欧美成人免费电影,国产欧美一区二区三区精品酒店,精品国产a毛片,色网在线免费观看

參數資料
型號: AD9876BSTRL
廠商: ANALOG DEVICES INC
元件分類: 通信及網絡
英文描述: Broadband Modem Mixed-Signal Front End
中文描述: SPECIALTY TELECOM CIRCUIT, PQFP48
封裝: LQFP-48
文件頁數: 24/24頁
文件大小: 666K
代理商: AD9876BSTRL
REV. A
–24–
C
P
AD9876
on the MxFE side of the ferrite as well as a low ESR, ESL
decoupling capacitors on each supply pin (i.e., the AD9876
requires five power supply decoupling caps, one each on Pins 5,
38, 47, 14, and 35). The decoupling caps should be placed as close
to the MxFE supply pins as possible. An example of the proper
decoupling is shown in the AD9876 evaluation board schematic.
Ground Planes
In general, if the component placing guidelines discussed earlier
can be implemented, it is best to have at least one continuous
ground plane for the entire board. All ground connections should be
made as short as possible. This will result in the lowest impedance
return paths and the quietest ground connections.
If the components cannot be placed in a manner that will keep the
high frequency ground currents from traversing under the MxFE
and analog components, it may be necessary to put current steering
channels into the ground plane to route the high frequency
currents around these sensitive areas. These current
steering
channels should be made only when and where necessary.
Signal Routing
The digital Rx and Tx signal paths should be kept as short as
possible. Also, the impedance of these traces should have
a controlled characteristic impedance of about 50
. This will
prevent poor signal integrity and the high currents that can
occur during undershoot or overshoot caused by ringing. If the
signal traces cannot be kept shorter than about 1.5 inches, series
termination resistors (33
to 47
) should be placed close to
all signal sources. It is a good idea to series-terminate all clock
signals at their source, regardless of trace length.
The receive Rx and Rx signals are the most sensitive
signals on the entire board. Careful routing of these signals
is essential for good receive path performance. The Rx and
Rx signals form a differential pair and should be routed
together as a pair. By keeping the traces adjacent to each other,
noise coupled onto the signals will appear as common mode and
will be largely rejected by the MxFE receive input. Keeping the
driving point impedance of the receive signal low and placing
any low-pass filtering of the signals close to the MxFE will
further reduce the possibility of noise corrupting these signals.
OUTLINE DIMENSIONS
48-Lead Plastic Quad Flatpack [LQFP]
1.4 mm Thick
(ST-48)
Dimensions shown in millimeters
(PINS DOWN)
1
12
13
25
24
36
37
48
0.27
0.22
0.17
0.50
BSC
7.00
BSC
SEATING
PLANE
1.60 MAX
0.75
0.60
0.45
VIEW A
7
3.5
0
0.20
0.09
1.45
1.40
1.35
0.15
0.05
0.08 MAX
COPLANARITY
VIEW A
ROTATED 90 CCW
PIN 1
INDICATOR
9.00 BSC
COMPLIANT TO JEDEC STANDARDS MS-026BBC
SEATING
PLANE
Revision History
Location
Page
10/02—Data Sheet changed from REV. 0 to REV. A.
Changes to to Table IV . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 20
Changes to REGISTER 3—CLOCK SOURCE CONFIGURATION section . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 21
Updated OUTLINE DIMENSIONS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 24
相關PDF資料
PDF描述
AD9877 Mixed-Signal Front End Set-Top Box, Cable Modem
AD9877ABS Mixed-Signal Front End Set-Top Box, Cable Modem
AD9877-EB Mixed-Signal Front End Set-Top Box, Cable Modem
AD9882KST-100 Dual Interface for Flat Panel Displays
AD9882KST-140 Dual Interface for Flat Panel Displays
相關代理商/技術參數
參數描述
AD9876EB 制造商:Analog Devices 功能描述:
AD9876-EB 制造商:AD 制造商全稱:Analog Devices 功能描述:Broadband Modem Mixed-Signal Front End
AD9877 制造商:AD 制造商全稱:Analog Devices 功能描述:Mixed-Signal Front End Set-Top Box, Cable Modem
AD9877ABS 制造商:Rochester Electronics LLC 功能描述: 制造商:Analog Devices 功能描述:
AD9877ABS-1 制造商:Analog Devices 功能描述:
主站蜘蛛池模板: 上饶县| 大新县| 新昌县| 枣强县| 普洱| 黄浦区| 孟州市| 福鼎市| 贵港市| 鞍山市| 安达市| 嘉定区| 丹棱县| 新干县| 四子王旗| 嘉义县| 广水市| 司法| 石屏县| 富阳市| 清水县| 乌兰浩特市| 泸溪县| 甘孜| 海阳市| 织金县| 石柱| 交口县| 揭阳市| 普定县| 岐山县| 珲春市| 池州市| 龙海市| 临海市| 民乐县| 邵东县| 额尔古纳市| 日照市| 山西省| 开远市|