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MAX5868EVKIT Datasheet(PDF) 24 Page - Maxim Integrated Products

Part No. MAX5868EVKIT
Description  Evaluates the MAX5868 RF DAC Performance, Evaluates the MAX5868 RF DAC Performance,
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Maker  MAXIM [Maxim Integrated Products]
Homepage  http://www.maxim-ic.com

MAX5868EVKIT Datasheet(HTML) 24 Page - Maxim Integrated Products

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Maxim Integrated │ 24
Evaluates: MAX5868
MAX5868 Evaluation Kit
VC707 FPGA Programming
FPGA Programming block allows the user to
interact with the Xilinx FPGA at a basic, bit-file level. As
already discussed in the Configure the MAX5868EVKIT
Graphical User Interface section, the VC707 is
initially programed through this interface. The FPGA fabric
provided with this evaluation system configures the
FPGA to control and communicate with the MAX5868.
The Virtex-7 FPGA also acts as a data source system,
loading pattern data into memory and transferring that
data across the high-speed LVDS interface to the DAC.
VC707 Pattern Control
Pattern Control block allows the user to load
different patterns by first opening a Pattern List file.
The software utilizes these list files for loading test
patterns into the VC707 memory, such as the exam-
TestLoadPatterns.txt located in the MAX5868\
PatternFiles folder. The list file simply contains an unor-
dered list of names of test pattern files, including exten-
sions. The format is simple ASCII text with one pattern file
name on each line. Any line within the list that contains
a ‘#’ character will cause it to be skipped when the list is
loaded by the GUI. The list can contain multiple patterns
with up to 1MB in total pattern length, but only one pattern
list can be loaded at a time; loading a new list will cause
the previously loaded patterns to be overwritten. The
MAX5868 EV kit software includes two pattern list files:
TestLoadPatterns.txt and test QAM_PatList.txt.
Pattern files contain the raw waveform data used by the
RF DAC to generate an analog RF output. A collection
of example patterns used to drive the MAX5868 RF DAC
have been provided with the MAX5868 EV kit software.
The user may have different types of patterns they wish
to test with the evaluation system. To generate other
pattern files, it is recommended the user have access to
MathWorks MATLAB software.
For additional information on the Pattern File format used
with the VC707 FPGA and the MAX5868 software, please
refer to Appendix III.
VC707 MicroBlaze Interface
The MicroBlaze Control block provides the user with a
means to control and communicate with both the VC707
system and the MAX5868 using the pass-through SPI
interface. The user is able to type commands into the
text box, and can directly execute those commands by
clicking on the <Write/Read> button. Any results that are
returned such as values or simply an
ACK# response will
be displayed in the text box. The “LED” indicator to the
right of the block will be green when an
ACK# response
is received and will turn red, when a
NAK# response is
Test Setups
The GUI provides two convenient example setups, with
test patterns, to allow the user to easily verify operation of
the evaluation system. The two test setups configure the
system as follows:
● fDAC:
● Interpolation Rate:
8x (614.4MHz Data interface)
● Bus Mode:
Each setting has a unique pattern and NCO frequency
associated with them, these are also loaded and config-
ured based on the setup selected.
Note: Indicate that you are using the MAX5868 when contacting
these component suppliers.
Fairchild Semiconductor
Hong Kong X’tals Ltd.
Murata Electronics North
America, Inc.
Panasonic Corp.
Taiyo Yuden
TDK Corp.
Component Suppliers

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