W83781D Nuvoton Technology Corporation of America, W83781D Datasheet - Page 15

• Manufacturer Part Number: W83781D
• Manufacturer: Nuvoton Technology Corporation of America

Specifications of W83781D

• Lead Free Status / Rohs Status: Supplier Unconfirmed

(f)
7.2 Analog Inputs
The maximum input voltage of the analog pin is 4.096 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 and 3.3V can directly connected to these analog inputs. The +5V and +12V
inputs should be reduced a factor with external resistors so as to obtain the input range. As followed
figure is shown.
The input voltage can be expressed as following equation.
Temperature 2/3 T
SCL (Cont...)
SDA (Cont...)
SCL
SDA
Start By
Master
Positive Input
Negative Input
Typical Thermister Connection
0
1
0
D7
0
D6
OS
Serial Bus Address Byte
MSB Data Byte
Vs
Vs
0
and T
Frame 3
D5
Frame 1
1
D4
HYST
A2
Configuration Register Write
R IN
D3
R1
write
A1
D2
Positive Inputs
A0
D1
R2
R THM
R/W
+12VIN
7
R
10K, 1%
7
D0
F
Ack
781D
by
- 11 -
8
Ack
781D
by
8
+2.5VINA
+2.5VINB
VDD(+5V)
+3.3VIN
-12VOUT
-12VIN
-5VOUT Pin 29
-5VIN
0
0
VREF
VTIN3
VTIN2
VTIN1
0
D7
0
Pin 30
Pin 28
D6
Pin 31
Pin 37
Pin 38
Pin 39
Pin 40
0
Pin 36
Pin 35
Pin 34
Pin 33
Pin 32
D5
LSB Data Byte
Pointer Byte
Publication Release Date: April 14, 2005
Frame 2
Frame 4
-
-
+
+
0
W83781D/W83781G
D4
4
0
D3
0
D2
8-bit ADC
16mV LSB
D1
with
D1
D0
7
D0
7
Ack
781D
by
8
Ack
781D
by
8
Revision 2.0
Master
Stop
by