Back to CML Micro

CML Micro CMX940 RF Synthesizers

CML Micro CMX940 RF Synthesizers are low-power, high-performance Fraction-N PLL with fully integrated wideband VCO and programmable output dividers. These RF synthesizers generate RF signals over a continuous frequency range of 49MHz to 2040MHz. The CMX940 synthesizers have two single-ended RF outputs to support the Tx and Rx sub-systems. These RF synthesizer ICs are configured by an SPI-compatible C-BUS serial bus. The CMX940 synthesizers are available in a 7mm x 7mm LGA-48 package, reducing component count and PCB board area. These RF synthesizers are low noise general purpose 48.57MHz to 2.04GHz RF synthesizers. The CMX940 comes with a dual-loop architecture.

The CMX940 amplifiers feature low operating voltage and low power consumption making them perfect for a wide variety of portable and battery-  powered wireless applications. These synthesizers are highly integrated requiring only loop filter and clock reference to provide compact RF synthesizer solution. Applications include wireless data modem, general-purpose RF and IF, and marine radio.

Features

  • 49MHz to 2040MHz RF output frequency range
  • 120MHz high comparison frequency
  • Low current consumption
  • Very fast frequency switching <50µs
  • 3V to 3.6V supply voltage range
  • Compatible with EN 300 113 and EN 300 086
  • Low 1Hz normalized PLL noise floor -225dBc/Hz
  • 16- and 24-bit fractional-N Phase Locked Loop (PLL) modes
  • Phase noise -123dBc/Hz, 25kHz offset at 435MHz applications
  • Dual programmable RF outputs
  • Low noise VCO -142dBc/Hz, 1MHz offset at 435MHz
  • Low levels of spurious products
  • Automatic VCO selection and calibration

Applications

  • PMR / LMR (including ETSI-compliant radios)
  • Public safety radio
  • Wireless data modem
  • GNSS RTK
  • Wireless microphone
  • Marine radio
  • General purpose RF and IF

Block Diagram

Block Diagram - CML Micro CMX940 RF Synthesizers

Application Notes

Associated Product

CML Micro EV9400 Evaluation Board

Designed to evaluate low-power, high-performance CMX940 RF amplifiers with integrated VCOs.

Learn Moreabout CML Micro EV9400 Evaluation Board View Productsrelated to CML Micro EV9400 Evaluation Board
Published: 2021-01-06 | Updated: 2024-05-14