New Integrated DVGAs Deliver SMT Convenience for 3G / 4G / BTS / PtP Applications
TriQuint Semiconductor  has released two compact, digitally-controlled variable gain amplifiers (DVGAs) that integrate key functionality and can reduce BOM (bill of material) part counts. These high-performance solutions provide receiver or transmitter gain control in base station transceivers, repeaters, point-to-point microwave radios, and satellite communications terminals. They are also an excellent choice for any application that requires automatic gain control to increase system dynamic range.
The TQM829007  operates from 600 to 1000 MHz while the TQM879008  operates from 1.5 to 2.7 GHz. Both are highly-integrated modules that simplify circuit design by combining all required components within leadless 6x6mm, industry-standard SMT packages. The modules include gain blocks, a highly-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.
Today’s transceivers require the highest possible levels of functional integration with high performance to cost-effectively simplify RF design and manufacturing. The TQM829007 and TQM879008 are designed to achieve this goal, eliminating the need for commonly-used external components found in discrete designs to provide a complete gain-control solution optimized for best performance. They are also 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 new TQM829007 and TQM879008 are in production. Fully-assembled evaluation fixtures (including a USB control board and related software) are available. Contact TriQuint  for product details or go to www.triquint.com/sales  to locate a sales representative or distributor closest to you. Please visit our website for product updates and to register for TriQuint’s quarterly newsletter .
Posted by Ron M. Seidel, Editorial Intern
April 26, 2012