Analog Devices Linear Technology LTC6953 Quick setup guide

dc2610af

DEMO MANUAL DC2610A

DESCRIPTION

LTC6953

Ultralow Jitter, 4.5GHz Clock Distributor with 11 Outputs

and JESD204B Support

Demonstration circuit 2610A features the LTC6953, an

Ultralow Jitter, 4.5GHz Clock Distributor with 11 Outputs

and JESD204B Support.

By default, the DC2610A is powered from a single 3.3V

supply. An option is provided to power to the DC2610A

from dual supplies, allowing for the LTC6953’s output

supply pins to connect to an LTC Silent Switcher

and the

LTC6953 input supply pin to connect to a low noise LDO.

All differential inputs and seven of the differential outputs

are populated with 0.5”spaced SMA connectors. These

outputs are AC-coupled with 50Ω transmission lines mak

ing them suitable to drive 50Ω impedance instruments.

The remaining four differential outputs are terminated

with 100Ω.

L, LT, LTC, LTM, Linear Technology, Silent Switcher and the Linear logo are registered

trademarks and LTC6952 Wizard, QuickEval and EZSync are trademarks of Analog Devices, Inc.

All other trademarks are the property of their respective owners.

The LTC6953’s EZSync™and SYSREF request func-

tions are made available via the LTC6953 SPI interface

or the EZS_SRQ SMA/turret connectors. The DC2609A,

DC2610A, and DC2611A SMA placement was designed

for ease of connection for all multi-part synchronization

and SYSREF request modes.

A calibration path is provided to aid in accurate LTC6953

propagation delay measurements.

A DC2026 USB serial controller board is used for SPI

communication with the LTC6953, controlled by the sup-

plied LTC6952Wizard™ software.

Design files for this circuit board are available at

http://www.linear.com/demo/DC2610A

EZS_SRQ INPUT,

SMA & TURRET

RIBBON CABLE CONNECTION

TO DC590 OR DC2026

OUT1, CML

OUTPUTS, SMA

OUT0, CML

OUTPUTS, SMA

SINGLE SUPPLY

J30 & J31

OUT9, CML

OUTPUTS, SMA

OUT8, CML

OUTPUTS, SMA

OUT10, CML

OUTPUTS, SMA

IN INPUT,

SMA & TURRET

VIN33 OPTION,

OUT5, CML

OUTPUTS, SMA OUT4, CML

OUTPUTS, SMA

STAT LED, D1

AC-COUPLED

3.3V INPUT,

BANANA JACKS

AC-COUPLED

REFER TO DC2610

RECONFIGURATION

AC-COUPLED

LTC6953

DEMO CIRCUIT 2610A

Figure 1. DC2610A Connections

dc2610af

DEMO MANUAL DC2610A

QUICK START PROCEDURE

The DC2610A is easy to set up to evaluate the perfor-

mance of the LTC6953. Follow the procedure below.

The LTC6952Wizard and the DC2026 are required to con-

trol the DC2610A through a personal computer (PC).

DC2026 CONFIGURATION

Refer to Figure 2. Set the JP3 jumper to the 3.3V (pre-

ferred) or 5V position.

Connect the DC2026 to one of your computer’s USB ports

with the included USB cable.

The DC2026 has the ability to run Linduino code, refer

to http://www.linear.com/solutions/linduino and the Fre-

quently Asked Question section (Question #2) for more

details.

LTC6952WIZARD INSTALLATION

The LTC6952Wizard software is used to communi-

cate with the LTC6953. It uses the DC2026 to translate

between USB and SPI-compatible serial communications

formats. It also includes advanced design and simulation

capabilities. The following are the LTC6952Wizard system

requirements:

•Windows Operating System:Windows XP, Windows

2003 Server, Windows Vista, Windows 7

• Microsoft .NET 3.5 SP1 or later

• Windows Installer 3.1 or later

•Linear Technology’s DC2026 (with the DC590B emula-

tor sketch loaded)

The DC2026 arrives from the factory with the DC590B

Emulator sketch loaded. If this is not the case refer to the

troubleshooting section.

Figure 2. DC2026 Connector Location

J5, USB

CONNECTION

TO PC

J1, RIBBON CABLE

CONNECTION

TO DC2610A

JP3,SELECT

3.3V OPTION

dc2610af

DEMO MANUAL DC2610A

QUICK START PROCEDURE

Download the LTC6952Wizard setup file at www.linear.

com/LTC6952Wizard.

Run the LTC6952Wizard setup file and follow the instruc

tions given on the screen. The setup file will verify and/

or install Microsoft .NET and install the LTC6952Wizard.

Refer to the LTC6952Wizard Help menu for software

operation.

DC2610A CONFIGURATION

1. Connect J30 and J31 to a power supply and apply

power (see Figure 1 and the Typical DC2610A Require-

ments and Characteristics table).

2. Connect the DC2026 to the DC2610A with the provided

ribbon cable.

3. Connect a low phase-noise (low jitter) single-ended

signal to IN–(J28). Refer to the LTC6953 data sheet

for acceptable input frequencies and amplitudes.

4. Run the LTC6952Wizard application.

5. In LTC6952Wizard, click File →Load Settings and

select file “LTC6953 EZSync StandAlone.6952set”.

The DC2610A’s red STAT LED (D1) should illuminate.

6. From the LTC6952Wizard, update Fin to the frequency

of the input signal in step 3. This will update the

LTC6952Wizard with the correct output frequencies.

7. Synchronize outputs by toggling the LTC6953 SSYNC

bit on then off from the LTC6952Wizard.

8. Connect desired output (OUT10, OUT9, OUT8, OUT5,

OUT4, OUT1 or OUT0) to a test instrument or other

demo board to evaluate performance.

Be sure to power down or terminate any unused RF output

with 50Ω, or poor spurious performance may result.

Figure 3. LTC6952Wizard Screenshot

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DEMO MANUAL DC2610A

TROUBLESHOOTING GUIDE

If the red LED (D1) does not illuminate:

1. Ensure LTC6953 input signal is at the LTC6953 IN

–

pin.

2. In LTC6952Wizard’s System tab click ‘Read All’.

LTC6952Wizard should match Figure 3. If not, see ‘Verify

DC2610A and LTC6952Wizard Communication’

Verify DC2610A and LTC6952Wizard Communication:

To verify communication with the DC2610A. The bottom

status line in LTC6952Wizard should read “LTC6953”and

“Comm Enabled”as shown in Figure 3. If not, then per-

form the following steps:

1. Ensure the DC2026 is connected to PC

2. Disconnect and Reconnect DC2026 to PC

3. Ensure DC2026 is connected to DC2610A

4. Close LTC6952Wizard and restart

5. Verify the DC2026 has the DC590B Emulator sketch

loaded by contacting the factory or following these

steps.

a. Download QuickEval™ at

http://www.linear.com/designtools/software/#Data

b. Run QuickEval (Linduino connected to the PC)

If QuickEval does not find a DC590B, reload the DC590

Linduino sketch. To use the LTSketchbook refer to the Lin-

duino QuickStart tab at http://www.linear.com/solutions/

linduino for instructions on how to start using Linduino.

If DC2610A performance is less than the LTC6953 data

sheet specifications:

1. For unexpected spurious response, verify power sup-

plies are low noise and spurious free power supplies.

Power supplies that are based off a switching regulator

architecture are known to generate spurs on low jitter

clock outputs.

2. For poor phase noise results, verify the phase noise

specifications of the input signal and the phase noise

measurement instrument. Traditional signal sources

and spectrum analyzers have higher phase noise than

the LTC6953 and will degrade measurement results.

To measure phase noise performance it is recom-

mended to use a low jitter oscillator and a signal source

analyzer, such as Keysight’s (previously Agilent/HP)

E5052.

3. Contact the factory for further troubleshooting.

dc2610af

DEMO MANUAL DC2610A

DC2610A RECONFIGURATION

The following covers the hardware reconfiguration of the

DC2610A. Refer to LTC6952Wizard and the LTC6953 data

sheet to better understand how to change programmed

parameters on the DC2610A.

POWER SUPPLY OPTIONS

Table 1 provides the power supply options for DC2610A.

By default the DC2610A is setup to use the single supply

option. However, a dual supply option is available to power

the higher current supply from an LTC Silent Switcher,

such as the LT8609S. The LTC Silent Switcher improves

the power efficiency over the low noise LDO. A low noise

LDO is required on the LTC6953’s VIN+supply pin.

Table 1. Power Supply Options

Power Supply Voltage/Current

(Recommended Supply)

Default Option R4 J30 (3.3V) E23 (VIN33)

X Single

Supply

Installed 3.3V/1.5A

(Low Noise LDO)

Dual

Supply

Do Not

Install

3.3V/1.5A

(LTC Silent

Switcher)

3.3V/150mA

(Low Noise LDO)

INPUT TERMINATION OPTIONS

Table 2 provides the single-ended and differential input

termination options. By default the DC2610A is setup for

a single-ended input on the IN–SMA (J28).

Table 2: Input Termination Options (*)

Default Termination R26

R30

R29

R37

C59

µF

C60

µF

X SE, IN–75 30 DNI DNI 0.1 DNI

SE, IN+30 75 DNI DNI DNI 0.1

DIFF, CML or

PECL

DNI DNI 160 DNI 0.1 0.1

DIFF, LVDS DNI DNI DNI 160 0.1 0.1

* SE = Single-Ended, DIFF = Differential, DNI = Do Not Install

LTC6953 6952SET FILES

The LTC6952Wizard provides a 6952set file for all

LTC6953 data sheet application examples and typical

application circuits. After loading a 6952set file a pop-up

window will detail any user actions and board modifica-

tions required for the selected file.

SYNC OPTIONS

The LTC6953 data sheet describes several synchroniza-

tion modes. After selecting the desired synchronization

mode, refer to Table 3 to identify the required DC2610A

board modifications. Refer to the LTC6953 data sheet for

SYNC timing and level requirements.

CML OUTPUTS, OUT[10:0]

The DC2610A has 11 CML outputs. Seven of these out-

puts are AC-coupled and brought out to SMAs (OUT10,

OUT9, OUT8, OUT5, OUT4, OUT1, and OUT0). To drive

50Ω impedance instruments connect OUTx+to the instru-

ment and OUTx–to a 50Ω termination, or vice versa.

The remaining four outputs (OUT7, OUT6, OUT3, and

OUT2) are terminated with a 100Ω resistor on board. To

connect these outputs to a 50Ω instrument, remove the

100Ω termination, and install the appropriate SMAs and

AC blocking capacitors.

Refer to LTC6953 data sheet for differential termination

options.

dc2610af

DEMO MANUAL DC2610A

Table 3. LTC6953 Sync Mode Programming Options

Board Modifications (DNI = Do Not Install)

SYNC/SYSREF

Method

EZS_SRQ Pins

State

R27 (Ω) R24 (Ω) R25 (Ω) R28 (Ω) R23 (Ω) R39 (Ω) R38 (Ω)

EZS_SRQ Pin Differential, CML

or LVPECL

DNI DNI 100 0 0 DNI DNI

Differential LVDS 100 100 750 50 50 130 130

EZS_SRQ+: CMOS

EZS_SRQ–: GND

200k 0 DNI 0 0 DNI DNI

SSRQ Register Bit EZS_SRQ+: GND

EZS_SRQ–: GND

200k 0 DNI 0 0 DNI DNI

DC2610A RECONFIGURATION

FREQUENTLY ASKED QUESTIONS

1. Can the LTC6952Wizard control a LTC6953 on a board other than the DC2610A?

Yes, follow these steps.

Step 1: Configure the DC2026 for 3.3V SPI as shown in Figure 2

Step 2:Connect the DC2026 J1 connector SPI pins to the LTC6953 SPI pins. Refer to page two of the DC2610A sche-

matic for pin assignments.

2. Does the LTC6953 have Linduino Code available?

Yes, download the LTC6953 sketch in the LTSketchbook. To use the LTSketchbook and for instructions on how to

start using Linduino refer to the Linduino QuickStart tab at http://www.linear.com/solutions/linduino. This will give

programmers a head start in writing code for the LTC6953. It is recommended to use LTC6952Wizard to create the

best possible register settings for all conditions. These LTC6953 register settings from LTC6952Wizard can be pro-

grammed in a lookup table.

dc2610af

DEMO MANUAL DC2610A

TYPICAL DC2610A REQUIREMENTS AND CHARACTERISTICS

ASSEMBLY OPTIONS

PARAMETER INPUT OR OUTPUT PHYSICAL LOCATION DETAILS

3.3V Power Supply Input J30 and J31 BNC Banana Jacks If R4 Populated, Default Option, Single Supply: 3.3V

Low-noise and spur-free supply, 1.5A;

If R4 Depopulated, Dual Supply Option, allows

for experiments with more efficient power supply

evaluation (LTC Silent Switcher).

See 3.3V Power Supply #2 (VIN33)

3.3V Power Supply #2 (VIN33) Input E23 turret (VIN33) If R4 Depopulated, Dual Supply Option, 3.3V Low-

noise and spur-free supply, 150mA;

OUT10+; OUT10–Two Outputs J1 and J2 SMA Connectors* CML, AC-Coupled, 800mVpk Differential

OUT9+; OUT9–J3 and J4 SMA Connectors*

OUT8+; OUT8–J5 and J6 SMA Connectors*

OUT5+; OUT5–J19 and J20 SMA Connectors*

OUT4+; OUT4–J17 and J18 SMA Connectors*

OUT1+; OUT1–J11 and J12 SMA Connectors*

OUT0+; OUT0–J9 and J10 SMA Connectors*

OUT7+; OUT7–Two Outputs

(Not Connected)

J7 and J8 (SMA Not Populated) Onboard Differential 100Ω termination

OUT6+; OUT6–J21 and J22 (SMA Not Populated)

OUT3+; OUT3–J15 and J16 (SMA Not Populated)

OUT2+; OUT2–J13 and J14 (SMA Not Populated)

IN+Input

(Not connected)

J29 SMA Connector Default: Not Connected

(see Table 2, for correct input termination options)

IN–Input J28 SMA Connector Default: Preferred Single Ended Input

(see Table 2, for correct input termination options)

EZS_SRQ+Input J27 SMA Connector/E20 Turret Default: Preferred Single Ended Input

EZS_SRQ–Input J26 SMA Connector/E19 Turret Default: Shorted to GND

ISD Input Test Point 3.3V(Default): Device Active, set by pull-up resistor

GND: Shut Down Device

STAT Output STATUS Turret Red LED D1 illuminates when STAT pin in high state

*Any unused RF output must be powered down or terminated with 50Ω, or poor spurious performance may result.

Table 5. DC2610A Options

Assembly Version Part Number

DC2610A-A LTC6953IUKG

dc2610af

DEMO MANUAL DC2610A

PARTS LIST

ITEM QTY REFERENCE PART DESCRIPTION MANUFACTURER/PART NUMBER

Required Circuit Components

1 24 C1-C12, C17-C20, C51-C59, C61 CAP., X7R, 0.1µF, 10V, 10%, 0402 MURATA, GRM155R71A104KA01D

2 0 C7, C8, C13-C16, C21, C22, C60 CAP., 0402 OPT

3 13 C24-C36 CAP., X7R, 0.01µF, 6.3V, 10%, 0201 MURATA, GRM033R70J103KA01D

4 1 C37 CAP., X5R, 0.1µF, 16V, 10%, 0201 MURATA, GRM033R61C104KE14D

5 11 C38-C48 CAP., X5R, 1µF, 16V, 10%, 0402 MURATA, GRM155R61C105KE01D

6 1 C49 CAP., X7R, 10µF, 25V, 10%, 1206 MURATA, GRM31CR71E106KA12L

7 1 C62 CAP.,TANT., 330µF,10V, 10%, 7343 AVX, TPME337K010R0035

8 1 D1 LED, RED, LED-ROHM-SML-01 ROHM, SML-012V8TT86

9 10 E14-E23 TURRET, TESTPOINT 0.064" MILL-MAX, 2308-2-00-80-00-00-07-0

10 1 JP1 CONN., HEADER, MALE, 1 ×3, 2mm, THT Wurth Elektronik, 62000311121

11 20 J1-J6, J9-J12, J17-J20, J24-J29 CONN., SMA 50Ω EDGE-LAUNCH CCSJ, 142-0701-851

12 0 J7, J8, J13-J16, J21, J22 CONN., SMA 50Ω EDGE-LAUNCH OPT

13 1 J23 CONN., HEADER, 14-PIN, 2mm MOLEX, 87831-1420

14 2 J30, J31 CONN, JACK, BANANA KEYSTONE, 575-4

15 5 R4, R19, R23, R24, R28 RES., CHIP, 0, 1/10W, 0402 VISHAY, CRCW04020000Z0ED

16 6 R6, R10, R11, R21, R27, R36 RES., CHIP, 200K, 1/10W, 1% 0402 VISHAY, CRCW0402200KFKED

17 9 R7-R9, R18, R31-R35 RES., CHIP, 100, 1/16W, 1% 0402 VISHAY, CRCW0402100RFKED

18 3 R12, R13, R14 RES., CHIP, 4.99K, 1/10W, 1% 0402 VISHAY, CRCW04024K99FKED

19 0 R15, R29, R37, R38, R39 RES., 0402 OPT

20 1 R20 RES., CHIP, 0, 1/10W, 0603 VISHAY, CRCW06030000Z0EA

21 1 R22 RES., CHIP, 330, 1/16W, 1% 0402 VISHAY, CRCW0402330RFKED

22 0 R25 RES., CHIP, 100, 1/16W, 1% 0402 OPT

23 1 R26 RES., CHIP, 75, 1/16W, 1% 0402 VISHAY, CRCW040275R0FKED

24 1 R30 RES., CHIP, 30, 1/16W, 1% 0402 VISHAY, CRCW040230R0FKED

25 1 U1 I.C., QFN52UKG-7 ×8 LINEAR TECH., LTC6953IUKG#PBF

26 1 U2 I.C., Serial EEPROM, TSSOP8 MICROCHIP, 24LC025-I /ST

27 2 U3,U4 I.C., Dual Buffer, SC70-6 FAIRCHILD SEMI., NC7WZ17P6X

28 1 U5 I.C., Single Bit, Dual Supply, 3-State Output, SOT363 NXP SEMI., 74LVC1T45GW,125

29 1 SHUNT ON JP1 (1&2) SHUNT, 2mm Wurth Elektronik, 60800213421

30 4 MH1-MH4 STANDOFF, NYLON, 0.5, 1/2" Wurth Elektronik, 702935000

31 1 DUST CAP FOR J29 WYHP DUST CAP FOR SMA FEMALE RF CONN AMAZON,

dc2610af

DEMO MANUAL DC2610A

SCHEMATIC DIAGRAM

D D

C C

B B

A A

3.3V SUPPLIES

1. ALL RESISTORS AND CAPACITORS ARE 0402.

NOTES: UNLESS OTHERWISE SPECIFIED

PLACE ON TOP SIDE

PLACE ON BOTTOM SIDE

[3] [2]

[2]. J29 = INSTALLED BUT UNUSED.

[3]. COMPONENTS WILL BE STUFFED WITH DEFAULT VALUES.

IN-/IN+ TERMINATIONS OPTIONS

DIFFERENTIAL

S-E IN- (DEFAULT)

S-E IN+

R26 R29 R30 C59 C60

OPT75 30 0.1uF

0.1uF0.1uF

7530 OPT OPT

OPT

0.1uF

OPTOPT 160

OTHER VALUES ARE FOR LAB USED ONLY.

[3]

ALL INPUT AND OUTPUT CONNECTIONS ARE

SAME LENGTH, 50 OHM CONTROLLED

IMPEDANCE, USING 20 MIL TRACES, 20 MIL GAP.

OUT0+

OUT0-

OUT1+

OUT1-

OUT2+

OUT2-

OUT3+

OUT4+

OUT4-

OUT5+

OUT5-

OUT6+

OUT6-

OUT7+

OUT7-

OUT8+

OUT8-

OUT9-

OUT10-

OUT10+

STAT

EZS_SRQ-

EZS_SRQ+

IN-

IN+

OUT9+

OUT3-

3.3V

3.3V 3.3V 3.3V 3.3V

3.3V

3.3V VIN33

VIN33

3.3V

VIN33

SDCS

SDI

SDO

SCLK

REVISION HISTORY

DESCRIPTION DATEAPPROVEDECO REV

CHRIS P.2ND PROTOTYPE

__ 2 03-21-17

REVISION HISTORY

DESCRIPTION DATEAPPROVEDECO REV

CHRIS P.2ND PROTOTYPE

__ 2 03-21-17

REVISION HISTORY

DESCRIPTION DATEAPPROVEDECO REV

CHRIS P.2ND PROTOTYPE

__ 2 03-21-17

SIZE

DATE:

IC NO. REV.

SHEET OF

TITLE:

APPROVALS

PCB DES.

APP ENG.

TECHNOLOGY Fax: (408)434-0507

Milpitas, CA 95035

Phone: (408)432-1900

1630 McCarthy Blvd.

LTC Confidential-For Customer Use Only

CUSTOMER NOTICE

LINEAR TECHNOLOGY HAS MADE A BEST EFFORT TO DESIGN A

CIRCUIT THAT MEETS CUSTOMER-SUPPLIED SPECIFICATIONS;

HOWEVER, IT REMAINS THE CUSTOMER'S RESPONSIBILITY TO

VERIFY PROPER AND RELIABLE OPERATION IN THE ACTUAL

APPLICATION. COMPONENT SUBSTITUTION AND PRINTED

CIRCUIT BOARD LAYOUT MAY SIGNIFICANTLY AFFECT CIRCUIT

PERFORMANCE OR RELIABILITY. CONTACT LINEAR

TECHNOLOGY APPLICATIONS ENGINEERING FOR ASSISTANCE.

THIS CIRCUIT IS PROPRIETARY TO LINEAR TECHNOLOGY AND

SCHEMATIC

SUPPLIED FOR USE WITH LINEAR TECHNOLOGY PARTS.

SCALE = NONE

www.linear.com

DEMO CIRCUIT 2610A

Tuesday, March 21, 2017

ULTRALOW JITTER CLOCK DISTRIBUTOR

N/A

LTC6953IUKG

KIM T.

CHRIS P.

WITH 11 OUTPUTS AND JESD204B SUPPORT

SIZE

DATE:

IC NO. REV.

SHEET OF

TITLE:

APPROVALS

PCB DES.

APP ENG.

TECHNOLOGY Fax: (408)434-0507

Milpitas, CA 95035

Phone: (408)432-1900

1630 McCarthy Blvd.

LTC Confidential-For Customer Use Only

CUSTOMER NOTICE

LINEAR TECHNOLOGY HAS MADE A BEST EFFORT TO DESIGN A

CIRCUIT THAT MEETS CUSTOMER-SUPPLIED SPECIFICATIONS;

HOWEVER, IT REMAINS THE CUSTOMER'S RESPONSIBILITY TO

VERIFY PROPER AND RELIABLE OPERATION IN THE ACTUAL

APPLICATION. COMPONENT SUBSTITUTION AND PRINTED

CIRCUIT BOARD LAYOUT MAY SIGNIFICANTLY AFFECT CIRCUIT

PERFORMANCE OR RELIABILITY. CONTACT LINEAR

TECHNOLOGY APPLICATIONS ENGINEERING FOR ASSISTANCE.

THIS CIRCUIT IS PROPRIETARY TO LINEAR TECHNOLOGY AND

SCHEMATIC

SUPPLIED FOR USE WITH LINEAR TECHNOLOGY PARTS.

SCALE = NONE

www.linear.com

DEMO CIRCUIT 2610A

Tuesday, March 21, 2017

ULTRALOW JITTER CLOCK DISTRIBUTOR

N/A

LTC6953IUKG

KIM T.

CHRIS P.

WITH 11 OUTPUTS AND JESD204B SUPPORT

SIZE

DATE:

IC NO. REV.

SHEET OF

TITLE:

APPROVALS

PCB DES.

APP ENG.

TECHNOLOGY Fax: (408)434-0507

Milpitas, CA 95035

Phone: (408)432-1900

1630 McCarthy Blvd.

LTC Confidential-For Customer Use Only

CUSTOMER NOTICE

LINEAR TECHNOLOGY HAS MADE A BEST EFFORT TO DESIGN A

CIRCUIT THAT MEETS CUSTOMER-SUPPLIED SPECIFICATIONS;

HOWEVER, IT REMAINS THE CUSTOMER'S RESPONSIBILITY TO

VERIFY PROPER AND RELIABLE OPERATION IN THE ACTUAL

APPLICATION. COMPONENT SUBSTITUTION AND PRINTED

CIRCUIT BOARD LAYOUT MAY SIGNIFICANTLY AFFECT CIRCUIT

PERFORMANCE OR RELIABILITY. CONTACT LINEAR

TECHNOLOGY APPLICATIONS ENGINEERING FOR ASSISTANCE.

THIS CIRCUIT IS PROPRIETARY TO LINEAR TECHNOLOGY AND

SCHEMATIC

SUPPLIED FOR USE WITH LINEAR TECHNOLOGY PARTS.

SCALE = NONE

www.linear.com

DEMO CIRCUIT 2610A

Tuesday, March 21, 2017

ULTRALOW JITTER CLOCK DISTRIBUTOR

N/A

LTC6953IUKG

KIM T.

CHRIS P.

WITH 11 OUTPUTS AND JESD204B SUPPORT

J10

SMA

OUT0-

C25

0.01uF

0201

E23

VIN33

C56

0.1uF

J13

SMA

OUT2+

OPT

SMA

OUT8-

0.1uF

J29

SMA

IN+

LTC6953

VOUT+ 32

OUT1+ 31

OUT1- 30

VOUT+ 29

OUT2+ 28

OUT2- 27

VOUT+

OUT3+

OUT3-

VOUT+

VD+

OUT10-

OUT10+

VOUT+

OUT9-

OUT9+

VOUT+

OUT8-

OUT8+

VOUT+

OUT7-

VIN+ 39

IN- 38

OUT7+

VOUT+

OUT5+

OUT6+

OUT4-

OUT4+

OUT5-

IN+ 37

NC 36

OUT0+ 34

VOUT+ 35

OUT6-

OUT0- 33

SD 40

GND 41

NC 42

NC 43

VREF+ 44

NC 45

NC 46

EZS_SRQ+ 47

EZS_SRQ- 48

STAT 49

SCLK 50

SDO 51

SDI 52

EP 53

SMA

OUT9+

C61

0.1uF

C19

0.1uF

C20

0.1uF

J14

SMA

OUT2-

OPT

JP1

HD1X3-079

LED

STAT 1

0.1uF

C32

0.01uF

0201

C15

OPT

R22

330

SMA

OUT9-

E22

C57

0.1uF

C30

0.01uF

0201

C18

0.1uF

C28

0.01uF

0201

J16

SMA

OUT3-

OPT

C14

OPT

R29

OPT

R28

J17

SMA

OUT4+

0.1uF

J24

SMA

CAL_OUT

R33

100

E15

GND

R32

100

J20

SMA

OUT5-

C37

0.1uF

0201

C10

0.1uF

J18

SMA

OUT4-

C31

0.01uF

0201

E14

GND

J26

SMA

EZS_SRQ-

C48

1uF

SMA

OUT7+

OPT

E20

EZS_SRQ+

C35

0.01uF

0201

C59

0.1uF

C17

0.1uF

SMA

OUT8+

OPT

J15

SMA

OUT3+

OPT

C42

1uF

0.1uF

C24

0.01uF

0201

C21

OPT

J11

SMA

OUT1+

E21

J25

SMA

CAL_IN

R24

C13

OPT

R25

100

OPT

R39

OPT

C44

1uF

C22

OPT

J30

3.3V

KEY-575

E18

GND

SMA

OUT10-

C43

1uF

C29

0.01uF

0201

C38

1uF

R26

R38

OPT

0.1uF

SMA

OUT0+

C46

1uF

J21

SMA

OUT6+

OPT

J19

SMA

OUT5+

C47

1uF

C62

330uF

10V

7343

C45

1uF

OPT

C34

0.01uF

0201

R23

J28

SMA

IN-

C11

0.1uF

J12

SMA

OUT1-

C27

0.01uF

0201

J22

SMA

OUT6-

OPT

R31

100

0.1uF

J27

SMA

EZS_SRQ+

E19

EZS_SRQ-

R27

200k

C39

1uF C40

1uF C41

1uF

R30

C12

0.1uF

C26

0.01uF

0201

E16

GND

SMA

OUT7-

OPT

C58

0.1uF

E17

GND

C36

0.01uF

0201

C49

10uF

1206 C33

0.01uF

0201

J31

GND

KEY-575

C16

OPT

SMA

OUT10+

RED

STAT

2 1

R37

OPT

R34

100

C60

OPT

0.1uF

dc2610af

DEMO MANUAL DC2610A

SCHEMATIC DIAGRAM

D D

C C

B B

A A

EEPROM FOR BOARD IDENTIFICATION

DC2026 (DC590) SPI INTERFACE

3.3V

SCLK

SDI

SDO

SIZE

DATE:

IC NO. REV.

SHEET OF

TITLE:

APPROVALS

PCB DES.

APP ENG.

TECHNOLOGY Fax: (408)434-0507

Milpitas, CA 95035

Phone: (408)432-1900

1630 McCarthy Blvd.

LTC Confidential-For Customer Use Only

CUSTOMER NOTICE

LINEAR TECHNOLOGY HAS MADE A BEST EFFORT TO DESIGN A

CIRCUIT THAT MEETS CUSTOMER-SUPPLIED SPECIFICATIONS;

HOWEVER, IT REMAINS THE CUSTOMER'S RESPONSIBILITY TO

VERIFY PROPER AND RELIABLE OPERATION IN THE ACTUAL

APPLICATION. COMPONENT SUBSTITUTION AND PRINTED

CIRCUIT BOARD LAYOUT MAY SIGNIFICANTLY AFFECT CIRCUIT

PERFORMANCE OR RELIABILITY. CONTACT LINEAR

TECHNOLOGY APPLICATIONS ENGINEERING FOR ASSISTANCE.

THIS CIRCUIT IS PROPRIETARY TO LINEAR TECHNOLOGY AND

SCHEMATIC

SUPPLIED FOR USE WITH LINEAR TECHNOLOGY PARTS.

SCALE = NONE

www.linear.com

DEMO CIRCUIT 2610A

Tuesday, March 21, 2017

ULTRALOW JITTER CLOCK DISTRIBUTOR

N/A

LTC6953IUKG

KIM T.

CHRIS P.

WITH 11 OUTPUTS AND JESD204B SUPPORT

SIZE

DATE:

IC NO. REV.

SHEET OF

TITLE:

APPROVALS

PCB DES.

APP ENG.

TECHNOLOGY Fax: (408)434-0507

Milpitas, CA 95035

Phone: (408)432-1900

1630 McCarthy Blvd.

LTC Confidential-For Customer Use Only

CUSTOMER NOTICE

LINEAR TECHNOLOGY HAS MADE A BEST EFFORT TO DESIGN A

CIRCUIT THAT MEETS CUSTOMER-SUPPLIED SPECIFICATIONS;

HOWEVER, IT REMAINS THE CUSTOMER'S RESPONSIBILITY TO

VERIFY PROPER AND RELIABLE OPERATION IN THE ACTUAL

APPLICATION. COMPONENT SUBSTITUTION AND PRINTED

CIRCUIT BOARD LAYOUT MAY SIGNIFICANTLY AFFECT CIRCUIT

PERFORMANCE OR RELIABILITY. CONTACT LINEAR

TECHNOLOGY APPLICATIONS ENGINEERING FOR ASSISTANCE.

THIS CIRCUIT IS PROPRIETARY TO LINEAR TECHNOLOGY AND

SCHEMATIC

SUPPLIED FOR USE WITH LINEAR TECHNOLOGY PARTS.

SCALE = NONE

www.linear.com

DEMO CIRCUIT 2610A

Tuesday, March 21, 2017

ULTRALOW JITTER CLOCK DISTRIBUTOR

N/A

LTC6953IUKG

KIM T.

CHRIS P.

WITH 11 OUTPUTS AND JESD204B SUPPORT

SIZE

DATE:

IC NO. REV.

SHEET OF

TITLE:

APPROVALS

PCB DES.

APP ENG.

TECHNOLOGY Fax: (408)434-0507

Milpitas, CA 95035

Phone: (408)432-1900

1630 McCarthy Blvd.

LTC Confidential-For Customer Use Only

CUSTOMER NOTICE

LINEAR TECHNOLOGY HAS MADE A BEST EFFORT TO DESIGN A

CIRCUIT THAT MEETS CUSTOMER-SUPPLIED SPECIFICATIONS;

HOWEVER, IT REMAINS THE CUSTOMER'S RESPONSIBILITY TO

VERIFY PROPER AND RELIABLE OPERATION IN THE ACTUAL

APPLICATION. COMPONENT SUBSTITUTION AND PRINTED

CIRCUIT BOARD LAYOUT MAY SIGNIFICANTLY AFFECT CIRCUIT

PERFORMANCE OR RELIABILITY. CONTACT LINEAR

TECHNOLOGY APPLICATIONS ENGINEERING FOR ASSISTANCE.

THIS CIRCUIT IS PROPRIETARY TO LINEAR TECHNOLOGY AND

SCHEMATIC

SUPPLIED FOR USE WITH LINEAR TECHNOLOGY PARTS.

SCALE = NONE

www.linear.com

DEMO CIRCUIT 2610A

Tuesday, March 21, 2017

ULTRALOW JITTER CLOCK DISTRIBUTOR

N/A

LTC6953IUKG

KIM T.

CHRIS P.

WITH 11 OUTPUTS AND JESD204B SUPPORT

R19

R10

200k

EEGND

200k

R20

0603

100

R11

200k

R18

100

GND VCC

NC7WZ17P6X

1 6

100

GND VCC

NC7WZ17P6X

1 6

C51

0.1uF

V+DIG

C53

0.1uF

100

R13

4.99k

SCLK

C52

0.1uF

R21

200k

R36

200k

SDI SDO

R14

4.99k

C55

0.1uF

C54

0.1uF

R35

100

R12

4.99k

R15

OPT

J23

HD2X7-079-MOLEX

MOSI/SDA 7

EESDA 9

V+ 1

5V 2

CS 6

SCK/SCL 4

EEVCC 10

MISO 5

EESCL 11

EEGND 12

AUX 14

GND

GND DIR

VCC(A) VCC(B)

74LVC1T45GW

1 6

EEPROM

ARRAY

24LC025-I /ST

SDA

VCC 8

1A1

2A2

GND

SCL

Note: The buffers shown on sheet 2 of 2 of the schematic are used to protect the LTC6953 when connected to the DC2026 before the LTC6953 is powered up. There is no need for such

circuitry if the SPI bus is not active before powering up the LTC6953. The EEPROM is for identification and is not needed to program the LTC6953.

Table of contents

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