Hittite has introduced two wideband voltage-controlled oscillators (VCO): The HMC732LC4B and HMC733LC4B, which operate between 6 to 12 and 10 to 20 GHz, respectively. While complementing and extending the frequency range of Hittite’s GaAs HBT wideband VCO offerings, they are ideal for military radar and EW & ECM, as well as test and measurement.

The HMC732LC4B and HMC-733LC4B integrate a resonator, negative resistance device and varactor diode in a single 4 × 4 mm RoHS compliant SMT package. The Vtune port of the VCOs accepts an analog tuning voltage from 0 to +23 V and accommodates a very fast tuning bandwidth. The HMC732LC4B has SSB phase noise of -65 dBc/Hz at 10 kHz and -95 dBc/Hz at 100 kHz, whereas the HMC733LC4B has SSB phase noise of -60 dBc/Hz and -90 dBc/Hz at 10 and 100 kHz, respectively. Both provide a single ended RF output matched to 50 ohms.

The HMC732LC4B and HMC-733LC4B combine the attributes of low phase noise, compact size and wide tuning range, making them ideal for applications where tuning range and high performance are of primary importance. The HMC-732LC4B and HMC733LC4B operate from a single +5 V power supply, while drawing 54 and 70 mA of current, respectively. Their SMT footprint requires up to 90 percent less PC board area when compared to traditional MCM and discrete hybrid VCO approaches.

Hittite Microwave Corp.,
Chelmsford, MA
(978) 250-3343
RS No. 303