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參數(shù)資料
| 型號： | TDK5100 |
| 廠商： | INFINEON TECHNOLOGIES AG |
| 英文描述： | ASK/FSK Transmitter 868/433 MHz |
| 中文描述： | 詢價/ FSK發(fā)射器433分之868兆赫 |
| 文件頁數(shù)： | 28/40頁 |
| 文件大?。?/td> | 629K |
| 代理商： | TDK5100 |
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Applications
3 - 9
TDK 5100
Wireless Components
Specification, October 2002
If the FSK switch is closed, Cv_ is equal to Cv1 (C6 in the application diagram).
If the FSK switch is open, Cv2 (C7 in the application diagram) can be calculated.
Csw:
parallel capacitance of the FSK switch (3 pF incl. layout parasitics)
Remark:
These calculations are only approximations. The necessary values
depend on the layout also and must be adapted for the specific
application board.
3.6
Design Hints on the Clock Output (CLKOUT)
The CLKOUT pin is an open collector output. An external pull up resistor (RL)
should be connected between this pin and the positive supply voltage. The
value of RL is depending on the clock frequency and the load capacitance CLD
(PCB board plus input capacitance of the microcontroller). RL can be calculated
to:
Remark:
To achieve a low current consumption and a low
spurious radiation, the largest possible RL should be chosen.
Even harmonics of the signal at CLKOUT can interact with the crystal oscillator
input COSC preventing the start-up of oscillation. Care must be taken in layout
by sufficient separation of the signal lines to ensure sufficiently small coupling.
1
)
(
)
1
(
)
(
1
7
2
Cv
Cv
Csw
Cv
Cv
+
Cv
Csw
C
Cv
+
+
=
=
Table 3-2
fCLKOUT=
847 kHz
fCLKOUT=
3.39 MHz
CL
[
pF
]
5
RL
[
kOhm
]
27
CL
[
pF
]
5
RL
[
kOhm
]
6.8
10
12
10
3.3
20
6.8
20
1.8
CLD
fCLKOUT
RL
*
8
*
1
=
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| TDK5100F | 功能描述:射頻接收器 2.1-4 V ASK/FSK Transmitter IC RoHS:否 制造商:Skyworks Solutions, Inc. 類型:GPS Receiver 封裝 / 箱體:QFN-24 工作頻率:4.092 MHz 工作電源電壓:3.3 V 封裝:Reel |
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