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參數(shù)資料
| 型號： | 210007039-002 |
| 廠商： | Electronic Theatre Controls, Inc. |
| 英文描述： | 350mWAudio Power Amplifier with Shutdown Mode |
| 中文描述： | 350mWAudio功率放大器關(guān)斷模式 |
| 文件頁數(shù)： | 17/21頁 |
| 文件大?。?/td> | 877K |
| 代理商： | 210007039-002 |
Application Information
(Continued)
Mono
HWD21
19 Reference Design Boards
Bill of Material for all Demo Boards
Item
1
10
20
21
25
30
35
Part Number
551011208-001
HWD
21
19 Mono Reference Design Board
482911183-001
HWD
21
19 Audio AMP
151911207-001
Tant Cap 1uF 16V 10
151911207-002
Cer Cap 0.39uF 50V Z5U 20% 1210
152911207-001
Tant Cap 1uF 16V 10
472911207-001
Res 20K Ohm 1/10W 5
210007039-002
Jumper Header Vertical Mount 2X1
Part Description
Qty
Ref Designator
1
1
U1
1
1
1
3
2
C1
C2
C3
R1, R2, R3
J1, J2
0.100
PCB LAYOUT GUIDELINES
This section provides practical guidelines for mixed signal
PCB layout that involves various digital/analog power and
ground traces. Designers should note that these are only
’rule-of-thumb’ recommendations and the actual results will
depend heavily on the final layout.
General Mixed Signal Layout Recommendation
Power and Ground Circuits
For two layer mixed signal design, it is important to isolate
the digital power and ground trace paths from the analog
power and ground trace paths. Star trace routing techniques
(bringing individual traces back to a central point rather than
daisy chaining traces together in a serial manner) can have
a major impact on low level signal performance. Star trace
routing refers to using individual traces to feed power and
ground to each circuit or even device. This technique will
take require a greater amount of design time but will not
increase the final price of the board. The only extra parts
required will be some jumpers.
Single-Point Power / Ground Connections
The analog power traces should be connected to the digital
traces through a single point (link). A ’Pi-filter’ can be helpful
in minimizing high frequency noise coupling between the
analog and digital sections. It is further recommended to put
digital and analog power traces over the corresponding digi-
tal and analog ground traces to minimize noise coupling.
Placement of Digital and Analog Components
All digital components and high-speed digital signals traces
should be located as far away as possible from analog
components and circuit traces.
Avoiding Typical Design / Layout Problems
Avoid ground loops or running digital and analog traces
parallel to each other (side-by-side) on the same PCB layer.
When traces must cross over each other do it at 90 degrees.
Running digital and analog traces at 90 degrees to each
other from the top to the bottom side as much as possible will
minimize capacitive noise coupling and cross talk.
17
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