Settling Time - Linear Technology LTC1592 Quick Start Manual

QUICK START GUIDE FOR DEMONSTRATION CIRCUIT 572

SETTLING TIME

To measure settling of the LTC1592, connect the
output BNC to an oscilloscope input with a barrel
connector (not a cable.) Be sure that the oscillo-
scope can tolerate the voltage that is being applied
directly to the input. Select the Square wave output
on the control panel, and enter the desired high and
low voltages.
For large voltage swings, the oscilloscope can trig-
ger directly on the analog output. For smaller
Figure 1. 5V Step, 0-5V Range
Figure 3. 20V Step, +/-10V Range
swings it may be useful to trigger on the CS/LD tur-
ret. The rising edge of this signal initiates a transi-
tion on the DAC output.
Figures 1 through 4 show the full-scale step re-
sponse of DC572 for various output ranges.
Scope Channel 4 is the analog output from the
LT1469 amplifier and Channel 3 is the CS/LD signal.
Figure 2. –5V Step, 0-5V Range
Figure 4. -20V Step, +/-10V Range
16-BIT SOFTSPAN DAC
5