UMA1015AM - Low-power dual frequency synthesizer for radio communications

The UMA1015AM is a low-power dual frequency synthesizer for radio communications which operates in the 50 to 1100 MHz frequency range.

Each synthesizer consists of a fully programmable main divider, a phase and frequency detector and a charge pump.

• Two fully programmable RF dividers up to 1.1 GHz.
• Fully programmable reference divider up to 35 MHz.
• 2 : 1 or 1 : 1 ratio of selectable reference frequencies.
• Fast three-line serial bus interface.
• Adjustable phase comparator gain.
• Programmable out-of-lock indication for both loops.
• On-chip voltage doubler.
• Low current consumption from 3 V supply.
• Separate power-down mode for each synthesizer.
• Up to 4 open-.