ADM1026JST ON Semiconductor, ADM1026JST Datasheet - Page 16

• Manufacturer Part Number: ADM1026JST
• Description: IC CNTRL SYS REF/EEPROM 48LQFP
• Manufacturer: ON Semiconductor

Specifications of ADM1026JST

• Rohs Status: RoHS non-compliant
• Function: Hardware Monitor
• Topology: ADC, Comparator, Multiplexer, Register Bank
• Sensor Type: External & Internal
• Sensing Temperature: 0°C ~ 100°C, External Sensor
• Output Type: SMBus™
• Output Alarm: No
• Output Fan: Yes
• Voltage - Supply: 3 V ~ 5.5 V
• Operating Temperature: 0°C ~ 100°C
• Mounting Type: Surface Mount
• Package / Case: 48-LFQFP

output of 3/4 full scale (decimal 192) for the nominal input
voltage, and so has adequate headroom to cope with over
voltages. Table 3 shows the input ranges of the analog inputs
and output codes of the ADC.
analog or local temperature input every 711 ms (typical value).
Each input is measured 16 times and the measurements are
1. * V
Table 3. A−toD Output Codes vs. V
12.000−12.063
15.313−15.375
15.375−15.437
15.437−15.500
15.500−15.563
15.562−15.625
15.625−15.688
15.688−15.750
15.750−15.812
15.812−15.875
15.875−15.938
When the ADC is running, it samples and converts an
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
4.000−4.063
8.000−8.063
+12 V
< 0.0625
>15.938
BAT
IN
is not accurate for voltages under 1.5 V (see Figure 14).
−15.928−15.855
−15.855−15.783
−15.783−15.711
−15.711−15.639
−15.639−15.566
−15.566−15.494
−15.494−15.422
−15.422−15.349
−11.375−11.303
−6.750−6.678
−2.125−2.053
1.705−1.777
1.777−1.850
1.850−1.922
1.922−1.994
1.994−2.066
2.066−2.139
2.283−2.355
2.355−2.428
2.139−2.211
2.211−2.283
< −15.928
–12 V
>2.428
−
−
−
−
−
−
−
−
−
−
−
−
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
1.667−1.693
3.333−3.359
6.406−6.432
6.432−6.458
6.458−6.484
6.536−6.563
6.563−6.589
6.589−6.615
6.615−6.641
6.38−6.406
6.484−6.51
6.51−6.536
+5.0 V
5−5.026
< 0.026
>6.634
IN
IN
3.3 V MAIN
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
1.110−1.127
2.000−2.016
3.330−3.347
4.249−4.267
4.267−4.284
4.284−4.301
4.301−4.319
4.319−4.336
4.336−4.353
4.353−4.371
4.371−4.388
4.388−4.405
4.405−4.423
< 0.0172
>4.423
Input Voltage
http://onsemi.com
2.000−2.016
3.000−3.016
3.828−3.844
3.844−3.860
3.860−3.875
3.875−3.890
3.890−3.906
3.906−3.921
3.921−3.937
3.937−3.953
3.953−3.969
3.969−3.984
>3.984
V
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
BAT
16
averaged to reduce noise, so the total conversion time for each
input is 11.38 ms.
inputs take 2.13 ms. These are also measured 16 times and
are averaged, so the total conversion time for a remote
temperature input is 34.13 ms.
Measurements on the remote temperature (D1 and D2)
0.012−0.023
0.023−0.035
0.035−0.047
0.047−0.058
0.058−0.070
0.070−0.082
0.082−0.094
0.094−0.105
0.750−0.780
1.500−1.512
2.250−2.262
2.871−2.883
2.883−2.895
2.895−2.906
2.906−2.918
2.918−2.930
2.930−2.941
2.941−2.953
2.953−2.965
2.965−2.977
2.977−2.988
< 0.012
>2.988
V
CCP
0.012−0.023
0.023−0.035
0.035−0.047
0.047−0.058
0.058−0.070
0.070−0.082
0.082−0.094
0.094−0.105
0.750−0.780
1.500−1.512
2.250−2.262
2.871−2.883
2.883−2.895
2.895−2.906
2.906−2.918
2.918−2.930
2.930−2.941
2.941−2.953
2.953−2.965
2.965−2.977
2.977−2.988
A
< 0.012
>2.988
IN (0–5)
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
2.480−2.490
A
< 0.010
>2.490
IN (6–9)
Decimal
64
(1⁄4 scale)
128
(1⁄2 scale)
192
(3⁄4 scale)
A−to−D Output
245
246
247
248
249
250
251
252
253
254
255
0
1
2
3
4
5
6
7
8
00000000
00000001
00000010
00000011
00000100
00000101
00000110
00001000
01000000
10000000
11000000
00000111
11110101
11110110
11110111
11111000
11111001
11111010
11111011
11111100
11111101
11111110
11111111
Binary