Datasheet
AD9481
Rev. 0 | Page 9 of 28
PIN CONFIGURATION AND FUNCTION DESCRIPTIONS
1
2
3
4
5
6
7
8
9
10
11
12
CLK–
AVDD
AGND
D7A (MSB)
DRGND
DRVDD
CLK+
D6A
D5A
D4A
D3A
33
32
31
30
29
28
27
26
25
24
23
AGND
AVDD
AVDD
DRGND
S1
PDWN
SENSE
D7B (MSB)
D6B
D5B
D4B
D2A
13
D1A
14
D0A (LSB)
15
DRGND
16
DCO–
17
DCO+
18
DRVDD
19
D0B (LSB)
20
D1B
21
D2B
22
D3B
PIN 1
44
DS+
43
DS–
42
S3
41
AVDD
40
AGND
39
VIN+
38
VIN–
37
AGND
36
AVDD
35
AGND
34
VREF
AD9481
TOP VIEW
(Not to Scale)
05045-003
Figure 3. Pin Configuration
Table 7. Pin Function Descriptions
Pin
No. Name Description
1 CLK+ Input Clock—True
2 CLK− Input Clock—Complement
3 AVDD 3.3 V Analog Supply
4 AGND Analog Ground
5 DRVDD 3.3 V Digital Output Supply
6 DRGND Digital Ground
7 D7A Data Output Bit 7—Channel A (MSB)
8 D6A Data Output Bit 6—Channel A
9 D5A Data Output Bit 5—Channel A
10 D4A Data Output Bit 4—Channel A
11 D3A Data Output Bit 3—Channel A
12 D2A Data Output Bit 2—Channel A
13 D1A Data Output Bit 1—Channel A
14 D0A Data Output Bit 0—Channel A (LSB)
15 DRGND Digital Ground
16 DCO− Data Clock Output—Complement
17 DCO+ Data Clock Output—True
18 DRVDD 3.3 V Digital Output Supply
19 D0B Data Output Bit 0—Channel B (LSB)
20 D1B Data Output Bit 1—Channel B
21 D2B Data Output Bit 2—Channel B
22 D3B Data Output Bit 3—Channel B
23 D4B Data Output Bit 4—Channel B
24 D5B Data Output Bit 5—Channel B
Pin
No. Name Description
25 D6B Data Output Bit 6—Channel B
26 D7B Data Output Bit 7—Channel B (MSB)
27 DRGND Digital Ground
28 S1
Data Format Select and Duty Cycle Stabilizer
Select
29 PDWN Power-Down Selection
30 AVDD 3.3 V Analog Supply
31 AVDD 3.3 V Analog Supply
32 AGND Analog Ground
33 SENSE Reference Mode Selection
34 VREF Voltage Reference Input/Output
35 AGND Analog Ground
36 AVDD 3.3 V Analog Supply
37 AGND Analog Ground
38 VIN− Analog Input—Complement
39 VIN+ Analog Input—True
40 AGND Analog Ground
41 AVDD 3.3 V Analog Supply
42 S3
DCO Enable Select (Tie to AVDD for DCO
Active)
43 DS−
Data Sync Complement (If Unused, Tie to
DRVDD)
44 DS+ Data Sync True (If Unused, Tie to DGND)