Copyright: 1996 - 2024
BSEE - KB3UON
RF Cafe began life in 1996 as "RF Tools" in an AOL screen name web space totaling
2 MB. Its primary purpose was to provide me with ready access to commonly needed
formulas and reference material while performing my work as an RF system and circuit
design engineer. The World Wide Web (Internet) was largely an unknown entity at
the time and bandwidth was a scarce commodity. Dial-up modems blazed along at 14.4 kbps
while typing up your telephone line, and a nice lady's voice announced "You've Got
Mail" when a new message arrived...
All trademarks, copyrights, patents, and other rights of ownership to images
and text used on the RF Cafe website are hereby acknowledged.
My Hobby Website:
Hittite Press Release - April 14, 2011
Hittite's New Ultra-Low Noise Tri-Band Frequency PLLs with Integrated VCO
- Excellent Phase Noise & Spurious Products Performance is Ideal for Cellular/4G Infrastructure
MA, 04/14/2011 – Hittite Microwave Corporation, the world class supplier of complete MMIC based solutions for
communication & military markets has launched two full-featured Fractional-N PLLs with integrated Voltage
Controlled Oscillators (VCOs). The
HMC840LP6CE include a
wideband, low noise VCO with auto-calibration subsystem, low noise PFD and dividers, and a precision charge-pump.
exact frequency mode operation, deliver exceptional phase noise and industry-leading spurious performance while
consuming only 630 mW. No other pre-packaged PLL solution is capable of reliably delivering this level of phase
noise performance: -227 dBc/Hz Figure-Of-Merit (FOM) in fractional-N mode and -230 dBc/Hz FOM in integer-N mode.
The integrated double side band phase noise for these products is lower than -50 dBc. The RMS jitter is less than
phase detector (PD) features cycle slip prevention (CSP) technology to allow faster frequency hopping times. Ultra
low in-close phase noise and low spurious also allows wider loop bandwidths for faster frequency hopping and low
With common channel spacing (200 kHz, 20 kHz loop bandwidth), Spurious-Free Dynamic Range
(SFDR) of 78 dB is typical. Even under worst case conditions, with the synthesizer tuned very close to an integer
multiple of the comparison frequency, SFDR still exceeds 52 dB.
HMC837LP6CE is tunable
over three separate frequency bands: 1025 MHz to 1150 MHz, 2050 MHz to 2300 MHz, and 4100 MHz to 4600 MHz. The
HMC840LP6CE is tunable
over three separate frequency bands: 1310 MHz to 1415 MHz, 2620 MHz to 2830 MHz, and 5240 MHz to 5660 MHz. Both
HMC837LP6CE and the
HMC840LP6CE are housed
in 6 x 6 mm plastic leadless surface mount packages and provide excellent temperature stability from -40 °C to +85
°C. Released data sheets may be found at www.hittite.com. Samples and evaluation PC boards are available from
stock and can be ordered via the company's e-commerce site or via direct purchase order.
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, Microwave & Millimeterwave Communications, Military,
Test & Measurement, and Space markets. The Company is headquartered in Chelmsford, Massachusetts.
Hittite Microwave Corporation
20 Alpha Road
Chelmsford, MA 01824