Hittite Develops New 3.3V Wideband PLL With Integrated VCO
Significant Power Savings with Industry Leading Phase Noise & Spurious Performance
Hittite Microwave Corporation, a world class supplier of complete MMIC based solutions for communication & military markets, has developed the HMC832LP6GE, a 3.3V Wideband Fractional-N PLL with Integrated VCO that generates continuous fractional frequencies between 25 MHz and 3 GHz. The HMC832LP6GE offers low power consumption of 560 mW while featuring industry leading phase noise and spurious performance. It also includes innovative programmable performance technology that allows designers to further reduce current consumption if demands on the noise floor can be relaxed.
With industry leading phase noise (-110 dBc/Hz at 3 GHz) and spurious performance, across all frequencies, the HMC832LP6GE helps designers minimize blocker effects, improve receiver sensitivity and increase transmitter spectral purity. The best in class EVM performance satisfies the most demanding applications in cellular and microwave backhaul markets. When used as a LO in the IF stage of point-to-point microwave applications, the HMC832LP6GE limits phase noise contribution to the system SNR budget, and enables radio designs which utilize the highest constellations, such as 2048 and 4096 QAM. In OFDM systems, such as LTE and WiMAX, the HMC832LP6GE ensures that Inter Carrier Interference (ICI) caused by the LO phase noise does not limit system SNR, thereby providing more design options and reducing the need for DSP resources associated with Common Phase Error (CPE) correction and ICI mitigation.
Industry leading spurious performance simplifies radio design and enables radio designers to achieve maximum performance. Unparalleled in the industry, the HMC832LP6GE features less than -55 dBc/Hz inside the loop bandwidth spurious performance, and significantly better performance outside the loop bandwidth (<-90 dBc/Hz). More importantly, the HMC832LP6GE does not emit any channel spurs in Exact Frequency Mode; critical since Exact Frequency Mode is the preferred mode of operation of the PLL/VCO in cellular and microwave radio markets. In these markets, users often program channel step size according to the channel spacing of the particular standard of the radio. Any channel spurs then become interference and/or blockers to adjacent radio channels.
For applications that are even more sensitive to spurious, the HMC832LP6GE can be placed in a cascaded configuration to operate virtually spurious free (typically <-90 dBc/Hz spurious) at any frequency and any offset.
The HMC832LP6GE integrated phase detector and delta-sigma modulator can operate up to 100 MHz frequency and allow wider loop bandwidths for optimized performance and lock time. Exact Frequency Mode enables users to generate fractional output frequencies with 0 Hz frequency error. The device includes Fast Frequency Hopping that can execute any size frequency change in ~30 µs and Output Mute function, with 50 dB or better isolation over the full frequency range, to automatically mute the output during frequency changes when the device is not locked. The outputs can be configured as a differential pair or two single-ended outputs if more devices need to be driven with a single LO. The 12 dB of total RF output power control range can be programmed in fine 1 dB steps. The HMC832LP6GE is footprint compatible with the industry leading HMC830LP6GE PLL/VCO. 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 at www.hittite.com.
About Hittite Microwave Corporation
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.
SOURCE: Hittite Microwave Corporation