NXP Semiconductors BGA6489 Product Data Sheet

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NXP Semiconductors BGA6489 Product Data Sheet Manual pdf 7 page image

BGA6489_2 © NXP B.V. 2009. All rights reserved.Product data sheet Rev. 02 — 15 June 2009 7 of 13NXP Semiconductors BGA6489MMIC wideband medium power amplifier8. Application informationFigure 10 shows a typical application circuit for the BGA6489 MMIC. The device isinternally matched to 50 Ω and therefore does not require any external matching. Thevalue of the input and output DC blocking capacitors C1 and C2 depends on the operatingfrequency; see Table 9. Capacitors C1 and C2 are used in conjunction with L1 and C3 tofine tune the input and output impedance. Capacitor C4 is a supply decoupling capacitor.A 1 μF capacitor (C5) can be added for optimum supply decoupling. The externalcomponents should be placed as close as possible to the MMIC. When using via holes,use multiple via holes per pin in order to limit ground path induction. Resistor R1 is a biasresistor providing DC current stability with temperature.VS = 8 V; R bias = 39 Ω.Fig 9. Supply current as function of operating junction temperature; typical valuesI s(mA)−40 40−20 0 60 80T j (°C)2060100907080mgx408(1) Optional capacitor for optimum supply decoupling.(2) R1 values at operating supply voltage:VS = 6 V; R1 = 27 Ω.VS = 8 V; R1 = 39 Ω.VS = 11 V; R1 = 82 Ω.Fig 10. Typical application circuit50 Ωmicrostrip C1 C2C3L1V S50 ΩmicrostripC4 C5(1)R1(2)mgx4191 V D23