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The LMX2492EVM is design to evaluate the performance of LMX2492. This board consists of a LMX2492
device, a LP5900-3.3V LDO, a 9.4 - 10.8 GHz VCO and a 100 MHz crystal oscillator.
The LMX2492 is a low noise 14 GHz wideband delta-sigma fractional N PLL with ramp and chirp
generation. It consists of a phase frequency detector, programmable charge pump, and high frequency
input for the external VCO. The LMX2492 supports a broad and flexible class of ramping capabilities,
including FSK and configurable piecewise linear FM modulation profiles of up to 8 segments.
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LMX2492EVM Evaluation Module
User's Guide
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Summary of Contents for Texas Instruments LMX2492EVM
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Page 1: Table Of Contents
SNAU160E – March 2014 – Revised October 2017 LMX2492EVM Evaluation Module The LMX2492EVM is design to evaluate the performance of LMX2492. This board consists of a LMX2492 device, a LP5900-3.3V LDO, a 9.4 - 10.8 GHz VCO and a 100 MHz crystal oscillator. - Page 2 List of Tables ....................Loop Filter Configuration ......................Bill of Materials Trademarks All trademarks are the property of their respective owners. LMX2492EVM Evaluation Module SNAU160E – March 2014 – Revised October 2017 Submit Documentation Feedback Copyright © 2014–2017, Texas Instruments Incorporated...
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Page 3: Snau160E – March 2014 – Revised October
An oscilloscope (optional) • A high quality signal generator (optional) • A function waveform generator (optional) • Texas Instruments Clocks and Synthesizers TICS Pro software • Texas Instruments PLLatinum Simulator Tool (optional) Resources Related evaluation and development resources are as follows: •... -
Page 4: Setup
Download and install TICS Pro to a PC. Run the software and follow the following steps to get started. 1. Go to "Select Device" → "PLL" → LMX2492 LMX2492EVM Evaluation Module SNAU160E – March 2014 – Revised October 2017 Submit Documentation Feedback Copyright © 2014–2017, Texas Instruments Incorporated... -
Page 5: Select Device In Tics Pro
TRIG1, TRIG2 and MOD are connected to the uWire header. They could be used as the input trigger sources or output flag indicators during frequency ramping. Figure 4. IO Port SNAU160E – March 2014 – Revised October 2017 LMX2492EVM Evaluation Module Submit Documentation Feedback Copyright © 2014–2017, Texas Instruments Incorporated... -
Page 6: Typical Measurement
2. Go to "USB communications" → "Write All Registers" to write all the registers to LMX2492. Default output is 4.8 GHz at RFout/2 SMA connector. LMX2492EVM Evaluation Module SNAU160E – March 2014 – Revised October 2017 Submit Documentation Feedback Copyright © 2014–2017, Texas Instruments Incorporated... -
Page 7: Default Output
MOD pin to toggle the RF output to switch between 9600 MHz and 9604 MHz. That is, FSK deviation is 4 MHz. Figure 7. TICS Pro FSK Configuration SNAU160E – March 2014 – Revised October 2017 LMX2492EVM Evaluation Module Submit Documentation Feedback Copyright © 2014–2017, Texas Instruments Incorporated... -
Page 8: Fsk Example
This example shows how to generate a continuous sawtooth ramp. Only one ramp segment is necessary as it will loop back to itself. Figure 9. Continuous Sawtooth Ramp Configuration LMX2492EVM Evaluation Module SNAU160E – March 2014 – Revised October 2017 Submit Documentation Feedback Copyright © 2014–2017, Texas Instruments Incorporated... -
Page 9: Continuous Sawtooth Ramp Example
2 phase detector cycles. Output flags are turned on to indicate the start of a ramp. Figure 11. Continuous Trapezoid Ramp Configuration SNAU160E – March 2014 – Revised October 2017 LMX2492EVM Evaluation Module Submit Documentation Feedback Copyright © 2014–2017, Texas Instruments Incorporated... -
Page 10: Flag Out Pins Configuration
Typical Measurement www.ti.com Figure 12. Flag Out Pins Configuration Figure 13. Flags Out Timing Figure 14. Continuous Trapezoid Ramp Example LMX2492EVM Evaluation Module SNAU160E – March 2014 – Revised October 2017 Submit Documentation Feedback Copyright © 2014–2017, Texas Instruments Incorporated... -
Page 11: Readback Setting
4. Click on the Register Name that you want to read back. 5. Click the Read Register button to read back the register value. Figure 16. Register Readback SNAU160E – March 2014 – Revised October 2017 LMX2492EVM Evaluation Module Submit Documentation Feedback Copyright © 2014–2017, Texas Instruments Incorporated... -
Page 12: Snau160E - March 2014 - Revised October 2017
Schematic www.ti.com Schematic Figure 17. LMX2492EVM Schematic (Page 1) LMX2492EVM Evaluation Module SNAU160E – March 2014 – Revised October 2017 Submit Documentation Feedback Copyright © 2014–2017, Texas Instruments Incorporated... -
Page 13: Snau160E - March 2014 - Revised October 2017
Schematic www.ti.com Figure 18. LMX2492EVM Schematic (Page 2) SNAU160E – March 2014 – Revised October 2017 LMX2492EVM Evaluation Module Submit Documentation Feedback Copyright © 2014–2017, Texas Instruments Incorporated... -
Page 14: Pcb Layout And Layer Stack-Up
FR4 (Er = 4.6) Power layer FR4 (Er = 4.6) Bottom layer Figure 19. PCB Layer Stack-up PCB Layout Figure 20. Top Layer LMX2492EVM Evaluation Module SNAU160E – March 2014 – Revised October 2017 Submit Documentation Feedback Copyright © 2014–2017, Texas Instruments Incorporated... -
Page 15: Gnd Layer
PCB Layout and Layer Stack-up www.ti.com Figure 21. GND Layer Figure 22. Power Layer SNAU160E – March 2014 – Revised October 2017 LMX2492EVM Evaluation Module Submit Documentation Feedback Copyright © 2014–2017, Texas Instruments Incorporated... -
Page 16: Bottom Layer
PCB Layout and Layer Stack-up www.ti.com Figure 23. Bottom Layer LMX2492EVM Evaluation Module SNAU160E – March 2014 – Revised October 2017 Submit Documentation Feedback Copyright © 2014–2017, Texas Instruments Incorporated... -
Page 17: Bill Of Materials
Requires No Bypass Capacitor uWire Header (shrouded), 100mil, 5x2, Gold 52601-S10-8LF plated, SMD OSC 100.0000 MHz 3.3 V ±25 PPM CWX813-100.0M Connor-Winfield SNAU160E – March 2014 – Revised October 2017 LMX2492EVM Evaluation Module Submit Documentation Feedback Copyright © 2014–2017, Texas Instruments Incorporated... -
Page 18: Troubleshooting Guide
• Register readback requires the correct hardware and software setup. See Section 3.2.4 for details. • The POR current of the LMX2492EVM is approximately 175 mA. • The powerdown current of the LMX2492EVM is approximately 175 mA. Start Congratulation! Device locked Verify hardware setup: Validate power supply is connected, turned on, and current limit is appropriate for the device. -
Page 19: Firmware Requirement
Simply follow the pop-up instructions to complete the update. This is necessary to ensure that the USB connection between the PC and the USB2ANY module is properly setup, otherwise the programming to LMX2492EVM will not be successful. 1. When you see this message, click the "OK" button. -
Page 20: Bsl Button
4. Click the "OK" button to go back to the previous screen. Follow the on-screen procedure until the below screen is pop-up. Figure 28. Update Firmware USB2ANY Firmware Upgrade SNAU160E – March 2014 – Revised October 2017 Submit Documentation Feedback Copyright © 2014–2017, Texas Instruments Incorporated... -
Page 21: Firmware Update Completed
6. Check the USB connection in TICS Pro by clicking USB communications → Interface. Make sure the USB Connected button is turned green. Figure 30. USB Communications SNAU160E – March 2014 – Revised October 2017 USB2ANY Firmware Upgrade Submit Documentation Feedback Copyright © 2014–2017, Texas Instruments Incorporated... -
Page 22: Reference Clock Input Configuration
SNAU160E – March 2014 – Revised October 2017 Using Different Reference Clock There are different options to provide a reference clock to LMX2492EVM. By default, the EVM is configured for the on-board single-ended XO clock. To use external clock, R21 and R28 must be removed. -
Page 23: Revision History
Changed VCO frequency and VCO gain ....................... • Changed U2 part number ........................• Added Appendix A ........................• Added Appendix B SNAU160E – March 2014 – Revised October 2017 Revision History Submit Documentation Feedback Copyright © 2014–2017, Texas Instruments Incorporated... - Page 24 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 25 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 26 【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 27 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 © 2017, Texas Instruments Incorporated...
- Page 28 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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