Analog Devices

The HMC960LP4E is a digitally programmable dual channel variable gain amplifier. It supports discrete gain steps from 0 to 40 dB in precise 0.5 dB steps. It features a glitch free architecture to provide exceptionally smooth gain transitions. The device has matched gain paths which provide excellent quadrature balance over a wide signal bandwidth.The HMC960LP4E provides an SPI programmable input impedance of 100Ω differential or 400Ω differential (default).Externally controlled common mode output feature enables the HMC960LP4E to provide a flexible output interface to other parts in the signal path. Gain can be controlled via either a parallel interface (GC[6:0]) or via the read/write serial port (SPI).Housed in a compact 4x4mm (LP4) SMT QFN package, the HMC960LP4E requires minimal external components and provides a low cost alternative to more complicated switched amplifier architectures.ApplicationsBaseband I/Q TransceiversDirect Conversion & Low IF TransceiversDiversity ReceiversADC DriversAdaptive Gain Control

The HMC962LC4 is a self-biased GaAs MMI C Low Noise Amplifier housed in a leadless 4x4 mm ceramic surface mount package. The amplifier operates between 7.5 and 26.5 GHz, providing 13 dB of small signal gain, 2.5 dB noise figure, and output IP 3 of +23 dBm, while requiring only 70 mA from a +3.5 V supply. The P1dB output power of +13 dBm enables the LNA to function as a LO driver for balanced, I/Q or image reject mixers. The HMC962LC4 also features I/Os that are DC blocked and internally matched to 50 Ohms, making it ideal for high capacity microwave radios and VSAT applications.ApplicationsPoint-to-Point RadiosPoint-to-Multi-Point RadiosMilitary & SpaceTest Instrumentation

The HMC963LC4 is a self-biased GaAs MMIC Low Noise Amplifier housed in a leadless 4x4 mm ceramic surface mount package. The amplifier operates between 6 and 26.5 GHz, providing 20 dB of small signal gain, 2.5 dB noise figure, and output IP3 of +18 dBm, while requiring only 45 mA from a +3.5 V supply. The P1dB output power of +10 dBm enables the LNA to function as a LO driver for balanced, I/Q or image reject mixers. The HMC963LC4 also features I/Os that are DC blocked and internally matched to 50 Ohms, making it ideal for high capacity microwave radios and VSAT applications.ApplicationsPoint-to-Point RadiosPoint-to-Multi-Point RadiosMilitary & SpaceTest Instrumentation

The HMC967LP4E is a compact GaAs MMIC I/Q downconverter in a leadless RoHS compliant SM T package. This device provides a small signal conversion gain of 15 dB with a noise figure of 2.5 dB and 25 dBc of image rejection across the frequency band. The HMC967LP4E utilizes an LNA followed by an image reject mixer which is driven by an active x2 multiplier. The image reject mixer eliminates the need for a filter following the LNA, and removes thermal noise at the image frequency. I and Q mixer outputs are provided and an external 90° hybrid is needed to select the required sideband. The HMC967LP4E is a much smaller alternative to hybrid style image reject mixer downconverter assemblies, and is compatible with surface mount manufacturing techniques.ApplicationsPoint-to-Point & Point-to-Multi-Point RadioMilitary Radar, EW & ELINTSatellite Communications

The HMC974LC3C is a silicon germanium (SiGe) monolithic, ultra fast window comparator that features reduced swing positive emitter-coupled logic (RSPECL) output drivers that are level latched. Three output ports detect whether an analog input signal is above, below, or between two reference levels supplied at the input.The outputs are single-ended negative logic. Incorporating two proven comparators at the input provides good dc and dynamic matching and reduces the input capacitance. The reduced swing output stages are designed to directly drive 400 mV into 50 Ω terminated to a voltage (VTERM= VCCO− 2 V).HMC974LC3C features high speed latches that can either be enabled to latch the output data or left in the track mode to implement a tracking window comparator.ApplicationsAutomatic test equipment (ATE)High speed instrumentationClock and data restorationSemiconductor test systemsThreshold detection in electronic warfare systems

The HMC976LP3E is a BiCMOS ultra low noise linear voltage regulator. The high Power Supply Rejection Ratio (PSRR) in the 0.1 MHz to 10 MHz range provides excellent rejection of any preceding switching regulator or other power supply noise. The voltage output is ideal for frequency generation subsystems including Hittite’s broad line of PLLs with integrated VCOs. The output voltage can be adjusted lower than the default value by using one external resistor.The output can be set to 5V by grounding the HV pin. The regulator can be powered down by the TTL-compatible Enable input. The HMC976LP3E is housed in a 3x3mm QFN SMT package.ApplicationsTest InstrumentationMilitary Radios, Radar and ECMBasestation InfrastructureUltra Low Noise Frequency GenerationFractional-N Synthesizer SupplyMixed-Signal Circuit Supply

The HMC980LP4E is an active bias controller that can automatically adjust the gate voltage of an external amplifier to achieve constant drain current. Using an integrated controller, the HMC980LP4E allows safe power-up/power-down, and disable/enable of an external amplifier, ensuring the safe powering of the amplifier. The HMC980LP4E can be used to bias any enhancement or depletion type Class A amplifier operating with drain voltages from 5 V to 16.5 V and drain currents up to 1.6 A, thus offering a complete biasing solution.The HMC980LP4E allows stable RF amplifier biasing over supply, temperature, and process variations, and eliminates the required calibration procedures usually employed to prevent RF performance degradation due to variations in amplifier drain current.The HMC980LP4E is housed in an RoHS compliant 4 mm × 4 mm LFCSP leadless package with an exposed backside pad to improve thermal characteristics.APPLICATIONSMicrowave radio and very small aperture terminals (VSATs)Military and spaceTest instrumentationFiber optic modulator driver biasingCATV laser driver biasingCellular base stationWireless infrastructure equipment

HMC981LP3E is an active bias controller that automatically adjusts the gate voltage of an external amplifier to achieve constant bias current. It can be used to bias any enhancement and depletion type amplifiers operating in Class-A regime with Drain voltages from 4V to 12V and drain currents up to 200mA, offering a complete biasing solution.HMC981LP3E achieves excellent bias stability over supply, temperature and process variations, and eliminates the required calibration procedures usually employed to prevent RF performance degradation due to such variations.The HMC981LP3E is housed in an RoHS compliant 3x3 mm QFN leadless package with an exposed backside pad to improve thermal characteristics.ApplicationsMicrowave Radio & VSATMilitary & SpaceTest InstrumentationFiber Optic Modulator Driver BiasingCATV Laser Driver Biasing