CML Micro CMX7164 Multi Mode Wireless Data Modems
CML Micro CMX7164 Multi-Mode Wireless Data Modems are half-duplex devices supporting 4/16/32/64 QAM, 2/4/8/16 FSK, GMSK/GFSK, and V.23 modes in multiple channel spacings under host control. The CMX7164 includes an integrated analog interface that supports direct connection to zero IF I/Q radio transceivers with few external components; no external codecs are required. The C-BUS/SPI master interface expands host C-BUS/SPI ports to control external devices. The CMX7164 utilizes FirmASIC® component technology. A Function Image™ data file configures on-chip sub-systems and defines the device’s function and feature set.
Features
- Half-duplex modem supports multiple modulations and channel spacings
- 7164FI-1.x
- GMSK/GFSK with BT=0.5, 0.3, 0.27 or 25
- Over-air compatible with FX/MX909B and CMX7143FI-1.x
- 2x frame sync detectors
- Automatic frame sync detect
- Rx carrier frequency correction
- Receive signal quality measurement
- 7164FI-2.x
- 2/4/8/16-FSK up to 10k symbols/s in 25kHz e.g. 40kbps for 16-FSK
- Compatible FEC for CMX7143 and FX/MX919B 4-FSK (not 2-FSK)
- Over-air compatibility with CMX969 for RD-LAP Tx/Rx
- 2x frame sync detectors
- Automatic frame sync detect
- Rx carrier frequency correction
- Receive signal quality measurement
- 7164FI-4.x
- 4/16/32/64 QAM up to 96kbps in 25kHz
- Adaptive Coded Modulation (ACM) features allow over-the-air commands and on-the-fly changes to modulation rates
- Different rates, robust FEC choices
- Channel estimation and equalization
- 2x frame sync detectors
- Automatic frame sync detect
- Rx carrier frequency and phase correction
- Receive signal quality measurement
- 7164FI-6.x
- 23x modulations
- 2x frame sync detectors
- Automatic frame sync detect
- Rx carrier frequency correction
- Receive signal quality measurement
- High-performance I/Q radio analog interface
- Tx and Rx: Direct connect to zero IF transceiver
- Simple external RC filters
- Digital IF filter reconfigures for multiple RF channel spacings (Rx)
- Deviation control without manual trim (Tx)
- I/Q trims
- C-BUS host serial interface
- SPI-like with register addressing
- Read/Write 128-byte FIFOs and data buffers streamline transfers and relax host service latency
- Auxiliary functions
- 4x 10-bit DACs
- Autonomous RAMDAC sequencer
- Automatic support for DC calibration of CMX998
- 4x 10-bit ADCs
- ADC averaging and trip on high/low ‘watch’ modes
- 4x GPIO
- Sequence GPIO on Tx or Rx trigger
- Start Tx on digital trigger input
- Master C-BUS/SPI serial interface
- For external slave devices e.g. RF transceiver and synthesizer
- Pass-through mode expands host C-BUS/SPI capacity
- 2x synthesised clock generators
- Low power 3.3V operation with Powersave functions
- Small 64-pin VQFN and LQFP packages
Applications
- High-performance narrowband data radio
- Telemetry/SCADA/data modems
- 25kHz to 25kHz RF channel spacing
- Compatible worldwide e.g. ETSI, FCC, ARIB,
- FCC Part 90 per spectral efficiency requirements
- Digital Software Defined Radio (SDR)
- High-speed wireless data
- Mobile data over fading channels
- V.23 compatibility for interoperability with legacy equipment in the field
Specifications
- 3MHz to 12.288MHz frequency range
- Maximum total power dissipation at +25°
- 1690mW for 64-pin LQFP package
- 3500mW for 64-pin VQFN package
- Input impedance
- 10kΩ to 140kΩ enabled
- 200kΩ typical muted/power saved
- 50kΩ typical output impedance
- 20pF input capacitance
- Typical supply current ranges
- 1µA operating
- 1.4mA to 34.1mA in Rx Mode
- 1.3mA to 11.1mA in Tx Mode
- -40°C to +85°C operating temperature range
Videos
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Published: 2019-11-19
| Updated: 2023-08-04