101-0506 Rabbit Semiconductor, 101-0506 Datasheet - Page 102

• Manufacturer Part Number: 101-0506
• Description: CARD CPU SR9160 128K SRAM SMRTST
• Manufacturer: Rabbit Semiconductor

Specifications of 101-0506

• Accessory Type: Smart Star CPU Card
• For Use With/related Products: SR9160
• Lead Free Status / RoHS Status: Contains lead / RoHS non-compliant

9.2 User Interface
Figure 38 shows the D/A converter circuit. A buffer, U6, buffers the data signals D0–D7
from the Smart Star backplane, and sends them to the D/A converter, U2–U5. Signals D2–
D5 are used to switch the chip select line to identify which D/A converter will perform the
conversion. The model of D/A Converter Card determines the analog output ranges (0 V to
10 V, -10 V to +10 V, or 4–20 mA). The different voltage or current ranges are handled with
different feedback resistors, as shown in Figure 38. A switching regulator provides a regu-
lated power supply for the op-amps.
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NOTE: The D/A_SEN[0–7] sensing inputs are not used when using the current source
version (model SR9420) of the D/A Converter Card.
Figure 38. D/A Converter Card Circuit
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Smart Star D/A Converter Cards (SR9400)
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