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CA3162 Datasheet(PDF) 6 Page - Intersil Corporation

No. de pieza CA3162
Descripción Electrónicos  A/D Converters for 3-Digit Display
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Fabricante Electrónico  INTERSIL [Intersil Corporation]
Página de inicio  http://www.intersil.com/cda/home
Logo INTERSIL - Intersil Corporation

CA3162 Datasheet(HTML) 6 Page - Intersil Corporation

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6
CA3162E Common-Cathode, LED Display Application
Figure 4 shows the CA3162E connected to a CD4511B
decode/driver to operate a common-cathode LED display.
Unlike the CA3161E, the CD4511B remains blank for all
BCD codes greater than nine. After 999mV the display
blanks rather than displaying EEE, as with the CA3161E.
When displaying negative voltage, the first digit remains
blank, instead of (-), and during a negative or positive over-
range the display blanks.
The additional logic shown within the dotted area of Figure 4
restores the negative sign (-), allowing the display of
negative numbers as low as -99mV. Negative overrange is
indicated by a negative sign (-) in the MSD position. The rest
of the display is blanked. During a positive overrange, only
segment b of the MSD is displayed. One inverter from the
CD4049B is used to operate the decimal points. By connect-
ing the inverter input to either the MSD or NSD line either
DP1 or DP2 will be displayed.
FIGURE 4. TYPICAL COMMON-CATHODE LED APPLICATION
14
15
16
9
13
12
11
10
1
2
3
4
5
7
6
8
1/
3
CD4049UB
1/
3
CD4049UB
V+
1.8k
1.8k
1.8k
1.8k
1.8k
1.2k
1.2k
12
11
10
9
8
7
6
5
4
3
2
1
DP1
DP2
fa
g
b
c3
c1
ed
c2 cdP
g
f
V+
e
a
b
c
d
B
C
LT
BL
LE/STROBE
A
D
GND
14
15
16
9
13
12
11
10
1
2
3
4
5
7
6
8
V+
C
D
ZERO
GAIN
INT
HIGH
LOW
B
A
NSD
MSD
LSD
GND
HOLD
ZERO
V+
0.27
µF
10k
GAIN
INPUT
V+
100k
100k
100k
100k
50k
V+
100
k
100
k
100
k
V+
1/
6 CD4049UB
1/
6 CD4049UB
CD4012B
22k
V+
100k
DP1
DP2
6 BUFFERS
(1 CD4050B)
CD4511B
CA3162E
HP5082-7433
OR EQUIVALENT
CA3162


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