参数资料
型号: TRC105
厂商: RFM
文件页数: 13/67页
文件大小: 0K
描述: IC TXRX 300MHZ-510MHZ 32TQFN
标准包装: 1
频率: 300MHz ~ 510MHz
数据传输率 - 最大: 200kbps
调制或协议: FSK,OOK
应用: 通用
功率 - 输出: 13dBm
灵敏度: -112dBm
电源电压: 2.1 V ~ 3.6 V
电流 - 接收: 3mA
电流 - 传输: 30mA
数据接口: PCB,表面贴装
天线连接器: PCB,表面贴装
工作温度: -40°C ~ 85°C
封装/外壳: 32-TQFN
包装: 标准包装
产品目录页面: 583 (CN2011-ZH PDF)
其它名称: 583-1159-6
Figure 7
As shown in Figure 7, the demodulator section includes the FSK demodulator, the OOK demodulator, data and
clock recovery and the start pattern detection blocks.
If FSK is selected, the demodulation is performed by analyzing the phase between the I and Q limited signals at
the output of the base-band channels.
If OOK is selected, the demodulation is performed by comparing the RSSI output value stored in RXCFG14_
RSSI[7..0] register to the threshold which can be either a fixed value or a time-variant value depending on the
past history of the RSSI output. Table 9 gives the three main possible procedures, which can be selected via the
register MCFG01_RX_OOK[3..2] :
Mode
Fixed Threshold
Peak
Average
MCFG01_RX_OOK[3..2]
00
01
10
Description
RSSI output is compared with a fixed threshold stored in
RXCFG13_OOK_thresh
RSSI output is compared with a threshold which is at a fixed offset
below the maximum RSSI.
RSSI output is compared with the average of the last RSSI values.
Table 9
If the end-user application requires direct access to the output of the demodulator, then the RXCFG12_DCLK_
Dis[6] bit is set to 1 disabling the clock recovery. In this case the demodulator output is directly connected to the
DATA pin and the IRQ1 pin (DCLK) is set to low.
For proper operation of the TRC105 demodulator in FSK mode, the modulation index β of the input signal should
meet the following condition:
β =
2*F DEV
≥ 2
BR
where F DEV is the frequency deviation in hertz (Hz) and BR is the data rate in bits per second (b/s).
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Page 13 of 67
TRC105 - 05/29/13
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