HMC258_09

HMC258 v03.1007 GaAs MMIC SUB-HARMONICALLY PUMPED MIXER, 14 - 21 GHz Features Integrated LO Amplifier: 0 dBm Drive Sub-Harmonically Pumped (x2) LO High 2LO/RF Isolation: 40 dB Die Size: 0.85 x 1.15 x 0.1 mm Typical Applications The HMC258 is ideal for: • Microwave Point-to-Point Radios 3 MIXERS - SUB-HARMONIC - CHIP • VSAT • SATCOM Functional Diagram General Description The HMC258 chip is a compact sub-harmonically pumped (x2) single ended MMIC mixer with an integrated LO amplifier which can be used as an upconverter or downconverter. The chip utilizes a GaAs MESFET technology that results in a small overall chip area of 0.9mm2. The 2LO to RF isolation is excellent eliminating the need for additional filtering. The LO amplifier is a single bias (+5V) two stage design with only 0 dBm drive requirement. A less stringent oscillator design is made possible by the low LO drive and sub-harmonic nature of the chip. All data is with the chip in a 50 ohm test fixture connected via 0.025 mm (1 mil) diameter wire bonds of minimal length