Freescale Semiconductor Quick Start Guide Document Number: MBC139171900QSG Rev. 0, 11/2010 MBC13917 Evaluation Board Quick Start — 1900 MHz INTRODUCTION This evaluation board design demonstrates one possible design at 2.7 V that satisfies competing requirements for NF, IP3, gain, return losses and reverse isolation with unconditional stability. By changing any of the requirements, the performance for a particular parameter can be greatly improved to meet a particular spec requirement. This circuit was designed to provide NF < 2.2 dB, S21 gain > 12 dB and S11 better than --10 dB S22 better than --10 dB at 1900 MHz. Gain, NF and OIP3 can be improved by sacrificing stability and return losses. Emitter inductance can be added to the board as an option for improved linearity. NOTE: Tables 1 and 2 list measured parameters on three typical evaluation boards and are meant as a guide to the RF performance possible for this application circuit. Variations in matching component performance may result in variation in evaluation board performance results. Table 1. Evaluation Board Measurements (1900 MHz, VCC = 2.7 V, Frequency Spacing = 200 kHz) Serial # Input Power (dBm) Output Power (dBm) Power Gain (dB) Output IP3 (dBm) Input IP3 (dBm) Output Ref P1dB (dBm) Input Ref P1dB (dBm) NF (dB) ICC (mA) 1 --30.00 --15.49 14.51 7.41 --7.1 --1.6 --16.1 1.67 4.93 2 --30.00 --15.21 14.79 7.99 --6.8 --1.2 --16.0 1.59 5.01 3 --30.00 --15.39 14.61 7.81 --6.8 --1.09 --15.7 1.62 4.99 Table 2. S--Parameters (1900 MHz, VCC = 2.7 V) Serial # S11 (dB) S21 (dB) S12 (dB) S22 (dB) 1 --10.02 14.46 --45.2 --9.97 2 --10.97 14.95 --46.1 --9.51 3 --10.81 14.54 --46.2 --9.17 © Freescale Semiconductor, Inc., 2010. All rights reserved. MBC139171900QSG RF Engineering Bulletin Freescale Semiconductor 1 GND GND VCC RF IN C1 L1 6 1 GND NC 2 5 3 4 GND VCC C3 L2 C4 Pin 1 C1 RF OUT L3 L1 Q1 RFIN C2 C3 C4 L2 C2 L3 RFOUT NC Figure 1. MBC13917 1900 MHz Schematic MBC13917 Cannes V1R1 Figure 2. MBC13917 1900 MHz Evaluation Circuit Component Layout Table 3. Evaluation Circuit Component Designations and Values Component Value Case Manufacturer C1 3.3 pF 402 Murata DC Block, Input match Comments C2 0.01 μF 402 Murata Low freq bypass to improve IP3 C3 33 pF 402 Murata RF bypass C4 2.7 pF 402 Murata DC Block, Output match L1 3.3 nH 402 Murata Input match L2 10 nH 402 Murata DC Feedthrough, Output match L3 5.6 nH 402 Murata Output match Q1 MBC13917 MLP6 Freescale SiGe cascode amp MBC139171900QSG 2 Quick Start Guide Freescale Semiconductor How to Reach Us: Home Page: www.freescale.com Web Support: http://www.freescale.com/support USA/Europe or Locations Not Listed: Freescale Semiconductor, Inc. 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