Texas Instruments LMK6EVM Manual de usuario

User’s Guide

LMK6EVM User's Guide

ABSTRACT

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.

Figure 1-1. LMK6EVM Evaluation Board

www.ti.com

SNAU277A – APRIL 2022 – REVISED DECEMBER 2022

Submit Document Feedback

LMK6EVM User's Guide 1

Table of Contents

1 Introduction.............................................................................................................................................................................3

1.1 Evaluation Module Contents.............................................................................................................................................. 3

1.2 Evaluation Setup Requirement.......................................................................................................................................... 3

1.3 Resources.......................................................................................................................................................................... 3

2 Setup........................................................................................................................................................................................4

2.1 Connection Diagram.......................................................................................................................................................... 4

2.2 Power Supply..................................................................................................................................................................... 4

2.3 Clock Output...................................................................................................................................................................... 4

2.4 EVM Strap Options............................................................................................................................................................ 5

2.5 Configuring the Clock Output Termination......................................................................................................................... 5

3 Typical Measurement..............................................................................................................................................................7

3.1 Phase Noise.......................................................................................................................................................................7

4 Schematic................................................................................................................................................................................8

5 PCB Layout and Layer Stack-Up...........................................................................................................................................9

5.1 PCB Layer Stack-Up.......................................................................................................................................................... 9

5.2 PCB Layout........................................................................................................................................................................ 9

6 Bill of Materials..................................................................................................................................................................... 10

7 Revision History....................................................................................................................................................................11

Table of Contents www.ti.com

2LMK6EVM User's Guide SNAU277A – APRIL 2022 – REVISED DECEMBER 2022

Submit Document Feedback

Trademarks

All trademarks are the property of their respective owners.

1 Introduction

1.1 Evaluation Module Contents

The box contains:

• One LMK6EVM board (DCC222A)

1.2 Evaluation Setup Requirement

The evaluation requires the following hardware:

• A DC power supply

• An oscilloscope

• A signal analyzer (optional)

• A LMK6x Device

1.3 Resources

See the LMK6x Low Jitter, High-Performance BAW Oscillator data sheet for more information about the LMK6x

devices.

www.ti.com Trademarks

SNAU277A – APRIL 2022 – REVISED DECEMBER 2022

Submit Document Feedback

LMK6EVM User's Guide 3

2 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.

Note that for LMK6C variants with an LVCMOS output format, only the positive clock output connection will be

used. The 4-pin LMK6C variants can share the same footprint as the 6-pin LMK6D/P/H variants. The corner pins

are shared, but the middle pins are left unused for the LMK6C devices.

Figure 2-1. Connection Diagram

2.2 Power Supply

Apply 4 V to the VDDin SMA connector (P5). The onboard voltage regulator will provide 1.8 V, 2.5 V, or 3.3 V to

the LMK6X devices based on the jumper selection on J6.

2.3 Clock Output

To test the clock output of Y1, connect P1 (+) and P2 (–) SMA connectors to an oscilloscope or phase

noise analyzer. To test the clock output of Y2, use P3 (–) and P4 (+). The output frequency, amplitude, and

common-mode voltage will depend on the LMK6x variant that is attached to the board, as well as the termination

scheme.

Setup www.ti.com

4LMK6EVM User's Guide SNAU277A – APRIL 2022 – REVISED DECEMBER 2022

Submit Document Feedback

2.4 EVM Strap Options

2.4.1 J1 Header

Put the short across J1 to provide the supply voltage to Y1.

2.4.2 J2 Header

J2 is used to pull pin 1 and pin 2 of Y1 to VDD/GND to select the output enable (OE) pin of the LMK6x device.

LMK6PA/LMK6DA/LMK6HA variants use pin 1 for OE, and LMK6PB/ LMK6DB/LMK6HB variants use pin 2. All

4-pin LMK6C variants use pin 1 for OE.

2.4.3 J3 Header

Put the short across J3 to provide the supply voltage to Y2.

2.4.4 J4 Header

J4 is used to pull pin 1 and pin 2 of Y2 to VDD/Gnd to select the output enable (OE) pin of the LMK6x device.

The LMK6PA/LMK6DA/LMK6HA variants use pin 1 for OE, and the LMK6PB/ LMK6DB/LMK6HB variants use

pin 2. All 4-pin LMK6C variants use pin 1 for OE.

2.4.5 J5 Header

To use the onboard voltage regulator for the LMK6x device, put the short across pin 1 and pin 2 of the J5 header.

Otherwise, put the short across pin 2 and pin 3 of the J5 header to use the external power supply directly.

2.4.6 J6 Header

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.

Table 2-1. Output Termination Schemes for Y1

OUTPUT FORMAT COUPLING COMPONENT VALUE

LVPECL

R1, R5 0 Ω

R2, R4 150 Ω

C1, C4 0.01 uF

R3 DNP

DC(1)

R1, R5, C1, C4 0 Ω

R2, R3,

DNP

LVDS (2)

R1, R5 0 Ω

R3 100 Ω

C1, C4 0.01 uF

R2, R4 DNP

R1, R5, C1, C4 0 Ω

R3 100 Ω

R2, R4 DNP

www.ti.com Setup

SNAU277A – APRIL 2022 – REVISED DECEMBER 2022

Submit Document Feedback

LMK6EVM User's Guide 5

Table 2-1. Output Termination Schemes for Y1 (continued)

OUTPUT FORMAT COUPLING COMPONENT VALUE

HCSL

R1, R5 0 Ω

R2, R4 50 Ω

C1, C4 0.01 uF

R3 DNP

R1, R5, C1, C4 0 Ω

R2, R4 50 Ω

R3 DNP

(1) 50 Ω to Vcc – 2 V termination is required on the receiver

(2) 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. Output Termination Schemes for Y2

OUTPUT FORMAT COUPLING COMPONENT VALUE

LVPECL

R10, R16 0 Ω

R11, R15 150 Ω

C5, C8 0.01 uF

R12 DNP

DC(1)

R10, R16, C5, C8 0 Ω

R11, R12,

R15

DNP

LVDS(2)

R10, R16 0 Ω

R12 100 Ω

C5, C8 0.01 uF

R11, R15 DNP

R10, R16, C5, C8 0 Ω

R12 100 Ω

R11, R15 DNP

HCSL

R10, R16 0 Ω

R11, R15 50 Ω

C5, C10 0.01 uF

R12 DNP

R10, R16, C5, C8 0 Ω

R11, R15 50 Ω

R12 DNP

(1) 50 Ω to Vcc - 2 V termination is required on the receiver

(2) 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

Setup www.ti.com

6LMK6EVM User's Guide SNAU277A – APRIL 2022 – REVISED DECEMBER 2022

Submit Document Feedback

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

www.ti.com Typical Measurement

SNAU277A – APRIL 2022 – REVISED DECEMBER 2022

Submit Document Feedback

LMK6EVM User's Guide 7

4 Schematic

Figure 4-1. Schematic

Schematic www.ti.com

8LMK6EVM User's Guide SNAU277A – APRIL 2022 – REVISED DECEMBER 2022

Submit Document Feedback

5 PCB Layout and Layer Stack-Up

5.1 PCB 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 5-4. GND Layer Figure 5-5. Bottom Layer

www.ti.com PCB Layout and Layer Stack-Up

SNAU277A – APRIL 2022 – REVISED DECEMBER 2022

Submit Document Feedback

LMK6EVM User's Guide 9

6 Bill of Materials

Designator Description Manufacturer PartNumber Quantity

C1, C4, C8, C12, C14 CAP, CERM, 0.1 uF, 16 V,

+/- 5%, X7R, 0603 Kemet C0603C104J4RACTU 5

C2, C7 CAP, CERM, 0.01 uF, 100

V, +/- 5%, X7R, 0603 AVX 06031C103JAT2A 2

C3, C6, C11

CAP, CERM, 1 µF, 16 V,+/-

10%, X7R, AEC-Q200

Grade 1, 0603

TDK CGA3E1X7R1C105K080A

C9, C10 CAP, CERM, 10 uF, 16 V,

+/- 20%, X7R, 0805 Taiyo Yuden EMK212BB7106MG-T 2

C13 CAP, CERM, 0.01 uF, 50

V, +/- 5%, X7R, 0603 Kemet C0603C103J5RACTU 1

D1, D2 LED, Green, SMD Lite-On LTST-C190GKT 2

H1, H2, H3, H4

Machine Screw, Round,

#4-40 x 1/4, Nylon, Philips

panhead

B&F Fastener Supply NY PMS 440 0025 PH 4

H5, H6, H7, H8 Standoff, Hex, 0.5"L #4-40

Nylon Keystone 1902C 4

J1, J3 Header, 100mil, 2x1, Gold,

TH Samtec TSW-102-07-G-S 2

J2, J4, J6 Header, 2.54mm, 3x2,

Gold, Black, SMT

Sullins Connector

Solutions GBC03DABN-M30 3

J5 Header, 100mil, 3x1, Gold,

TH Samtec TSW-103-07-G-S 1

LBL1

Thermal Transfer Printable

Labels, 0.650" W x 0.200"

H - 10,000 per roll

Brady THT-14-423-10 1

P1, P2, P3, P4, P5 Connector, End launch

SMA, 50 ohm, SMT Cinch Connectivity 142-0701-851 5

R1, R5, R8, R9, R10, R16,

R17, R18

RES, 0, 5%, 0.1 W, AEC-

Q200 Grade 0, 0603 Vishay-Dale CRCW06030000Z0EA 8

R6, R7, R13, R14 RES, 220, 5%, 0.1 W,

AEC-Q200 Grade 0, 0603 Vishay-Dale CRCW0603220RJNEA 4

R19, R20 RES, 120, 5%, 0.1 W,

AEC-Q200 Grade 0, 0603 Vishay-Dale CRCW0603120RJNEA 2

R21 RES, 1.87 k, 1%, 0.1 W,

AEC-Q200 Grade 0, 0603 Vishay-Dale CRCW06031K87FKEA 1

R22 RES, 2.43 k, 1%, 0.1 W,

AEC-Q200 Grade 0, 0603 Vishay-Dale CRCW06032K43FKEA 1

R23 RES, 3.57 k, 1%, 0.1 W,

AEC-Q200 Grade 0, 0603 Vishay-Dale CRCW06033K57FKEA 1

R24 RES, 1.50 k, 1%, 0.1 W,

AEC-Q200 Grade 0, 0603 Vishay-Dale CRCW06031K50FKEA 1

R25, R26 RES, 1.15 k, 1%, 0.1 W,

AEC-Q200 Grade 0, 0603 Vishay-Dale CRCW06031K15FKEA 2

Bill of Materials www.ti.com

10 LMK6EVM User's Guide SNAU277A – APRIL 2022 – REVISED DECEMBER 2022

Submit Document Feedback

Tabla de contenidos

Otros manuales de Placa madre de Texas Instruments

Texas Instruments

Texas Instruments INA228EVM Manual de usuario

Texas Instruments

Texas Instruments BQ25176J Manual de usuario

Texas Instruments

Texas Instruments AFE7070 Manual de usuario

Texas Instruments

Texas Instruments TMAG5115 Manual de usuario

Texas Instruments

Texas Instruments LMK1C1104 Manual de usuario

Texas Instruments

Texas Instruments CC2541EM Manual de usuario

Texas Instruments

Texas Instruments LMT01EVM Manual de usuario

Texas Instruments

Texas Instruments BQ24702/03 EVM Manual de usuario

Texas Instruments

Texas Instruments UCC25660 Series Manual de usuario

Texas Instruments

Texas Instruments CC85-CC2590EM Series Manual de usuario

Texas Instruments

Texas Instruments TPS62851 EVM-139 Series Manual de usuario

Texas Instruments

Texas Instruments AN-1955 LM5009A Manual de usuario

Texas Instruments

Texas Instruments TPA6304-Q1 Manual de usuario

Texas Instruments

Texas Instruments MultiPkgLDOEVM-823 Manual de usuario

Texas Instruments

Texas Instruments BQ2430 Series Manual de usuario

Texas Instruments

Texas Instruments DLP5532HBQ1EVM Manual de usuario

Texas Instruments

Texas Instruments TSC2013EVM Manual de usuario

Texas Instruments

Texas Instruments PCIE16X-800EVK Manual de usuario

Texas Instruments

Texas Instruments ISO721EVM Manual de usuario

Texas Instruments

Texas Instruments BUF22821EVM-USB Manual de usuario

Texas Instruments

Texas Instruments LM66200EVM Manual de usuario

Texas Instruments

Texas Instruments TPS25980EVM Manual de usuario

Texas Instruments

Texas Instruments Track bq27520EVM Manual de usuario

Texas Instruments

Texas Instruments Jacinto7 Manual de usuario

Manuales populares de Placa madre de otras marcas

DFI

DFI SD170 Manual de usuario

ASROCK

ASROCK ROMED8-2T Manual de usuario

Asus

Asus P2L97A Manual de usuario

Winmate

Winmate IC70 Manual de usuario

Asus

Asus MES-B Manual de usuario

Grantech

Grantech SYS8F377VGGA-3OMN Manual de usuario

Telit Wireless Solutions

Telit Wireless Solutions SL869-3DR Manual de usuario

Gigabyte

Gigabyte GA-9IVDT Manual de usuario

Commell

Commell MS-C73 Manual de usuario

IBT Technologies

IBT Technologies MB860 Manual de usuario

Nvidia

Nvidia TEGRA DG-04927-001_V01 Manual de usuario

Biostar

Biostar M7VIT Bravo Instrucciones de funcionamiento e instalación

Intel

Intel D33217CK Manual de usuario

Asus

Asus F1A55-M LX PLUS R2.0 Manual de usuario

EPC

EPC EPC9147C Manual de usuario

Asus

Asus EX-B760M-V5 D4 Manual de usuario

EPOX

EPOX MU-8KHA0010 Manual de usuario

Ski-Doo

Ski-Doo Bombardier MPEM 219 700 090 Manual de usuario