Microchip MRF24WB0MA 2.4GHz Wi－Fi解決方案

Microchip公司的MRF24WB0MA/MRF24WB0MB是低功耗2.4 GHz, IEEE Std. 802.11b兼容的RF收發器模塊,表面安裝模塊(尺寸32mmx31mm),具有所有的RF元件如晶振,旁路和片壓無源元件,MAC,基帶,RF和功率放大器,以及支持AES和TKIP (WEP, WPA, WPA2安全)的硬件.數據速率領1和2Mbps,IEEE Std. 802.11b/g/n兼容,工作電壓2.7V–3.6V, ISM頻段2.400–2.484 GHz,DSSS調制,1Mbps的靈敏度-91dBm,輸出功率+10dBm可控,主要用在智能電表,消費類電子,遙控設備管理和零售業.本文介紹了MRF24WB0MA主要特性,方框圖,應用電路圖以及Wi-Fi通用演示板主要特性,電路圖和元件布局圖及主要元件.

The MRF24WB0MA and MRF24WB0MB are low-power,2.4 GHz, IEEE Std. 802.11-compliant, surface mount modules with all associated RF components – crystal oscillator, bypass and bias passives with integrated MAC, baseband, RF and power amplifier, and built-in hardware support for AES, and TKIP (WEP, WPA, WPA2 security). The integrated module design frees the designer from RF and antenna design tasks and regulatory compliance testing, ultimately providing quicker time to market.

The MRF24WB0MA module is approved for use with the integrated PCB meander antenna.

The MRF24WB0MB comes with an ultra miniature coaxial connector (U.FL) and is approved for use with a list of pre-certified antennas.

The MRF24WB0MA/MRF24WB0MB modules are designed to be used with Microchip’s TCP/IP software stack. The software stack has an integrated driver that implements the API that is used in the modules for command and control, and for management and data packet traffic.

The combination of the module and a PIC running the TCP/IP stack results in support for IEEE Standard 802.11 and IP services. This allows, the immediate implementation of a wireless web server.

The MRF24WB0MA/MRF24WB0MB modules have received regulatory approvals for modular devices in the United States (FCC), Canada (IC), and Europe (ETSI). The modular approval removes the need for expensive RF and antenna design, and allows the end user to place the modules inside a finished product and not require regulatory testing for an intentional radiator (RF transmitter). They also have Radio Type Approval Certification for Japan.

MRF24WB0MA主要特性:

• IEEE Std. 802.11-compliant RF Transceiver

• Serialized unique MAC address

• Data Rate: 1 and 2 Mbps

• IEEE Std. 802.11b/g/n compatible

• Small size: 21mm x 31mm 36-pin Surface Mount Module

• Integrated PCB antenna (MRF24WB0MA)

• External antenna option (MRF24WB0MB) with ultra miniature coaxial (U.FL) connector

• Range: up to 400m (1300 ft.)

• Easy integration into final product – accelerates product development, provides quicker time to market

• Radio regulation certification for United States (FCC), Canada (IC), Europe (ETSI) and Japan (ARIB)

• Wi-Fi® certified (WFA ID: WFA7150)

• Designed for use with Microchip microcontroller families (PIC18, PIC24, dsPIC33, and PIC32) with downloadable Microchip TCP/IP Stack Operational:

• Single operating voltage: 2.7V–3.6V (3.3V typical)

• Temperature Range: -20℃ to +85℃ extended commercial

• Simple, four-wire SPI interface with interrupt

• Low-current consumption:

- RX mode – 85 mA (typical)

- TX mode – 154 mA (+10 dBm typical)

- Sleep – 250 μA (typical)

- Hibernate –0.1 μA (typical)

RF/模擬特性:

• ISM Band 2.400–2.484 GHz operation

• 14 Channels selectable individually or domainrestricted

• DSSS Modulation

• Data Rate – 1000 kbps

• -91 dBm Typical sensitivity at 1 Mbps

• +10 dBm Typical output power with control

• Integrated low phase noise VCO, RF frequency synthesizer, PLL loop filter and PA

• Digital VCO and filter calibration

• Integrated RSSI ADC and I/Q DACs, RSSI readings available to host

• Balanced receiver and transmitter characteristics for low power consumption

MAC/Baseband Features:

• Hardware CSMA/CA access control, automatic ACK, and FCS creation and checking

• Automatic MAC packet retransmit

• Hardware Security Engine for AES and RC4-based ciphers

• Supports 802.1x, 802.1i security: WEP, WPA-PSK, and WPA-2-PSK.

MRF24WB0MA應用:

• Utility and Smart Energy

- Thermostats

- Smart Meters

- White Goods

- HVAC

• Consumer Electronics

- Remote Control

- Internet Radio

- Home Security

- Toys

• Industrial Controls

- Chemical Sensors

- HVAC

- Security Systems

- M2M Communication

• Remote Device Management

- Location and Asset Tracking

- Automotive