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Part Name
Description
WS7106 View Datasheet(PDF) - Wing Shing International Group
Part Name
Description
Manufacturer
WS7106
3 1/2 Digit LCD/LED Display A/D Converters
Wing Shing International Group
WS7106 Datasheet PDF : 14 Pages
First
Prev
11
12
13
14
Typical Applications
(Continued)
WS7106 / WS7107
OSC 1 40
OSC 2 39
OSC 3 38
TEST 37
REF HI 36
REF LO 35
C
REF
34
C
REF
33
COMMON 32
IN HI 31
IN LO 30
A-Z 29
BUFF 28
INT 27
V - 26
G2 25
C3 24
A3 23
G3 22
BP 21
TO PIN 1
100k
Ω
100pF
10
µ
F
1k
Ω
0.1
µ
F
22k
Ω
SCALE FACTOR ADJUST
(V
REF
= 100mV FOR AC TO RMS)
470k
Ω
1N914
CA3140
5
µ
F
+
-
100k
Ω
2.2M
Ω
0.47
µ
F
47k
Ω
0.22
µ
F
10
µ
F
1
µ
F
10k
Ω
4.3k
Ω
1
µ
F 10k
Ω
1
µ
F
0.22
µ
F
+
9V
100pF
-
(FOR OPTIMUM BANDWIDTH)
TO DISPLAY
TO BACKPLANE
Test is used as a common-mode reference level to ensure compatibility with most op amps.
AC IN
FIGURE 21. AC TO DC CONVERTER WITH WS7106
+5V
ICL7107
DM7407
LED
SEGMENTS
130
Ω
130
Ω
130
Ω
FIGURE 22. DISPLAY BUFFERING FOR INCREASED DRIVE CURRENT
13
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