Analog Devices Inc./Maxim Integrated

The HMC619 devices are GaAs, monolithic microwave integrated circuit (MMIC), and PHEMT distributed power amplifier die which operate between dc and 10 GHz. These amplifiers provide 11 dB or 12.8 dB of gain, ±37 dBm output IP3, and 27 dBm or 28 dBm of output power at 1 dB gain compression, while requiring 300 mA from a +12 V supply. Gain flatness is excellent at ±0.4 dB or ±0.5 dB from dc to 10GHz, making the HMC619 devices ideal for EW, ECM, radar, and test equipment applications. The HMC619 devices inputs/outputs are internally matched to 50 Ω, facilitating integration into multichip modules (MCMs). All chip data is taken with the chip connected via two 0.025 mm (1 mil) wire bonds of minimal 0.31 mm (12 mils) length.ApplicationsTelecom infrastructureMicrowave radio and VSATMilitary and spaceTest instrumentationFiber optics

The HMC620 devices are compact I/Q MMIC mixers that are available in a chip (HMC620) and a leadless Pb-free RoHS compliant SMT package (HMC620LC4), both of which can be used as either an image reject mixer (IRM) or a single sideband (SSB) upconverter. The mixers utilize two standard Hittite double-balanced mixer cells and a 90° hybrid fabricated in a GaAs metal semiconductor field effect transistor (MESFET) process. A low frequency quadrature hybrid was used to produce a 100 MHz upper sideband (USB) IF output. This product is a much smaller and more consistent alternative to hybrid style IRMs and SSBupconverter assemblies. All data for the HMC620 is taken with the chip mounted in a 50 Ω test fixture and includes the effects of 1 mil diameter × 20 mil length bond wires on each port. The HMC620LC4 is compatible with high volume surface mount manufacturing techniques.ApplicationsPoint-to-pointPoint-to-multipoint radioWiMAX and fixed wirelessVery small aperture terminal (VSAT)

The HMC624A is a 6-bit digital attenuator with a 31.5 dB attenuation control range in 0.5 dB steps.The HMC624A offers excellent attenuation accuracy and high input linearity over the specified frequency range from 100 MHz to 6.0 GHz. However, this digital attenuator features external ac grounding capacitors to extend the operation below 100 MHz.The HMC624A is integrated with two dies: a CMOS driver and a gallium arsenide (GaAs) RF attenuator. The CMOS driver provides both serial and parallel control of the RF attenuator. The device also features a user-selectable power-up state and a serial output port for cascading other serial controlled components.The HMC624A operates with a single positive supply voltage from 3 V to 5 V, and provides a CMOS-/TTL-compatible control interface.The HMC624A comes in a RoHS compliant, compact, 4 mm × 4 mm LFCSP package, and is pin compatible to theHMC1122except for the ACGx pins.ApplicationsCellular infrastructureMicrowave radios and very small aperture terminals (VSATs)Test equipment and sensorsIntermediate frequency (IF) and radio frequency (RF) designs

The HMC627ALP5E is a digitally controlled variable gain amplifier which operates from 50 MHz to 1 GHz, and can be programmed to provide anywhere from 11.5 dB attenuation, to 20 dB of gain, in 0.5 dB steps. The HMC627ALP5E delivers noise figure of 4.3 dB in its maximum gain state, with output IP3 of up to +36 dBm in any state. The dual mode gain control interface accepts either three wire serial input or 6 bit parallel word. The HMC627ALP5E also features a user selectable power up state and a serial output for cascading other Hittite serially controlled components. The HMC627ALP5E is housed in a RoHS compliant 5x5 mm QFN leadless package, and requires no external matching components.ApplicationsCellular / 3G InfrastructureWiBro / WiMAX / 4GMicrowave Radio & VSATTest Equipment & SensorsIF & RF Applications