TriQuint Semiconductor, Inc has released two digitally-controlled variable gain amplifiers (DVGAs) that are designed to integrate functionality and reduce bill of material (BOM). These products provide receiver or transmitter gain control in base station transceivers, repeaters, point-to-point microwave radios, and satellite communications terminals.
The TQM829007 DVGA operates from 600 to 1000 MHz while the TQM879008 operates from 1.5 to 2.7GHz. Both, according to the manufacturer, are integrated modules that simplify circuit design by combining all required components within leadless 6x6mm, industry-standard SMT packages. Specifically, the modules include gain blocks, a linear amplifier, matching components, bias chokes and blocking capacitors, as well as a digitally-controlled, 6-bit attenuator that varies amplifier gain in 0.5 dB steps (across a 31.5 dB range) via a serial programming interface (SPI). The new DVGAs operate over a temperature range of -40o to +85° C and have a minimum MTTF of 1,000 years at a mounting temperature of +85º C.
The TQM829007 and TQM879008 are pin-compatible with TriQuint’s TQM879006 DVGA that covers 1.4 to 2.7 GHz and provides 31dB of gain control, +25.4dBm RF output and a 1.5dB noise figure.
The TQM829007 complements other TriQuint devices with similar performance at key cellular frequencies including the TQM879006 (1.4-2.7 GHz) and TQM879008 (1.5-2.7 GHz.)
The TQM829007 and TQM879008 are in production. Fully-assembled evaluation fixtures (including a USB control board and related software) are available.
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