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Si446x高性能低电流无线收发器解决方案

文章来源：更新时间：2015/4/16 9:21:00

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Silabs公司的Si446x是频率范围119到1050MHz的高性能低电流无线收发器,无线部分是EZRadioPRO系列,包括发送器,接收器,灵敏度-126dBm,输出功率为+20 dBm (Si4464/63),+16 dBm (Si4461),+13 dBm (Si4460).数据速率100bps-1Mbps,工作电压1.8V-3.6V,主要用于智能测试(802.15.4g & MBus),遥控,家庭安全和告警,车库门开启,家庭自动化,工业控制,传感器网络,健康监视器等.本文介绍了Si446x主要特性, 框图和几种应用电路,以及Si4461 868 MHz无线开发板EZRadioPRO主要特性和电路图.
Silicon Laboratories’ Si446x devices are high-performance, low-current transceivers covering the sub-GHz frequency bands from 119 to 1050 MHz. The radios are part of the EZRadioPRO® family, which includes a complete line of transmitters, receivers, and transceivers covering a wide range of applications. All parts offer outstanding sensitivity of –126 dBm while achieving extremely low active and standby current consumption. The Si4463/61/60 offers frequency coverage in all major bands. The Si4464 offers frequency coverage in bands not covered by Si4463/61/60. Typically, these are non-standard frequencies or licensed frequency bands. The Si446x includes optimal phase noise, blocking, and selectivity performance for narrow band and licensed band applications, such as FCC Part90 and 169 MHz wireless Mbus. The 60 dB adjacent channel selectivity with 12.5 kHz channel spacing ensures robust receive operation in harsh RF conditions, which is particularly important for narrow band operation.
The Si4464/63 offers exceptional output power of up to +20 dBm with outstanding TX efficiency. The high output power and sensitivity results in an industry-leading link budget of 146 dB allowing extended ranges and highly robust communication links. The Si4460 active mode TX current consumption of 18 mA at +10 dBm and RX current of 10 mA coupled with extremely low standby current and fast wake times ensure extended battery life in the most demanding applications. The Si4464/63 can achieve up to +27 dBm output power with built-in ramping control of a low-cost external FET. The devices can meet worldwide regulatory standards:
FCC, ETSI, and ARIB. All devices are designed to be compliant with 802.15.4g and WMbus smart metering standards. The devices are highly flexible and can be configured via the Wireless Development Suite (WDS) available on the Silicon Labs web site.

Si446x主要特性:
 Frequency range = 119–1050 MHz
 Receive sensitivity = –126 dBm
 Modulation
(G)FSK, 4(G)FSK, (G)MSK ,OOK
 Max output power
+20 dBm (Si4464/63)
+16 dBm (Si4461)
+13 dBm (Si4460)
 PA support for +27 or +30 dBm
 Low active power consumption
10/13 mA RX
18 mA TX at +10 dBm (Si4460)
 Ultra low current powerdown modes
30 nA shutdown, 50 nA standby
 Data rate = 100 bps to 1 Mbps
 Fast wake and hop times
 Power supply = 1.8 to 3.6 V
 Excellent selectivity performance
60 dB adjacent channel
75 dB blocking at 1 MHz
 Antenna diversity and T/R switch control
 Highly configurable packet handler
 TX and RX 64 byte FIFOs
 Auto frequency control (AFC)
 Automatic gain control (AGC)
 Low BOM
 Low battery detector
 Temperature sensor
 20-Pin QFN package
 IEEE 802.15.4g compliant
 FCC Part 90 Mask D, FCC part 15.247, 15,231, 15,249, ARIB T-108, T-96, T-67, RCR STD-30, China regulatory
 ETSI Class-I Operation with SAW
Si446x应用:
 Smart metering (802.15.4g & MBus)
 Remote control
 Home security and alarm
 Telemetry
 Garage and gate openers
 Remote keyless entry
 Home automation
 Industrial control
 Sensor networks
 Health monitors
 Electronic shelf labels

图1. Si446x系列框图

图2.Si4461直接连接应用电路图

图3.Si4463单个天线和RF开关应用电路

Si4461 868 MHz无线开发板EZRadioPRO
The Si4461 development kit provides the tools necessary to evaluate using the Si4461 EZRadioPRO low current RF transceiver operating at the 868 MHz frequency. Silicon Labs also offers the 4463C-915-PDK which is a similarly complete development kit using the Si4461 EZRadioPRO low current transceiver operating at the 868 MHz frequency.
Both kits are based on a new C8051F930 motherboard (WMB-F930-PDK) and new RF pico boards. The WMB-F930-PDK provides standalone demonstration and software development platform for EZRadioPRO wireless devices
The development kit includes:
(2) C8051F930 Motherboards
(2) Si4461 868 MHz Test Cards
(2) C8051F930 MCU Cards
(2) 868 MHz Antennas
(2) USB mini cables
(4) AA batteries
This user’s guide describes the development kits of the EZRadioPRO wireless development kit family. Each kit contains two RF nodes based on the Wireless Motherboard to support evaluation and development of sub-GHz RF links with the different EZRadioPRO devices. Table 1 lists the RF pico boards of the kits that use the latest C2A revision of the EZRadioPRO ICs. Table 2 lists the RF pico boards of the obsolete kits that use the previous B1B revision of the EZRadioPRO ICs. Table 3 lists the content that is common to all kits.