LMX25311415EVAL

LMX2531-xxxx Evaluation Board User's Guide November 2013 SNAU077A 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.com November 2013 TABLE OF CONTENTS EQUIPMENT..................................................................................................................................................................................4 BASIC OPERATION.......................................................................................................................................................................5 LMX2531-XXXX BOARD INFORMATION ......................................................................................................................................7 APPENDIX A: SCHEMATICS......................................................................................................................................................... 27 APPENDIX B: BUILD DIAGRAM................................................................................................................................................... 28 APPENDIX C: QUICK START ON EVM COMMUNICATION ........................................................................................................... 30 November 2013 LMX2531-xxxx Evaluation Board User’s Guide Copyright © 2013, Texas Instruments Incorporated www.ti.com SNAU077A 3 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. An Agilent E4445A PSA Spectrum Analyzer with the Phase Noise option is also usable although the architecture of the E5052A is superior for phase noise measurements. At frequencies less than 100 MHz the local oscillator noise of the PSA is too high and measurements will be of the local oscillator, not the device under test. Oscilloscope The oscilloscope and probes should be capable of measuring the output frequencies of interest when evaluating this board. The Agilent Infiniium DSO81204A was used in creating these evaluation board instructions. 4 SNAU077A LMX2531-xxxx Evaluation Board User’s Guide Copyright © 2013, Texas Instruments Incorporated www.ti.com November 2013 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 3.0 V SMA SMA cable cable OSCin Power Power Cable Cable Sig Gen 10 MHz @ +5 dBm Vcc uWire header 3 Please Please see see Appendix D for Appendix C Appendix Dfor for interface interface info info Laptop Laptop or or PC PC 4. Start CodeLoader4.exe. 5. Select USB or LPT Communication Mode on the Port Setup tab as appropriate. November 2013 LMX2531-xxxx Evaluation Board User’s Guide Copyright © 2013, Texas Instruments Incorporated www.ti.com SNAU077A 5 6. 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.com November 2013 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.com SNAU077A 7 LMX2531-xxxx 8 SNAU077A LMX2531-xxxx Evaluation Board User’s Guide Copyright © 2013, Texas Instruments Incorporated www.ti.com November 2013 November 2013 LMX2531-xxxx Evaluation Board User’s Guide Copyright © 2013, Texas Instruments Incorporated www.ti.com SNAU077A 9 10 SNAU077A LMX2531-xxxx Evaluation Board User’s Guide Copyright © 2013, Texas Instruments Incorporated www.ti.com November 2013 November 2013 LMX2531-xxxx Evaluation Board User’s Guide Copyright © 2013, Texas Instruments Incorporated www.ti.com SNAU077A 11 12 SNAU077A LMX2531-xxxx Evaluation Board User’s Guide Copyright © 2013, Texas Instruments Incorporated www.ti.com November 2013 LMX2531-1570 Spurs 1540 MHz 1570 MHz 1600 MHz November 2013 LMX2531-xxxx Evaluation Board User’s Guide Copyright © 2013, Texas Instruments Incorporated www.ti.com SNAU077A 13 LMX2531-1742 Spurs 1712 MHz 1742 MHz 1772 MHz 14 SNAU077A LMX2531-xxxx Evaluation Board User’s Guide Copyright © 2013, Texas Instruments Incorporated www.ti.com November 2013 LMX2531-1778 Spurs 1748 MHz 1778 MHz 1808 MHz November 2013 LMX2531-xxxx Evaluation Board User’s Guide Copyright © 2013, Texas Instruments Incorporated www.ti.com SNAU077A 15 LMX2531-1950 Spurs 1920 MHz 1950 MHz 1980 MHz 16 SNAU077A LMX2531-xxxx Evaluation Board User’s Guide Copyright © 2013, Texas Instruments Incorporated www.ti.com November 2013 LMX2531-2140 Spurs 2110 MHz 2140 MHz 2170 MHz November 2013 LMX2531-xxxx Evaluation Board User’s Guide Copyright © 2013, Texas Instruments Incorporated www.ti.com SNAU077A 17 LMX2531-2265 Spurs 2235 MHz 2265 MHz 2295 MHz 18 SNAU077A LMX2531-xxxx Evaluation Board User’s Guide Copyright © 2013, Texas Instruments Incorporated www.ti.com November 2013 LMX2531-2294 Spurs 2264 MHz 2294 MHz 2324 MHz November 2013 LMX2531-xxxx Evaluation Board User’s Guide Copyright © 2013, Texas Instruments Incorporated www.ti.com SNAU077A 19 LMX2531-1570 Lock Time 20 SNAU077A LMX2531-xxxx Evaluation Board User’s Guide Copyright © 2013, Texas Instruments Incorporated www.ti.com November 2013 LMX2531-1742 Lock Time November 2013 LMX2531-xxxx Evaluation Board User’s Guide Copyright © 2013, Texas Instruments Incorporated www.ti.com SNAU077A 21 LMX2531-1778 Lock Time 22 SNAU077A LMX2531-xxxx Evaluation Board User’s Guide Copyright © 2013, Texas Instruments Incorporated www.ti.com November 2013 LMX2531-1950 Lock Time November 2013 LMX2531-xxxx Evaluation Board User’s Guide Copyright © 2013, Texas Instruments Incorporated www.ti.com SNAU077A 23 LMX2531-2140 Lock Time 24 SNAU077A LMX2531-xxxx Evaluation Board User’s Guide Copyright © 2013, Texas Instruments Incorporated www.ti.com November 2013 LMX2531-2265 Lock Time November 2013 LMX2531-xxxx Evaluation Board User’s Guide Copyright © 2013, Texas Instruments Incorporated www.ti.com SNAU077A 25 LMX2531-2294 Lock Time rsf 26 SNAU077A LMX2531-xxxx Evaluation Board User’s Guide Copyright © 2013, Texas Instruments Incorporated www.ti.com November 2013 Appendix A: Schematics November 2013 LMX2531-xxxx Evaluation Board User’s Guide Copyright © 2013, Texas Instruments Incorporated www.ti.com SNAU077A 27 Appendix B: Build Diagram Top Overlay 28 SNAU077A LMX2531-xxxx EVM Master User’s Guide Copyright © 2013, Texas Instruments Incorporated www.ti.com November 2013 Bottom Overlay November 2013 LMX2531-xxxx Evaluation Board User’s Guide Copyright © 2013, Texas Instruments Incorporated www.ti.com SNAU077A 29 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.exe  Click “Select Device”  Click “Port Setup” tab  Click “LPT” (in Communication Mode) OPTION 2 November 2013 LMX2531-xxxx Evaluation Board User’s Guide Copyright © 2013, Texas Instruments Incorporated www.ti.com SNAU077A 30 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) LMK04816/4906 A0 B2 C3 E5 F0 G0 H1 Status_CLKin1 (pin 3) LMK01801 A0 B4 C5 E2 F0 G0 H1 Test (pin 3), SYNC0 (pin 10) LMK0482x (prelease) A0 B5 C3 D2 E4 F0 G0 H1 CLKin1_SEL (pin 6), Reset (pin 10) LMX2531 A0 E5 F2 G1 H2 Trigger (pin 1) LMX2485/7 A0 C1 E5 F2 G1 H0 ENOSC (pin 7), CE (pin 10) LMK03200 A0 E5 F0 G0 H1 SYNC (pin 7) LMK03806 A0 C1 E5 F0 G0 H1 LMK04100 A0 C1 E5 F1 G1 H1 Example adapter configuration (LMK01801) Open Codeloader.exe  Click “Select Device”  Click “Port Setup” Tab  Click “USB” (in Communication Mode) *Remember to also make modifications in “Pin Configuration” Section according to Table above. November 2013 LMX2531-xxxx Evaluation Board User’s Guide Copyright © 2013, Texas Instruments Incorporated www.ti.com SNAU077A 31 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. All semiconductor products (also referred to herein as “components”) are sold subject to TI’s terms and conditions of sale supplied at the time of order acknowledgment. TI warrants performance of its components to the specifications applicable at the time of sale, in accordance with the warranty in TI’s terms and conditions of sale of semiconductor products. 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