AD9879_05 datasheet(8/32 Pages) AD

Part #	AD9879

Description	Mixed-Signal Front End Set-Top Box, Cable Modem

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Manufacturer	AD [Analog Devices]

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AD9879

Rev. A | Page 8 of 32

PIN CONFIGURATION AND FUNCTION DESCRIPTIONS

2

DRGND

3

DRVDD

4

IF(11)

7

IF(8)

6

IF(9)

5

IF(10)

1

DNC

8

IF(7)

9

IF(6)

10

IF(5)

12

IF(3)

13

IF(2)

14

IF(1)

15

IF(0)

16

RXIQ(3)

17

RXIQ(2)

18

RXIQ(1)

19

RXIQ(0)

20

RXSYNC

21

DRGND

22

DRVDD

23

MCLK

24

DVDD

25

DGND

26

TXSYNC

27

TXIQ(5)

28

TXIQ(4)

29

TXIQ(3)

30

TXIQ(2)

11

IF(4)

79

I+

78

I–

77

DNC

74

AGNDIQ

75

DNC

76

DNC

80

DNC

73

AVDDIQ

72

DRVDD

71

REFCLK

69

DGND

Σ-∆

68

Σ-∆_OUT

67

FLAG1

66

DVDD

Σ-∆

65

CA_EN

64

CA_DATA

63

CA_CLK

62

DVDDOSC

61

OSCIN

60

XTAL

59

DGNDOSC

58

AGNDPLL

57

PLLFILT

56

AVDDPLL

55

DVDDPLL

54

DGNDPLL

53

AVDDTX

52

TX+

51

TX–

70

DRGND

PIN 1

AD9879

TOP VIEW

(Pins Down)

Figure 2. Pin Configuration

Table 3. Pin Function Descriptions

Pin No.

Mnemonic

Description

1, 35, 75 to 77, 80

DNC

Do Not Connect. Pins are not bonded to die.

2, 21, 70

DRGND

Pin Driver Digital Ground.

3, 22, 72

DRVDD

Pin Driver Digital 3.3 V Supply.

4 to 15

IF[11:0]

12-Bit ADC Digital Output.

16 to 19

RXIQ[3:0]

Muxed I and Q ADCs Output.

20

RXSYNC

Sync Output, IF, I and Q ADCs.

23

MCLK

Master Clock Output.

24, 33, 38

DVDD

Digital 3.3 V Supply.

25, 34, 39, 40

DGND

Digital Ground.

26

TXSYNC

Sync Input for Transmit Port.

27 to 32

TXIQ[5:0]

Digital Input for Transmit Port.

36

PROFILE

Profile Selection Inputs.

37

RESET

Chip Reset Input (Active Low).

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