AD9879 Analog Devices, AD9879 Datasheet - Page 8

• Manufacturer Part Number: AD9879
• Description: Mixed Signal Front End Set Top Box, Cable Modem (MxFE®)
• Manufacturer: Analog Devices

Specifications of AD9879

• Resolution (bits): 12bit
• # Chan: 5
• Sample Rate: 29MSPS
• Interface: Par
• Analog Input Type: Diff-Uni
• Ain Range: 2 V p-p
• Adc Architecture: Pipelined
• Pkg Type: QFP

AD9879
PIN CONFIGURATION AND FUNCTION DESCRIPTIONS
Table 3. Pin Function Descriptions
Pin No.
1, 35, 75 to 77, 80
2, 21, 70
3, 22, 72
4 to 15
16 to 19
20
23
24, 33, 38
25, 34, 39, 40
26
27 to 32
36
37
RXSYNC
TXSYNC
DRGND
RXIQ(3)
RXIQ(2)
RXIQ(1)
RXIQ(0)
DRGND
DRVDD
DRVDD
TXIQ(5)
TXIQ(4)
TXIQ(3)
TXIQ(2)
DGND
MCLK
DVDD
IF(11)
IF(10)
DNC
IF(9)
IF(8)
IF(7)
IF(6)
IF(5)
IF(4)
IF(3)
IF(2)
IF(1)
IF(0)
Mnemonic
DNC
DRGND
DRVDD
IF[11:0]
RXIQ[3:0]
RXSYNC
MCLK
DVDD
DGND
TXSYNC
TXIQ[5:0]
PROFILE
RESET
12
10
11
13
14
15
16
18
19
20
22
23
25
27
28
30
17
21
24
26
29
1
2
3
4
5
6
7
8
9
PIN 1
Figure 2. Pin Configuration
Description
Do Not Connect. Pins are not bonded to die.
Pin Driver Digital Ground.
Pin Driver Digital 3.3 V Supply.
12-Bit ADC Digital Output.
Muxed I and Q ADCs Output.
Sync Output, IF, I and Q ADCs.
Master Clock Output.
Digital 3.3 V Supply.
Digital Ground.
Sync Input for Transmit Port.
Digital Input for Transmit Port.
Profile Selection Inputs.
Chip Reset Input (Active Low).
Rev. A | Page 8 of 32
(Pins Down)
TOP VIEW
AD9879
70
69
68
67
66
80
79
78
77
76
75
74
73
72
71
65
64
63
62
61
60
59
58
57
56
55
54
53
52
51
DNC
I+
I–
DNC
DNC
DNC
AGNDIQ
AVDDIQ
DRVDD
REFCLK
DRGND
DGND Σ-∆
FLAG1
DVDD Σ-∆
CA_EN
CA_DATA
CA_CLK
DVDDOSC
OSCIN
XTAL
DGNDOSC
AGNDPLL
PLLFILT
AVDDPLL
DVDDPLL
DGNDPLL
AVDDTX
TX+
TX–
Σ-∆_OUT