ANALOG DEVICES UG-035 Service Manual
Evaluation Board User Guide
One Technology Way • P. O . Box 9106 • Norwood, MA 02062-9106, U.S.A. • Tel : 781.329.4700 • Fax : 781.461.3113 • www.analog.com
UG-035
Evaluating the AD9552 Oscillator Frequency Upconverter
FEATURES
Simple power connection using USB connection and
on-board LDO voltage regulators
LDOs are easily bypassed for power measurements
AC-coupled differential LVPECL SMA connectors
SMA connectors for
1 reference input
1 PLL lock detect output
Microsoft Windows®–based evaluation software
with simple graphical user interface
On-board PLL loop filter
Easy access to digital I/O and diagnostic signals
via I/O header
Status LEDs for diagnostic signals
USB computer interface
Dip switch configurable for manual operation
Software calculator provides flexibility, allowing programming
almost any rational input/output frequency ratio
GENERAL DESCRIPTION
This user guide describes the hardware and software of the
AD9552 evaluation board and includes detailed schematics and
PCB layout artwork. The AD9552 evaluation board is a
compact, easy to use platform for evaluating all features of the
AD9552 oscillator frequency upconverter.
The AD9552 is a fractional-N phase-locked loop (PLL) based
clock generator designed specifically to replace high frequency
crystal oscillators and resonators. The device employs a sigmadelta (Σ-Δ) modulator (SDM) to accommodate fractional frequency synthesis. The user supplies an input reference signal by
connecting a single-ended clock signal directly to the REF pin
or by connecting a crystal resonator across the XTAL pins.
The AD9552 is pin programmable, providing one of 64 standard
output frequencies based on one of eight standard input frequencies. The device also has a 3-wire SPI interface, enabling the user
to program custom input-to-output frequency ratios.
The AD9552 relies on an external capacitor to complete the loop
filter of the PLL. The output is compatible with LVPECL, LVDS,
or single-ended CMOS logic levels, although the AD9552 is
implemented in a strictly CMOS process.
DIGITAL PICTURE OF THE EVALUATION BOARD
Figure 1.
AD9552 Evaluation Board
See the last page for an important warning and disclaimers. Rev. 0 | Page 1 of 12
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UG-035 Evaluation Board User Guide
TABLE OF CONTENTS
Features .............................................................................................. 1
General Description ......................................................................... 1
Digital Picture of the Evaluation Board ......................................... 1
Revision History ............................................................................... 2
Evaluation Board Hardware ............................................................ 3
Setting Up the Power and PC Connections .............................. 3
Setting Up the Signal Connections ............................................ 3
Bypassing the USB Power Supply ............................................... 3
Evaluation Board Software .............................................................. 4
Installing the Software ................................................................. 4
Using the Software ........................................................................ 4
Guide to Programming the AD9552 .............................................. 5
REVISION HISTORY
1/10—Revision 0: Initial Version
Using an SPI Port ..........................................................................5
Using Dip Switches (Manual Control) .......................................5
Using Software to Override Dip Switches (Software Control)5
Software Operation ...........................................................................6
Menu Bar of Main Window .........................................................7
Button Bar of Main Window .......................................................8
Using Software to Control the Functional Blocks of the
AD9552 ...........................................................................................8
Using Software to Calculate the Device Settings ................... 10
Routing 26 MHz to Test Port .................................................... 10
ESD Caution................................................................................ 12
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Evaluation Board User Guide UG-035
EVALUATION BOARD HARDWARE
The following instructions are for setting up the physical
connections to the AD9552 evaluation board.
SETTING UP THE POWER AND PC CONNECTIONS
Set up the power and PC connections as follows:
1. Install the AD9552 evaluation software before connecting
the evaluation board to your PC for the first time (see the
Installing the Software section). Administrative privileges
are required for installation.
The AD9552 has the option of either being pin or register
programmable. If the pin-programmable option is desired,
then no software is needed to control the part. However, it
is recommended to install the software because if it is not
installed, the computer recognizes the evaluation board as
new hardware and attempts to install drivers.
2. Connect the USB cables to the evaluation board and the
computer.
The red LED labeled VBUS (CR5) on the AD9552 evaluation
board should illuminate, and the USB STATUS LED should
start blinking. If the USB STATUS LED is not blinking,
ensure that the USB port on the PC is operational and that
the USB cable is not damaged.
3. If the Found New Hardware Wizard automatically
appears when the evaluation board is connected, select
Install the software automatically and then click Next.
The Found New Hardware Wizard may appear twice, and
a system restart may be required.
Refer to the Evaluation Board Software section for details on
running the AD9552 evaluation board software.
SETTING UP THE SIGNAL CONNECTIONS
After setting up the power and PC connections, use the
following procedure to set up the signal connections:
1. Connect an oscilloscope, spectrum analyzer, or other lab
equipment to any of the J3 to J6 SMA connectors on the
upper right side of the board. The output connectors are
single ended. A 50 Ω termination should be placed on all
enabled unused outputs.
BYPASSING THE USB POWER SUPPLY
The evaluation board can be configured to supply power to the
AD9552 from an external power supply. Bypass the USB power
supply as follows:
1. Remove the F2 ferrite bead (located on the backside of
the board).
2. Connect a bench power supply to Pin 3.3V_1 INPUT of
TB1 on the evaluation board. In addition, resistors on the
evaluation board can be removed to further separate power
supply connections to the AD9552. This is useful for
measuring the AD9552 power consumption. Refer to the
evaluation board schematics provided on the CD in the
evaluation board kit (also available at www.analog.com) for
further details.
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UG-035 Evaluation Board User Guide
EVALUATION BOARD SOFTWARE
The instructions included in this section are for setting up the
AD9552 evaluation board software.
INSTALLING THE SOFTWARE
Do not connect the evaluation board until the software
installation is complete. To install the software,
1. Insert the AD9552 evaluation software CD-ROM into a PC
CD disc drive.
2. Click My Computer, and then double-click the
AD9552EV CD icon.
A window opens showing the contents of the CD divided
into four sections: data sheet, layout, schematic, and software.
The readme.txt file contains a description of the CDROM contents, as well as any last minute instructions or
information.
3. Double-click the Software folder, and then double-click
AD9552Eval_Setup1.1.0.exe. Follow the installation
instructions. The default location for the evaluation
software is C:\Program Files\Analog Devices\AD9552
Eval Software\.
4. If there are any updates to the evaluation software on a
supplemental CD or in the \Software\Updates folder, be
sure to copy the new .exe file, as well as any setup files, to
the default location.
A hardware installation window appears. Depending on
whether the evaluation board is found by the software, the
text in this window is either light blue, indicating that the
evaluation board is found, or red, indicating that the
evaluation board cannot be found.
3. If the evaluation board is found, click in the window when
the Evaluation Software Ready message appears.
The main window of the evaluation board software appears.
Proceed to the Guide to Programming the AD9552 section
for more details about using the software.
4. If the evaluation board is not found, a dialog box appears
that allows you to select an evaluation board to use while
the software runs in standalone mode. Standalone mode is
useful for viewing and generating register setup files.
5. If the evaluation board is not automatically detected when
it is connected, choose Select Evaluation Board from the
I/O menu, and then select Ezssp-0, Ezssp-1, or Ezssp-2 (see
Figure 2).
USING THE SOFTWARE
After the evaluation software has been installed, you can run
the software as follows:
1. Power up and connect the evaluation board to the PC.
2. Double-click AD9552 Eval Software to run the AD9552
evaluation software.
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Figure 2. Select USB Device Window
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