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ISLA212P25 数据表(PDF) 3 Page - Intersil Corporation

部件名 ISLA212P25
功能描述  Ultra High Performance Broadband 12 to 16-Bit Data Acquisition Platform
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制造商  INTERSIL [Intersil Corporation]
网页  http://www.intersil.com/cda/home
标志 INTERSIL - Intersil Corporation

ISLA212P25 数据表(HTML) 3 Page - Intersil Corporation

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Application Note 1837
3
AN1837.0
May 3, 2013
Software Start-Up
The FPGA clock is derived from the ADC output clock, and the
FPGA clock must be active for the software to operate correctly.
Therefore, it is critical to have a convert clock present and the
board powered up before the Konverter software is launched. It is
not necessary to have an analog input signal present.
The compressed MATLAB files are unpacked the first time the
GUI is invoked after installation. This will slow the start-up the
first time the evaluation system is used but it will run more
quickly in subsequent startups. Complete information can be
found in the KMB-001 Installer manual at:
http://www.intersil.com/converters/adc_eval_platform/
The main Konverter Analyzer window is shown in Figure 16. The
application opens in FFT mode by default, but other modes can
be selected using the radio buttons in the lower left corner. In
each mode, relevant parameters are displayed in the data box
the left side of the window.
The following data is displayed in all operating modes –
1. Fsamp: Sample clock frequency, automatically detected.
2. Ffund: Input frequency, automatically detected if input is a
single tone or dominant tone waveform
3. Fund: Amplitude of the dominant tone in dBFS
4. Samples: Record length, defaults but can be updated
Data Acquisition
Normally, the first step to an FFT data display is to open the
“Setup” key in the upper left and pick a windowing function to
limit spectral leakage. All the plots and data here used the
Blackman Harris 4 term windowing. It is also possible to change
the record length for the FFT in this screen. Normally, the
continuous calibration and background keys are selected and, if
desired, an averaging of the FFT outputs may be selected in the
lower left of the Konverter screen set up for FFT display (default
at start-up). Then, press “Run” in the lower left and the FFT will be
updating. The number of averaged sweeps defaults to 10, but
can also be changed in the “Setup” conditions dialog window.
Menu items and the toolbar buttons may not function properly if
data is being captured continuously. Press “Stop” in the lower left
before selecting a menu item or using a toolbar button.
AN1433 should be consulted for more information on the
options provided in the Konverter windows. AN1434 offers help
for first time installation if needed.
Hardware and Analog Signal Path
Description
Figure 2 shows a close-up of the ISLA214P50-55210EV1Z
daughtercard.
The SMA at the top left is the analog input connection, the next
one down is an optional sense port for an attenuated version of
the differential signal being presented to the ADC input pins,
while the lower SMA is the clock input pin. Several optional
inputs are not populated, like the amplifier disable control line at
the lower left of the card and some alternate clock input paths on
the bottom. The VTEST path SMA is not populated on the board as
delivered but may be easily added.
FIGURE 2. ISLA214P50-55210EV1Z DAUGHTERBOARD


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