Hittite's New PLL Chip Set for Ultimate Spurious & Phase Noise Performance
-- 48-bit Delta-Sigma Modulator, Built-in Frequency Sweeper
Chelmsford, MA, 12/5/2011 - Hittite Microwave Corporation, the world class supplier of complete MMIC based
solutions for communication & military markets announces the release of a new market leading PLL chip set. The
HMC983LP5E DC to 7 GHz Fractional-N Divider and Frequency Sweeper and the
HMC984LP4E Digital Phase-Frequency Detector and Charge Pump form a high performance PLL chip set solution
targeted at PLL and Frequency Modulated Continuous Wave (FMCW) sweeper applications requiring ultimate
HMC983LP5E integrates the industry’s largest programmable 48-bit Delta-Sigma Modulator which allows the
combined PLL to achieve unparalleled fractional frequency resolution of 180 nHz. A built-in frequency sweeper
enables the combined PLL to generate identical, coherent, FMCW frequency sweeps that can be linear, user-defined,
automatic or triggered.
HMC984LP4E provides an ultra low noise phase detector and charge pump capable of operating at high phase
detector frequencies of 125 MHz in fractional mode, and 175 MHz in integer mode. This capability enables the PLL
chip set to utilize wider loop bandwidths which result in better phase noise performance, faster PLL locking
times, and faster frequency sweeps. The PLL chip set phase noise Figure of Merit performance is -231 dBc/Hz in
integer mode and -227 dBc/Hz in fractional mode.
HMC983LP5E and the
HMC984LP4E can be used separately in stand-alone applications, partitioning the PLL building blocks into two
distinct devices achieves superb isolation and results in market leading spurious emissions performance exceeding
-60 dBc/Hz inside the loop bandwidth. Both the
HMC983LP5E and the
HMC984LP4E are housed in plastic leadless surface mount packages and provide excellent temperature stability
over the -40 °C to 85 °C operating range.
Samples and evaluation PC boards for all SMT packaged products are available from stock and can be
ordered via the company’s e-commerce site or via direct purchase order. Released data sheets are available on-line
About Hittite Microwave
Hittite Microwave Corporation is an innovative designer and manufacturer of high performance integrated circuits,
or ICs, modules, subsystems and instrumentation for technically demanding digital, RF, microwave and
millimeterwave applications covering DC to 110 GHz. The Company's standard and custom products apply analog,
digital and mixed-signal semiconductor technologies, which are used in a wide variety of wireless / wired
communication and sensor applications for Automotive, Broadband, Cellular Infrastructure, Fiber Optics &
Networking, Microwave & Millimeterwave Communications, Military, Test & Measurement, and Space markets. The
Company is headquartered in Chelmsford, Massachusetts.