Datasheet
AD9122
Rev. B | Page 9 of 60
PIN CONFIGURATION AND FUNCTION DESCRIPTIONS
08281-003
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
CVDD18
DACCLKP
DACCLKN
CVSS
FRAMEP
FRAMEN
IRQ
D15P
D15N
NC
IOVDD
DVDD18
D14P
D14N
D13P
D13N
17D12P
18D12N
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
D11P
D11N
D10P
D10N
D9P
D9N
D8P
D8N
DCIP
DCIN
DVDD18
DVSS
D7P
D7N
D6P
D6N
35D5P
36D5N
54
53
52
51
50
49
48
47
46
45
44
43
42
41
40
39
38
37
RESET
CS
SCLK
SDIO
SDO
DVDD18
D0N
D0P
D1N
D1P
DVSS
DVDD18
D2N
D2P
D3N
D3P
D4N
D4P
72
71
70
69
68
67
66
65
64
63
62
61
60
59
58
57
56
55
CVDD18
CVDD18
REFCLKP
REFCLKN
AVDD33
IOUT1P
IOUT1N
AVDD33
AVSS
FSADJ
REFIO
AVSS
AVDD33
IOUT2N
IOUT2P
AVDD33
AVSS
NC
PIN 1
INDICATOR
AD9122
TOP VIEW
(Not to Scale)
NOTES
1. EXPOSED PAD (EPAD) MUST BE SOLDERED TO THE GROUND PLANE (AVSS).
THE EPAD PROVIDES AN ELECTRICAL, THERMAL, AND MECHANICAL
CONNECTION TO THE BOARD.
2. NC = NO CONNECT. DO NOT CONNECT TO THIS PIN.
Figure 3. Pin Configuration
Table 8. Pin Function Descriptions
Pin No. Mnemonic Description
1 CVDD18 1.8 V Clock Supply. Supplies clock receivers, clock distribution, and PLL circuitry.
2 DACCLKP DAC Clock Input, Positive.
3 DACCLKN DAC Clock Input, Negative.
4 CVSS Clock Supply Common.
5 FRAMEP Frame Input, Positive. This pin must be tied to DVSS if not used.
6 FRAMEN Frame Input, Negative. This pin must be tied to DVDD18 if not used.
7
IRQ
Interrupt Request. Open-drain, active low output. Connect an external pull-up to IOVDD through a 10 kΩ
resistor.
8 D15P Data Bit 15 (MSB), Positive.
9 D15N Data Bit 15 (MSB), Negative.
10 NC No Connect. Do not connect to this pin.
11 IOVDD
Supply Pin for Serial Port I/O Pins, RESET
, and IRQ. 1.8 V to 3.3 V can be supplied to this pin.
12 DVDD18 1.8 V Digital Supply. Supplies power to digital core and digital data ports.
13 D14P Data Bit 14, Positive.
14 D14N Data Bit 14, Negative.
15 D13P Data Bit 13, Positive.
16 D13N Data Bit 13, Negative.
17 D12P Data Bit 12, Positive.
18 D12N Data Bit 12, Negative.
19 D11P Data Bit 11, Positive.
20 D11N Data Bit 11, Negative.
21 D10P Data Bit 10, Positive.
22 D10N Data Bit 10, Negative.
23 D9P Data Bit 9, Positive.
24 D9N Data Bit 9, Negative.