Preliminary Technical Data
AD9779
Rev. PrD | Page 5 of 34
PIN FUNCTION DESCRIPTIONS
Pin
No.
Name Description
Pin
No.
Name Description
1
VDDC18
1.8 V Clock Supply
51
P2D<6>
Port 2 Data Input D6
2
VDDC18
1.8 V Clock Supply
52
P2D<5>
Port 2 Data Input D5
3
VSSC
Clock Common
53
VDDD18
1.8 V Digital Supply
4
VSSC
Clock Common
54
VSSD
Digital Common
5
CLK+
Differential Clock Input
55
P1D<4>
Port 2 Data Input D4
6
CLK-
Differential Clock Input
56
P1D<3>
Port 2 Data Input D3
7
VSSC
Clock Common
57
P1D<2>
Port 2 Data Input D2
8
VSSC
Clock Common
58
P1D<1>
Port 2 Data Input D1
9
VDDC18
1.8 V Clock Supply
59
P1D<0>
Port 2 Data Input D0 (LSB)
10
VDDC18
1.8 V Clock Supply
60
VDDD18
1.8 V Digital Supply
11
VSSC
Clock Common
61
VDDD33
3.3 V Digital Supply
12 VSSC
Clock
Common
62
SYNC_O-
Differential Synchronization Output
13
Differential Synchronization Input
63
Differential
Synchronization
Output
14 SYNC_I-
Differential
Synchronization Input
64
VSSD
Digital Common
15
VSSD
Digital Common
65
PLL_LOCK
PLL Lock Indicator
16
VDDD33
3.3 V Digital Supply
66
SPI_SDO
SPI Port Data Output
17
P1D<15>
Port 1 Data Input D15 (MSB)
67
SPI_SDIO
SPI Port Data Input/Output
18
P1D<14>
Port 1 Data Input D14
68
SPI_CLK
SPI Port Clock
19
P1D<13>
Port 1 Data Input D13
69
SPI_CSB
SPI Port Chip Select Bar
20
P1D<12>
Port 1 Data Input D12
70
RESET
Reset
21
P1D<11>
Port 1 Data Input D11 71
IRQ
Interrupt
Request
22
VSSD
Digital Common
72
VSS
Analog Common
23
VDDD18
1.8 V Digital Supply
73
IPTAT
Reference Current
24
P1D<10>
Port 1 Data Input D10
74
VREF
Voltage Reference Output
25
P1D<9>
Port 1 Data Input D9
75
I120
120
µ
A Reference Current
26
P1D<8>
Port 1 Data Input D8
76
VDDA33
3.3 V Analog Supply
27
P1D<7>
Port 1 Data Input D7
77
VSSA
Analog Common
28
P1D<6>
Port 1 Data Input D6
78
VDDA33
3.3 V Analog Supply
29
P1D<5>
Port 1 Data Input D5
79
VSSA
Analog Common
30
P1D<4>
Port 1 Data Input D4
80
VDDA33
3.3 V Analog Supply
31
P1D<3>
Port 1 Data Input D3
81
VSSA
Analog Common
32
VSSD
Digital Common
82
VSSA
Analog Common
33
VDDD18
1.8 V Digital Supply
83
IOUT2_P
Differential DAC Current Output, Channel 2
34
P1D<2>
Port 1 Data Input D2
84
IOUT2_N
Differential DAC Current Output, Channel 2
35
P1D<1>
Port 1 Data Input D1
85
VSSA
Analog Common
36
P1D<0>
Port 1 Data Input D0 (LSB)
86
AUX2_P
Auxiliary DAC Voltage Output, Channel 2
37
DATACLK_OUT
Data Clock Output
87
AUX2_N
Auxiliary DAC Voltage Output, Channel 2
38
VDDD33
3.3 V Digital Supply
88
VSSA
Analog Common
39 TXENABLE
Transmit
Enable
89
AUX1_N
Auxiliary DAC Voltage Output, Channel 1
40
P2D<15>
Port 2 Data Input D15 (MSB)
90
AUX1_P
Auxiliary DAC Voltage Output, Channel 1
41
P2D<14>
Port 2 Data Input D14
91
VSSA
Analog Common
42
P2D<13>
Port 2 Data Input D13
92
IOUT1_N
Differential DAC Current Output, Channel 1
43
VDDD18
1.8 V Digital Supply
93
IOUT1_P
Differential DAC Current Output, Channel 1
44
VSSD
Digital Common
94
VSSA
Analog Common
45
P2D<12>
Port 2 Data Input D12
95
VSSA
Analog Common
46
P2D<11>
Port 2 Data Input D11
96
VDDA33
3.3 V Analog Supply
47
P2D<10>
Port 2 Data Input D10
97
VSSA
Analog Common
48
P2D<9>
Port 2 Data Input D9
98
VDDA33
3.3 V Analog Supply
49
P2D<8>
Port 2 Data Input D8
99
VSSA
Analog Common
50
P2D<7>
Port 2 Data Input D7
100
VDDA33
3.3 V Analog Supply
Table 4: Pin Function Descriptions
