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參數(shù)資料
| 型號： | AFE1115E |
| 元件分類： | 圓形連接器 |
| 英文描述： | Circular Connector; No. of Contacts:12; Series:MS27467; Body Material:Aluminum; Connecting Termination:Crimp; Connector Shell Size:15; Circular Contact Gender:Socket; Circular Shell Style:Straight Plug; Insert Arrangement:15-97 RoHS Compliant: No |
| 中文描述： | HDSL / MDSL模擬前端與石英振蕩器 |
| 文件頁數(shù)： | 12/12頁 |
| 文件大?。?/td> | 219K |
| 代理商： | AFE1115E |
12
AFE1115
The performance of the VCXO is critically dependent on the
external components and printed circuit board layout that is
used. The varactor diodes and the crystal are particularly
important components.
The printed circuit board layout containing the two varactor
diodes, D1 and D2, in the VCXO external circuitry is critical
to the performance of the VCXO. In particular, the two
connection points of the varactor diodes shown in the Figure
7 must have very low parasitic capacitance to ground to
achieve the best tuning range possible. To achieve lowest
parasitic capacitance to ground, there must be no ground
plane or other PCB traces near these two points. Ground
planes and other traces should be kept 1 cm away from these
two points where possible.
Figure 8 shows an example of a printed circuit board layout
of the sensitive VCXO circuitry for the circuit shown in
Figure 7. There should be no ground planes, power planes or
other traces in the white area indicated around the two
sensitive points. The balance of the circuit board should be
covered by ground planes where possible. With the circuit
shown in Figure 7, these typical specifications were achieved.
Pull Range at 20MHz
±
125ppm
Frequency Range of Crystal that can be used
10MHz to 28MHz
Crystal Frequency
48x baud rate
FIGURE 8. VCXO Circuit Layout, Approximately Two Times Actual Size.
FIGURE 7. VCXO Circuitry.
VCXO Input, 2
AFE1115
VCXO Output, 1
vcDAC, 47
VCXO Clock Output, 3
Buffered VCXO Clock Output
0.1μF
150pF
150pF
R
L
R
L
= 1k
for 5V Operation
R
= 600
for 3.3V Operation
D1 = D2 = Philips Semiconductor BB809
68.1k
R
2
D2
D1
DV
DD
Parasitic capacitance must be minimized
at these points. No other traces or ground
plane should be inside the dotted box.
68.1k
R
5
68.1k
R
4
6
6
X
Sensitive Points
No ground/power planes
or other traces in this area
Ground
Plane
To AFE1115 Pin #47
To AFE1115 Pin #2
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| AFE1124 | LJT 12C 8#20 4#16 SKT WALL REC |
| AFE1124E | Circular Connector; No. of Contacts:15; Series:MS27467; Body Material:Aluminum; Connecting Termination:Crimp; Connector Shell Size:15; Circular Contact Gender:Pin; Circular Shell Style:Straight Plug; Insert Arrangement:15-15 RoHS Compliant: No |
| AFE1144 | Circular Connector; No. of Contacts:15; Series:MS27467; Body Material:Aluminum; Connecting Termination:Crimp; Connector Shell Size:15; Circular Contact Gender:Pin; Circular Shell Style:Straight Plug; Insert Arrangement:15-15 RoHS Compliant: No |
| AFE1144E | Circular Connector; No. of Contacts:15; Series:MS27467; Body Material:Aluminum; Connecting Termination:Crimp; Connector Shell Size:15; Circular Contact Gender:Socket; Circular Shell Style:Straight Plug; Insert Arrangement:15-15 RoHS Compliant: No |
| AFE1203 | Circular Connector; No. of Contacts:15; Series:MS27467; Body Material:Aluminum; Connecting Termination:Crimp; Connector Shell Size:15; Circular Contact Gender:Socket; Circular Shell Style:Straight Plug; Insert Arrangement:15-15 RoHS Compliant: No |
相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| AFE1115E/1K | 功能描述:IC ANALOG FRONT END 56-SSOP RoHS:是 類別:集成電路 (IC) >> 數(shù)據(jù)采集 - 模擬前端 (AFE) 系列:- 產(chǎn)品培訓(xùn)模塊:Lead (SnPb) Finish for COTS Obsolescence Mitigation Program 標(biāo)準(zhǔn)包裝:2,500 系列:- 位數(shù):- 通道數(shù):2 功率（瓦特）:- 電壓 - 電源，模擬:3 V ~ 3.6 V 電壓 - 電源，數(shù)字:3 V ~ 3.6 V 封裝/外殼:32-VFQFN 裸露焊盤 供應(yīng)商設(shè)備封裝:32-QFN（5x5） 包裝:帶卷 (TR) |
| AFE1115E-1 | 制造商:Rochester Electronics LLC 功能描述:- Bulk |
| AFE1115E-1/1K | 制造商:Rochester Electronics LLC 功能描述:- Bulk |
| AFE1124 | 制造商:BB 制造商全稱:BB 功能描述:HDSL/MDSL ANALOG FRONT END |
| AFE1124E | 功能描述:電信線路管理 IC HDSL/MDSL Analog Front End RoHS:否 制造商:STMicroelectronics 產(chǎn)品:PHY 接口類型:UART 電源電壓-最大:18 V 電源電壓-最小:8 V 電源電流:30 mA 最大工作溫度:+ 85 C 最小工作溫度:- 40 C 安裝風(fēng)格:SMD/SMT 封裝 / 箱體:VFQFPN-48 封裝:Tray |
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