W83637HF Datasheet, PDF (31/149 Pages) Winbond – LPC I/O

W83637HF
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(pin 74) and 5VSB voltage can directly connected to these analog
inputs. The +12V voltage inputs should be reduced a factor with external resistors so as to obtain the
input range. As Figure 6.2 shows.
Power Inputs
+5VIN
+3.3VIN
VBAT
5VSB
Pin 114
Pin 98
Pin 74
Pin 61
V1
Positive Voltage Input
V2
Negative Voltage Input
CPUVCORE
R1
R2
R3
R5
VIN1
VIN2
Pin 100
Pin 99
8-bit ADC
with
16mV LSB
Pin 97
RTHM
10K@25 C, beta=3435K
R
10K, 1%
R
30K, 1%
CPUD+
CPUD-
CAP,3300p
R4
VREF
VTIN
CPUTIN
SYSTIN
Pin 102
Pin 103
Pin 104
Pin 101
CPUD- _{Pin 111}
Figure. 6.2
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Publication Release Date: June 25, 2003
Revision 1.3