ADM1024
Table II. Channel Mode Register
Channel Mode Register Bit
0
1
2
3
4
5
6
7
Power-on Default = 0000 0000
Controls Pin(s)
5
6
17, 18
Int. V
CC
Meas.
24
23
22
20–24
Function
0 = FAN1, 1 = AIN1
0 = FAN2, 1 = AIN2
0 = 2.5 V, V
CCP2
, 1 = D2–, D2+
0 = 3.3 V, 1 = 5 V
0 = VID0, 1 = IRQ0
0 = VID1, 1 = IRQ1
0 = VID2, 1 = IRQ2
0 = VID0 to VID4, 1 = Interrupt Inputs
Table III. A/D Output Code vs. V
IN
Input Voltage
+12 V
IN
<0.062
0.062–0.125
0.125–0.188
0.188–0.250
0.250–0.313
0.313–0.375
0.375–0.438
0.438–0.500
0.500–0.563
+5 V
IN
<0.026
0.026–0.052
0.052–0.078
0.078–0.104
0.104–0.130
0.130–0.156
0.156–0.182
0.182–0.208
0.208–0.234
V
CC
(3.3 V)
<0.0172
0.017–0.034
0.034–0.052
0.052–0.069
0.069–0.086
0.086–0.103
0.103–0.120
0.120–0.138
0.138–0.155
V
CC
(5 V)
<0.026
0.026–0.052
0.052–0.078
0.078–0.104
0.104–0.130
0.130–0.156
0.156–0.182
0.182–0.208
0.208–0.234
+2.5 V
IN
<0.013
0.013–0.026
0.026–0.039
0.039–0.052
0.052–0.065
0.065–0.078
0.078–0.091
0.091–0.104
0.104–0.117
•
•
•
0.833–0.846
•
•
•
1.667–1.680
•
•
•
2.500–2.513
•
•
•
3.190–3.203
3.203–3.216
3.216–3.229
3.229–3.242
3.242–3.255
3.255–3.268
3.268–3.281
3.281–3.294
3.294–3.307
3.307–3.320
>3.320
+V
CCP1/2
<0.014
0.014–0.028
0.028–0.042
0.042–0.056
0.056–0.070
0.070–0.084
0.084–0.098
0.098–0.112
0.112–0.126
AIN(1/2)
<0.010
0.010–0.019
0.019–0.029
0.029–0.039
0.039–0.049
0.049–0.058
0.058–0.068
0.068–0.078
0.078–0.087
A/D Output
Decimal
0
1
2
3
4
5
6
7
8
Binary
00000000
00000001
00000010
00000011
00000100
00000101
00000110
00000111
00001000
4.000–4.063
1.666–1.692
1.100–1.117
1.666–1.692
0.900–0.914
0.625–0.635
64 (1/4-Scale)
01000000
8.000–8.063
3.330–3.560
2.200–2.217
3.330–3.560
1.800–1.814
1.250–1.260
128 (1/2-Scale)
10000000
12.000–12.063
5.000–5.026
3.300–3.317
5.000–5.026
2.700–2.714
1.875–1.885
192 (3/4-Scale)
11000000
15.312–15.375
15.375–15.437
15.437–15.500
15.500–15.563
15.563–15.625
15.625–15.688
15.688–15.750
15.750–15.812
15.812–15.875
15.875–15.938
>15.938
6.380–6.406
6.406–6.432
6.432–6.458
6.458–6.484
6.484–6.510
6.510–6.536
6.536–6.562
6.562–6.588
6.588–6.615
6.615–6.640
>6.640
4.210–4.230
4.230–4.245
4.245–4.263
4.263–4.280
4.280–4.300
4.300–4.314
4.314–4.331
4.331–4.348
4.348–4.366
4.366–4.383
>4.383
6.380–6.406
6.406–6.432
6.432–6.458
6.458–6.484
6.484–6.510
6.510–6.536
6.536–6.562
6.562–6.588
6.588–6.615
6.615–6.640
>6.640
3.445–3.459
3.459–3.473
3.473–3.487
3.487–3.501
3.501–3.515
3.515–3.529
3.529–3.543
3.543–3.558
3.558–3.572
3.572–3.586
>3.586
2.392–2.402
2.402–2.412
2.412–2.422
2.422–2.431
2.431–2.441
2.441–2.451
2.451–2.460
2.460–2.470
2.470–2.480
2.480–2.490
>2.490
245
246
247
248
249
250
251
252
253
254
255
11110101
11110110
11110111
11111000
11111001
11111010
11111011
11111100
11111101
11111110
11111111
–10–
REV. 0
AD [ ANALOG DEVICES ]
