EVB71121-433-C Melexis

EVB71121 300 to 930MHz Receiver Evaluation Board Description Features Application Examples Dual RF input for antenna space and General digital and analog RF receivers frequency diversity, LNA cascading or at 300 to 930MHz differential feeding Tire pressure monitoring systems Fully integrated PLL-based synthesizer (TPMS) 2nd mixer with image rejection Remote keyless entry (RKE) Reception of ASK or FSK modulated Low power telemetry systems signals Alarm and security systems Wide operating voltage and Active RFID tags temperature ranges Remote controls Very low standby current consumption Garage door openers Low operating current consumption Home and building automation Internal IF filter Internal FSK demodulator Average or peak detection data slicer mode RSSI output with high dynamic range for RF level indication Output noise cancellation filter MCU clock output High over-all frequency accuracy Ordering information Part No. (see also sec. 4) EVB71121-315-C EVB71121-868-C EVB71121-433-C EVB71121-915-C Note 1: Peak detection mode is default population. General Description The MLX71121 is a multi-band, single-channel RF receiver based on a double-conversion super- heterodyne architecture. It can receive FSK and ASK modulated signals. The IC is designed for general purpose applications for example in the European bands at 433MHz and 868MHz or for similar applications in North America or Asia, e.g. at 315MHz or 915MHz. REVISION 007 - JUNE 13, 2017 390127112101 EVB71121 300 to 930MHz Receiver Evaluation Board Description Contents Features ..................................................................................................................................................... 1 Application Examples ................................................................................................................................. 1 Ordering information ................................................................................................................................. 1 General Description ................................................................................................................................... 1 1. Theory of Operation ............................................................................................................................... 3 1.1. General................................................................................................................................................ 3 1.2. Technical Data Overview.................................................................................................................... 3 1.3. Block Diagram ..................................................................................................................................... 4 1.4. Operating Modes................................................................................................................................ 5 1.5. Frequency Range ................................................................................................................................ 5 1.6. LNA Selection ...................................................................................................................................... 5 1.7. Demodulation Selection ..................................................................................................................... 5 1.8. Data Slicer ........................................................................................................................................... 5 2. Frequency Planning ................................................................................................................................ 6 2.1. Calculation of Frequency Settings ..................................................................................................... 7 2.2. Standard Frequency Plans ................................................................................................................. 8 2.3. 433/868MHz Frequency Diversity ..................................................................................................... 8 3. Dual-Channel Application Circuits for FSK & ASK Reception ................................................................... 9 3.1. Peak Detector Data Slicer .................................................................................................................. 9 3.1.1. Component Arrangement Top Side (Peak Detection Data Slicer) ........................................... 10 3.2. Averaging Data Slicer Configured for Bi-Phase Codes .................................................................... 11 3.2.1. Component Arrangement Top Side (Averaging Data Slicer) .................................................... 12 3.3. Component List for Antenna Space Diversity ................................................................................. 13 3.4. PCB Layouts for Antenna Space Diversity ....................................................................................... 14 4. Board Versions ..................................................................................................................................... 14 5. Package Description ............................................................................................................................. 15 5.1. Soldering Information ...................................................................................................................... 15 6. Reliability Information .......................................................................................................................... 16 7. ESD Precautions ................................................................................................................................... 16 8. Contact................................................................................................................................................. 17 9. Disclaimer ............................................................................................................................................ 17 REVISION 007 - JUNE 13, 2017 390127112101