MGA-725M4

MGA-725M4 Low Noise ­Amplifier with Bypass Switch In ­Miniature Leadless Package Data Sheet Description Avago Technologies’s ­ MGA­­-725M4 is an economical, easy-to-use GaAs MMIC Low Noise Amplifier (LNA), which is designed for an adaptive CDMA receiver LNA and adaptive CDMA transmit driver amplifier. The MGA-725M4 features a typical noise figure of 1.4 dB and 14.4 dB associated gain from a single stage, ­feedback FET amplifier. The output is internally matched to 50Ω. The input is optimally internally matched for lowest noise figure into 50Ω. The input may be additionally externally matched for low VSWR through the addition of a single series inductor. When set into the bypass mode, both input and output are internally matched to 50Ω. The MGA-725M4 offers an ­ integrated solution of LNA with adjustable IIP3. The IIP3 can be fixed to a ­desired current level for the receiver’s linearity requirements. The LNA has a bypass switch function, which sets the current to zero and provides low insertion loss. The bypass mode also boosts dynamic range when high level signal is being received. For the CDMA driver amplifier applications, the MGA-725M4 provides suitable gain and linearity to meet the ACPR requirement when the handset transmits the highest power. When transmitting lower power, the MGA-725M4 can be bypassed, saving the drawing current. The MGA-725M4 is a GaAs MMIC, processed on Avago’s cost effective PHEMT (Pseudomorphic High Electron Mobility Transistor). It is housed in ...