500-003111-000
4-16
Table 4.6.3-1. ADC Format and Coding
ADC DATA FORMAT
D15
D14 D13
D12 D11
D10
D9
D8
D7
D6
D5
D4
D3
D2
D1
D0
* = Zero (binary) or extended sign (two's complement).
ADC CODING
UNIPOLAR RANGES
STRAIGHT BINARY
INPUT
0 TO +10 V
0 TO +5 V
D15
D0
+FS-1 LSB
+1/2 FS
+1 LSB
+9.9975 V
+5.0000 V
+0.0024 V
+4.9988 V
+2.5000 V
+0.0012 V
0000
0000
0000
1111
1000
0000
1111
0000
0000
1111
0000
0001
BIPOLAR RANGES
OFFSET BINARY
INPUT
±
10 V
±
5 V
D15
D0
+FS-1 LSB
+1/2 FS
+1 LSB
ZERO
-FS+1 LSB
-FS
+9.9951 V
+5.0000 V
+0.0049 V
+0.0000 V
-9.9951 V
-10.0000 V
+4.9976 V
+2.5000 V
+0.0024 V
0.0000 V
-4.9976 V
-5.0000 V
0000
0000
0000
0000
0000
0000
1111
1100
1000
1000
0000
0000
1111
0000
0000
0000
0000
0000
1111
0000
0001
0000
0001
0000
BIPOLAR RANGES
TWO'S COMPLEMENT
INPUT
±
10 V
±
5 V
D15
D0
+FS-1 LSB
+1/2 FS
+1 LSB
ZERO
-1 LSB
-FS+1 LSB
-FS
+9.9951 V
+5.0000 V
+0.0049 V
+0.0000 V
-0.0049 V
-9.9951 V
-10.0000 V
0000
0000
0000
0000
1111
1111
1111
0111
0100
0000
0000
1111
1000
1000
1111
0000
0000
0000
1111
0000
0000
1111
0000
0001
0000
1111
0001
0000
+4.9976 V
+2.5000 V
+0.0024 V
0.0000 V
0.0024 V
-4.9976 V
-5.0000 V
M3111/T4.6.3-1
*
*
*
*
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