CMX940T1

Product Description

The CMX940 is a low-power high performance Frac-N PLL with fully integrated wideband VCO and programmable output divider, generating RF signals over a continuous frequency range of 49 MHz to 2040 MHz. It has two single-ended RF outputs to support Tx and Rx sub-systems. A configurable reference path can be used to minimise close-in phase noise and mitigate integer and fractional boundary spurious. The IC is configured by an SPI compatible C-BUS serial bus.

Available in a 48-pin 7x7 mm LGA package, CMX940 is highly integrated to reduce component count and PCB board area, requiring only loop filter and clock reference to provide a complete and very compact RF synthesizer solution. Low operating voltage and low power consumption make it the perfect choice for a wide variety of portable and battery powered wireless applications, including digital narrowband two-way radio equipment compliant with ETSI standards.

Features

• RF output frequency 49 - 2040 MHz
• Low current consumption
• Supply voltage 3.0 - 3.6 V
• Supply voltage 3.0 - 3.6 V
• Low 1 Hz normalised PLL noise floor -225 dBc/Hz
• Phase noise -123 dBc/Hz, 25 kHz offset at 435 MHz
• Dual programmable RF outputs
• Low noise VCO -142 dBc/Hz, 1 MHz offset at 435 MHz
• 16- and 24-bit fractional-N PLL modes
• High comparison frequency 120 MHz
• Compatible with EN 300 113, EN 300 086