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MRF89XA 数据表(PDF) 7 Page - Microchip Technology |
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MRF89XA 数据表(HTML) 7 Page - Microchip Technology |
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7 / 140 page  2010-2017 Microchip Technology Inc. Preliminary DS70000622D-page 7 MRF89XA 1.0 OVERVIEW Microchip's MRF89XA is a fully integrated, half-duplex, sub-GHz transceiver. This low-power, single-chip FSK and OOK baseband transceiver supports: • Superheterodyne architecture • Multi-channel, multi-band synthesizer with Phase Locked Loop (PLL) for easy RF design • Power Amplifier (PA) • Low Noise Amplifier (LNA) • I/Q two stage down converter mixers • I/Q demodulator, FSK/OOK • Baseband filters and amplifiers The simplified block diagram of the MRF89XA is illustrated in Figure 1-1. The MRF89XA is a good option for low-cost, high- volume, low data rate ( 200 kbps), and two-way short- range wireless applications. This device is a single-chip FSK and OOK transceiver capable of operating in the 863-870 MHz and 902-928 MHz license-free ISM frequency bands, and the 950-960 MHz frequency band. The low-cost MRF89XA is optimized for very low-power consumption (3 mA in Receive mode). It incorporates a baseband modem with data rates up to 200 kbps in FSK and 32 kbps in OOK. Data handling features include a 64-byte FIFO, packet handling, automatic CRC generation, and data whitening. The device also supports Manchester coding techniques. Its highly integrated architecture allows for minimum external component count while maintaining design flexibility. All major RF communication parameters are programmable and most of them may be dynamically set. The MRF89XA supports a stable sensitivity and linearity characteristics for a wide supply range and is internally regulated. The frequency synthesizer of the MRF89XA is a fully integrated integer-N type PLL. The oscillator circuit provided on the MRF89XA device provides the reference clock for the PLL. The frequency synthesizer requires only five external components, which include the PLL loop filter and the VCO tank circuit. Low-phase noise provides for excellent adjacent channel rejection capability, Bit Error Rate (BER), and longer communication range. The high-resolution PLL allows: • Usage of multiple channels in any of the bands • Rapid settling time, which allows for faster frequency hopping A communication link in most applications can be created using a low-cost 12.8 MHz crystal, a SAW filter, and a low-cost microcontroller. The MRF89XA provides a clock signal for the microcontroller. The transceiver can be interfaced with many popular Microchip PIC® microcontrollers through a 4-wire Serial Peripheral Interface (SPI), interrupts (IRQ0 and IRQ1), PLL lock, and clock out. The interface between the microcontroller and MRF89XA (a typical MRF89XA RF node) is illustrated in Figure 1-2. The MRF89XA supports the following digital data processing features: • Received Signal Strength Indicator (RSSI) • Sync Word recognition • Packet handling • Interrupt and flags • Different operating modes (Continuous, Buffered, and Packet) • Data filtering/whitening/encoding • Baseband power amplifier • 64-byte TX/RX FIFO The role of the digital processing unit is to interface the data to/from the modulator/demodulator and the microcontroller access points (SPI, IRQ and DATA pins). It also controls all of the Configuration registers. The receiver's Baseband Bandwidth (BBBW) can be programmed to accommodate various deviations and data rates requirements. An optional Bit Synchronizer (BitSync) is provided, to supply a synchronous clock and data stream to a companion microcontroller in Continuous mode, or to fill the FIFO with glitch-free data in Buffered mode. The transceiver is integrated with different power-saving modes and a software wake-up time through the host microcontroller to keep track of the activities, which reduce the overall current consumption and extends the battery life. The small size and low-power consumption of the MRF89XA makes it ideal for various short-range radio applications. The MRF89XA complies with European (ETSI EN 300- 220) and United States (FCC Part 15.247 and 15.249) regulatory standards. |
类似零件编号 - MRF89XA |
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类似说明 - MRF89XA |
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