Hardware Manual - RTD Embedded Technologies, Inc.
Hardware Manual - RTD Embedded Technologies, Inc.
Hardware Manual - RTD Embedded Technologies, Inc.
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The two D/A converters can be individually programmed to convert 12-bit digital words into a voltage in the<br />
range of ± 5, 0 to +5, ±10, or 0 to +10 V. DAC1 is programmed by writing the 12-bit word to BA + 0x0Ch. DAC2<br />
is identical, with the 12-bit word written to BA + 0x0Eh. The outputs of both DACs are updated independently<br />
when you write the 12-bit word. The 12-bit information is right-justified in the 16-bit word.<br />
The following table lists the key digital codes and corresponding output voltages for the D/A converters.<br />
Ideal Output Voltage (mV)<br />
D/A Bit Weight<br />
–5 to +5 V 0 to +5 V –10 to +10 V 0 to +10 V<br />
4095 (full-scale) +4997.56 +4998.78 9995.12 +9997.56<br />
2048 0000.00 +2500.00 0000.00 +5000.00<br />
1024 –2500.00 +1250.00 –5000.00 +2500.00<br />
512 –3750.00 +625.00 –7500.00 +1250.00<br />
256 –4375.00 +312.50 –8750.00 +625.00<br />
128 –4687.50 +156.25 –9375.00 +312.50<br />
64 –4843.75 +78.13 –9687.50 +156.25<br />
32 –4921.88 +39.06 –9843.75 +78.13<br />
16 –4960.94 +19.53 –9921.88 +39.06<br />
8 –4980.47 +9.77 –9960.94 +19.53<br />
4 –4990.23 +4.88 –9980.47 +9.77<br />
2 –4995.12 +2.44 –9990.23 +4.88<br />
1 –4997.56 +1.22 –9995.12 +2.44<br />
0 –5000.00 0.00 –10.00 0.00<br />
100 DM6425HR dataModule BDM-610010034 Rev C
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