DC - 7 GHz Fractional-N Divider and Frequency Sweeper

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.

Applications

* Test Equipment

* Portable Instruments

* High Performance Fractional-N Frequency Synthesizers

with Ultra Low Spurious

* Stand-Alone Divider and/or Delta-Sigma Modulator

* Wideband: DC - 7 GHz Input

* 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 Size

* Programmable Seed

* Phase Step

* Integrated Frequency Sweeper

* 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

* 32 Lead 5×5mm SMT Package