COP8SA-DM National Semiconductor, COP8SA-DM Datasheet - Page 217

• Manufacturer Part Number: COP8SA-DM
• Description: MODULE DEBUGGING FOR COP8SA
• Manufacturer: National Semiconductor

Specifications of COP8SA-DM

• Module/board Type: Debugger Module
• For Use With/related Products: Cop 8
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• Other names: *COP8SA-DM

The A/D conversion routine used by this industrial timer is based on the single slope
technique. Instead of connecting the variable resistor into a voltage divider circuit and
measuring the voltage using the single slope technique, the variable resistor forms part
of the RC network. The time that the variable RC circuit takes to exceed the fixed
reference voltage is directly proportional to the value of the resistor, simplifying the
conversion from time into resistance. The circuit as shown can be used to program a time
proportional to the angle of the potentiometer setting. The potentiometer can be replaced
by a rotary switch connected to a series of resistors, so that each position of the switch
generates a different resistance. Here the COP8SAx7 can identify the switch positions if
the difference in each resistance for each position is greater than the inaccuracy in
measuring the absolute resistance.
COP8SAx7 APPLICATION IDEAS
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