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TC818A 查看數據表(PDF) - Microchip Technology
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TC818A
Auto-Ranging Analog-to-Digital Converter with 3-1/2 Digit Display
Microchip Technology
TC818A Datasheet PDF : 24 Pages
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TC818A
FIGURE 3-1:
TC818A ANALOG SECTION
Ohms
Input
0.1µF
R7/100 k
Ω
Ω
R
X
50
R8/220
Ω
R6/100k
Ω
RM
REFL
31
(PTC)
0.1µF
R5/1.638M
Ω
Ω
R5
39
R4/163.85k
Ω
Ω
R4 38
R3/16385
Ω
Ω
R3 37
Z1
R2/1638.5
Ω
Ω
R2 36
6.2V R1/163.85
Ω
Ω
R1
35
Current Input
20mA
R15/9
Ω
200mA
R16/1
Ω
II 45
D3 D4
Voltage
Input R14/9.9 M
Ω
VI 44
R13/500k
Ω
*
*Not Required when Resistor
Network is Used
S12 V • 1/1
S21 DE •
Ω
S24
Ω
• 1/10k
S25
Ω
•
1/1k
Ω
•
S26
1/100
Ω
•
S27
1/10
S28
Ω
•1/1
S33 S32 S31 S30 S29
Ω
•
Ω
•
Ω
•
Ω
•
Ω
•
1/1 1/10 1/1001/1k 1/10k
V
CC
S10
W+1
S1 V•1/1
V• V• V• V•
1/10 1/100 1/1 1/10k
k
S6 S7 S8 S9
TC818A
V
CC
10k
Ω
S44
Ω
•HI
Ω
V
CC
1.5
Ω
S43
+
Ω
• LO
Ω
–2.8VR+E1F.5AkM
Ω
P
–
S22
DE •
Ω
S22
DE
•
Ω
R12/1.11M
Ω
VR2 41
R11/101k
Ω
VR3 40
S2
V•1/10
S3
V•1/100
S20 DE
V
CC
R18/24k
Ω
R19/5k
Ω
29
Analog
Cmmon
34
REFHI
≈
163.85mV
33 C
REFH
C
REFH
0.1µF
Common
D1
R10/10k
Ω
VR4 43
R9/1k
Ω
VR5 42
4.7µF
AC-to-DC
Converter
53
Op Amp
D2
R22
ADO
470
k
Ω
S4
V•1/1k
S5
V•1/10k
+
S18 DE
S19 DE+
Ω
–
S11
Ω
+AC
S16 DE+
32 C
REFL
S17 DE-
51 CFI
R24
10k
Ω
+C1µ3F
R23
+
C4
10k
Ω
1µF
R26
3k
Ω
R27/2k
Ω
R21
2.2
M
Ω
C2
ADI
52
0.22µF
ACVH
56
S14
S13 INT•(
Ω
+ DC)
C1/1µF
INT•
Ω
•AC
Ω
Buffer
+
ACVH 46
S40
S15 AZ
–
INT•
Ω
•AC
Ω
S35 S37
ΩΩ
S38 AZ
–
–
+
+
S39
INT+
Ω
+ DC
Comparator
Ω
Integrator
S34
Ω
54
R
Ω
BUF
R
Ω
BUF
220
k
Ω
55
RVI
BUF
150
k
Ω
49
CAZ
0.01µF
C
AZ
47
INT
0.01µF
C
INT
R
Ω
BUF
R20/100k
Ω
0.01µF
C6
To Digital
Section
©
2002 Microchip Technology Inc.
DS21475B-page 7
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