CA3162E Intersil, CA3162E Datasheet - Page 6

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CA3162E

Manufacturer Part Number
CA3162E
Description
IC CONVERTER A/D 3-DIGIT 16-DIP
Manufacturer
Intersil
Datasheet

Specifications of CA3162E

Rohs Status
RoHS non-compliant
Other names
CA3162

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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.
100
kΩ
100
kΩ
100
kΩ
V+
1
/
6
CD4049UB
1
2
3
4
5
6
7
8
1
100kΩ
/
V+
B
A
NSD
MSD
LSD
HOLD
GND
ZERO
6
CD4049UB
100kΩ
CA3162E
50kΩ
FIGURE 4. TYPICAL COMMON-CATHODE LED APPLICATION
V+
ZERO
DP1
DP2
GAIN
HIGH
LOW
INT
V+
100kΩ
100kΩ
D
C
16
15
14
13
12
11
10
9
V+
100kΩ
INPUT
0.27µF
V+
CA3162
CD4012B
1
2
3
4
5
6
7
8
10kΩ
GAIN
22kΩ
B
C
LT
BL
LE/STROBE
D
A
GND
6
CD4511B
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+
g
b
d
a
c
e
f
16
15
14
13
12
11
10
9
1.8kΩ
1.8kΩ
1.8kΩ
1.8kΩ
1.8kΩ
1
CD4049UB
V+
/
3
1
CD4049UB
/
3
1.2kΩ
1.2kΩ
12
1
c
1
11 10
2
e
f
DP1
3
OR EQUIVALENT
d
a
HP5082-7433
9
4
DP2
c
g
2
(1 CD4050B)
8
6 BUFFERS
5
b
c
7
6
d
c
3
P

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