8 GHz 16-Bit Fractional-N PLL

The HMC700LP4(E) is a SiGe BiCMOS fractional-N frequency synthesizer. The synthesizer includes a very low noise digital phase frequency detector (PFD), and a precision controlled charge pump.

The fractional synthesizer features an advanced deltasigma modulator design that allows both ultra-fine step sizes and very low spurious products. Spurious outputs are low enough to eliminate the need for costly Direct Digital Synthesis (DDS) references in many applications.

The HMC700LP4(E) phase-frequency detector (PFD) features cycle slip prevention (CSP) technology that allows faster frequency hopping times.

Ultra low in-close phase noise and low spurious also permit architectures with wider loop bandwidths for faster frequency hopping and low micro-phonics. FSK mode allows the synthesizer to be used as a simple low cost direct FM transmitter source.

Applications

* Base Stations for Mobile Radio

* WiMAX

* Test & Measurement

* CATV Equipment

* Phased Array Applications

* Simple FSK Links

* DDS Replacement

* 8 GHz, 16 bit prescaler

* Fractional or Integer Modes

* 24 bit step size resolution, 3 Hz typ

* Ultra Low Phase Noise

* 6 GHz; 50 MHz Ref.

-103 / -108 dBc/Hz @ 20 kHz (Frac/INT)

* Figure of Merit (FOM)

-221/-227 dBc/Hz (Frac/INT)

* 225 MHz, 14bit reference path input

* Direct FSK Modulation Mode

* Cycle Slip Prevention

* Read / Write Serial Port, Chip ID

* 24 Lead 4x4mm SMT Package: 16mm²