參數(shù)資料
型號： ADM9240
廠商： Analog Devices, Inc.
英文描述： Low Cost Microprocessor System Hardware Monitor
中文描述： 低成本的微處理器系統(tǒng)硬件監(jiān)視器
文件頁數(shù)： 9/22頁
文件大小： 280K
代理商： ADM9240
ADM9240
–9–
REV. 0
T able I. A/D Output Code vs. V
IN
Input Voltage
+3.3 V
IN
<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
A/D Output
Decimal
+12 V
IN
<0.062
0.062–0.125
0.125–0.187
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
+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
+V
CCP1
<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
+V
CCP2
<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
Binary
0
1
2
3
4
5
6
7
8
00000000
00000001
00000010
00000011
00000100
00000101
00000110
00000111
00001000
l
l
l
4.000–4.063
1.666–1.692
1.100–1.117
0.833–0.846
0.900–0.914
0.900–0.914
64 (1/4 Scale)
01000000
l
l
l
8.000–8.063
3.330–3.560
2.200–2.217
1.667–1.680
1.800–1.814
1.800–1.814
128 (1/2 Scale)
10000000
l
l
l
12.000–12.063
5.000–5.026
3.300–3.317
2.500–2.513
2.700–2.714
2.700–2.714
192 (3/4 Scale)
11000000
l
l
l
15.313–15.375
15.375–15.438
15.438–15.500
15.500–15.563
15.563–15.625
15.625–15.688
15.688–15.750
15.750–15.813
15.813–15.875
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
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
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
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
245
246
247
248
249
250
251
252
253
254
255
11110101
11110110
11110111
11111000
11111001
11111010
11111011
11111100
11111101
11111110
11111111
T he input ranges of the analog inputs are shown in more detail
in T able I.
T he +V
CCP1
and +V
CCP2
inputs are used to measure processor
core voltages, and have an input range from 0 V to 3.6 V. If
only a single processor core voltage is being monitored, the
V
CCP2
input may be used to monitor the –12V supply. T his is
achieved by using a resistive divider network referenced to a
known positive dc voltage. T his is illustrated in Figure 4.
INPUT CIRCUIT S
T he internal structure for the analog inputs is shown in Figure
3. Each input circuit consists of an input protection diode, an
attenuator, plus a capacitor to form a first order low-pass filter
which gives the input immunity to high frequency noise.
MUX
+V
CCP2
97.3k
V
50pF
42.7k
V
+5V
22.7k
V
35pF
122.2k
V
55.2k
V
25pF
91.6k
V
80.9k
V
25pF
61.1k
V
111.2k
V
25pF
36.7k
V
97.3k
V
50pF
42.7k
V
+12V
+3.3V
+2.5V
+V
CCP1
Figure 3. Internal Structure of Analog Inputs
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