W83697HF_05 Datasheet, PDF (24/102 Pages) Winbond – LPC I/O

W83697HF
6.3 Analog Inputs
The maximum input voltage of the analog pin is 4.096V because the 8-bit ADC has a 16mv LSB.
Really, the application of the PC monitoring would most often be connected to power suppliers. The
CPU V-core voltage, +3.3V, battery and 5VSB voltage can directly connected to these analog inputs.
The +12V,-12V and -5V voltage inputs should be reduced a factor with external resistors so as to
obtain the input range. As Figure 9.2 shows.
R1
V1
Positive Input
Positive Inputs
+12VIN
R2
VCOREA
VCOREB
+3.3VIN
AVCC(+5V)
VBAT
5VSB
Pin 100
Pin 99
Pin 98
Pin 97
Pin 74
Pin 61
Pin 96
8-bit ADC
with
16mV LSB
V2
Negative Input
R5
V3
Typical Thermister Connection
R3
N12VIN
Pin 95
N5VIN
Pin 94
R6
R4
R
10K, 1%
VREF
Pin 101
VTIN3
Pin 102
RTHM
10K, 25 C
VTIN2
VTIN1
Pin 103
Pin 104
**The Connections of VTIN1 and VTIN2
are same as VTIN3
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Publication Release Date: April 14, 2005
Revision2.0