LM96194CISQ/NOPB National Semiconductor, LM96194CISQ/NOPB Datasheet - Page 14

• Manufacturer Part Number: LM96194CISQ/NOPB
• Description: IC TRUTHERM HDWR MONITOR 48-LLP
• Manufacturer: National Semiconductor
• Series: PowerWise®, TruTherm®r

Specifications of LM96194CISQ/NOPB

• Function: Fan Control, Temp Monitor
• Topology: ADC (Sigma Delta), Comparator, Fan Control, Multiplexer, Register Bank
• Sensor Type: External & Internal
• Sensing Temperature: -40°C ~ 85°C, External Sensor
• Output Type: SMBus™
• Output Alarm: No
• Output Fan: Yes
• Voltage - Supply: 3 V ~ 3.6 V
• Operating Temperature: -40°C ~ 85°C
• Mounting Type: Surface Mount
• Package / Case: 48-LLP
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• Other names: LM96194CISQTR

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Value Register
100
101
102
103
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
-12.2438
-12.2191
-12.1944
-12.1697
-12.1450
-12.1203
-12.0956
-12.0709
-12.0462
-12.0215
-11.9968
-11.9721
-11.9474
-11.9228
-11.8981
-11.8734
-11.8487
-11.8240
-11.7993
-11.7746
-11.7499
-11.7252
-11.7005
-11.6758
-11.6511
-11.6264
-11.6018
-11.5771
-11.5524
-11.5277
-11.5030
-11.4783
-11.4536
-11.4289
-11.4042
-11.3795
-11.3548
-11.3301
-11.3054
-11.2807
-11.2561
-11.2314
-11.2067
-11.1820
-11.1573
-11.1326
-11.1079
-11.0832
-11.0585
-11.0338
V
IN
% Δ from −12V
-2.0313
-1.8255
-1.6197
-1.4140
-1.2082
-1.0024
-0.7967
-0.5909
-0.3851
-0.1793
0.0264
0.2322
0.4380
0.6437
0.8495
1.0553
1.2610
1.4668
1.6726
1.8784
2.0841
2.2899
2.4957
2.7014
2.9072
3.1130
3.3188
3.5245
3.7303
3.9361
4.1418
4.3476
4.5534
4.7591
4.9649
5.1707
5.3765
5.5822
5.7880
5.9938
6.1995
6.4053
6.6111
6.8168
7.0226
7.2284
7.4342
7.6399
7.8457
8.0515
14
12.8 ADDING EXTERNAL SCALING RESISTORS TO
OTHER ANALOG INPUTS
All analog inputs, except AD_IN1 through AD_IN3 and
AD_IN8, include internal resistor dividers. Further scaling of
AD_IN4 through AD_IN7 inputs with external scaling resistors
is possible if the errors due to the internal dividers are ac-
counted. The internal resistors, R
4, will present to the external divider a minimum resistive load
of 140 kΩ.
12.9 DYNAMIC Vccp MONITORING USING VID
The AD_IN4 (CPU Vccp) input is dynamically monitored using
the VIDx inputs to determine the limits. The dynamic com-
parisons operate independently of the static comparisons
which use the statically programmed limits. The LM96194
supports 3 different specifications for the Voltage Regulator
(VRM or VRD) used on motherboards with Intel CPUs with
four different VID Modes of operation. The Voltage Regulator
Specifications supported are the VRD10/VRM10, VRD10.2
Extended and VRD11/VRM11, and in this document they will
be referred to as the VRD10, VRD10.2 and VRD11 specifi-
cations, respectively.
According to the VRD 10 specification when a VID signal is
ramping to a new value, it steps by one LSB at a time, and
one step occurs every 5 µs. In worse case, up to 20 steps may
occur at once over 100 µs. The Vccp voltage from the VRD
has to settle to the new value within 50 µs of the last VID
change. The LM96194 expects that the VID changes will not
occur more frequently than every 5 µs in the VRD10 mode.
Similarly the LM96194 can support the timing requirements
of the VRD10.2 and VRD11 specifications.
The VID signals can be changed by the processor under pro-
gram control, by internal thermal events or by external control,
like force PROCHOT.
The reference voltages selected by each value of the VID
code can be found in the different VRM/VRD specifications.
FIGURE 4. AD_IN4 - AD_IN7 External Resistor Divider
Value Register
104
105
106
107
108
109
110
111
112
113
-11.0091
-10.9844
-10.9597
-10.9351
-10.9104
-10.8857
-10.8610
-10.8363
-10.8116
-10.7869
V
IN
IN
1 + R
IN
% Δ from −12V
2 shown in
10.1092
8.2572
8.4630
8.6688
8.8745
9.0803
9.2861
9.4919
9.6976
9.9034
20194421
Figure