Texas Instruments LMX248 Series User Manual
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Texas Instruments LMX248 Series User Manual

Texas Instruments LMX248 Series User Manual

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LMX248x Evaluation Board
User's Guide
Literature Number: SNAU137B
March 2014 – Revised July 2018

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Summary of Contents for Texas Instruments LMX248 Series

  • Page 1 LMX248x Evaluation Board User's Guide Literature Number: SNAU137B March 2014 – Revised July 2018...

  • Page 2: Table Of Contents

    PCB Layouts ................Typical Phase Noise Performance Plots ..................LMX2485E Phase Noise Plots ..................LMX2487E Phase Noise Plots .......................... Revision History Table of Contents SNAU137B – March 2014 – Revised July 2018 Submit Documentation Feedback Copyright © 2014–2018, Texas Instruments Incorporated...
  • Page 3 SNAU137B – March 2014 – Revised July 2018 LMX248x Evaluation Board The Texas Instruments LMX2485E-EVM/LMX2487E-EVM helps designers evaluate the operation and performance of any device in the LMX248x family. Although only two options are offered, the other members in the family are all pinout-compatible and program-compatible to one of these existing board option.

  • Page 4: Trademarks

    These VCOs were chosen primarily for their availability, standard footprint, and for their lower risk of becoming obsolete. LMX248x Evaluation Board SNAU137B – March 2014 – Revised July 2018 Submit Documentation Feedback Copyright © 2014–2018, Texas Instruments Incorporated...

  • Page 5: Setup

    Setup Input/Output Connector Description Input Reference Frequency 10 pin Header from Spectrum USB2ANY Analyzer Figure 1. Evaluation Board Setup SNAU137B – March 2014 – Revised July 2018 LMX248x Evaluation Board Submit Documentation Feedback Copyright © 2014–2018, Texas Instruments Incorporated...

  • Page 6: Loop Filter Values

    Installing the EVM Software 1. Go to http://www.ti.com/tool/ticspro-sw 2. Click on the download button to download the software. 3. Run the executable file. LMX248x Evaluation Board SNAU137B – March 2014 – Revised July 2018 Submit Documentation Feedback Copyright © 2014–2018, Texas Instruments Incorporated...

  • Page 7: Using The Evm Software

    Figure 2. Choosing the LMX2487E Device in TICS Pro NOTE: Don’t forget to press <Cntrl>+L or do Keyboard Controls → Load Device, to load the settings SNAU137B – March 2014 – Revised July 2018 LMX248x Evaluation Board Submit Documentation Feedback Copyright © 2014–2018, Texas Instruments Incorporated...

  • Page 8: Schematic

    TP_Ftest/LD VccPLL TP_CLK 100pF 52601-S10-8LF 142-0701-851 VddRF5 100pF 100pF Copyright © 2018, Texas Instruments Incorporated Figure 3. LMX2485E/87E EVM Schematic LMX248x Evaluation Board SNAU137B – March 2014 – Revised July 2018 Submit Documentation Feedback Copyright © 2014–2018, Texas Instruments Incorporated...

  • Page 9: Bill Of Materials

    S1, TP_Ftest/LD, TP_OSCout, TP_TRIGGER, Open Open None TP_VtuneIF, TP_VtuneRF Fiducial mark. There is FID1, FID2, FID3 nothing to buy or mount. SNAU137B – March 2014 – Revised July 2018 LMX248x Evaluation Board Submit Documentation Feedback Copyright © 2014–2018, Texas Instruments Incorporated...
  • Page 10 5%, 0.1W, 0603 RES, 1.2k ohm, CRCW06031K20JN R3_RF Vishay-Dale 5%, 0.1W, 0603 RES, 1.2k ohm, CRCW06031K20JN R4_RF Vishay-Dale 5%, 0.1W, 0603 LMX248x Evaluation Board SNAU137B – March 2014 – Revised July 2018 Submit Documentation Feedback Copyright © 2014–2018, Texas Instruments Incorporated...

  • Page 11: Layers Stackup

    Bottom Layer copper clad for thermal relief (1 oz.) • Total board thickness is 62 mils PCB Layouts Figure 4. Layer #1 – Top SNAU137B – March 2014 – Revised July 2018 LMX248x Evaluation Board Submit Documentation Feedback Copyright © 2014–2018, Texas Instruments Incorporated...
  • Page 12 PCB Layouts www.ti.com Figure 5. Layer #2 – RF Ground Plane LMX248x Evaluation Board SNAU137B – March 2014 – Revised July 2018 Submit Documentation Feedback Copyright © 2014–2018, Texas Instruments Incorporated...
  • Page 13 PCB Layouts www.ti.com Figure 6. Layer #3 – Power SNAU137B – March 2014 – Revised July 2018 LMX248x Evaluation Board Submit Documentation Feedback Copyright © 2014–2018, Texas Instruments Incorporated...
  • Page 14 PCB Layouts www.ti.com Figure 7. Layer #3 – Bottom Layer LMX248x Evaluation Board SNAU137B – March 2014 – Revised July 2018 Submit Documentation Feedback Copyright © 2014–2018, Texas Instruments Incorporated...

  • Page 15: Typical Phase Noise Performance Plots

    Typical Phase Noise Performance Plots www.ti.com Typical Phase Noise Performance Plots LMX2485E Phase Noise Plots Figure 8. Impact of CPG on Phase Noise SNAU137B – March 2014 – Revised July 2018 LMX248x Evaluation Board Submit Documentation Feedback Copyright © 2014–2018, Texas Instruments Incorporated...
  • Page 16 Typical Phase Noise Performance Plots www.ti.com Figure 9. LMX2485E Impact of Fractional Modulator Order LMX248x Evaluation Board SNAU137B – March 2014 – Revised July 2018 Submit Documentation Feedback Copyright © 2014–2018, Texas Instruments Incorporated...
  • Page 17 Typical Phase Noise Performance Plots www.ti.com Figure 10. LMK2485E Impact of Dithering SNAU137B – March 2014 – Revised July 2018 LMX248x Evaluation Board Submit Documentation Feedback Copyright © 2014–2018, Texas Instruments Incorporated...

  • Page 18: Lmx2487E Phase Noise Plots

    Typical Phase Noise Performance Plots www.ti.com LMX2487E Phase Noise Plots Figure 11. LMX2487E Impact of CPG on Phase Noise LMX248x Evaluation Board SNAU137B – March 2014 – Revised July 2018 Submit Documentation Feedback Copyright © 2014–2018, Texas Instruments Incorporated...
  • Page 19 Typical Phase Noise Performance Plots www.ti.com Figure 12. LMX2487E Impact on Fractional Modulator SNAU137B – March 2014 – Revised July 2018 LMX248x Evaluation Board Submit Documentation Feedback Copyright © 2014–2018, Texas Instruments Incorporated...
  • Page 20 Typical Phase Noise Performance Plots www.ti.com Figure 13. LMX2487E Impact of Dithering LMX248x Evaluation Board SNAU137B – March 2014 – Revised July 2018 Submit Documentation Feedback Copyright © 2014–2018, Texas Instruments Incorporated...

  • Page 21: Revision History

    Deleted Quick Start for EVM Communications section ..................• Changed Clock Design Tool to PLLatinum Sim ................... • Changed CodeLoader software to TICSPro SNAU137B – March 2014 – Revised July 2018 Revision History Submit Documentation Feedback Copyright © 2014–2018, Texas Instruments Incorporated...
  • Page 22 STANDARD TERMS FOR EVALUATION MODULES Delivery: TI delivers TI evaluation boards, kits, or modules, including any accompanying demonstration software, components, and/or documentation which may be provided together or separately (collectively, an “EVM” or “EVMs”) to the User (“User”) in accordance with the terms set forth herein.
  • Page 23 FCC Interference Statement for Class B EVM devices NOTE: This equipment has been tested and found to comply with the limits for a Class B digital device, pursuant to part 15 of the FCC Rules. These limits are designed to provide reasonable protection against harmful interference in a residential installation.
  • Page 24 【無線電波を送信する製品の開発キットをお使いになる際の注意事項】 開発キットの中には技術基準適合証明を受けて いないものがあります。 技術適合証明を受けていないもののご使用に際しては、電波法遵守のため、以下のいずれかの 措置を取っていただく必要がありますのでご注意ください。 1. 電波法施行規則第6条第1項第1号に基づく平成18年3月28日総務省告示第173号で定められた電波暗室等の試験設備でご使用 いただく。 2. 実験局の免許を取得後ご使用いただく。 3. 技術基準適合証明を取得後ご使用いただく。 なお、本製品は、上記の「ご使用にあたっての注意」を譲渡先、移転先に通知しない限り、譲渡、移転できないものとします。 上記を遵守頂けない場合は、電波法の罰則が適用される可能性があることをご留意ください。 日本テキサス・イ ンスツルメンツ株式会社 東京都新宿区西新宿６丁目２４番１号 西新宿三井ビル 3.3.3 Notice for EVMs for Power Line Communication: Please see http://www.tij.co.jp/lsds/ti_ja/general/eStore/notice_02.page 電力線搬送波通信についての開発キットをお使いになる際の注意事項については、次のところをご覧ください。http:/ /www.tij.co.jp/lsds/ti_ja/general/eStore/notice_02.page 3.4 European Union 3.4.1 For EVMs subject to EU Directive 2014/30/EU (Electromagnetic Compatibility Directive): This is a class A product intended for use in environments other than domestic environments that are connected to a low-voltage power-supply network that supplies buildings used for domestic purposes.
  • Page 25 Notwithstanding the foregoing, any judgment may be enforced in any United States or foreign court, and TI may seek injunctive relief in any United States or foreign court. Mailing Address: Texas Instruments, Post Office Box 655303, Dallas, Texas 75265 Copyright © 2018, Texas Instruments Incorporated...
  • Page 26 IMPORTANT NOTICE FOR TI DESIGN INFORMATION AND RESOURCES Texas Instruments Incorporated (‘TI”) technical, application or other design advice, services or information, including, but not limited to, reference designs and materials relating to evaluation modules, (collectively, “TI Resources”) are intended to assist designers who are developing applications that incorporate TI products;...

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