TC815CBU 查看數據表（PDF） - Microchip Technology
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TC815CBU
Microchip Technology
TC815CBU Datasheet PDF : 26 Pages
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TC815
3.4 Voltage Measurement
Resistive dividers are automatically changed to provide
in range readings for 200mV to 2000V full scale readings
(Figure 3-3). The input resistance is set by external
resistors R14/R13. The divider leg resistors are R9-R12.
The divider leg resistors give a 200mV signal VI
(Pin 44) for full scale voltages from 200mV to 2000V.
For applications which do not require a 10mΩ input
impedance, the divider network impedances may be
lowered. This will reduce voltage offset errors induced
by switch leakage currents.
FIGURE 3-3:
TC815 ANALOG SECTION
Ohms
Input
0.1µF
R7/100kΩ
ΩRX 50
R8/220Ω
R6/100kΩ RMREFL 31
(PTC)
0.01µF
R5/1.638MΩ
R4/163.85kΩ
ΩR5 39
ΩR4 38
R3/16385Ω
Z1
6.2V
Current Input
R2/1638.5Ω
R1/163.85Ω
ΩR3 37
ΩR2 36
ΩR 1 35
20mA
R15/9Ω
200mA
R16/1Ω
II 45
D3 D4
Voltage
Input R14/9.9MΩ
VI 44
R13/500kΩ*
*Not required when
Resistor Network is used.
R12/1.11MΩ VR2 41
R11/101kΩ VR3 40
S12 V • 1/1
S21 DE • Ω
S24W•1/10k
Ω•
S25 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 1/100 1/1k 1/10k
VCC
S10
Ω+ 1
S1 V•1/1
V• V• V• V•
1/10 1/100 1/1 1/10k
k
S6 S7 S8 S9
S2 V•1/10
S3 V•1/100
TC815
VCC
10kΩ
S44 Ω •HIΩ
1.5k
VCC S43
+ Ω • LOW
–2.8V REF AMP
1.5k
+
–
S22
DE • Ω
S22
DE • Ω
S20 DE
VCC
30 RMREFH
R18/24kΩ
R19/5kΩ
29
ANALOG
COM
34 REFHI
≈163.85mV
33 CREFH
CREFH
0.1µF
R10/10kΩ VR4 43
Common
R9/1kΩ VR2 42
4.7µF
53
D1
D2
ADO
R22
470
kW
R24
10kΩ
+ C1µ3F
+
R23 C4
10kΩ 1µF
R21
2.2
MΩ
C2 52
ADI
R26
33kΩ
R27/2kΩ
0.22 µF
ACVH 56
C1/1µF
ACVL 46
AC-to-DC
Converter
Op Amp
S4 V•1/1k
S5 V•1/10k
S18 DE
S19 DE+ Ω
+
–
S11 Ω+AC
S16 DE+
S17 DE-
S13 INT•(Ω+DC)
S14
INT•Ω•AC
S40
INT•Ω•AC
Buffer
+
S15 AZ
–
S35 S37
ΩΩ
S38 AZ
–
–
+
+
S39
INT+Ω+DC
Ω
Integrator
Comparator
S34 Ω
54 RΩ
BUF
RBUFΩ
220
kΩ
RBUFΩ
55
RVI
BUF
150
kΩ
49
CAZ
0.01µF
CAZ
47
INT
0.01µF
CINT
32 CREFL
51 CIF
R20/100kΩ
C6
0.01µF
To Digital
Section
© 2002 Microchip Technology Inc.
DS21474B-page 9
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