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TC7129(2002) 查看數據表(PDF) - Microchip Technology
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产品描述 (功能)
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TC7129
(Rev.:2002)
4-1/2 Digit Analog-to-Digital Converters with On-Chip LCD Drivers
Microchip Technology
TC7129 Datasheet PDF : 24 Pages
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TC7129
FIGURE 4-11:
TC7129 FUNCTIONAL BLOCK DIAGRAM
Low Battery
Continuity
TC7129
OSC1
OSC2
OSC3
Segment Drives
Backplane
Drives
Annunciator
Drive
Latch, Decode Display Multiplexer
V
DISP
Up/Down Results Counter
Sequence Counter/Decoder
Control Logic
RANGE
L/H
CONT
V+
V-
DGND
Analog Section
DP
1
DP
2
UR/DP
3
OR/DP
4
REF HI
REF LO
INT OUT
INT IN
COMMON
IN IN
HI LO
BUFF
FIGURE 4-12:
INTEGRATOR BLOCK DIAGRAM
C
REF
R
INT
C
INT
REF HI
REF LO
IN HI
DE
INT
1
DE-
DE
DE+
–
+
Buffer
Common
IN LO
Continuity
DE+
INT
1
,
INT
2
DE-
ZI, X10
INT
REST
–
V+
200mV
–
500k
Ω
+
Continuity
Comparator
Integrator
10
–
pF
+
100pF
X10
Comparator 1
+
–
TC7129
To Display Driver
To Digital
Section
Comparator 2
DS21459B-page 14
©
2002 Microchip Technology Inc.
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