CA3162 データシートの表示（PDF） - Intersil
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CA3162 Datasheet PDF : 7 Pages
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CA3162, CA3162A
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.
V+
DP1 100kΩ
DP2
1/6 CD4049UB
22kΩ
CD4012B
1/3
CD4049UB
V+
100 100 100
kΩ kΩ kΩ
1/3
CD4049UB
1/6 CD4049UB
100kΩ 100kΩ
V+
100kΩ
100kΩ
V+
1B
V+ 16
CD4511B
1.8kΩ
2C
f 15
3 LT
4 BL
g 14
1.8kΩ
a 13
5 LE/STROBE b 12
1.8kΩ
6D
c 11
1.8kΩ
7A
d 10
1.8kΩ
8 GND
e9
1 B CA3162E D 16
2A
C 15
3 NSD
V+ 14
4 MSD GAIN 13
5 LSD
INT 12
6 HOLD HIGH 11
7 GND
LOW 10
8 ZERO ZERO 9
V+
50kΩ
V+
0.27µF
INPUT
10kΩ
GAIN
1.2kΩ
HP5082-7433
OR EQUIVALENT
1.2kΩ
12 11 10 9 8 7
f a g b c3
DP1 DP2
c1 e d c2 c dP
12 34 56
6 BUFFERS
(1 CD4050B)
FIGURE 4. TYPICAL COMMON-CATHODE LED APPLICATION
3-10
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