Avago ALM-1812高增益GPS前端方案

    Avago公司的ALM-1812是高增益低噪音GPS前端放大器,组合了高增益LNA和GPS FBAR滤波器.LNA采用Avago的GaAs增强模式pHEMT工艺,而一流的FBAR滤波器在Cell/PCS频段有极好的抑制特性,大于85dB. ALM-1812的增益为19.1dB,NF为1.66dB,IIP3 = +2 dBm, IP1dB = -8 dBm.

    ALM-1812: High-Gain GPS Low Noise Amplifier with Integrated Filters and Variable Current/Shutdown Function

    Avago Technologies’ ALM-1812 is a GPS front-end module that combines a high-gain low-noise amplifier (LNA) with GPS FBAR filters. The LNA uses Avago Technologies’ pro­prietary GaAs Enhancement-mode pHEMT process to achieve high gain with very low noise figure and high linearity. Noise figure distribution is very tightly controlled. A CMOS-compatible shutdown pin is included either for turning the LNA on/off, or for current adjustment. The integrated filter utilizes an Avago Technologies’ leading-edge FBAR filter for exceptional rejection at Cell/PCS-Band frequencies.

    The low noise figure and high gain, coupled with low current consumption make it suitable for use in critical low-power GPS applications or during low-battery situations.

    ALM-1812主要特性:

    ? Very Low Noise Figure

    ? Exceptional Cell/PCS-Band rejection

    ? Low external component count

    ? Fully-matched at RF input and RF output

    ? Shutdown current: < 1 uA

    ? CMOS compatible shutdown pin (SD)

    ? ESD:> 3kV at RFin pin

    ? 4.5 x 2.2 x 0.95 mm3 size

    ? Adjustable bias current via single external resistor/voltage

    ? Lead-free, Halogen free and meets MSL3

    ALM-1812主要指标:

    Specifications (Typical performance @ 25°C) At 1.575GHz, Vdd = 2.8V, Idd = 6.8mA

    ? Gain = 19.1 dB

    ? NF = 1.66 dB

    ? IIP3 = +2 dBm, IP1dB = -8 dBm

    ? S11 = -10 dB, S22 = -15 dB

    ? Cell-Band Rejection:> 90dBc

    ? PCS-Band Rejection:> 85dBc

    ALM-1812应用:

    ? GPS Front-end Module