28128 Parallax Inc, 28128 Datasheet - Page 90
28128
Manufacturer Part Number
28128
Description
KIT BASIC ANALOG/DIGI PARTS ONLY
Manufacturer
Parallax Inc
Datasheet
1.28129.pdf
(176 pages)
Specifications of 28128
Accessory Type
ADC, DAC
Product
Microcontroller Accessories
For Use With/related Products
BASIC Stamp® 2 and Board of Education
Lead Free Status / RoHS Status
Lead free / RoHS Compliant
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Figure 4-6 shows the output. Try that with a hand held voltmeter and you’ll begin to see
the usefulness of combining the BASIC Stamp with analog interfaces. Imagine trying to
test all 4096 levels of a 12-bit DAC one at a time!
This is a very efficient way to collect your voltage sweep data. Looking at the data for the
voltage sweep brings several things to light. First, the voltage output for the D/A
converter is always a little high. Second, the error increases as the output voltage
Figure 4-6
Debug Terminal
Sample Output for
Program Listing 4.1,
Revision 3.
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