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User's Guide
LMK6EVM User's Guide
The LMK6EVM provides a complete evaluation platform to evaluate the clock performance and flexibility of the
Texas Instruments LMK6x Ultra-Low Jitter BAW Oscillator family. This EVM can be used as a flexible clock
source for compliance testing, performance evaluation, and initial system prototyping. The onboard edge-launch
SMA ports provide access to the configurable clock output of the LMK6x, which allows the device to interface
with test equipment and reference boards using commercially available coaxial cables, adapters, or baluns (not
included).
The LMK6x is a lower-power clock oscillator using TI's BAW technology. The LMK6x is available in two package
sizes, DLE (3.2 mm × 2.5 mm) and DLF (2.5 mm × 2.0 mm), and four different output formats: LVCMOS,
LVPECL, LVDS, and HCSL. Both footprints are included on the EVM with independent termination networks.
The termination scheme can be modified by the user for the desired output format. The LMK6EVM is not
populated with an LMK6x device, so the user can choose the desired variant for evaluation.
SNAU277A – APRIL 2022 – REVISED DECEMBER 2022
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ABSTRACT
Figure 1-1. LMK6EVM Evaluation Board
Copyright © 2022 Texas Instruments Incorporated
LMK6EVM User's Guide
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Summary of Contents for Texas Instruments LMK6EVM
- Page 1 LVPECL, LVDS, and HCSL. Both footprints are included on the EVM with independent termination networks. The termination scheme can be modified by the user for the desired output format. The LMK6EVM is not populated with an LMK6x device, so the user can choose the desired variant for evaluation.
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Page 2: Table Of Contents
5 PCB Layout and Layer Stack-Up............................9 5.1 PCB Layer Stack-Up................................5.2 PCB Layout..................................6 Bill of Materials..................................7 Revision History..................................11 LMK6EVM User's Guide SNAU277A – APRIL 2022 – REVISED DECEMBER 2022 Submit Document Feedback Copyright © 2022 Texas Instruments Incorporated... -
Page 3: Introduction
A LMK6x Device 1.3 Resources See the LMK6x Low Jitter, High-Performance BAW Oscillator data sheet for more information about the LMK6x devices. SNAU277A – APRIL 2022 – REVISED DECEMBER 2022 LMK6EVM User's Guide Submit Document Feedback Copyright © 2022 Texas Instruments Incorporated... -
Page 4: Setup
2.1 Connection Diagram Figure 2-1 shows the LMK6EVM (DCC222A) connection diagram. To test LMK6xDLF variants (DLF 2.5 mm × 2.0 mm package), the device should be soldered on Y1 and P1, and P2 can be connected to an oscilloscope or phase noise analyzer to evaluate the device output. Similarly for LMK6xDLE variants (DLE 3.2 mm × 2.5 mm package), the device should be soldered on Y2 and P3, and P4 will be used accordingly to measure the output. -
Page 5: Evm Strap Options
J6 is used to select the output voltage of the onboard voltage regulator. 2.5 Configuring the Clock Output Termination The LMK6EVM comes pre-populated with an AC-coupled LVCMOS termination. The termination can be modified by the user to support LVPECL, LVDS, and HCSL output formats according to the component values in the table below. - Page 6 50 Ω to Vcc – 2 V termination is required on the receiver 100-Ω differential termination (R3) is provided on the LMK6EVM. Removing the differential termination on the EVM is possible if the differential termination is available on the receiver Table 2-2.
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Page 7: Typical Measurement
Typical Measurement 3 Typical Measurement 3.1 Phase Noise Figure 3-1 shows the typical phase noise for the LMK6EVM populated with the 156.25-MHz variant of the LMK6H/LMK6P. Figure 3-1. LMK6E6EVM Phase Noise SNAU277A – APRIL 2022 – REVISED DECEMBER 2022 LMK6EVM User's Guide Submit Document Feedback Copyright ©... -
Page 8: Schematic
Schematic www.ti.com 4 Schematic Figure 4-1. Schematic LMK6EVM User's Guide SNAU277A – APRIL 2022 – REVISED DECEMBER 2022 Submit Document Feedback Copyright © 2022 Texas Instruments Incorporated... -
Page 9: Pcb Layout And Layer Stack-Up
Figure 5-1. PCB Layer Stack-Up 5.2 PCB Layout Figure 5-2. Top Layer Figure 5-3. GND Layer Figure 5-5. Bottom Layer Figure 5-4. GND Layer SNAU277A – APRIL 2022 – REVISED DECEMBER 2022 LMK6EVM User's Guide Submit Document Feedback Copyright © 2022 Texas Instruments Incorporated... -
Page 10: Bill Of Materials
Vishay-Dale CRCW06031K50FKEA AEC-Q200 Grade 0, 0603 RES, 1.15 k, 1%, 0.1 W, R25, R26 Vishay-Dale CRCW06031K15FKEA AEC-Q200 Grade 0, 0603 LMK6EVM User's Guide SNAU277A – APRIL 2022 – REVISED DECEMBER 2022 Submit Document Feedback Copyright © 2022 Texas Instruments Incorporated... -
Page 11: Revision History
NOTE: Page numbers for previous revisions may differ from page numbers in the current version. Changes from Revision * (April 2022) to Revision A (December 2022) Page • Changed the LMK6E6EVM-1/LMK6F6EVM to LMK6EVM.................3 SNAU277A – APRIL 2022 – REVISED DECEMBER 2022 LMK6EVM User's Guide Submit Document Feedback Copyright © 2022 Texas Instruments Incorporated... - Page 12 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 13 www.ti.com Regulatory Notices: 3.1 United States 3.1.1 Notice applicable to EVMs not FCC-Approved: FCC NOTICE: This kit is designed to allow product developers to evaluate electronic components, circuitry, or software associated with the kit to determine whether to incorporate such items in a finished product and software developers to write software applications for use with the end product.
- Page 14 www.ti.com Concernant les EVMs avec antennes détachables Conformément à la réglementation d'Industrie Canada, le présent émetteur radio peut fonctionner avec une antenne d'un type et d'un gain maximal (ou inférieur) approuvé pour l'émetteur par Industrie Canada. Dans le but de réduire les risques de brouillage radioélectrique à...
- Page 15 www.ti.com EVM Use Restrictions and Warnings: 4.1 EVMS ARE NOT FOR USE IN FUNCTIONAL SAFETY AND/OR SAFETY CRITICAL EVALUATIONS, INCLUDING BUT NOT LIMITED TO EVALUATIONS OF LIFE SUPPORT APPLICATIONS. 4.2 User must read and apply the user guide and other available documentation provided by TI regarding the EVM prior to handling or using the EVM, including without limitation any warning or restriction notices.
- Page 16 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 © 2019, Texas Instruments Incorporated...
- Page 17 TI products. TI’s provision of these resources does not expand or otherwise alter TI’s applicable warranties or warranty disclaimers for TI products. TI objects to and rejects any additional or different terms you may have proposed. IMPORTANT NOTICE Mailing Address: Texas Instruments, Post Office Box 655303, Dallas, Texas 75265 Copyright © 2022, Texas Instruments Incorporated...