news digest ♦ RF Electronics
“These two new LNA series, along with the other high-performance products we have introduced leading up to IMS 2011, demonstrate our commitment to extend our leading LNA portfolio for the wireless infrastructure market and raise the bar for noise figure and overall performance,” said James Wilson, senior director of marketing for wireless products at Avago. “We continue to work with our customers to develop highly-integrated solutions that streamline the design process and help them to keep up with continuously evolving cellular standards.”
In addition to LNAs, the broad range of solutions in the portfolio includes Film Bulk Acoustic Resonator (FBAR) filters, gain blocks, driver amplifiers, and WaferCap amplifiers and detectors, as well as modules that integrate multiple technologies.
The high-linearity MGA-63xP8 LNA series integrates active bias circuitry and a power down function, simplifying design by eliminating the need for external discrete components to perform the same functions. The series offers high-gain performance consistent across 700-2600 MHz, with the MGA-636P8 device operating from 450- 1500MHz, while the MGA-637P8 and MGA-638P8 operate from 1500-2500 MHz and 2500-4000 MHz, respectively.
The series thus supports all major cellular bands for GSM, CDMA and UMTS, as well as the next- generation LTE bands. The LNAs are housed in a common footprint miniature package measuring 2.0 by 2.0 by 0.75 mm. With a shared pin-out and layout of external matching network, the LNAs provide a common PCB layout for customers when used at different frequencies, therefore simplifying design. The performance and features of the series make them ideal to be used as second or third stage LNAs for cellular BTS radio cards, TMAs, combiners, repeaters and remote or digital radio heads.
The ALM-11x36 LNA modules are equipped with a fail-safe bypass function, which is especially critical for TMA applications to enable the LNA bidirectional bypass path during the absence of DC power supply. Their superior bypass isolation eliminates the possibility of oscillation issues, and the modules also feature low bypass insertion loss and high input and output return loss.
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www.compoundsemiconductor.net June 2011
All matching components are fully integrated within the modules and the 50 Ω RF input and output pins are already internally AC-coupled. This makes the modules easy to use, as the only external parts required are DC supply bypass capacitors.
The series delivers optimum performance across a wide range of bands, with the ALM-11036 module covering 776-870 MHz, the ALM-11136 module covering 870-915 MHz, the ALM-11236 module covering 1710-1850 MHz and the ALM-11336 module covering 1850-1980 MHz. All the modules share the same compact 7.0 by 10.0 by 1.5 mm package and pin out configuration and are thus ideal for common platform designs.
The wireless infrastructure industry must provide optimum coverage with the best signal quality in a crowded spectrum. Receiver sensitivity is the most critical requirement in a BTS receiver’s design, and LNA selection greatly affects the receiver’s performance. For front-end design architectures with a bypass path, low noise figure and bypass insertion loss are the key design goals. Another key design factor is linearity, which affects the receiver’s ability to distinguish between wanted and spurious signals that are closely spaced. Input third-order intercept, IIP3, is used to specify linearity.
The MGA-63xP8 LNAs ship in a surface mount 8-lead QFN package, and are priced starting at $2.69 each in 10,000 piece quantities.
The ALM-11x36 LNA modules ship in a 36-lead MCOB package. The ALM-11036 modules are priced at $6.96 each in 10,000 piece quantities.
Samples and production quantities are available now through the Avago direct sales channel and via worldwide distribution partners.
RFMD InGaP HBTs target narrowband MMIC VCO market
The 14 new narrowband indium gallium phosphide VCOs cover the 7.2 - 15.1 GHz frequency range and target the growing point-to-point radio market.
RF Micro Devices, a designer and manufacturer
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