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參數資料
型號: W83783
廠商: WINBOND ELECTRONICS CORP
英文描述: CABLE ASSEMBLY; BNC MALE TO BNC FEMALE BULKHEAD; 50 OHM, RG188-DS COAX, DOUBLE SHIELDED; 48" CABLE LENGTH; ; *USES STANDARD 50 OHM INTERFACE CONNECTORS*
中文描述: 監測集成電路
文件頁數: 16/57頁
文件大小: 312K
代理商: W83783
W83783S
Preliminary
Publication Release Date: April 1999
- 11 - Revision 0.55
VCORE
+3.3VIN
VDD(+5V)
Pin 21
Pin 20
Pin 24
12VIN
Pin 19
N12VIN
Pin 18
R6
R1
V1
N5VIN
Positive Input
Negative Input
8-bit ADC
with
16mV LSB
Typical Thermister Connection
10K, 1%
RTHM
10K, 25 C
VREF
Pin 22
VT1
Pin 23
Pin 17
Positive Inputs
R5
R7
R8
**The connections of VT2
is same as VT1
R2
R
V3
V4
Figure 11.
6.3.1 Monitor over 4.096V voltage:
The input voltage +12VIN can be expressed as following equation.
12
1
2
1
2
VIN
V
R
+
R
R
=
×
The value of R1 and R2 can be selected to 28K Ohms and 10K Ohms, respectively, when the input
voltage V1 is 12V. The node voltage of +12VIN can be subject to less than 4.096V for the maximun
input range of the 8-bit ADC. The Pin 24 is connected to the power supply VCC with +5V. There are
two functions in this pin with 5V. The first function is to supply internal analog power in the W83783S
and the second function is that this voltage with 5V is connected to internal serial resistors to monitor
the +5V voltage. The value of two serial resistors are 34K ohms and 50K ohms so that input voltage
to ADC is 2.98V which is less than 4.096V of ADC maximum input voltage. The express equation can
represent as follows.
V
VCC
K
+
K
K
V
in
=
×
50
50
34
2 98
.
where VCC is set to 5V.
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