ST72F262G2B6 datasheet(170/172 Pages) STMICROELECTRONICS

Part #	ST72F262G2B6

Description	8-BIT MCU WITH FLASH OR ROM MEMORY, ADC, TWO 16-BIT TIMERS, I2C, SPI, SCI INTERFACES

PDF	172 Pages

Scroll/Zoom	100%

Manufacturer	STMICROELECTRONICS [STMicroelectronics]

Direct Link	http://www.st.com

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170 / 172 page

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bit) accuracy does not meet the accuracy specified

in the data sheet.

Workaround

In order to have the accuracy specified in the da-

tasheet, the first conversion after a ADC switch-on

has to be ignored.

16.2.11 Negative injection impact on ADC

accuracy

Injecting a negative current on an analog input

pins significantly reduces the accuracy of the AD

Converter. Whenever necessary, the negative in-

jection should be prevented by the addition of a

Schottky diode between the concerned I/Os and

ground.

Injecting a negative current on digital input pins

degrades ADC accuracy especially if performed

on a pin close to ADC channel in use.

16.2.12 ADC conversion spurious results

Spurious conversions occur with a rate lower than

50 per million. Such conversions happen when the

measured voltage is just between 2 consecutive

digital values.

Workaround

A software filter should be implemented to remove

erratic conversion results whenever they may

cause unwanted consequences.

ST72F262G2B6 Datasheet(PDF) 170 Page - STMicroelectronics