PERFORMANCE
Copyright 2001
4-4
DAC128V HARDWARE REFERENCE
Table 4-2 Wrong Power Supplies
Code)
Voltage
Output (mV)
∆∆∆∆
V (mV)
Code)
Voltage
Output (mV)
∆∆∆∆
V (mV)
0x800 00.2
6.9 0x812 43.0
0.3
0x801 07.1
4.6 0x813 43.4
0.4
0x802 11.7 6.1 0x814 43.6
0.2
0x803 17.8
2.2 0x815 44.4
0.8
0x804 20.0 10.0 0x816 44.6
0.2
0x805 30.0
3.1 0x817 44.9
0.3
0x806 33.1
3.4 0x818 45.2
0.3
0x807 36.5
0.9 0x819 46.7
1.5
0x808 37.4
1.8 0x81A 47.3
0.6
0x809 39.2
0.5 0x81B 48.4
1.1
0x80A 39.7
0.8 0x81C 49.1
0.7
0x80B 40.5
0.2 0x81D 51.0
0.9
0x80C 40.7
0.8 0x81E 51.7
0.7
0x80D 41.5
0.3 0x81F 52.6
0.9
0x80E 41.8
0.2 0x820 158.5 105.9
0x80F 42.0
0.1 0x821 166.5
8.0
0x810 42.1
0.1 0x822 171.8
5.3
0x811 42.7
0.6 0x823 179.0
7.2
NOTE: 4.8828 mV/bit is the theoretical
∆
V
Similar mid-scale anomalies were noticed for 0
→
+10, 0
→
-10, -5
→
+10, and +5
→
-10 V ranges. However, quarter scale and full-scale codes yielded the expected outputs.
For the ±10 V range example, codes of 0x000, 0x400, 0x800, 0xC00, and 0xFFF yielded
the expected results: -10.0 V, -5.00 V, 0.00 V, +5.00 V, and +10.0 V output, respectively.
.
NOTE
: Use external ±15 V supplies for any 10 V range usage.
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