User's Guide
SCAU041 – April 2010
Low-Additive, Phase-Noise LVCMOS Clock Buffer
Evaluation Board
The CDCLVC1104 is a high-performance, low-additive phase noise LVCMOS clock buffer. It has one
LVCMOS input and four LVCMOS outputs. It also has an enable pin.
This evaluation module (EVM) is designed to demonstrate the electrical performance of the
CDCLVC1104. Throughout this document, the acronym EVM and the phrases evaluation module and
evaluation board are synonymous with the CDCLVC1104EVM. Figure 1 illustrates the CDCLVC1104EVM.
For optimum performance, the board is equipped with 50-Ω SMA connectors and well-controlled 50-Ω
impedance microstrip transmission lines.
1
2
3
4
5
6
7
8
9
Contents
Features ......................................................................................................................
Signal Path and Control Circuitry .........................................................................................
Getting Started ..............................................................................................................
Power-Supply Connections ................................................................................................
Enabling/Disabling the Outputs ...........................................................................................
Output Clock .................................................................................................................
Bill of Materials ..............................................................................................................
Schematic ....................................................................................................................
Reference ....................................................................................................................
1
1
1
2
2
2
2
3
3
List of Figures
1
Schematic .................................................................................................................... 3
List of Tables
1
1
Features
•
•
•
•
2
Bill of Materials .............................................................................................................. 2
Easy-to-use evaluation board to fan out low-phase noise
Easy device setup
Enable pin configurable through jumper and SMA
Board powered at 2.5 V or 3.3 V
Signal Path and Control Circuitry
The CDCLVC1104EVM supports single-ended inputs up to 250 MHz. For more information about the
CDCLVC1104, see the CDCLVC1104 product data sheet available for download from the TI Web site
(www.ti.com).
3
Getting Started
The CDCLVC1104EVM has self-explanatory labeling and uses similar naming conventions as the
CDCLVC1104 product data sheet. In this user’s guide, all words in boldface and italic print reflect the
actual labeling on the EVM.
SCAU041 – April 2010
Low-Additive, Phase-Noise LVCMOS Clock Buffer Evaluation Board
Copyright © 2010, Texas Instruments Incorporated
1
Power-Supply Connections
4
www.ti.com
Power-Supply Connections
Connect the power-supply source to the banana plug labeled VDD (P1), and connect the ground of the
power-supply source to GND (P2). Decoupling capacitors and a ferrite bead isolate the EVM power from
the CDCLVC1104 device power pins.
The CDCLVC1104EVM can use a supply voltage 2.3 V to 3.6 V.
5
Enabling/Disabling the Outputs
The Enable pin of the CDCLVC1104 can be controlled using jumper J7 or the SMA J2. The J2 connector
is not soldered on the CDCLVC1104EVM but can be soldered if needed. Check for part ordering
information.
6
Output Clock
The CDCLVC1104 generates four LVCMOS outputs. The outputs can be loaded using the pullup and
pulldown footprints. No resistor has been soldered in those footprints.
7
Bill of Materials
Table 1. Bill of Materials
QTY
2
Value
Designator
PKG/Case
Manufacturer
Part Number
6
0.0
C1–C6
402
Panasonic - Ecg
ERJ-2GE0R00X
3
0.01 µF
C1–C13
402
Venkel
C0402X7R500-103KNE
1
0.1 µF
C10
402
Venkel
C0402X7R160-104KNE
2
47 µF
C7, C8
805
Taiyo Yuden
JMK212BJ476MG-T
1
10 µF
C9
3216-18 (EIA)
Kemet
B45196H3106K109
6
0.0
R4, R5, R8,
R11, R14, R17
402
Panasonic - Ecg
ERJ-2GE0R00X
2
100
R1, R2
402
Venkel
CR0402-16W-1000FT
1
150
R19
402
Panasonic - Ecg
ERJ-2RKF1500X
1
50
L2
1206
Murata Electronics North Am
BLM31PG500SN1L
1
LED – Green Clear
D1
1206
Cml Innovative Technologies
CMD15-21VGC/TR8
1
CDCLVC1104
U1
8-TSSOP
Texas Instruments
CDCLVC1104
1
1×3
J7
0.1 in.
HTSW-150-07-G-S
K10000013783
2
Banana Plug – Metal
P1, P2
4mm
Emerson Network Power Con
108-0740-001
5
142-0701-801
J1, J3–J6
RF SMA EDGE
Emerson Network Power Con
142-0701-801
4
4-40/0.25"
Screws
Building Fasteners
PMSSS 440 0025 PH
2029
K10000010170
4
0.75"
Standoffs
Round Threaded
10
DNI
R3, R6, R7, R9,
R10, R12, R13,
R15, R16, R18
402
DNI
1
DNI
J2
RF SMA EDGE
DNI
Low-Additive, Phase-Noise LVCMOS Clock Buffer Evaluation Board
Copyright © 2010, Texas Instruments Incorporated
SCAU041 – April 2010
Schematic
www.ti.com
8
Schematic
Figure 1. Schematic
9
Reference
1. CDCLVC11xx, 3.3 V and 2.5 V LVCMOS High-Performance Clock Buffer Family data sheet
(SCAS895)
SCAU041 – April 2010
Low-Additive, Phase-Noise LVCMOS Clock Buffer Evaluation Board
Copyright © 2010, Texas Instruments Incorporated
3
Evaluation Board/Kit Important Notice
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This evaluation board/kit is intended for use for ENGINEERING DEVELOPMENT, DEMONSTRATION, OR EVALUATION
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EVM Warnings and Restrictions
It is important to operate this EVM within the input voltage range of 2.3 V to 3.6 V and the output voltage range of -0.5 V to 3.6 V .
Exceeding the specified input range may cause unexpected operation and/or irreversible damage to the EVM. If there are
questions concerning the input range, please contact a TI field representative prior to connecting the input power.
Applying loads outside of the specified output range may result in unintended operation and/or possible permanent damage to the
EVM. Please consult the EVM User's Guide prior to connecting any load to the EVM output. If there is uncertainty as to the load
specification, please contact a TI field representative.
During normal operation, some circuit components may have case temperatures greater than 85° C. The EVM is designed to
operate properly with certain components above 125° C as long as the input and output ranges are maintained. These components
include but are not limited to linear regulators, switching transistors, pass transistors, and current sense resistors. These types of
devices can be identified using the EVM schematic located in the EVM User's Guide. When placing measurement probes near
these devices during operation, please be aware that these devices may be very warm to the touch.
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