EVB71122-868-C Melexis

EVB71122 300 to 930MHz Receiver Evaluation Board Description Features Application Examples Programmable PLL synthesizer General digital and analog RF receivers 8-channel preconfigured or fully at 300 to 930MHz programmable SPI mode Tire pressure monitoring systems Double super-heterodyne receiver (TPMS) nd architecture with 2 mixer as image Remote keyless entry (RKE) rejection mixer Low power telemetry systems Reception of FSK, FM and ASK Alarm and security systems modulated signals Active RFID tags Low shut-down and operating currents Remote controls AGC automatic gain control Garage door openers On-chip IF filter Home and building automation Fully integrated FSK/FM demodulator RSSI for level indication and ASK Evaluation board example detection nd 2 order low-pass data filter Positive and negative peak detectors Data slicer (with averaging or peak- detector adaptive threshold) 32-pin Quad Flat No-Lead Package (QFN) EVB programming software is available on Melexis web site Ordering information EVB71122-315-C EVB71122-868-C EVB71122-433-C EVB71122-915-C *SPI mode is default population **EVB71122-XXX-C with XXX = Reception frequency (315 or 433.92 or 868.3 or 915MHz). ***The evaluation board is supplied with an SMA connector. General Description The MLX71122 is a multi-channel RF receiver IC based on a double-conversion super-heterodyne architec-ture. It is designed to receive FSK and ASK modulated RF signals either in 8 predefined frequency channels or frequency programmable via a 3-wire serial programming interface (SPI). The IC is designed for a variety of applications, for example in the European bands at 433MHz and 868MHz or for the use in North America or Asia, e.g. at 315MHz, 447MHz or 915MHz. REVISION 007 - JUNE 13, 2017 390127112201 EVB71122 300 to 930MHz Receiver Evaluation Board Description Contents Features ..................................................................................................................................................... 1 Application Examples ................................................................................................................................. 1 Evaluation board example .......................................................................................................................... 1 Ordering information ................................................................................................................................. 1 General Description ................................................................................................................................... 1 1. Theory of Operation ............................................................................................................................... 4 1.1. General................................................................................................................................................ 4 1.2. EVB Data Overview ............................................................................................................................. 4 1.3. Block Diagram ..................................................................................................................................... 5 1.4. Enable/Disable in ABC Mode ............................................................................................................. 6 1.5. Demodulation Selection in ABC Mode .............................................................................................. 6 1.6. Programming Modes .......................................................................................................................... 6 1.7. Preconfigured Frequencies in ABC Mode ......................................................................................... 6 2. Functional Description ........................................................................................................................... 7 2.1. Frequency Planning ............................................................................................................................ 7 2.2. Calculation of Counter Settings ......................................................................................................... 8 2.2.1. Calculation of LO1 and IF1 frequency for Low Frequency Bands .............................................. 8 2.2.2. Calculation of LO1 and IF1 frequency for High Frequency Bands ............................................. 9 2.2.3. Counter Setting Examples for SPI Mode ..................................................................................... 9 2.2.4. Counter Settings in ABC Mode 8+1 Preconfigured Channels ............................................... 10 2.2.5. PLL Counter Ranges .................................................................................................................... 11 2.3. SPI Description .................................................................................................................................. 11 2.3.1. General ....................................................................................................................................... 11 2.3.2. Read / Write Sequences............................................................................................................. 12 2.3.3. Serial Programming Interface Timing ........................................................................................ 12 3. Register Description ............................................................................................................................. 13 3.1. Register Overview ............................................................................................................................ 13 3.1.1. Control Word R0......................................................................................................................... 15 3.1.2. Control Word R1......................................................................................................................... 16 3.1.3. Control Word R2......................................................................................................................... 17 3.1.4. Control Word R3......................................................................................................................... 17 3.1.5. Control Word R4......................................................................................................................... 18 3.1.6. Control Word R5......................................................................................................................... 18 REVISION 007 - JUNE 13, 2017 390127112201