參數資料
型號: ADV7178
廠商: Analog Devices, Inc.
英文描述: Integrated Digital CCIR-601 to PAL/NTSC Video Encoder
中文描述: 綜合數字無線電咨詢委員會,601到PAL / NTSC制式視頻編碼器
文件頁數: 9/38頁
文件大?。?/td> 280K
代理商: ADV7178
ADV7177/ADV7178
–9–
REV. 0
ABSOLUTE MAXIMUM RATINGS
1
V
AA
to GND . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7 V
Voltage on Any Digital Input Pin . . GND – 0.5 V to V
AA
+ 0.5 V
Storage Temperature (T
S
) . . . . . . . . . . . . . . –65
°
C to +150
°
C
Junction Temperature (T
J
) . . . . . . . . . . . . . . . . . . . . . . +150
°
C
Lead Temperature (Soldering, 10 sec) . . . . . . . . . . . . . +260
°
C
Analog Outputs to GND
2
. . . . . . . . . . . . . . GND – 0.5 to V
AA
NOTES
1
Stresses above those listed under Absolute Maximum Ratings may cause permanent
damage to the device. This is a stress rating only; functional operation of the device
at these or any other conditions above those listed in the operational sections of this
specification is not implied. Exposure to absolute maximum rating conditions for
extended periods may affect device reliability.
2
Analog output short circuit to any power supply or common can be of an indefinite
duration.
ORDERING GUIDE
Temperature Package
Range
Package
Option
Model
Description
ADV7178KS
ADV7177KS
0
°
C to +70
°
C
0
°
C to +70
°
C
Plastic Quad Flatpack S-44
Plastic Quad Flatpack S-44
CAUTION
ESD (electrostatic discharge) sensitive device. Electrostatic charges as high as 4000 V readily
accumulate on the human body and test equipment and can discharge without detection.
Although the ADV7177/ADV7178 feature proprietary ESD protection circuitry, permanent
damage may occur on devices subjected to high energy electrostatic discharges. Therefore, proper
ESD precautions are recommended to avoid performance degradation or loss of functionality.
PIN CONFIGURATION
12 13 14 15 16 17 18 19 20 21 22
3
4
5
6
7
1
2
10
11
8
9
40 39 38
41
42
43
44
36 35 34
37
29
30
31
32
27
28
25
26
23
24
33
PIN 1
R
SET
V
REF
DAC A
V
AA
GND
V
AA
DAC B
B
P
F
V
A
V
AA
CLOCK/2
P5
P6
P7
P8
P9
P10
P11
P12
OSD_EN
DAC C
COMP
SDATA
SCLOCK
G
V
A
G
R
C
C
G
P
P
P
P
P
O
O
O
ADV7177/ADV7178
PQFP
TOP VIEW
(Not to Scale)
PACKAGE THERMAL PERFORMANCE
The 44-lead PQFP package used for this device has a junction-
to-ambient thermal resistance (
θ
JA
) in still air on a four-layer
PCB of 53.2
°
C/W. The junction-to-case thermal resistance (
θ
JC
)
is 18.8
°
C/W.
Care must be taken when operating the part in certain condi-
tions to prevent overheating. Table I illustrates what conditions
are to be used when using the part.
Table I. Allowable Operating Conditions for ADV7177/
ADV7178 in 44-Lead PQFP Package
Condition
3 DACs ON, Double 75R
1
3 DACs ON, Low Power
2
3 DACs ON, Buffered
3
2 DACs ON, Double 75R
2 DACs ON, Low Power
2 DACs ON, Buffered
5 V
3 V
No
Yes
Yes
No
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
NOTES
1
DAC ON, Double 75R refers to a condition where the DACs are terminated
into a double 75R load and low power mode is disabled.
2
DAC ON, Low Power refers to a condition where the DACs are terminated in a
double 75R load and low power mode is enabled.
3
DAC ON, Buffered refers to a condition where the DAC current is reduced to
5 mA and external buffers are used to drive the video loads.
WARNING!
ESD SENSITIVE DEVICE
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