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参数资料
| 型号： | SI4020-I1-FT |
| 厂商： | Silicon Laboratories Inc |
| 文件页数： | 15/32页 |
| 文件大小： | 1058K |
| 描述： | IC TX FSK 915MHZ 5.4V 16-TSSOP |
| 标准包装： | 96 |
| 频率： | 315MHz，433MHz，868MHz，和 915MHz |
| 调制或协议： | FSK，OOK |
| 数据传输率 - 最大： | 256 kbps |
| 电流 - 传输： | 14mA |
| 数据接口： | PCB，表面贴装 |
| 天线连接器： | PCB，表面贴装 |
| 电源电压： | 2.2 V ~ 5.4 V |
| 工作温度： | -40°C ~ 85°C |
| 封装/外壳： | 16-TSSOP（0.173"，4.40mm 宽） |
| 包装： | 管件 |
| 产品目录页面： | 585 (CN2011-ZH PDF) |
| 其它名称： | 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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相关代理商/技术参数 |
参数描述 |
|---|---|
| SI4020-I1-FTR | 功能描述:射频发射器 Transmitter EZRadio RoHS:否 制造商:Micrel 类型:ASK Transmitter 封装 / 箱体:SOT-23-6 工作频率:300 MHz to 450 MHz 封装:Reel |
| SI-40219 | 制造商:BEL 制造商全称:Bel Fuse Inc. 功能描述:SI-40219 |
| Si4021-A1-FT | 功能描述:射频发射器 Transmitters IA4221 RoHS:否 制造商:Micrel 类型:ASK Transmitter 封装 / 箱体:SOT-23-6 工作频率:300 MHz to 450 MHz 封装:Reel |
| SI4021-A1-FTR | 功能描述:射频发射器 Transmitter EZRadio RoHS:否 制造商:Micrel 类型:ASK Transmitter 封装 / 箱体:SOT-23-6 工作频率:300 MHz to 450 MHz 封装:Reel |
| SI-40222 | 制造商:BEL 制造商全称:Bel Fuse Inc. 功能描述:SI-40222 |
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