ST72T631K4D0 데이터 시트보기 (PDF) - STMicroelectronics

부품명

상세내역

제조사

ST72T631K4D0

LOW SPEED USB 8-BIT MCU FAMILY with up to 16K MEMORY, up to 512 BYTES RAM, 8-BIT ADC, WDG, TIMER, SCI & I2C

STMicroelectronics 

ST7263

7.9 8-BIT ADC CHARACTERISTICS

Digital Result ADCDR

GE

255

254

253

1LSBideal

=

V-----D-----D-----A-----–-----V----S----S-----A--

256

(2)

7

TUE

6

(3)

(1)

5

OE

ILE

4

3

DLE

2

1

1 LSB(ideal)

0

1234567

VSSA

253 254 255 256

VDDA

(1) Example of an actual transfer curve

(2) The ideal transfer curve

(3) End point correlation line

TUE=Total Unadjusted Error: maximum deviation

between the actual and the ideal transfer curves.

OE=Offset Error: deviation between the first actual

transition and the first ideal one.

GE=Gain Error: deviation between the last ideal

transition and the last actual one.

DLE=Differential Linearity Error: maximum devia-

tion between actual steps and the ideal one.

ILE=Integral Linearity Error: maximum deviation

between any actual transition and the end point

correlation line.

Vin (LSBideal)

ADC Analog to Digital Converter (8-bit)

Symbol

Parameter

Conditions

|TUE|

OE

GE

|DLE|

|ILE|

VAIN

IADC

tSTAB

tLOAD

Total unadjusted error*

Offset error*

Gain Error*

Differential linearity error*

Integral linearity error*

Conversion range voltage

A/D conversion supply current

Stabilization time after enable ADC

Sample capacitor loading time

fADC=fCPU=4MHz

VDD=VDDA=5V

fADC=fCPU=4MHz

VDD=VDDA=5V

tCONV Hold conversion time

RAIN

External input resistor

RADC Internal input resistor

CSAMPLE Sample capacitor

Min

Typ

-1

-2

VSSA

1

8

32

8

32

Max

2

1

2

1

2

VDDA

30

20

18

22

Unit

LSB

V

mA

µs

µs

1/fADC

µs

1/fADC

ΚΩ

ΚΩ

pF

*Note: 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

by 10KΩ increase of the external analog source impedance.

These measurements results and recommandations are done in the worst condition of injection:

- negative injection

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

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

102/109

Share Link: