AD9257 查看數據表（PDF） - Analog Devices

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AD9257

Octal, 14-Bit, 40/65 MSPS, Serial LVDS, 1.8 V Analog-to-Digital Converter

Analog Devices 

Data Sheet

PIN CONFIGURATION AND FUNCTION DESCRIPTIONS

PIN 1

INDICATOR

AVDD 1

VIN+ G 2

VIN– G 3

AVDD 4

VIN– H 5

VIN+ H 6

AVDD 7

AVDD 8

CLK– 9

CLK+ 10

AVDD 11

AVDD 12

DNC 13

DRVDD 14

D– H 15

D+ H 16

AD9257

TOP VIEW

(Not to Scale)

48 AVDD

47 VIN+ B

46 VIN– B

45 AVDD

44 VIN– A

43 VIN+ A

42 AVDD

41 PDWN

40 CSB

39 SDIO/DFS

38 SCLK/DTP

37 AVDD

36 DNC

35 DRVDD

34 D+ A

33 D– A

AD9257

NOTES

1. DNC = DO NOT CONNECT. DO NOT CONNECT TO THIS PIN.

2. THE EXPOSED PAD MUST BE CONNECTED TO ANALOG GROUND.

Figure 5. Pin Configuration, Top View

Table 8. Pin Function Descriptions

Pin No.

Mnemonic

0, EP

AGND, Exposed Pad

1, 4, 7, 8, 11, 12, 37,

42, 45, 48, 51, 59, 62

13, 36

14, 35

2, 3

5, 6

9, 10

15, 16

17, 18

19, 20

21, 22

23, 24

25, 26

27, 28

29, 30

31, 32

33, 34

38

39

40

41

43, 44

46, 47

49, 50

52, 53

AVDD

DNC

DRVDD

VIN+ G, VIN− G

VIN− H, VIN+ H

CLK−, CLK+

D− H, D+ H

D− G, D+ G

D− F, D+ F

D− E, D+ E

DCO−, DCO+

FCO−, FCO+

D− D, D+ D

D− C, D+ C

D− B, D + B

D− A, D+ A

SCLK/DTP

SDIO/DFS

CSB

PDWN

VIN+ A, VIN− A

VIN− B, VIN+ B

VIN+ C, VIN− C

VIN− D, VIN+ D

Description

Analog Ground, Exposed Pad. The exposed thermal pad on the bottom of the package

provides the analog ground for the part. This exposed pad must be connected to ground

for proper operation.

1.8 V Analog Supply.

Do Not Connect.

1.8 V Digital Output Driver Supply.

ADC G Analog Input True, ADC G Analog Input Complement.

ADC H Analog Input Complement, ADC H Analog Input True.

Input Clock Complement, Input Clock True.

ADC H Digital Output Complement, ADC H Digital Output True.

ADC G Digital Output Complement, ADC G Digital Output True.

ADC F Digital Output Complement, ADC F Digital Output True.

ADC E Digital Output Complement, ADC E Digital Output True.

Data Clock Digital Output Complement, Data Clock Digital Output True.

Frame Clock Digital Output Complement, Frame Clock Digital Output True.

ADC D Digital Output Complement, ADC D Digital Output True.

ADC C Digital Output Complement, ADC C Digital Output True.

ADC B Digital Output Complement, ADC B Digital Output True.

ADC A Digital Output Complement, ADC A Digital Output True.

Serial Clock (SCLK)/Digital Test Pattern (DTP).

Serial Data Input/Output (SDIO)/Data Format Select (DFS).

Chip Select Bar.

Power-Down.

ADC A Analog Input True, ADC A Analog Input Complement.

ADC B Analog Input Complement, ADC B Analog Input True.

ADC C Analog Input True, ADC C Analog Input Complement.

ADC D Analog Input Complement, ADC D Analog Input True.

Rev. A | Page 9 of 40

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