Datasheet
AD9648
Rev. 0 | Page 15 of 44
PIN 1
INDICATOR
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
D4–
D4+
DRVDD
D5–
D5+
D6–
D6+
DCO–
DCO+
D7–
D7+
DRVDD
D8–
D8+
D9–
D9+
64
63
62
61
60
59
58
57
56
55
54
53
52
51
50
49
AVDD
AVDD
VIN+B
VIN–B
AVDD
AVDD
RBIAS
VCM
SENSE
VREF
AVDD
AVDD
VIN–A
VIN+A
AVDD
AVDD
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
CLK+
CLK–
SYNC
NC
NC
NC
NC
D0– (LSB)
D0+ (LSB)
DRVDD
D1–
D1+
D2–
D2+
D3–
D3+
PDWN
OEB
CSB
SCLK/DFS
SDIO/DCS
OR+
OR–
D13+ (MSB)
D13– (MSB)
D12+
D12–
DRVDD
D11+
D11–
D10+
D10–
48
47
46
45
44
43
42
41
40
39
38
37
36
35
34
33
AD9648
INTERLEAVED PARALLEL LVDS
TOP VIEW
(Not to Scale)
NOTES
1. NC = NO CONNECT. DO NOT CONNECT TO THIS PIN.
2. THE EXPOSED THERMAL PAD ON THE BOTTOM OF THE PACKAGE PROVIDES
THE ANALOG GROUND FOR THE PART. THIS EXPOSED PAD MUST BE
CONNECTED TO GROUND FOR PROPER OPERATION.
09975-007
Figure 7. Interleaved Parallel LVDS Pin Configuration (Top View)
Table 9. Pin Function Descriptions (Interleaved Parallel LVDS Mode)
Pin No. Mnemonic Type Description
ADC Power Supplies
10, 19, 28, 37 DRVDD Supply Digital Output Driver Supply (1.8 V Nominal).
49, 50, 53, 54,
59, 60, 63, 64
AVDD Supply Analog Power Supply (1.8 V Nominal).
4, 5, 6, 7 NC No Connect. Do not connect to these pins.
0 AGND,
Exposed Pad
Ground The exposed thermal pad on the bottom of the package provides the analog ground for
the part. This exposed pad must be connected to ground for proper operation.
ADC Analog
51 VIN+A Input Differential Analog Input Pin (+) for Channel A.
52 VIN−A Input Differential Analog Input Pin (−) for Channel A.
62 VIN+B Input Differential Analog Input Pin (+) for Channel B.
61 VIN−B Input Differential Analog Input Pin (−) for Channel B.
55 VREF Input/Output Voltage Reference Input/Output.
56 SENSE Input Reference Mode Selection.
58 RBIAS Input/Output External Reference Bias Resistor.
57 VCM Output Common-Mode Level Bias Output for Analog Inputs.
1 CLK+ Input ADC Clock Input—True.
2 CLK− Input ADC Clock Input—Complement.
Digital Input
3 SYNC Input Digital Synchronization Pin. Slave mode only.
Digital Outputs
9 D0+ (LSB) Output Channel A/Channel B LVDS Output Data 0—True.
8 D0− (LSB) Output Channel A/Channel B LVDS Output Data 0—Complement.
12 D1+ Output Channel A/Channel B LVDS Output Data 1—True.
11 D1− Output Channel A/Channel B LVDS Output Data 1—Complement.