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AD9483/PCB 数据表(PDF) 22 Page - Analog Devices

部件名 AD9483/PCB
功能描述  Triple 8-Bit, 140 MSPS A/D Converter
PDF  26 Pages
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制造商  AD [Analog Devices]
网页  http://www.analog.com
标志 AD - Analog Devices

AD9483/PCB 数据表(HTML) 22 Page - Analog Devices

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AD9483
–22–
REV. A
PCB LAYOUT
The PCB is designed on a four layer (1 oz. Cu) board. Compo-
nents and routing are on the top layer with a ground flood for
additional isolation. Test and ground points were judiciously
placed to facilitate high speed probing. Each channel has a
separate 25-pin connector for it’s digital outputs. A common
ground plane exists on the second layer.
The third layer has the 3 split power planes:
1. 5 V analog for the ADC and preamps,
2. 3.3 V (or 5 V) ADC output supply, and
3. A separate 3.3 V supply for support logic. The fourth layer
contains the –5 V plane for the preamps and additional compo-
nents and routing. There is additional space for two extra com-
ponents on top of the board to allow for modification.
Table IV. 25-Pin Connector Pinout
Pin No.
Pin Name
1
DR (Data Ready)
2
GND
3A0
4A1
5A2
6A3
7A4
8A5
9A6
10
A7
11
GND
12
NC (No Connect)
13
NC (No Connect)
14
DRB (Data Ready Bar)
15
GND
16
B0
17
B1
18
B2
19
B3
20
B4
21
B5
22
B6
23
B7
24
GND
25
NC (No Connect)



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