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參數資料
| 型號： | SI4020-I1-FT |
| 廠商： | Silicon Laboratories Inc |
| 文件頁數： | 15/32頁 |
| 文件大小： | 1058K |
| 描述： | IC TX FSK 915MHZ 5.4V 16-TSSOP |
| 標準包裝： | 96 |
| 頻率： | 315MHz，433MHz，868MHz，和 915MHz |
| 調制或協議： | FSK，OOK |
| 數據傳輸率 - 最大： | 256 kbps |
| 電流 - 傳輸： | 14mA |
| 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 ~ 5.4 V |
| 工作溫度： | -40°C ~ 85°C |
| 封裝/外殼： | 16-TSSOP（0.173"，4.40mm 寬） |
| 包裝： | 管件 |
| 產品目錄頁面： | 585 (CN2011-ZH PDF) |
| 其它名稱： | 336-1621-5 |
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Si4020
15
3. Frequency Setting Command
bit 15 14 13 12 11 10
9
8
7
6
5
4
3
2
1
0
POR
1
0
1
0 f11 f10 f9
f8
f7
f6
f5
f4
f3
f2
f1
f0
A7D0h
The 12-bit parameter of the Frequency Setting Command
<f11 : f0> has the value F. The value F should be in the range
of 96 and 3903. When F is out of range, the previous value is
kept. The synthesizer center frequency f
0
can be calculated as:
f
0
= 10 MHz * C1 * (C2 + F/4000)
The constants C1 and C2 are determined by
the selected band as:
Band [MHz] C1 C2
315
1
31
433
1
43
868
2
43
915
3
30
Note:
" For correct operation of the frequency synthesizer, the frequency and band of operation need to be programmed before the
synthesizer is started. Directly after activation of the synthesizer, the RF VCO is calibrated to ensure proper operation in the
programmed frequency band.
" When coding for the Si4020, it is suggested that recalibration routines be added to compensate for significant changes in
temperature and supply voltages.
4. Data Rate Command
bit 15 14 13 12 11 10
9
8
7
6
5
4
3
2
1
0
POR
1
1
0
0
1
0
0
0
r7
r6
r5
r4
r3
r2
r1
r0
C800h
In EEPROM mode the transmitted bit rate is determined by the 8-bit value R (bits <r7 : r0>) as:
BR = 10 MHz / 29 / (R+1)
Apart from setting custom values, the standard bit rates from 2.4 to 115.2 kbps can be approximated with minimal error.
The commands are read out with a different fixed bit rate:
Fsck = 10 MHz / 29 / 3 [~115.2 kHz]
5. Power Setting Command
bit
7
6
5
4
3
2
1
0
POR
1
0
1
1 ook p2 p1 p0
B0h
The bit ook enables the OOK mode for the PA, in this case the data to be transmitted are received through the FSK pin.
p2 p1 p0 Relative Output Power [dB]
0
0
0
0
0
0
1
-3
0
1
0
-6
0
1
1
-9
1
0
0
-12
1
0
1
-15
1
1
0
-18
1
1
1
-21
The output power is given in the table as relative to the
maximum available power, which depends on the actual
antenna impedance. (See: Antenna Application Note
available from www.silabs.com/integration).
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相關代理商/技術參數 |
參數描述 |
|---|---|
| SI4020-I1-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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| Si4021-A1-FT | 功能描述:射頻發射器 Transmitters IA4221 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 |
| SI4021-A1-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 |
| SI-40222 | 制造商:BEL 制造商全稱:Bel Fuse Inc. 功能描述:SI-40222 |
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