AN2021 datasheet(13/39 Pages) STMICROELECTRONICS

номер детали	AN2021

подробное описание детали	The ST10F272B and ST10F272E are members of the STMicroelectronics

PDF	39 Pages

Scroll/Zoom	100%

производитель	STMICROELECTRONICS [STMicroelectronics]

домашняя страница	http://www.st.com

Logo

13 / 39 page

AN2021

Modified features

13/39

In the default configuration the sample time of the ST10F272 is 2.5 times longer compared

to that of the ST10F269. This has an impact on the frequency of the input signal that can be

applied to the ST10F272.

1.4.2

Hardware impact: electrical characteristics

Table 6 lists the differences in the DC characteristics of the two devices.

Table 5.

ST10F272 vs ST10F269 sample time comparison table

ADCTC

ADSTC

ST10F269

Sample time

ST10F272

Sample time

Ratio

F272E_time / F269_time

TCL * 48

TCL * 120

2.5

TCL * 96

TCL * 140

1.46

TCL * 192

TCL * 200

1.04

TCL * 384

TCL * 400

1.04

TCL * 96

TCL * 240

2.5

TCL * 192

TCL * 280

1.46

TCL * 384

TCL * 400

1.04

TCL * 768

TCL * 800

1.04

TCL * 192

TCL * 480

2.08

TCL * 384

TCL * 560

1.46

TCL * 768

TCL * 800

1.04

TCL * 1536

TCL * 1600

1.04

Table 6.

ADC differences

Symbol

Parameter

Limit values for ST10F269

Limit values for ST10F272

Unit

Min

Max

Min

Max

VAREF

Analog reference

voltage

4.0

VDD + 0.1

4.5

VDD

VAIN

Analog input voltage

VAGND

VAREF

VAGND

VAREF

CAIN

ADC input capacitance

(Port 5)

Not sampling

Sampling

CP1 + CP2 +CS

10.5

Sample time

48TCL

1536TCL

1µs

120TCL

1600TCL

Conversion time

388TCL

2884TCL

388TCL

2884TCL

TUE

Total Unadjusted Error

(Port5)

-2.0

+2.0

-2.0

+2.0

LSB

RASRC

Internal resistance of

analog source

tS[ns]/150 -0.25

Ω

AN2021 датащи(PDF) 13 Page - STMicroelectronics

AN2021 датащи(HTML) 13 Page - STMicroelectronics

Html Pages

1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39

датащи скачать

ссылки URL