Microwave Technology's MPS-002701-84 variable gain amplifier (VGA) offers an exceptionally broad frequency range for a surface-mount VGA. While some other, comparable surface-mount VGAs operate up to 2 GHz, this amplifier operates with good gain flatness from 3 MHz to 2700 MHz (see the figure). Moreover, the VGA is operational down to nearly 100 kHz. Capable of replacing existing devices built in the TO-5 metal can, the MPS-002701-84 comes in a ceramic SOT-8 that measures 0.160 by 0.200 inches.

The GaAs FET amplifier operates with +5-V bias and features an IP3 of 34 dBm, a P1db of 20 dBm, and a 30% power-added efficiency all typical values. Small signal gain is 11.5 dB typical and noise figure is 5.0 dB typical from 100 MHz to 2700 MHz. The part also offers 50-Ohm output impedance. Many of this VGA's specs including gain vs. control voltage are similar to those of the company's MPS-003001-87. However, the latter device specifies operation from 20 MHz to 3000 MHz and features more costly, fully hermetic packaging.

In low volumes, the MPS-002701-84 is priced around $40, which is said to be one-third of equivalent competitive units.

For more information, see www.mwtinc.com or contact the company at 510-651-6700.