AD9280-EB datasheet(11/25 Pages) AD

номер детали	AD9280-EB

подробное описание детали	CMOS A/D Converter

PDF	25 Pages

Scroll/Zoom	100%

производитель	AD [Analog Devices]

домашняя страница	http://www.analog.com

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AD9280

–10–

10k

A/D

CORE

4.2k

TOTAL

REFTS

REFBS

10 F

0.1 F

REFTF

REFBF

0.1 F

AIN

+F/S RANGE

OBTAINED FROM

VREF PIN OR

EXTERNAL REF

–F/S RANGE

OBTAINED FROM

VREF PIN OR

EXTERNAL REF

0.1 F

MODE

(AVDD)

+FS

–FS

AD9280

10k

SHA

a. Top/Bottom Mode

MAXIMUM MAGNITUDE OF V

IS DETERMINED BY INTERNAL

REFERENCE AND TURNS RATIO

MODE

INTERNAL

REF

AVDD/2

10k

A/D

CORE

4.2k

TOTAL

10 F

0.1 F

REFTF

REFBF

0.1 F

AIN

0.1 F

AD9280

10k

REFTS

REFBS

AVDD/2

SHA

c. Differential Mode

AVSS

REFSENSE

VREF

(1V)

AD9280

0.1 F

1.0 F

d. 1 V Reference

AVSS

REFSENSE

VREF

(= 1 + RA/RB)

INTERNAL 10K REF RESISTORS ARE

SWITCHED OPEN BY THE PRESENSE

OF RA AND RB.

AD9280

0.1 F

1.0 F

f. Variable Reference

(Between 1 V and 2 V)

10k

AVSS

REFSENSE

VREF

(2V)

AD9280

0.1 F

1.0 F

e. 2 V Reference

REFSENSE

AVDD

VREF

AD9280

g. Internal Reference Disable

(Power Reduction)

Figure 16.

MODE

INTERNAL

REF

MIDSCALE OFFSET

VOLTAGE IS DERIVED

FROM INTERNAL OR

EXTERNAL REF

MIDSCALE

AVDD/2

* MAXIMUM MAGNITUDE OF V IS DETERMINED

BY INTERNAL REFERENCE

10k

A/D

CORE

4.2k

TOTAL

REFTS

REFBS

10 F

0.1 F

REFTF

REFBF

0.1 F

AIN

0.1 F

AD9280

10k

SHA

b. Center Span Mode

REV. E

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