Texas Instruments LMX2571EPEVM, Руководство пользователя

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2.5 Programming...................................................................................................................................................................... 4
2.6 Evaluation Software........................................................................................................................................................... 4
2.7 EVM Strap Options............................................................................................................................................................ 5
3 Typical Measurement .............................................................................................................................................................. 6
3.1 Default Configuration......................................................................................................................................................... 6
3.2 Additional Tests.................................................................................................................................................................. 7
4 Schematic ................................................................................................................................................................................ 9
5 Board Construction .............................................................................................................................................................. 10
5.1 PCB Layer Stack-Up........................................................................................................................................................ 10
5.2 PCB Layout...................................................................................................................................................................... 10
6 Bill of Materials ..................................................................................................................................................................... 13
7 Troubleshooting Guide ......................................................................................................................................................... 14
A Using Different Reference Clock ........................................................................................................................................ 15
B Reference PRO ..................................................................................................................................................................... 16
B.1 Output Frequency Selection............................................................................................................................................ 16
B.2 Output Format Selection.................................................................................................................................................. 16
B.3 Typical Output Characteristics......................................................................................................................................... 17
B.4 Firmware Update............................................................................................................................................................. 17
List of Figures
Figure 2-1. Connection Diagram.................................................................................................................................................. 4
Figure 2-2. Select Device in TICS Pro......................................................................................................................................... 5
Figure 2-3. EVM Default Mode.................................................................................................................................................... 5
Figure 2-4. J11 Header................................................................................................................................................................ 5
Figure 2-5. J12 Header................................................................................................................................................................ 5
Figure 3-1. Loop Filter................................................................................................................................................................. 6
Figure 3-2. Default Output........................................................................................................................................................... 6
Figure 3-3. FSK PIN Mode Setting.............................................................................................................................................. 7
Figure 3-4. FSK PIN Mode.......................................................................................................................................................... 7
Figure 3-5. Readback Setting...................................................................................................................................................... 8
Figure 3-6. Register Readback.................................................................................................................................................... 8
Figure 4-1. LMX2571EPEVM Schematic..................................................................................................................................... 9
Figure 5-1. PCB Layer Stack-Up............................................................................................................................................... 10
Figure 5-2. Top Layer................................................................................................................................................................. 10
Figure 5-3. GND Layer............................................................................................................................................................... 11
Figure 5-4. Signal GND Layer.................................................................................................................................................... 11
Figure 5-5. Bottom Layer........................................................................................................................................................... 12
Figure 7-1. Troubleshooting Guide............................................................................................................................................ 14
Figure A-1. Single-ended Input.................................................................................................................................................. 15
Figure A-2. Differential Input...................................................................................................................................................... 15
Figure A-3. Crystal Oscillator Input............................................................................................................................................ 15
Figure B-1. Output Termination Schematic................................................................................................................................ 17
Figure B-2. Default Output Phase Nosie................................................................................................................................... 17
Figure B-3. Default Output Waveform........................................................................................................................................ 17
Figure B-4. Firmware Requirement........................................................................................................................................... 18
Figure B-5. Firmware Loader..................................................................................................................................................... 18
Figure B-6. BSL Button.............................................................................................................................................................. 18
Figure B-7. Update Firmware.................................................................................................................................................... 18
Figure B-8. Firmware Update Completed.................................................................................................................................. 19
Figure B-9. USB Communications............................................................................................................................................. 19
List of Tables
Table 3-1. Loop Filter Configuration............................................................................................................................................. 6
Table 3-2. FSK PIN Mode Example............................................................................................................................................. 7
Table 6-1. LMX2571EPEVM Bill of Materials............................................................................................................................. 13
Table B-1. Reference PRO Output Frequency Selection........................................................................................................... 16
Table B-2. Reference PRO Output Format Selection................................................................................................................ 16
Table B-3. Output Termination Configuration............................................................................................................................. 16
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2 LMX2571EPEVM Evaluation Instructions SNAU182 – MARCH 2021
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