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General Description
The evaluation board
Clock Tree Driver with I
in mobile handsets. It provides a solution to clocking issues such as limited drive capability for fanout or
longer traces, protection of the master clock from varying loads and frequency pulling effects, isolation
buffering from noisy modules, and crosstalk isolation. It has very low phase noise which enables it to drive
sensitive modules such as Wireless LAN and Bluetooth.
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I
C is a trademark of Philips Semiconductor Corp.
All other trademarks are the property of their respective owners.
SNAA068B – July 2009 – Revised May 2013
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AN-1966 LMH2190 Evaluation Board
(Figure
1) is designed to help the evaluation of the LMH2190 Quad Channel 26 MHz
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C™ interface. The LMH2190 provides a digital system clock to peripheral devices
Figure 1. LMH2190 Evaluation Board
Copyright © 2009–2013, Texas Instruments Incorporated
User's Guide
SNAA068B – July 2009 – Revised May 2013
AN-1966 LMH2190 Evaluation Board
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Summary of Contents for Texas Instruments AN-1966 LMH2190
- Page 1 Figure 1. LMH2190 Evaluation Board C is a trademark of Philips Semiconductor Corp. All other trademarks are the property of their respective owners. SNAA068B – July 2009 – Revised May 2013 AN-1966 LMH2190 Evaluation Board Submit Documentation Feedback Copyright © 2009–2013, Texas Instruments Incorporated...
- Page 2 Figure 2. The settings of these jumpers and their functions are listed in Table AN-1966 LMH2190 Evaluation Board SNAA068B – July 2009 – Revised May 2013 Submit Documentation Feedback Copyright © 2009–2013, Texas Instruments Incorporated...
- Page 3 CLK_REQx Logic High CLK_REQx HIGH Level CLK_REQx HIGH CLK_REQx HIGH ENABLE Bold face jumper settings refer to the factory default configuration. SNAA068B – July 2009 – Revised May 2013 AN-1966 LMH2190 Evaluation Board Submit Documentation Feedback Copyright © 2009–2013, Texas Instruments Incorporated...
- Page 4 SDA and SCL Pull-up resistors connected on SDA and SCL SCLK_REQ Header Header to monitor SCLK_REQ. Future purpose Not Assembled AN-1966 LMH2190 Evaluation Board SNAA068B – July 2009 – Revised May 2013 Submit Documentation Feedback Copyright © 2009–2013, Texas Instruments Incorporated...
- Page 5 CLK2 CLK3 TIME (5 ns/DIV) CLK4 Figure 4. CLK1 Response, C = 22 pF Figure 5. Clock Outputs Skewed SNAA068B – July 2009 – Revised May 2013 AN-1966 LMH2190 Evaluation Board Submit Documentation Feedback Copyright © 2009–2013, Texas Instruments Incorporated...
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Page 6: Bill Of Material
0603 Capacitor 47 pF C26, R9, R10, R13, R15 0603 Capacitor / Resistor Case A Capacitor 2.2 µF CON1 Connector AN-1966 LMH2190 Evaluation Board SNAA068B – July 2009 – Revised May 2013 Submit Documentation Feedback Copyright © 2009–2013, Texas Instruments Incorporated... -
Page 7: Board Layout
(ESR) of the capacitors should be sufficiently low. A standard capacitor is usually adequate. The copper layers of the evaluation board are depicted in Figure Figure 10, and Figure SNAA068B – July 2009 – Revised May 2013 AN-1966 LMH2190 Evaluation Board Submit Documentation Feedback Copyright © 2009–2013, Texas Instruments Incorporated... - Page 8 Board Layout www.ti.com Figure 7. Component Locations Top Side AN-1966 LMH2190 Evaluation Board SNAA068B – July 2009 – Revised May 2013 Submit Documentation Feedback Copyright © 2009–2013, Texas Instruments Incorporated...
- Page 9 Board Layout www.ti.com Figure 8. Component Locations Bottom Side (Bottom View) SNAA068B – July 2009 – Revised May 2013 AN-1966 LMH2190 Evaluation Board Submit Documentation Feedback Copyright © 2009–2013, Texas Instruments Incorporated...
- Page 10 Figure 9. Top Layer of Evaluation Board Figure 10. Inner Layer of Evaluation Board Figure 11. Bottom Layer of Evaluation Board AN-1966 LMH2190 Evaluation Board SNAA068B – July 2009 – Revised May 2013 Submit Documentation Feedback Copyright © 2009–2013, Texas Instruments Incorporated...
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Page 11: Important Notice
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.
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