIINJ(PIN) in

Section 6.3.16 does not affect the ADC accuracy.

Figure 52. ADC accuracy characteristics

1. Example of an actual transfer curve.

2. Ideal transfer curve.

3. End point correlation line.

4. 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.

Figure 53. Typical connection diagram using the ADC

1. Refer to Table 66 for the values of RAIN, RADC and CADC.

2. Cparasitic represents the capacitance of the PCB (dependent on soldering and PCB layout quality) plus the

pad capacitance (roughly 7 pF). A high Cparasitic value downgrades conversion accuracy. To remedy this,

fADC should be reduced.

STM32F207ICH6 Datasheet(PDF) 127 Page - STMicroelectronics