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參數資料
| 型號： | SI4022-A0-FT |
| 廠商： | Silicon Laboratories Inc |
| 文件頁數： | 17/20頁 |
| 文件大小： | 726K |
| 描述： | IC TX FSK UNI 868/915MHZ 16TSSOP |
| 標準包裝： | 96 |
| 頻率： | 868MHz，915MHz |
| 應用： | ISM |
| 調制或協議： | FSK |
| 數據傳輸率 - 最大： | 115.2kbps |
| 功率 - 輸出： | 6dBm |
| 電流 - 傳輸： | 24mA |
| 數據接口： | PCB，表面貼裝 |
| 天線連接器： | PCB，表面貼裝 |
| 電源電壓： | 2.2 V ~ 3.8 V |
| 工作溫度： | -40°C ~ 85°C |
| 封裝/外殼： | 16-TSSOP（0.173"，4.40mm 寬） |
| 包裝： | 管件 |
17
Si4022
Bit Rate:
20
40
60
80
100
120
140
160
868
2
12
25
30
40
50
70
80
915
2
12
20
30
40
50
60
70
Bit Rate:
20
40
60
80
100
120
140
160
868
do not use
8
20
30
40
50
60
70
915
do not use
8
15
30
40
50
60
70
Bit Rate:
20
40
60
80
100
120
140
160
868
do not use do not use
10
20
30
40
50
70
915
do not use do not use
10
20
30
40
50
60
Bit Rate:
20
40
60
80
100
120
140
160
868
do not use do not use do not use do not use do not use
2
12
25
915
do not use do not use do not use do not use do not use
2
12
20
2.4 kbps
9.6 kbps
38.4 kbps
115.2 kbps
Transmitter Deviation [+/- kHz]
Transmitter Deviation [+/- kHz]
Transmitter Deviation [+/- kHz]
Transmitter Deviation [+/- kHz]
CRYSTAL SELECTION GUIDELINES
The crystal oscillator of the Si4022 requires a 10 MHz parallel mode crystal. The circuit contains an integrated load capacitor in order
to minimize the external component count. The internal load capacitance value is programmable from 8.5 pF to 16 pF in 0.5 pF steps.
With appropriate PCB layout, the total load capacitance value can be 10 pF to 20 pF so a variety of crystal types can be used.
When the total load capacitance is not more than 20 pF and a worst case 7 pF shunt capacitance (C
0
) value is expected for the crystal,
the oscillator is able to start up with any crystal having less than 300 ohms ESR (equivalent series loss resistance). However, lower
C
0
and ESR values guarantee faster oscillator startup. It is recommended to keep the PCB parasitic capacitances on the XTL pin as
low as possible.
The crystal frequency is used as the reference of the PLL, which generates the RF carrier frequency (f
c
). Therefore f
c
is directly
proportional to the crystal frequency. The accuracy requirements for production tolerance, temperature drift and aging can thus be
determined from the maximum allowable carrier frequency error.
Maximum XTAL Tolerances Including Temperature and Aging [ppm]
Whenever a low frequency error is essential for the application, it is possible to pull the crystal to the accurate frequency by
changing the load capacitor value. The widest pulling range can be achieved if the nominal required load capacitance of the crystal
is in the midrange , for example 16 pF. The pull-ability of the crystal is defined by its motional capacitance and C
0
.
Note:
Note:
Note:
Note:
Note: There may be other requirements for the TX carrier accuracy with regards to the requirements as defined by standards and/or
channel separations.
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相關代理商/技術參數 |
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| SI4022-A0-FTR | 功能描述:射頻發射器 Transmitter EZRadio RoHS:否 制造商:Micrel 類型:ASK Transmitter 封裝 / 箱體:SOT-23-6 工作頻率:300 MHz to 450 MHz 封裝:Reel |
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| SI-40233 | 制造商:BEL 制造商全稱:Bel Fuse Inc. 功能描述:SI-40233 |
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