CMX940T1

CMX940 is a low-power high performance Frac-N PLL with fully integrated wideband VCO generating RF signals over a range of 49 MHz to 2040 MHz. Using highly-configurable near noiseless clock multiplier technology to minimize close-in phase noise and mitigate integer and fractional boundary spurious. It has two level-controlled single-ended RF outputs to support Tx and Rx sub-systems.

Features: 

• RF output frequency 49 - 2040 MHz
• Low current consumption ~58 mA
• Supply voltage 3.0 - 3.6 V
• Low 1 Hz normalized PLL noise floor of -225 dBc/Hz
• Typical phase noise -122 dBc/Hz, 10 kHz offset at 520 MHz
• Dual programmable RF outputs
• Low noise VCO -141 dBc/Hz, 1 MHz offset at 520 MHz
• Automatic VCO selection and calibration
• 16 and 24-bit fractional-N PLL modes
• High comparison frequency up to 120 MHz
• Very fast frequency switching <50 µs
• Low level of spurious products -75 dBc (typ.)

Applications: 

• PMR / LMR
• Public Safety Radio
• Wireless Data Modem
• GNSS RTK
• Wireless Microphone
• Marine Radio
• Ham radio