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Test and Measurement

Hittite Introduces a New Variable Gain Amplifier Product Line

January 17, 2011
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Hittite Microwave Corporation, the world class supplier of complete MMIC based solutions for communication & military markets, announces a family of dual mode digitally controlled variable gain amplifiers (DVGA) for microwave radio and military applications that operate in the frequency band of DC to 6 GHz. These innovative digital variable gain amplifiers are an ideal choice for use in cellular infrastructure, test and measurement or military radio systems where an accurate signal level control and a low noise figure contribution is required. The HMC625LP5E is a 0.5dB LSB GaAs MMIC 6-Bit digital variable gain amplifier that delivers a selectable gain range of 31.5dB and an output 1 dB compression point of +19dBm. Its excellent output third order intercept point of +33 dBm makes the HMC625LP5E a popular choice within many transceivers that operate within the DC to 6 GHz frequency range. The HMC627LP5E is a 6-bit digital variable gain amplifier that delivers peak performance below 1GHz with 20dB of gain control, +36dBm OIP3 and a low 4.3dB noise figure contribution is achieved. The HMC625LP5E and the HMC627LP5E incorporate a dual mode interface that is CMOS/TLL compatible and accepts either 3-wire serial input or a 6 bit parallel word. For higher gain requirements, the HMC626LP5E provides 43dB of gain control between DC to 500MHz and 35dB from 500MHz to 1GHz. In addition to the attenuation range of 31.5 dB, the HMC626LP5E provides an excellent noise figure performance of 4dB and a typical OIP3 of +36dBm. This single positive control line DVGA achieves DC operation making it suitable for a wide variety of RF and IF applications. The HMC625LP5E, HMC626LP6E and HMC627LP5E are conveniently housed in a 5x5 mm RoHS compliant QFN leadless package, require no external matching components and are specified for operation over -40°C to +85°C. Samples are available from stock and can be ordered via the company’s e-commerce site or via direct purchase order. Released data sheets are available on-line at www.hittite.com.

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