ST7263BEx datasheet(163/186 Pages) STMICROELECTRONICS

部件名	ST7263BEx

功能描述	Low speed USB 8-bit MCU family with up to 32 KB Flash/ROM, DFU capability, 8-bit ADC, WDG, timer, SCI and I²C

PDF	186 Pages

Scroll/Zoom	100%

制造商	STMICROELECTRONICS [STMicroelectronics]

网页	http://www.st.com

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163 / 186 page

ST7263Bxx

Electrical characteristics

Doc ID 7516 Rev 8

163/186

Figure 77.

Typical application with ADC

Table 79.

ADC accuracy with VDD=5 V, fCPU= 8 MHz, fADC=4 MHz, RAIN< 10 κΩ

Symbol

Parameter

Typ

Max(1)(2)

Data based on characterization results over the whole temperature range, not tested in production.

Data based on characterization results, to guarantee 99.73% within ± max value from 0 to 70 °C ( ± 3s

distribution limits).

|ET|

Total unadjusted error(3)

ADC Accuracy vs. Negative Injection Current:

For IINJ-=0.8mA, the typical leakage induced inside the die is 1.6µA and the effect on the ADC accuracy is

a loss of 1 LSB for each 10K

Ω increase of the external analog source impedance. This effect on the ADC

accuracy has been observed under worst-case conditions for injection:

- negative injection

- injection to an input with analog capability, adjacent to the enabled Analog input

- at 5V VDD supply, and worst case temperature.

1.5

|EO|

Offset error(3)

0.5

|EG|

Gain Error(3)

0.5

1.5

|ED|

Differential linearity error(3)

11.5

|EL|

Integral linearity error(3)

11.5

AINx

ST72XXX

CIO

~2pF

VDD

±1

μA

0.6V

VAIN

RAIN

VDDA

VSSA

0.1

μF

VDD

ADC

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