Avago technologies, the world’s leading supplier of analog interface components for communications, industrial and consumer applications, has launched an ultra low noise amplifier (LNA) mga-634p8 for base station (BTS) RF front-end design. The new mga-634p8 operates from 1500 MHz to 2300 MHz, expanding its LNA family to cover new GSM, TDS-CDMA and CDMA cellular infrastructure applications.

Key functions:

Working frequency band: 1500mhz ~ 2300mhz

Ultra low noise figure: 0 [email protected]

High linearity: [email protected]

Gain: 17 [email protected]

1dB gain compression point output power: [email protected]

5V single power supply, typical 48mA low power consumption: 240mw

The device adopts mga-63xp8 series universal package size and peripheral matching circuit, which simplifies the design and production of printed circuit board

Special process: 0.25 μ m GaAs enhanced mode PHEMT

Provides options for tape packaging

The operating temperature range is – 25 ℃ to + 85 ℃.

Pb free environmental lead-free design and ROHS standard requirements

The wireless communication infrastructure industry must provide the best coverage in order to provide the best signal quality in the congested spectrum. Receiver sensitivity is the most critical requirement in the design of BTS receiver. The choice of LNA, especially the LNA used in the first stage, has a great influence on the performance of BTS receiver. Low noise figure is a key design goal. Mga-634p8 has the best noise figure (NF) among similar products, which is 0.44 dB at 1900 MHz and the highest is 0.69 dB.

Another key design factor is linearity, which affects the receiver’s ability to distinguish between closely spaced useful signals and spurious signals. The output third-order truncation point OIP3 is used to indicate linearity. Avago’s unique GaAs enhanced mode PHEMT technology can provide 0.48 DB noise figure and 36 MW OIP3 at 1900 MHz with a bias current of 5 V and 48 ma. Compared with previous amplifiers, Avago’s low NF and high OIP3 mga-634p8 can provide more room for designers to design the path of BTS receiver, and achieve performance improvement with very low static power consumption (about 240 MW).

Design optimization and flexibility based on adjustability and general outgoing line

By using the built-in active bias circuit, the working current of mga-634p8 is adjustable. This allows designers to make trade-offs between operating current and output linearity while maintaining the best noise figure. BTS designers can use the same avagalna to meet various design requirements and regional requirements.

Now, as more and more channels have to be installed on the transmit / receive card, PCB substrate has become a key design challenge for BTS engineers. Mga-634p8 is packaged in a square flat leadless (QFN) plastic package with a size of only 4mm2 and a thickness of 0.75mm.

In addition, the new generation mga-634p8lna has the same package size, pins and external matching network as the existing 900 MHz mga-633p8lna. Therefore, common PCB design can be used for BTS RF front-end design with different frequency bands, so that a basic PCB design can meet the needs of different regional markets.

Function, function and application analysis of ultra low noise amplifier mga-634p8

Editor in charge: GT

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