DC1216A - Demo Manual

DEMO MANUAL DC1216
High Speed ADC
Clock Source
Description
Demonstration circuit 1216 is a low jitter, low noise clock
source for demonstrating high speed ADCs. Each assembly 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.
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
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.
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.
dc1216f
1
DEMO MANUAL DC1216
Quick Start Procedure
SETUP
The DC1216 requires an external voltage of 5V. This voltage 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.
5V TO 9V
OUTPUT FREQUENCY
DEPENDENT ON CRYSTAL FREQUENCY
CONNECT SMA DIRECTLY TO HIGH
SPEED ADC DEMO BOARD
dc1216f
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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
MILL-MAX, 2501-2-00-80-00-00-07-0
6
2
E3, E5
TESTPOINT, TURRET, 0.094"
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
dc1216f
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DEMO MANUAL DC1216
Parts List
DEMO BOARD 1216-A
ITEM
QTY
1
1
REFERENCE
PART DESCRIPTION
MANUFACTURER/PART NUMBER
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-B
ITEM
QTY
1
1
REFERENCE
PART DESCRIPTION
MANUFACTURER/PART NUMBER
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
REFERENCE
PART DESCRIPTION
MANUFACTURER/PART NUMBER
DC1216A
DC1216A GENERAL BOM
GENERAL BOM
DEMO BOARD 1216-C
ITEM
QTY
1
1
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
REFERENCE
PART DESCRIPTION
MANUFACTURER/PART NUMBER
DC1216A
DC1216A GENERAL BOM
GENERAL BOM
DEMO BOARD 1216-D
ITEM
QTY
1
1
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
dc1216f
4
E3
GND
3
2
1
E5
B03B-PASK
J2
AUX PWR
VIN
5V
SHDN
C2
1uF
E4
(opt.)
R6
1K
SHDN
IN
BYP
OUT
GND
VREF
R3
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 representation that the interconnection of its circuits as described herein will not infringe on existing patent rights.
Crystek, 602019
Crystek, 601964
DC1216A-C
DC1216A-D
B1
+ C1
100uF
10V
BEAD 47ohm


DATE
1/17/07
1/17/07
Wednesday, October 03, 2012
APPROVED

APPROVALS

 DRAWN
June Wu

ENGINEER

Clarence Mayott

CHECKED


4.7uF
OPT
5 ohms
100 ohms
OPT
OPT
5 ohms
C3
R2
4.99K
R1
4.99K
5 ohms
R4
C5
0.01uF
A1
CONTRACT NO.
100MHz, PLL Reference
80MHz
122.88MHz
100MHz
Freq. (MHz)
CLKOUT
*
C3

Crystek, 601964
Crystek, 602017
C4
0.1uF
opt.
DC1216A-A
Y1
4
5
E2
(opt.)
E1
(opt.)
DC1216A-B
ASSEMBLY TYPE
* VERSION TABLE
3
1
U1
LT1761ES5-3.3
GND
2
ECO REV
Y1
*
0.01uF
C6
*
R4
TECHNOLOGY
3
1
R5
opt.
FILENAME:
DWG NO
J1
DATE
SHEET
DC1216A
1
OF
CLKOUT
10-03-12
1630 McCarthy Blvd.
Milpitas, CA 95035
Phone: (408)432-1900
Fax: (408)434-0507
MICHEL A.
High Speed ADC Clock Source
OUT
Volt Cont.
CAGE CODE
GND
Vdd
SCALE:
SIZE
TITLE
2
4
ADD "-D" VERSION
REVISION HISTORY
APPROVED
DESCRIPTION
1
A1
REV
*
DEMO MANUAL DC1216
Schematic Diagram
dc1216f
5
DEMO MANUAL DC1216
DEMONSTRATION BOARD IMPORTANT NOTICE
Linear Technology Corporation (LTC) 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 LTC 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 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 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. LTC assumes no liability for applications assistance,
customer product design, software performance, or infringement of patents or any other intellectual property rights of any kind.
LTC 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 LTC application engineer.
Mailing Address:
Linear Technology
1630 McCarthy Blvd.
Milpitas, CA 95035
Copyright © 2004, Linear Technology Corporation
dc1216f
6
Linear Technology Corporation
LT 0313 • PRINTED IN USA
1630 McCarthy Blvd., Milpitas, CA 95035-7417
(408) 432-1900
●
FAX: (408) 434-0507 ● www.linear.com
 LINEAR TECHNOLOGY CORPORATION 2013
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