Catalog
DC - 7 GHz Fractional-N Divider and Frequency Sweeper
Key Features
• Wideband: DC - 7 GHz Input20-bit Frequency Divider
• 20-bit Frequency Divider
• Low Noise: -160 dBc/Hz
• Low Spurious: Largest Spurious - 95 dBc
• 48-bit 100 MHz Delta-Sigma Modulator (DSM)Configurable DSM SizeProgrammable SeedPhase Step
• Configurable DSM Size
• Programmable Seed
• Phase Step
• Integrated Frequency SweeperLinear, Coherent Sweeps2-Way, 1-Way, & User Defined Sweep ModesAutomatic or TriggeredProgrammable SeedSPI & External Triggering
• Linear, Coherent Sweeps
• 2-Way, 1-Way, & User Defined Sweep Modes
• Automatic or Triggered
• Programmable Seed
• SPI & External Triggering
• 5-GPIO's, can be used for External DSM
• Cycle Slip Prevention Support with PFD Chip (HMC984LP4E)
• Differential VCO Input & Divider Output
• Programmable Output Current Control:5 mA to 17.5 mA Open Collector Output Driver
• 5 mA to 17.5 mA Open Collector Output Driver
• 32 Lead 5×5mm SMT Package
Description
AI
HMC983LP5E is a fractional frequency divider targeted for fractional-N frequency synthesis, and stand-alone low noise frequency divider applications that require exceptional spurious performance.Although the HMC983LP5E can work with any VCO and/or compatible Phase Detector, best performance and features will be achieved when paired with the companion part, the HMC984LP4E.Fabricated in SiGe BiCMOS process, the HMC983LP5E features a 48-bit Delta Sigma Fractional Modulator (DSM) with programmable phase accumulator size, enabling precise control of frequency step size and resolution. Integrated DSM can generate frequencies with nearly 0 Hz frequency error. The DSM also includes a built-in programmable frequency sweep capability, with various automatic and user defined sweep modes and triggering options, including hardware trigger pin, or SPI trigger with optional delayed trigger.HMC983LP5E is a versatile part capable of various configurations. It has 5 general purpose I/Os (GPIOs). DSM outputs are made available from the GPIO port, enabling the HMC983LP5E to import and/or export DSM sequences for various configuration options.HMC983LP5E divider outputs are differential, open collector with programmable current to accommodate different off-chip loads.ApplicationsTest EquipmentPortable InstrumentsHigh Performance Fractional-N Frequency Synthesizerswith Ultra Low SpuriousStand-Alone Divider and/or Delta-Sigma Modulator
