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LMX2531-xxxx Evaluation Board

User's Guide

November 2013

SNAU077A

Summary of content (36 pages)

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LMX2531-xxxx Evaluation Board User's Guide November 2013 SNAU077A
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LMX2531-xxxx High Performance Frequency Synthesizer System with Integrated VCO Evaluation Board Operating Instructions 2 SNAU077A LMX2531-xxxx Evaluation Board User’s Guide Copyright © 2013, Texas Instruments Incorporated www.ti.
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TABLE OF CONTENTS EQUIPMENT..................................................................................................................................................................................4 BASIC OPERATION.......................................................................................................................................................................5 LMX2531-XXXX BOARD INFORMATION ..........................................................................................
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Equipment Power Supply The Power Supply should be a low noise power supply. An Agilent 6623A Triple power supply with LC filters on the output to reduce noise was used in creating these evaluation board instructions. Signal Generator The Signal Generator should be capable of frequencies and power level required for the part. A Rohde & Schwarz SML03 was used in creating these evaluation board instructions. Phase Noise / Spectrum Analyzer For measuring phase noise an Agilent E5052A is recommended.
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Basic Operation 1. Connect the signal generator output to the OSCin input of the board. For this example we use a 10 MHz sin signal at +5dBm power level. 2. Connect a low noise 3.3 V power supply to the Vcc connector located at the top left of the board. 3. Please see Appendix D for quick start on interfacing the board. Connect PC to the uWire header. 1 2 Power Supply 3.
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. Click “Select Device”  “PLL-VCO”  LMX2531xxxx depending on which chip is on your board. 7. Check your window with “PLL/VCO” Tab screenshot, 10 MHz input, but with VCO output will be different depending on which LMX2531xxxx you selected 6 SNAU077A LMX2531-xxxx Evaluation Board User’s Guide Copyright © 2013, Texas Instruments Incorporated www.ti.
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LMX2531-xxxx Board Information RF LOOP FILTER 100 uA 42.5 deg Phase Margin Loop Bandwidth 4.1 kHz Fcomp 2.5 MHz TCXO Frequency 10 MHz Output Frequency 1712 – 1772 MHz VCO Gain 7.9-84.7i kHz Supply Voltage 2.7 Volts CPout 40 K 40 K VCO 2.7 nF 100 pF 100 pF 47 K 47 pF Vtune November 2013 LMX2531-xxxx Evaluation Board User’s Guide Copyright © 2013, Texas Instruments Incorporated www.ti.
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Appendix C: Quick Start on EVM Communication Codeloader is the software used to communicate with the EVM (Please download the latest version from TI.com - http://www.ti.com/tool/codeloader). This EVM can be controlled through the uWire interface on board. There are two options in communicating with the uWire interface from the computer. OPTION 1 Open Codeloader.
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The Adapter Board This table describes the pins configuration on the adapter board for each EVM board (See examples below table) Jumper Bank Code Loader Configuration EVM A B C D E F G H LMX2581 A4 B1 C2 E5 F1 G1 H1 BUFEN (pin 1), Trigger (pin 7) LMX2541 A4 C3 E4 F1 G1 H1 CE (pin 1), Trigger (pin 10) LMK0400x A0 C3 E5 F1 G1 H1 GOE (pin 7) LMK01000 A0 C1 E5 F1 G1 H1 GOE (pin 7) LMK030xx A0 C1 E5 F1 G1 H1 SYNC (pin 7) LMK02000 A0 C1 E5 F1 G1 H1 SYNC (pin 7) LMK0480x A0 B2 C3 E5 F0 G0 H1 Status_CLKin1 (pin 3)
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EVALUATION BOARD/KIT/MODULE (EVM) ADDITIONAL TERMS Texas Instruments (TI) provides the enclosed Evaluation Board/Kit/Module (EVM) under the following conditions: The user assumes all responsibility and liability for proper and safe handling of the goods. Further, the user indemnifies TI from all claims arising from the handling or use of the goods.
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FCC Interference Statement for Class B EVM devices 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. This equipment generates, uses and can radiate radio frequency energy and, if not installed and used in accordance with the instructions, may cause harmful interference to radio communications.
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【Important Notice for Users of EVMs for RF Products in Japan】】 This development kit is NOT certified as Confirming to Technical Regulations of Radio Law of Japan If you use this product in Japan, you are required by Radio Law of Japan to follow the instructions below with respect to this product: 1. 2. 3. Use this product in a shielded room or any other test facility as defined in the notification #173 issued by Ministry of Internal Affairs and Communications on March 28, 2006, based on Sub-section 1.
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EVALUATION BOARD/KIT/MODULE (EVM) WARNINGS, RESTRICTIONS AND DISCLAIMERS For Feasibility Evaluation Only, in Laboratory/Development Environments. Unless otherwise indicated, this EVM is not a finished electrical equipment and not intended for consumer use.
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IMPORTANT NOTICE Texas Instruments Incorporated and its subsidiaries (TI) reserve the right to make corrections, enhancements, improvements and other changes to its semiconductor products and services per JESD46, latest issue, and to discontinue any product or service per JESD48, latest issue. Buyers should obtain the latest relevant information before placing orders and should verify that such information is current and complete.