收藏本站
Si4320
In automatic operation mode (no strobe signal is needed from the microcontroller to update the output offset register), the AFC circuit is
automatically enabled when VDI indicates a potential incoming signal during the whole measurement cycle and the circuit measures the
same result in two subsequent cycles.
There are three operation modes, example from the possible application:
1, ( a1 =0, a0 =1) The circuit measures the frequency offset only once after power up. This way, the extended TX/RX maximum distance can
be achieved. Possible usage: In the final application when the user is inserted the battery the circuit measures and compensate the
frequency offset caused by the crystal tolerances. This method enables to use cheaper quartz in the application and provide quite good
protection against locking in an interferer.
2a, ( a1 =1, a0 =0) The circuit measures automatically the frequency offset during an initial low data rate pattern –easier to receive- (i.e.:
00110011) of the package and change the receiving frequency according that. The further part of the package can be received by the
corrected frequency settings.
2b, ( a1 =1, a0 =0) The transmitter must transmit the first part of the packet with a step higher deviation and later there is a possibility to
reduce it.
In both cases ( 2a and 2b ) when the VDI indicates poor receiving conditions (VDI goes low) the output register is automatically cleared. It’s
suggested to use when one receiver receives signal from more than one transmitter.
3, (a1=1, a0=1) It is similar to the 2a and 2b modes, but 3 is suggested to use when a receiver operates with only one transmitter. After a
complete measuring cycle, the measured value is held independently of the sate of VDI signal.
8. Data Filter Command
bit
15
1
14
1
13
0
12
0
11
0
10
1
9
0
8
0
7
al
6
ml
5
1
4
s1
3
s0
2
f2
1
f1
0
f0
POR
C42Ch
Bit 7 <al>:
Bit 6 <ml>:
Bit 3-4 <s0 : s1>:
Clock recovery (CR) auto lock control if set.
It means that the CR start in fast mode after locking it automatically switches to slow mode.
Clock recovery lock control
1: fast mode, fast attack and fast release
0: slow mode, slow attack and slow release
Using the slower one requires more accurate bit timing (see Data Rate Command).
Select the type of the data filter:
s1
0
0
1
1
s0
0
1
0
1
Filter Type
OOK to filter
Digital filter
Reserved
Analog RC filter
OOK to filter: the analog RSSI signal is used as received data. The DRSSI threshold level is used for slicing.
Digital: this is a digital realization of an analog RC filter followed by a comparator with hysteresis. The time constant is automatically
adjusted to the bit rate defined by the Data Rate Command.
Analog RC filter: The demodulator output is fed to pin 7 over a 10 kOhm resistor. The filter cut-off frequency is set by the external capacitor
connected to this pin and VSS.
The table shows the optimal filter capacitor values for different data rates:
1.2 kbps
12 nF
2.4 kbps
8.2 nF
4.8 kbps
6.8 nF
9.6 kbps
3.3 nF
19.2 kbps
1.5 nF
38.4 kbps
680 pF
57.6 kbps
270 pF
115.2 kbps
150 pF
256 kbps
100 pF
Note:
If analog RC filter is selected the internal clock recovery circuit and the FIFO cannot be used.
Bit 0-2 <f0 : f2>:
DQD threshold parameter.
Note:
To let the DQD report "good signal quality" the threshold parameter should be less than 4 in the case when the bitrate is close to
the deviation. At higher deviation/bitrate settings higher threshold parameter can report "good signal quality" as well.
16
发布紧急采购，3分钟左右您将得到回复。

采购需求

(若只采购一条型号，填写一行即可)

发布成功！您可以继续发布采购。也可以进入我的后台，查看报价

发布成功！您可以继续发布采购。也可以进入我的后台，查看报价

*型号 *数量 厂商 批号 封装
添加更多采购

我的联系方式

*
*
*
相关PDF资料
SI4322-A0-FT IC RX FSK UNI 868/915MHZ 16TSSOP
SI4324DY-T1-GE3 MOSFET N-CH D-S 30V 8-SOIC
SI4330-B1-FM IC RCVR ISM 960MHZ 3.6V 20-QFN
SI4354DY-T1-GE3 MOSFET N-CH D-S 30V 8-SOIC
SI4355-B1A-FM IC EZRADIO FM RECEIVER SI4355
SI4388DY-T1-GE3 MOSFET DUAL N-CH 30V 8-SOIC
SI4390DY-T1-GE3 MOSFET N-CH 30V 8.5A 8SOIC
SI4396DY-T1-GE3 MOSFET N-CH D-S 30V 8-SOIC
相关代理商/技术参数
SI4320-J1-FTR 功能描述:射频接收器 Receiver (EZRadio) 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
Si4322-A0-FT 功能描述:射频接收器 Receivers - IA4322 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
SI4322-A0-FTR 功能描述:射频接收器 Receiver (EZRadio) 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
Si4322-A1-FT 功能描述:射频接收器 RECEIVER EZRadio UNIVRSL ISM BAND FSK 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
SI4322DY-T1-E3 功能描述:MOSFET 30V 18A 5.4W 8.5mohm @ 10V RoHS:否 制造商:STMicroelectronics 晶体管极性:N-Channel 汲极/源极击穿电压:650 V 闸/源击穿电压:25 V 漏极连续电流:130 A 电阻汲极/源极 RDS（导通）:0.014 Ohms 配置:Single 最大工作温度: 安装风格:Through Hole 封装 / 箱体:Max247 封装:Tube
SI4322DY-T1-GE3 功能描述:MOSFET 30V 18A 5.4W 8.5mohm @ 10V RoHS:否 制造商:STMicroelectronics 晶体管极性:N-Channel 汲极/源极击穿电压:650 V 闸/源击穿电压:25 V 漏极连续电流:130 A 电阻汲极/源极 RDS（导通）:0.014 Ohms 配置:Single 最大工作温度: 安装风格:Through Hole 封装 / 箱体:Max247 封装:Tube
SI4324DY-T1-E3 功能描述:MOSFET 30V 36A 7.8W RoHS:否 制造商:STMicroelectronics 晶体管极性:N-Channel 汲极/源极击穿电压:650 V 闸/源击穿电压:25 V 漏极连续电流:130 A 电阻汲极/源极 RDS（导通）:0.014 Ohms 配置:Single 最大工作温度: 安装风格:Through Hole 封装 / 箱体:Max247 封装:Tube
SI4324DY-T1-GE3 功能描述:MOSFET 30V 36A 7.8W 3.2mohm @ 10V RoHS:否 制造商:STMicroelectronics 晶体管极性:N-Channel 汲极/源极击穿电压:650 V 闸/源击穿电压:25 V 漏极连续电流:130 A 电阻汲极/源极 RDS（导通）:0.014 Ohms 配置:Single 最大工作温度: 安装风格:Through Hole 封装 / 箱体:Max247 封装:Tube