Linear Technology DC1216A-A Guida rapida alla configurazione

dc1216f

DEMO MANUAL DC1216

Description

High Speed ADC

Clock Source

Demonstration circuit 1216 is a low jitter, low noise clock

source for demonstrating high speed ADCs. Each assem-

bly includes a LDO regulator and a high precision VCXO.

Functionally, this circuit uses a linear regulator to provide

a clean 5V to a VCXO at a fixed frequency. This VCXO is

capable of providing a signal which is clean enough to

produce data sheet performance from high speed ADCs.

It is designed to have 50Ω output impedance, but has

provision for other termination resistors if needed.

Table 1. DC1216A Variants

DC1216A VARIANTS VCXO PART NUMBER OUTPUT FREQUENCY

DC1216A-A Crystek 601964 100MHz

DC1216A-B Crystek 602017 122.88MHz

DC1216A-C Crystek 602019 80MHz

DC1216A-D Crystek 601964 100MHz

Note: DC1216A-A, DC1216A-B and DC1216A-C are optimized to be used

with the data converter demo boards. The DC1216A-D is optimized to

drive the synthesizer demo boards.

L, LT, LTC, LTM, Linear Technology and the Linear logo are registered trademarks of Linear

Technology Corporation. All other trademarks are the property of their respective owners.

This circuit also is a model for the clock source of ADCs.

It shows how to properly implement a VCXO correctly to

drive the clock of an ADC. It can be used with a DC1075

to produce lower clock frequencies.

Design files for this circuit board are available at

http://www.linear.com/demo

Downloaded from Arrow.com.

dc1216f

DEMO MANUAL DC1216

Quick start proceDure

SETUP

The DC1216 requires an external voltage of 5V. This volt-

age can be as high as 9V. The SMA connector should be

connected to the ADC directly, or through a clock divider

circuit such as the DC1075A. No external filter is required.

CONNECT SMA DIRECTLY TO HIGH

SPEED ADC DEMO BOARD

OUTPUT FREQUENCY

DEPENDENT ON CRYSTAL FREQUENCY

5V TO 9V

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dc1216f

DEMO MANUAL DC1216

parts List

DEMO BOARD 1216A

ITEM QTY REFERENCE PART DESCRIPTION MANUFACTURER/PART NUMBER

1 1 B1 BEAD, 47Ω IMPEDANCE 0603 MURATA, BLM18BB470SN1D

2 1 C1 CAP, TANT, 100µF, 10V, 20% 6032 AVX, TPSC107M010R0200

3 1 C2 CAP, X5R, 1µF, 10V, 10% 0603 AVX, 0603ZD105KAT2A

4 1 C4 CAP, X7R, 0.1µF, 25V, 10% 0603 AVX, 06033C104KAT2A

5 2 C6, C5 CAP, X7R, 0.01µF, 50V, 10% 0603 AVX, 06035C103KAT2A

6 2 E3, E5 TESTPOINT, TURRET, 0.094" MILL-MAX, 2501-2-00-80-00-00-07-0

7 0 E1, E2, E4 (OPT) TESTPOINT, TURRET, 0.094"

8 1 J1 CON, SMA-EDGE, 50Ω, PLUG AMPHENOL, 901-9895-RFX

9 1 J2 AUX POWER CONNECTOR, B03B-PASK JST, B03B-PASK (LF)(SN)

10 2 R1, R2 RES, CHIP, 4.99k, 1/10W, 1% 0603 VISHAY, CRCW06034K99FKEA

11 0 R3, R5 (OPT) RES, 0603

12 1 R6 RES, CHIP, 1k, 1/10W, 5% 0603 VISHAY, CRCW06031K00JNEA

13 1 U1 IC LT1761ES5-3.3, SOT23-S5 LINEAR TECHNOLOGY, LT1761ES5-3.3#PBF

14 4 (STAND-OFF) STAND-OFF, NYLON 0.25" KEYSTONE, 8831(SNAP ON)

15 1 STENCIL STENCIL 1216A

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dc1216f

DEMO MANUAL DC1216

parts List

DEMO BOARD 1216-A

ITEM QTY REFERENCE PART DESCRIPTION MANUFACTURER/PART NUMBER

1 1 DC1216A DC1216A GENERAL BOM GENERAL BOM

2 1 Y1 CRYSTAL 601964 CRYSTEK, 601964

3 1 R4 RES, CHIP, 5.1Ω, 1/10W, 5% 0603 VISHAY, CRCW06035R10JNEA

4 0 C3 OPT

5 1 FAB, PRINTED CIRCUIT BOARD DEMO CIRCUIT 1216A

DEMO BOARD 1216-C

ITEM QTY REFERENCE PART DESCRIPTION MANUFACTURER/PART NUMBER

1 1 DC1216A DC1216A GENERAL BOM GENERAL BOM

2 1 Y1 CRYSTAL, 602019 CRYSTEK, 602019

3 1 R4 RES, CHIP, 5.1Ω, 1/10W, 5% 0603 VISHAY, CRCW06035R10JNEA

4 0 C3 OPT

5 1 FAB, PRINTED CIRCUIT BOARD DEMO CIRCUIT 1216A

DEMO BOARD 1216-D

ITEM QTY REFERENCE PART DESCRIPTION MANUFACTURER/PART NUMBER

1 1 DC1216A DC1216A GENERAL BOM GENERAL BOM

2 1 C3 CAP, X5R, 4.7µF, 10V, 10% 0603 TDK, C1608X5R1A475K

3 1 R4 RES, CHIP, 100Ω, 1/10W, 5% 0603 VISHAY, CRCW0603100RJNEA

4 1 Y1 CRYSTAL, 601964 CRYSTEK, 601964

5 1 FAB, PRINTED CIRCUIT BOARD DEMO CIRCUIT 1216A

DEMO BOARD 1216-B

ITEM QTY REFERENCE PART DESCRIPTION MANUFACTURER/PART NUMBER

1 1 DC1216A DC1216A GENERAL BOM GENERAL BOM

2 1 Y1 CRYSTAL 602017 CRYSTEK, 602017

3 1 R4 RES, CHIP, 5.1Ω, 1/10W, 5% 0603 VISHAY, CRCW06035R10JNEA

4 0 C3 OPT

5 1 FAB, PRINTED CIRCUIT BOARD DEMO CIRCUIT 1216A

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dc1216f

DEMO MANUAL DC1216

Information furnished by Linear Technology Corporation is believed to be accurate and reliable.

However, no responsibility is assumed for its use. Linear Technology Corporation makes no representa-

tion that the interconnection of its circuits as described herein will not infringe on existing patent rights.

schematic Diagram

VREF

GND

CLKOUT

GND

SHDN

VIN

(opt.)

DC1216A-A

ASSEMBLY TYPE Y1

Crystek, 601964

Freq. (MHz)

AUX PWR

100MHz

VERSION TABLE

CLKOUT

122.88MHzDC1216A-B Crystek, 602017

80MHzDC1216A-C Crystek, 602019

100MHz, PLL Reference

R4 C3

5 ohms

OPT

Crystek, 601964

DC1216A-D 100 ohms 4.7uF

SIZE

SCALE:

CAGE CODE

DWG NO

REV

SHEET OF

FILENAME:

TITLE

CONTRACT NO.

APPROVALS

DATE

DRAWN

CHECKED

APPROVED

ENGINEER

TECHNOLOGY

1630 McCarthy Blvd.

Milpitas, CA 95035

Phone: (408)432-1900

Fax: (408)434-0507



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

DC1216A

Wednesday, October 03, 2012

June Wu 1/17/07

Clarence Mayott 1/17/07

High Speed ADC Clock Source

SIZE

SCALE:

CAGE CODE

DWG NO

REV

SHEET OF

FILENAME:

TITLE

CONTRACT NO.

APPROVALS

DATE

DRAWN

CHECKED

APPROVED

ENGINEER

TECHNOLOGY

1630 McCarthy Blvd.

Milpitas, CA 95035

Phone: (408)432-1900

Fax: (408)434-0507



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

DC1216A

Wednesday, October 03, 2012

June Wu 1/17/07

Clarence Mayott 1/17/07

High Speed ADC Clock Source

SIZE

SCALE:

CAGE CODE

DWG NO

REV

SHEET OF

FILENAME:

TITLE

CONTRACT NO.

APPROVALS

DATE

DRAWN

CHECKED

APPROVED

ENGINEER

TECHNOLOGY

1630 McCarthy Blvd.

Milpitas, CA 95035

Phone: (408)432-1900

Fax: (408)434-0507



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

DC1216A

Wednesday, October 03, 2012

June Wu 1/17/07

Clarence Mayott 1/17/07

High Speed ADC Clock Source

REVISION HISTORY

DESCRIPTION DATE

APPROVED

ECO REV

MICHEL A.ADD "-D" VERSIONA1 10-03-12

REVISION HISTORY

DESCRIPTION DATE

APPROVED

ECO REV

MICHEL A.ADD "-D" VERSIONA1 10-03-12

REVISION HISTORY

DESCRIPTION DATE

APPROVED

ECO REV

MICHEL A.ADD "-D" VERSIONA1 10-03-12

E4E4

1uF

4.99K

Y1Y1

Volt Cont. 1

Vdd

OUT 3

GND

J1J1

E1E1

LT1761ES5-3.3

SHDN

GND

BYP 4

OUT 5

4.99K

BEAD 47ohm

BEAD 47ohm R4

0.01uF

E3E3

E2E2

opt.

0.1uF

E5E5

+C1

100uF

10V

+C1

100uF

10V

B03B-PASK

0.01uF

opt.

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dc1216f

DEMO MANUAL DC1216

Linear Technology Corporation

1630 McCarthy Blvd., Milpitas, CA 95035-7417

(408) 432-1900 ●FAX: (408) 434-0507 ●www.linear.com

 LINEAR TECHNOLOGY CORPORATION 2013

LT 0313 • PRINTED IN USA

DEMONSTRATION BOARD IMPORTANT NOTICE

Linear Technology Corporation (LT C ) provides the enclosed product(s) under the following AS IS conditions:

This demonstration board (DEMO BOARD) kit being sold or provided by Linear Technology is intended for use for ENGINEERING DEVELOPMENT

OR EVALUATION PURPOSES ONLY and is not provided by LT C for commercial use. As such, the DEMO BOARD herein may not be complete

in terms of required design-, marketing-, and/or manufacturing-related protective considerations, including but not limited to product safety

measures typically found in finished commercial goods. As a prototype, this product does not fall within the scope of the European Union

directive on electromagnetic compatibility and therefore may or may not meet the technical requirements of the directive, or other regulations.

If this evaluation kit does not meet the specifications recited in the DEMO BOARD manual the kit may be returned within 30 days from the date

of delivery for a full refund. THE FOREGOING WARRANTY IS THE EXCLUSIVE WARRANTY MADE BY THE SELLER TO BUYER AND IS IN LIEU

OF ALL OTHER WARRANTIES, EXPRESSED, IMPLIED, OR STATUTORY, INCLUDING ANY WARRANTY OF MERCHANTABILITY OR FITNESS

FOR ANY PARTICULAR PURPOSE. EXCEPT TO THE EXTENT OF THIS INDEMNITY, NEITHER PARTY SHALL BE LIABLE TO THE OTHER FOR

ANY INDIRECT, SPECIAL, INCIDENTAL, OR CONSEQUENTIAL DAMAGES.

The user assumes all responsibility and liability for proper and safe handling of the goods. Further, the user releases LT C 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 that the products herein may not be regulatory compliant or

agency certified (FCC, UL, CE, etc.).

No License is granted under any patent right or other intellectual property whatsoever. LT C assumes no liability for applications assistance,

customer product design, software performance, or infringement of patents or any other intellectual property rights of any kind.

LT C currently services a variety of customers for products around the world, and therefore this transaction is not exclusive.

Please read the DEMO BOARD manual prior to handling the product. Persons handling this product must have electronics training and

observe good laboratory practice standards. Common sense is encouraged.

This notice contains important safety information about temperatures and voltages. For further safety concerns, please contact a LT C applica-

tion engineer.

Mailing Address:

Linear Technology

1630 McCarthy Blvd.

Milpitas, CA 95035

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