Catalog
14 GHz 16-bit Fractional-N PLL with Sweeper
Key Features
• 24-Bit Step Size Resolution, 6 Hz typ
• Ultra Low Phase Noise
• 12 GHz, 50 MHz Ref.
-98 / -103 dBc/Hz @ 20 kHz
• (Frac / Integer)
• Auto & Triggered Sweeper Functions
• Cycle Slip Prevention (CSP) for Fast Settling
• Autotune Support for External Step Tuned VCOs
• Multi-VCO Support
• 40 Lead 6x6mm SMT Package: 36mm²
Description
AI
The HMC702 is a SiGe BiCMOS fractional-N frequency synthesizer. The synthesizer includes a 8GHz 16-bit RF N-Divider, a 24-bit delta-sigma modulator, a very low noise digital phase frequency detector (PFD), and a precision controlled charge pump. In addition the synthesizer supports an external step tuned VCO.The fractional synthesizer features an advanced delta-sigma modulator design that allows ultra-fine frequency step sizes. The synthesizer features the ability to alter both the phase-frequency detector (PFD) gain and the cycle slipping characteristics of the PFD. This feature can reduce the time to arrive at the new frequency by 50% vs. conventional PFDs. Ultra low in-close phase noise also allows wider loop bandwidths for faster frequency hopping.The synthesizer contains a built-in linear sweeper function, which allows it to perform frequency chirps with a wide variety of sweep times, polarities and dwells, all with an external or automatic sweep trigger.A General Purpose Output (GPO) bus supports the use of multiple VCO s. In addition the synthesizer has a number of auxiliary clock generation modes that can be accessed via the GPO.ApplicationsBase Stations for Mobile Radio(GSM, PCS, DCS, CDMA, WCDMA)Wireless LANs, WiMaxCommunications Test EquipmentCATV EquipmentFMCW SensorsAutomotive RadarPhased-Array Systems
