HMP8116 Intersil Corporation, HMP8116 Datasheet - Page 38

• Manufacturer Part Number: HMP8116
• Description: Ntsc/pal Video Decoder
• Manufacturer: Intersil Corporation

Pinout
Applications Information
PCB LAYOUT CONSIDERATIONS
A PCB board with a minimum of 4 layers is recommended, with
layers 1 and 4 (top and bottom) for signals and layers 2 and 3
for power and ground. The PCB layout should implement the
lowest possible noise on the power and ground planes by pro-
viding excellent decoupling.
The optimum layout places the HMP8116 as close as possible
to the power supply connector and the video input connector.
Component Placement
External components should be positioned as close as pos-
sible to the appropriate pin, ideally such that traces can be
connected point to point. Chip capacitors are recommended
where possible, with radial lead ceramic capacitors the sec-
ond-best choice.
Power supply decoupling should be done using a 0.1 F
ceramic capacitor in parallel with a 0.01 F chip capacitor for
A/D_TEST
CVBS3(Y)
CVBS2
CVBS1
AGND
AGND
AGND
AGND
AGND
AGND
YOUT
VAA
VAA
VAA
YIN
NC
NC
NC
NC
C
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25 26 27 28 29 30 31 32 33 34 35 36
80
79
78
77
76
80 LEAD PQFP
75
HMP8116
TOP VIEW
74
73
38
72
each group of V
tors should be located as close to the power and ground pins
as possible, using short, wide traces.
Digital Ground Plane
All GND pins on the HMP8116 should be connected to the
digital ground plane of the board.
Analog Ground Plane
A separate analog ground plane for the HMP8116 is recom-
mended. All AGND pins on the HMP8116 should be con-
nected to the analog ground plane. This analog ground
plane should be connected to the board’s digital ground
plane at a single point.
Analog Power Plane
The HMP8116 should have its own V
isolated from the common power plane of the board, with a
gap between the two power planes of at least 1/8 inch. All
V
71
AA
70
pins on the HMP8116 must be connected to this analog
69
37 38 39 40
68
67
66
65
AA
64
63
62
61
60
59
58
57
56
55
54
53
52
51
50
49
48
47
46
45
44
43
42
41
and V
P13
VCC
P12
P11
P10
P9
P8
GND
VCC
P7
P6
P5
P4
P3
GND
P2
INTREQ
P1
P0
SCL
CC
pins to ground. These capaci-
AA
power plane that is