HopeRF公司的RFM22B/23B是 ISM收发器" title="收发器">收发器模块,采用Silabs 公司的Si4430/31/32 ISM收发器,而 Silabs 公司的Si4430/31/32的是高度集成的单片无线ISM收发器,具有极好的接收灵敏度(–121 dBm)以及业界最好的+20 dB输出功率,工作频率240–930 MHz (Si4431/32)或900–960 MHz (Si4430),工作电压1.8V-3.6V,主要用在遥控,家庭安全和告警,个人数据采集,玩具控制,无线PC外设,家庭自动化,工业控制,传感器网络以及健康监视等.本文介绍了Silabs 公司的Si4430/31/32主要特性,功能方框图, RX/TX Direct-Tie应用电路" title="应用电路">应用电路, 天线分集" title="天线分集">天线分集应用电路图, TX/RX Direct-Tie参考设计" title="参考设计">参考设计电路图以及HopeRF公司的RFM22B/23B ISM收发器模块主要特性,应用电路和参考设计电路.
Si4430/31/32 ISM TRANSCEIVER
Silicon Laboratories’ Si4430/31/32 devices are highly integrated, single chip wireless ISM transceivers. The high-performance EZRadioPRO® family includes a complete line of transmitters, receivers, and transceivers allowing the RF system designer to choose the optimal wireless part for their application.
The Si4430/31/32’s high level of integration offers reduced BOM cost while simplifying the overall system design. The extremely low receive sensitivity (–121 dBm) coupled with industry leading +20 dBm output power ensures extended range and improved link performance. Built-in antenna diversity and support for frequency hopping can be used to further extend range and enhance performance.
The Si4430/31/32 offers advanced radio features including continuous frequency coverage from 240–960 MHz in 156 Hz or 312 Hz steps allowing precise tuning control. Additional system features such as an automatic wake-up timer, low battery detector, 64 byte TX/RX FIFOs, automatic packet handling, and preamble detection reduce overall current consumption and allow the use of lower-cost system MCUs. An integrated temperature sensor, general purpose ADC, poweron-reset (POR), and GPIOs further reduce overall system cost and size.
The Si4430/31/32’s digital receive architecture features a high-performance ADC and DSP based modem which performs demodulation, filtering, and packet handling for increased flexibility and performance. The direct digital transmit modulation and automatic PA power ramping ensure precise transmit modulation and reduced spectral spreading ensuring compliance with global regulations including FCC, ETSI, ARIB, and 802.15.4d regulations.
An easy-to-use calculator is provided to quickly configure the radio settings, simplifying customer’s system design and reducing time to market.
Si4430/31/32主要特性:
Frequency Range
240–930 MHz (Si4431/32)
900–960 MHz (Si4430)
Sensitivity = –121 dBm
Output power range
+20 dBm Max (Si4432)
+13 dBm Max (Si4430/31)
Low Power Consumption
18.5 mA receive
30 mA @ +13 dBm transmit
85 mA @ +20 dBm transmit
Data Rate = 0.123 to 256 kbps
FSK, GFSK, and OOK modulation
Power Supply = 1.8 to 3.6 V
Ultra low power shutdown mode
Digital RSSI
Wake-up timer
Auto-frequency calibration (AFC)
Power-on-reset (POR)
Antenna diversity and TR switch control
Configurable packet handler
Preamble detector
TX and RX 64 byte FIFOs
Low battery detector
Temperature sensor and 8-bit ADC
–40 to +85℃ temperature range
Integrated voltage regulators
Frequency hopping capability
On-chip crystal tuning
20-Pin QFN package
Low BOM
Si4430/31/32应用:
Remote control
Home security & alarm
Telemetry
Personal data logging
Toy control
Tire pressure monitoring
Wireless PC peripherals
Remote meter reading
Remote keyless entry
Home automation
Industrial control
Sensor networks
Health monitors
Tag readers
图1.Si4430/31/32功能方框图
图2.Si4430/31 RX/TX Direct-Tie应用电路
图3.Si4432天线分集应用电路图
图4.TX/RX Direct-Tie参考设计电路图
HopeRF公司的RFM22B/23B ISM收发器模块
RFM22B/23B ISM TRANSCEIVER MODULE
HopeRF’s RFM22B/23B are highly integrated, low cost,433/868/915MHZ wireless ISM transceivers module. The low receive sensitivity coupled with industry leading +20dBm output power ensures range and improved link performance. Built-in antenna diversity and support for frequency hopping can be used to further extend range and enhance performance.
Additional system features such as an automatic wake-up timer, low battery detector, 64 byte TX/RX FIFOs, automatic packet handling, and preamble detection reduce overall current consumption and allow the use of lower-cost system MCUs. An integrated temperature sensor, general purpose ADC, poweron- reset (POR), and GPIOs further reduce overall system cost and size.
The RFM22B/23B’s digital receive architecture features a high-performance ADC and DSP based modem which performs demodulation, filtering, and packet handling for increased flexibility and performance. The direct digital transmit modulation and automatic PA power ramping ensure precise transmit modulation and reduced spectral spreading ensuring compliance with global regulations including FCC, ETSI.
An easy-to-use calculator is provided to quickly configure the radio settings, simplifying customer’s system design and reducing time to market.
图5. RFM22B/23B模块外形图
RFM22B/23B主要特性:
Frequency Range
433/868/915MHz ISM bands
Sensitivity = –121 dBm
Output power range
+20 dBm Max (RFM22B)
+13 dBm Max (RFM23B)
Low Power Consumption
18.5 mA receive
30 mA @ +13 dBm transmit
85 mA @ +20 dBm transmit
Data Rate = 0.123 to 256 kbps
FSK, GFSK, and OOK modulation
Power Supply = 1.8 to 3.6 V
Ultra low power shutdown mode
Digital RSSI
Wake-up timer
Auto-frequency calibration (AFC)
Power-on-reset (POR)
Antenna diversity and TR switch control
Configurable packet handler
Preamble detector
TX and RX 64 byte FIFOs
Low battery detector
Temperature sensor and 8-bit ADC
–40 to +85℃ temperature range
Integrated voltage regulators
Frequency hopping capability
On-chip crystal tuning
14-PIN DIP & 16-PIN SMD package
Low cost
RFM22B/23B应用:
Remote control
Home security & alarm
Telemetry
Personal data logging
Toy control
Tire pressure monitoring
Wireless PC peripherals
Remote meter reading
Remote keyless entry
Home automation
Industrial control
Sensor networks
Health monitors
Tag readers
图6.RFM23B应用电路图
图7.RFM22B参考设计电路图
图8.RFM23B参考设计电路图
详情请见:
http://www.silabs.com/support/pages/support.aspx?productfamily=ezradiopro&partnumber=si4431
和
http://www.hoperf.com/upfile/RFM23.PDF
