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| 型号： | SI4312-B10-GM |
| 厂商： | Silicon Laboratories Inc |
| 文件页数： | 12/22页 |
| 文件大小： | 0K |
| 描述： | IC RX OOK 315/434MHZ 20VQFN |
| 特色产品： | Si4010 EZRadio? Wireless IC |
| 标准包装： | 490 |
| 系列： | EZRadio® |
| 频率： | 315MHz，434MHz |
| 灵敏度： | -110dBm |
| 数据传输率 - 最大： | 10 kBaud |
| 调制或协议： | OOK |
| 应用： | 车库门开启器，RKE，安全警报 |
| 数据接口： | PCB，表面贴装 |
| 天线连接器： | PCB，表面贴装 |
| 电源电压： | 2.7 V ~ 3.6 V |
| 工作温度： | -40°C ~ 85°C |
| 封装/外壳： | 20-VFQFN 裸露焊盘 |
| 供应商设备封装： | 20-QFN（3x3） |
| 包装： | 管件 |
| 产品目录页面： | 585 (CN2011-ZH PDF) |
| 其它名称： | 336-1977-5 |
Si4312
Low Gain:
Input RSSI in the range of
-45dBm ~ -15dBm
Scan
Medium Gain:
Input RSSI in the range of
-75dBm to -40dBm
High Gain:
Input RSSI in the range of
Sensitivity to -70dBm
Fc
Directions
Freq Bin 1
Freq Bin 2
Freq Bin 3
Figure 6. Frequency Scan Algorithm Depicting 3 Frequency Bins of 140 kHz and 3 Gain Settings
Frequency scanning is always enabled to find the transmitted signal. The scanning process stops after the correct
frequency band is found for the transmitted signal and is held throughout the duration of the packet plus a time of
no RF signal activity. This dead time is called “threshold hold time” and is described in section 3.7. Theshold hold
time allows a frequency found in the first packet of transmission to be held for any subsequent retransmissions of
packets if the retransmissions occur before the threshold hold time. This held frequency ensures all bits of the
second and subsequent packets are recovered completely. Frequency scanning resumes after the time of no RF
signal activity exceeds the threshold hold time.
3.7. Threshold Hold Time Selection
The threshold hold time is defined as the length of time the Si4312 keeps its slicer threshold voltage level when no
signals are present. If a signal does not appear after this time interval, the Si4312 will re-start the frequency scan
process and look for the signal in one of its three frequency bins. The threshold hold times are determined by the
bit settings chosen on pins 16 and 17 as shown in Table 12.
Table 12. Threshold Time Settings Based on TH[1:0] Logic Levels
TH1 (Pin 16)
0
0
1
1
TH0 (Pin 17)
0
1
0
1
Threshold Hold Time (ms)
70
100
300
500
3.8. Low Noise Amplifier Input Circuit
Figure 2 shows the typical application circuit with 50 ? matching. Components C3 and L1 are used to transform the
input impedance of the LNA. C3 is equal to 15 pF and L1 is equal to 33 nH at 433.92 MHz and 62 nH at 315 MHz
for 50 ? matching.
12
Rev. 0.5
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相关代理商/技术参数 |
参数描述 |
|---|---|
| SI4312-B10-GMR | 功能描述:射频接收器 315/434 MHz OOK Receiver RoHS:否 制造商:Skyworks Solutions, Inc. 类型:GPS Receiver 封装 / 箱体:QFN-24 工作频率:4.092 MHz 工作电源电压:3.3 V 封装:Reel |
| SI4312-DB | 制造商:SILABS 制造商全称:SILABS 功能描述:Si4312 DEMO BOARD USERa??S GUIDE |
| SI4312-DK1 | 制造商:Silicon Laboratories Inc 功能描述: |
| SI4313 | 制造商:SILABS 制造商全称:SILABS 功能描述:Si4313 LOW-COST ISM RECEIVER |
| SI4313-B1 | 制造商:SILABS 制造商全称:SILABS 功能描述:Si4313 LOW-COST ISM RECEIVER |
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