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dc1369af
DEMO MANUAL DC1369A
Quick start proceDure
Serial Programming
PScope has the ability to program the DC1369A board
serially through the DC890. There are several options
available in the LTC2262 family that are only available
through serially programming. PScope allows all of these
features to be tested.
These options are available by first clicking on the Set
Demo Bd Options icon on the PScope toolbar (Figure 3).
This will bring up the menu shown in Figure 4.
Figure 4. Demo Board Configuration Options
Figure 3. PScope Toolbar
This menu allows any of the options available for the
LTC2262 family to be programmed serially. The LTC2262
family has the following options:
Power Control: Selects between normal operation, nap,
and sleep modes
• Normal (Default): Entire ADC is powered, and active
• Nap: ADC core powers down while references stay
active
• Shutdown: The entire ADC is powered down
Clock Inversion: Selects the polarity of the CLKOUT signal
• Normal (Default): Normal CLKOUT polarity
• Inverted: CLKOUT polarity is inverted
Clock Delay: Selects the phase delay of the CLKOUT
signal
• None (Default): No CLKOUT delay
• 45 deg: CLKOUT delayed by 45 degrees
• 90 deg: CLKOUT delayed by 90 degrees
• 135 deg: CLKOUT delayed by 135 degrees
Clock Duty Cycle: Enable or Disables Duty Cycle Stabilizer
• Stabilizer Off (Default): Duty cycle stabilizer disabled
• Stabilizer On: Duty cycle stabilizer enabled
Output Current: Selects the LVDS output drive current
• 1.75mA (Default): LVDS output driver current
• 2.1mA: LVDS output driver current
• 2.5mA: LVDS output driver current
• 3.0mA: LVDS output driver current
• 3.5mA: LVDS output driver current
• 4.0mA: LVDS output driver current
• 4.5mA: LVDS output driver current
