AD9235BCP-20 datasheet(6/32 Pages) AD

Part #	AD9235BCP-20

Description	12-Bit, 20/40/65 MSPS 3 V A/D Converter

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REV. B

AD9235

–6–

PIN CONFIGURATION

28-Lead TSSOP

32-Lead LFCSP

PIN 1

INDICATOR

TOP VIEW

(Not to Scale)

24 VREF

23 SENSE

22 MODE

21 OTR

DNC 1

CLK 2

DNC 3

20 D11(MSB)

19 D10

18 D9

17 D8

PDWN 4

DNC 5

DNC 6

(LSB)D0 7

D1 8

AD9235

PIN FUNCTION DESCRIPTIONS

Pin Number

Mnemonic

Description

28-Lead

32-Lead

TSSOP

LFCSP

121

OTR

Out-of-Range Indicator.

222

MODE

Data Format and Clock Duty Cycle Stabilizer (DCS) Mode Selection.

323

SENSE

Reference Mode Selection.

424

VREF

Voltage Reference Input/Output.

525

REFB

Differential Reference (–).

626

REFT

Differential Reference (+).

7, 12

27, 32

AVDD

Analog Power Supply.

8, 11

28, 31

AGND

Analog Ground.

929

VIN+

Analog Input Pin (+).

10

30

VIN–

Analog Input Pin (–).

13

2

CLK

Clock Input Pin.

14

4

PDWN

Power-Down Function Selection (Active High).

15–22,

7-14,

D0 (LSB)–D11(MSB)

Data Output Bits.

25–28

17-20

23

15

DGND

Digital Output Ground.

24

16

DRVDD

Digital Output Driver Supply. Must be decoupled to DGND with a minimum

0.1

µF capacitor. Recommended decoupling is 0.1 µF in parallel with 10 µF.

1, 3, 5, 6

DNC

Do Not Connect.

1

2

3

4

5

6

7

8

9

10

11

12

13

14

OTR

MODE

SENSE

VREF

REFB

REFT

AVDD

AGND

VIN+

VIN–

AGND

AVDD

CLK

PDWN

D11 (MSB)

D10

D9

D8

DRVDD

DGND

D7

D6

D5

D4

D3

D2

D1

D0 (LSB)

28

27

26

25

24

23

22

21

20

19

18

17

16

15

AD9235

TOP VIEW

(Not to Scale)

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AD9235BCP-20 Datasheet(PDF) 6 Page - Analog Devices

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