2 March 2010


Avago launches 6GHz broadband InGaP HBT gain blocks

Avago Technologies Ltd of San Jose, CA, USA, which designs and supplies analog semiconductor devices (with a focus on III-V based products), has launched two general-purpose InGaP hetero-junction bipolar transistor (HBT) monolithic microwave integrated circuit (MMIC) gain block amplifiers for use in wireless applications.

The AVT-51663/53663 gain blocks, which operate within the DC to 6000MHz frequency band, can be used as either a broadband gain block or a driver amplifier. These gain blocks target cellular infrastructure applications, but can be also be used in other wireless applications such as base-stations, WiMAX, WLAN, cable TV (CATV), satellite TV and set-top boxes.

Internally matched to 50-Ohms, the gain block amplifiers were designed in Darlington configuration, housed in an industry-standard six-lead SOT-363 surface-mount plastic package. The Darlington feedback structure provides inherent broad bandwidth performance, resulting in a useful operating frequency range of up to 6GHz, suiting small-signal gain cascades or IF amplification. These gain blocks also feature easy installation and only require DC blocking capacitors, RF choke, biasing resistors and bypass capacitors for operation. In addition, no additional RF matching components are required to achieve broadband performance.

The new gain block amplifiers were developed using InGaP HBT technology, which offers high reliability, temperature stability and consistent performance, Avago says. At a typical operating condition of 5V and 37mA, the AVT-51663 delivers performance of 19.0dB gain, 24dBm output third-order intercept point (OIP3) and 12.5dBm output power at 1dB gain compression (P1dBm) and 3.2dBm noise figure at 2000MHz. The AVT-53663 operates at 5V and 48mA to deliver 19.5dB gain, 5dBm OIP3, 15dBm P1dB and 3.2dB noise figure at 2000MHz.

Pricing for the AVT-51663 and AVT-53663 broadband high-linearity gain blocks is from $0.31 and $0.33, respectively, in 10,000 unit volumes.

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