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Application Note 9853
times vary with the clock rate to output frequency ratio. A
general rule is that the lower the F CLK /F OUT ratio is, the
higher the setup time should be to achieve optimum spectral
behavior.
Getting Started
A summary of the external supplies, equipment, and signal
sources needed to operate the board is given below:
1. +5V to +3V supply for HI5x60 DAC.
2. Pattern Generator.
3. Square wave clock source (usually part of the Pattern
Generator).
4. Spectrum Analyzer or Oscilloscope for viewing the output
of the converter.
HP-SMA TEST BOARD
( INTERSIL MADE)
Attach the evaluation board to the power supply(s). Connect
the bits from the data generator to the evaluation board,
preferably by using a male, 64 or 96-pin VME (Versa Module
Eurocard) connector that mates with the evaluation board.
Connect the clock source to the evaluation board, also
preferably through the VME connector. Failure to make clean
and short connections to the data input lines and clock
source will result in a decrease in spectral performance.
Using a coaxial cable with the proper SMA connector, attach
the output of the converter, I OUT , to the measurement
equipment that will be evaluating the converter’s
performance. Make sure that the jumpers are in their proper
placement. Consult the ‘Voltage Reference’ section and the
‘Sleep’ section of this document for a de?nition of the
jumpers’ functionality.
HI5X60 EVALUATION BOARD
14 BITS
16 BITS AVAILABLE
HI5X60
CLOCK
DAC
CLK
CLK
+5V TO +3V
POWER
50 ?
SMA
CABLE
SUPPLY
HEWLETT PACKARD HP80000
PATTERN GENERATOR
SPECTRUM ANALYZER
FIGURE 2. INTERSIL HI5x60 EVALUATION SYSTEM SETUP BLOCK DIAGRAM
3-3
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