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| 型号： | SI4312-B10-GM |
| 厂商： | Silicon Laboratories Inc |
| 文件页数： | 8/22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
3. Functional Description
3.1. Overview
Antenna
Si4312
RX_IN
ADC
DOUT
LNA
PGA
ADC
DSP
MCU
BASEBAND
RATIO
315/434
2.7 – 3.6 V
VDD
GND
AGC
LDO
FREQ
SCAN
XTAL
OSC
PROCESSOR
SQUELCH
TH[1:0]
BT[1:0]
RST
16 MHz
Figure 3. Functional Block Diagram
The Si4312 is a fully-integrated OOK CMOS RF
receiver that operates in the unlicensed 315 and 433.92
MHz ultra high frequency (UHF) bands. It is designed
for high-volume, cost-sensitive RF receiver applications.
The chip operates at a carrier frequency of 315 or
433.92 MHz and supports OOK digital modulation with
data rates of up to 10 kbps NRZ or 5 kbps Manchester
coded. The Si4312 has selectable data filters to
optimize the sensitivity of the receiver for a given data
rate. The Si4312 employs a frequency scanning
algorithm to improve the sensitivity of the receiver with a
small IF bandwidth while still maintaining the ability to
accommodate large transmit frequency offsets. The
integrated on-chip squelch circuit prevents false output
data when the RF input signal is absent or below
sensitivity.
The device leverages Silicon Labs’ patented and proven
digital low-IF architecture and offers superior sensitivity
and interference rejection. The Si4312 can achieve
superior sensitivity in the presence of large interference
due to its high dynamic range ADCs and digital filters.
The digital low-IF architecture also enables superior
blocking ability and low intermodulation distortion for
robust reception in the presence of wide-band
interference.
Digital integration reduces the number of required
external components compared to traditional offerings,
resulting in a solution that only requires a 16 MHz
crystal and passive components allowing a small and
compact printed circuit board (PCB) implementation
area. The high integration of the Si4312 improves the
system manufacturing reliability, improves quality, eases
design-in, and minimizes costs.
3.2. Receiver Description
The RF input signal is amplified by a low-noise amplifier
(LNA) and down-converts to a low intermediate
frequency with a quadrature image-reject mixer. The
mixer output is amplified by a programmable gain
amplifier (PGA), filtered, and digitized with a high-
resolution analog-to-digital converter (ADC). All RF
functions are integrated into the device eliminating any
production alignment issues associated with external
components, such as SAW and ceramic IF filters.
Silicon Labs’ advanced digital low-IF architecture
achieves superior performance by using the DSP to
perform channel filtering, demodulation, automatic gain
control (AGC), automatic frequency control (AFC), and
other baseband processing. DSP implementation of the
channel filters provides better repeatability and control
of the bandwidth and frequency response of the filter
compared to analog implementations. No off-chip
ceramic filters are needed with the Si4312 as all IF
channel filtering is performed in the digital domain.
8
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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