ADM1024ARU ON Semiconductor, ADM1024ARU Datasheet - Page 11

• Manufacturer Part Number: ADM1024ARU
• Description: IC MONITOR SYS TEMP/VOLT 24TSSOP
• Manufacturer: ON Semiconductor

Specifications of ADM1024ARU

• Rohs Status: RoHS non-compliant
• Applications: PC's, PDA's
• Interface: Serial
• Voltage - Supply: 2.8 V ~ 5.5 V
• Package / Case: 24-TSSOP
• Mounting Type: Surface Mount

Pins 22 to 24 when they are configured as interrupt inputs by
setting Bit 7 of the Channel Mode Register. This function is
controlled for Pins 20 and 21 by Bits 6 and 7 of Configuration
Register 2.
for external temperature−sensing diodes by programming Bit 2
of the Channel Mode Register.
core voltage ID bits (VID0 to VID4, Pins 24 to 20) to be
reconfigured as interrupt inputs.
Table 2.
A−to−D Converter
approximation, Analog−to−Digital Converter (ADC). This
has a resolution of eight bits. The basic input range is 0 V to
2.5 V, which is the input range of AIN1 and AIN2, but five
Table 3. A/D Output Code vs. V
12.000–12.063
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
Bits 4 to 6 of the Channel Mode Register enable or disable
Pins 17 and 18 can be configured as analog inputs or as inputs
Bit 7 of the Channel Mode Register allows the processor
A truth table for the Channel Mode Register is given in
These inputs are multiplexed into the on−chip, successive
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
4.000–4.063
8.000–8.063
+12 V
<0.062
IN
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
1.666–1.692
3.330–3.560
5.000–5.026
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
+5.0 V
<0.026
IN
V
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
1.100–1.117
2.200–2.217
3.300–3.317
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
CC
<0.0172
IN
(3.3 V)
Input Voltage
V
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
1.666–1.692
3.330–3.560
5.000–5.026
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
CC
<0.026
(5.0 V)
http://onsemi.com
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
0.833–0.846
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
0.104–0.117
+2.5 V
<0.013
11
−
−
−
−
−
−
−
−
−
−
−
−
IN
of the inputs have built−in attenuators to allow measurement
of 2.5 V, 5.0 V, 12 V, and the processor core voltages V
and V
the tolerance of these supply voltages, the ADC produces an
output of 3/4 full scale (decimal 192) for the nominal input
Table 2. Channel Mode Register
1. Power−On Default = 0000 0000
Register Bit
Channel
Mode
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
0.900–0.914
1.800–1.814
2.700–2.714
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
CCP2
0
1
2
3
4
5
6
7
+V
<0.014
CCP 1/2
without any external components. To allow for
Controls
Int. V
Pin(s)
17, 18
Meas.
20–24
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
0.625–0.635
1.250–1.260
1.875–1.885
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
24
23
22
5
6
A
<0.010
CC
IN (1/2)
0 = FAN1, 1 = A
0 = FAN2, 1 = A
0 = 2.5 V, V
0 = 3.3 V, 1 = 5.0 V
0 = VID0, 1 = IRQ0
0 = VID1, 1 = IRQ1
0 = VID2, 1 = IRQ2
0 = VID0 to VID4,
1 = Interrupt Inputs
(1/4−Scale)
(1/2−Scale)
(3/4−Scale)
Decimal
(Note 1)
128
192
245
246
247
248
249
250
251
252
253
64
0
1
2
3
4
5
6
7
8
Function
CCP2
A/D Output
IN1
IN2
, 1 = D2–, D2+
00000000
00000001
00000010
00000011
00000100
00000101
00000110
00000111
00001000
01000000
10000000
11000000
11110101
11110110
11111000
11111001
11111010
11110111
11111011
11111100
11111101
Binary
CCP1