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Linear Technology DC1705C, Demo Manual

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Linear Technology DC1705C Demo Manual Download Page 11

11

dc1705cfb

DEMO MANUAL DC1705C

SCHEMATIC DIAGRAM

Note:

 The buffers shown on sheet 2 of 2 of the schematic are used to protect the LTC6946 when communicating to it starts before powering it up. There is no 

need for such circuitry if the SPI bus is not active before powering up the LTC6946. The EEPROM is for identification and is not needed to program the LTC6946.

5

5

4

4

3

3

2

2

1

1

D

D

C

C

B

B

A

A

0603

NOTE: EEPROM FOR BOARD IDENTIFICATION

DC590 SPI INTERFACE

3.3V

3.3V

3.3V

3.3V

CS

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

1

DEMO CIRCUIT 1705C

Thursday, October 02, 2014

22

ULTRALOW NOISE & SPURIOUS INTEGER-N

N/A

LTC6946IUFD FAMILY

KIM T.

CHRIS P.

SYNTHESIZER WITH INTEGRATED VCO

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

1

DEMO CIRCUIT 1705C

Thursday, October 02, 2014

22

ULTRALOW NOISE & SPURIOUS INTEGER-N

N/A

LTC6946IUFD FAMILY

KIM T.

CHRIS P.

SYNTHESIZER WITH INTEGRATED VCO

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

1

DEMO CIRCUIT 1705C

Thursday, October 02, 2014

22

ULTRALOW NOISE & SPURIOUS INTEGER-N

N/A

LTC6946IUFD FAMILY

KIM T.

CHRIS P.

SYNTHESIZER WITH INTEGRATED VCO

R11

100

R11

100

C23

0.1uF

C23

0.1uF

CSCS

C3 0.1uF

C3 0.1uF

R12 100

R12 100

R10

100

R10

100

V+DIGV+DIG

R7 200K

R7 200K

SDOSDO

J2

HD2X7-079-MOLEX

J2

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

3

GND

13

GND

8

R6 200K

R6 200K

R15 0

R15 0

EEPROM

ARR

AY

U5

24LC025-I /ST

EEPROM

ARR

AY

U5

24LC025-I /ST

SDA

5

VCC

8

A0

1

A1

2

A2

3

GND

4

WP

7

SCL

6

R5 200K

R5 200K

C24 0.1uF

C24 0.1uF

WPWP

R13 200K

R13 200K

EEGNDEEGND

GND

DIR

VCC(A)

VCC(B)

U4 74LVC1T45GW

GND

DIR

VCC(A)

VCC(B)

U4 74LVC1T45GW

1

6

4

3

5

2

R8 4.99K

R8 4.99K

SDISDI

C25 0.1uF

C25 0.1uF

R16 100

R16 100

GND

VCC

U3 NC7WZ17P6X

GND

VCC

U3 NC7WZ17P6X

1

6

4

3

5

2

R9 4.99K

R9 4.99K

C26 0.1uF

C26 0.1uF

R14 4.99K

R14 4.99K

SCLKSCLK

GND

VCC

U2 NC7WZ17P6X

GND

VCC

U2 NC7WZ17P6X

1

6

4

3

5

2

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Summary of Contents for DC1705C

Page 1: ...ions Each DC1705C provides 50Ω SMA connectors for the reference frequency input fREF REF IN the reference output buffer REF OUT and the differential RF output RF and RF A DC590 USB serial controller board is usedforSPIcommunicationwiththeLTC6946 controlled by the supplied PLLWizard software Design files for this circuit board are available at http www linear com demo DC1705C L LT LTC LTM Linear Te...

Page 2: ...ch as the Wenzel 501 04608A or 501 04516D OCXO is recommended If using a different frequency make sure to update the fREF and R_DIV boxes under the System tab in PLLWizard so that fPFD is still 1MHz For example if a 20MHz clock is used fREF should be changed to 20MHz and R_DIV to 20 REF BST and FILT under the System tab in PLLWizard might need to be changed if the reference frequency and or power ...

Page 3: ...ntheDC590beforerunningtheinstallation program 2 Download the QuikEval installation program from http www linear com software 3 Run the QuikEval installation program and follow the on screeninstructions Moredetailedinstallationinfor mation may be found in the DC590 s Quick Start guide 4 Exit the QuikEval program once the installation is com plete as it is not needed to run the PLLWizard software 5 ...

Page 4: ...dows 7 Microsoft NET 2 0 or later Windows Installer 3 1 or later Linear Technology s QuikEval and DC590 hardware Microsoft NET You must have Microsoft NET 2 0 or later installed on yourcomputer PLLWizardwillnotrunwithoutit Notethat with Windows Vista and Windows 7 you should have at least version 3 5 pre installed To manually determine your version of NET using Win dows XP click Start Menu Setting...

Page 5: ...Downloaded from Microsoft PLLWizardSetup_net20 exe 2 0 SP2 Included Much Larger File Size Choose PLLWizardSetup if you have NET 2 0 or later have Windows Vista or Windows 7 or if you have less than NET 2 0 but want the latest NET installed Choose PLLWizardSetup_net20 if you have less than NET 2 0 and want faster installation no additional Microsoft downloads are needed but the file size is much la...

Page 6: ...Wizard Set Files The red LED on DC1705C should turn on indicating that the loop is locked at 900MHz You can then change the values of N_DIV and or O_DIV in PLLWizard to change the output frequency Troubleshooting If the red LED does not illuminate follow the instructions below 1 Verify that you are able to communicate with the DC1705C The bottom status line in PLLWizard should read LTC6946 and Com...

Page 7: ...4 DC1705C Components and Connections QUICK START PROCEDURE Downloaded from Arrow com Downloaded from Arrow com Downloaded from Arrow com Downloaded from Arrow com Downloaded from Arrow com Downloaded from Arrow com Downloaded from Arrow com ...

Page 8: ...W 1 0402 NIC NRC04F51R1TRF 17 1 R3 RES CHIP 330Ω 1 16W 1 0402 NIC NRC04F3300TRF 18 1 R4 RES CHIP 15Ω 1 16W 1 0402 NIC NRC04F15R0TRF 19 4 R5 R6 R7 R13 RES CHIP 200k 1 16W 1 0402 NIC NRC04F2003TRF 20 3 R8 R9 R14 RES CHIP 4 99k 1 16W 1 0402 NIC NRC04F4991TRF 21 4 R10 R11 R12 R16 RES CHIP 100Ω 1 16W 5 0402 NIC NRC04J101TRF 22 1 R15 RES CHIP 0Ω 0603 VISHAY CRCW06030000Z0EA 23 2 U2 U3 I C DUAL BUFFER SC...

Page 9: ...H682JA01D 4 1 CP CAP COG 2700pF 50V 5 0603 MURATA GRM1885C1H272JA01D 5 1 RZ RES CHIP 453Ω 1 10W 1 0603 NIC NRC06F4530TRF 6 1 U1 I C SYNTHESIZER QFN28UFD 4X5 LINEAR TECH LTC6946IUFD 3 DC1705C D 1 1 GENERAL BOM 2 1 CI1 CAP X7R 0 01µF 50V 5 0603 AVX 06035C103JAT2A 3 1 CI2 CAP COG 0 01μF 50V 5 0805 MURATA GRM2195C1H103JA01 4 1 CP CAP COG 1500pF 50V 5 0603 MURATA GRM1885C1H152JA01D 5 1 RZ RES CHIP 536Ω...

Page 10: ...ED FOR USE WITH LINEAR TECHNOLOGY PARTS SCALE NONE www linear com 1 DEMO CIRCUIT 1705C Thursday October 02 2014 1 2 ULTRALOW NOISE SPURIOUS INTEGER N N A LTC6946IUFD FAMILY KIM T CHRIS P SYNTHESIZER WITH INTEGRATED VCO 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 On...

Page 11: ...EAR TECHNOLOGY AND SCHEMATIC SUPPLIED FOR USE WITH LINEAR TECHNOLOGY PARTS SCALE NONE www linear com 1 DEMO CIRCUIT 1705C Thursday October 02 2014 2 2 ULTRALOW NOISE SPURIOUS INTEGER N N A LTC6946IUFD FAMILY KIM T CHRIS P SYNTHESIZER WITH INTEGRATED VCO 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 L...

Page 12: ...r the LTC6946 Downloaded from Arrow com Downloaded from Arrow com Downloaded from Arrow com Downloaded from Arrow com Downloaded from Arrow com Downloaded from Arrow com Downloaded from Arrow com Downloaded from Arrow com Downloaded from Arrow com Downloaded from Arrow com Downloaded from Arrow com Downloaded from Arrow com ...

Page 13: ...EVISION HISTORY BOARD REV DATE DESCRIPTION Original Design B 03 12 Added EEPROM for identification purposes C 05 13 Added support for 5V SPI in addition to the default 3 3V 11 14 Added DC1705C D version Downloaded from Arrow com Downloaded from Arrow com Downloaded from Arrow com Downloaded from Arrow com Downloaded from Arrow com Downloaded from Arrow com Downloaded from Arrow com Downloaded from...

Page 14: ...CIAL INCIDENTAL OR CONSEQUENTIAL DAMAGES The user assumes all responsibility and liability for proper and safe handling of the goods Further the user releases LTC from all claims arising from the handling or use of the goods Due to the open construction of the product it is the user s responsibility to take any and all appropriate precautions with regard to electrostatic discharge Also be aware th...

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