HopeRF公司的RFM22B/23B是 ISM收發(fā)器" title="收發(fā)器">收發(fā)器模塊,采用Silabs 公司的Si4430/31/32 ISM收發(fā)器,而 Silabs 公司的Si4430/31/32的是高度集成的單片無線ISM收發(fā)器,具有極好的接收靈敏度(–121 dBm)以及業(yè)界最好的+20 dB輸出功率,工作頻率240–930 MHz (Si4431/32)或?900–960 MHz (Si4430),工作電壓1.8V-3.6V,主要用在遙控,家庭安全和告警,個人數(shù)據(jù)采集,玩具控制,無線PC外設(shè),家庭自動化,工業(yè)控制,傳感器網(wǎng)絡(luò)以及健康監(jiān)視等.本文介紹了Silabs 公司的Si4430/31/32主要特性,功能方框圖, RX/TX Direct-Tie應(yīng)用電路" title="應(yīng)用電路">應(yīng)用電路, 天線分集" title="天線分集">天線分集應(yīng)用電路圖, TX/RX Direct-Tie參考設(shè)計" title="參考設(shè)計">參考設(shè)計電路圖以及HopeRF公司的RFM22B/23B ISM收發(fā)器模塊主要特性,應(yīng)用電路和參考設(shè)計電路.

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應(yīng)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

圖1.Si4430/31/32功能方框圖

圖2.Si4430/31 RX/TX Direct-Tie應(yīng)用電路

圖3.Si4432天線分集應(yīng)用電路圖

圖4.TX/RX Direct-Tie參考設(shè)計電路圖

HopeRF公司的RFM22B/23B ISM收發(fā)器模塊

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.

圖5. RFM22B/23B模塊外形圖

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應(yīng)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

圖6.RFM23B應(yīng)用電路圖

圖7.RFM22B參考設(shè)計電路圖

圖8.RFM23B參考設(shè)計電路圖
詳情請見:
http://www.silabs.com/support/pages/support.aspx?productfamily=ezradiopro&partnumber=si4431
和
http://www.hoperf.com/upfile/RFM23.PDF