KEC KIA6967S

SEMICONDUCTOR
KIA6967S
TECHNICAL DATA
BIPOLAR LINEAR INTEGRATED CIRCUIT
5 DOT LED LEVEL METER
The KIA6967S is designed for 5 LED level meter driver.
Which is consist of one input amplifier and five comparators
for LED level indication.
B
H
A
9
G
L
1
P
FEATURES
d
T
D
Low Spurious Noise Operation.
Constant Driving Current : Io=8mA(Typ.)
DIM
A
B
D
d
G
H
L
P
T
Indication Level Steps : 2dB, 2dB, 2dB, 2dB
Wide Operating Supply Voltage Range
: Vcc=4
12V
Variable Input Amplifier Gain : Gv=0 20dB
MILLIMETERS
_ 0.2
22.48 +
_ 0.2
3.2 +
_ 0.25
1.2 +
_ 0.1
0.5 +
_ 0.2
1.95 +
_ 0.3
7.7 +
_ 0.3
3.2 +
2.54
0.25+0.1/-0.05
SIP-9
MAXIMUM RATINGS (Ta=25
)
CHARACTERISTIC
SYMBOL
RATING
UNIT
VCC
14
V
VL
15
V
PD
600
mW
Operating Temperature
Topr
-25 75
Storage Temperature
Tstg
-55 150
Supply Voltage
LED Driving Terminal Voltage
Power Dissipation
Note 1) For Pin
(Note 2)
and
Note 2) Derated above Ta=25
2006. 2. 23
(Note 1)
in the proportion of 4.8mW/
Revision No : 0
for KIA6967S.
1/3
KIA6967S
ELECTRICAL CHARACTERISTICS (Unless otherwise specified, VCC=9V, f=1kHz, Ta=25 )
CHARACTERISTICS
TEST
SYMBOL
TEST CONDITION
CIRCUIT
TYP.
MAX.
UNIT
-
3
5
mA
ICCQ
-
Output Current
Io (1 5)
-
5
8
10
mA
Output Leak Current
Io (OFF)
-
-
-
50
A
VLD5 (ON)
-
-
230
-
mVrms
LD5
-
-1
0
1
LD4
-
-3
-2
-1
-5
-4
-3
Quiescent Current
Sensitivity
LED Turn-on Input Level
VIN=0V
MIN.
Rs=24k
, Rf=100k
Rs=24k , Rf=100k
Io=1mA
LD3
-
LD2
-
-7
-6
-5
LD1
-
-9
-8
-7
dB
TEST CIRCUT / BLOCK DIAGRAM
VCC
I
RD
I CC
I 04
I 05
VIN
9
CS
8
4.7uF
6
VCC
RS
24kΩ
4
I 02
3
I 01
2
1
VCC
AMP
+
+
C5
VREF
I 03
1
7
VD
C4
R5
2
+
+
C3
R4
+
C2
R3
+
C1
-
R2
R1
GND
5
100kΩ
Cf
0.47uF
Rf
INTERNAL RESISTANCE VALUE
KIA6967S
UNIT
R1
3.66
k
R2
0.948
k
R3
1.19
k
R4
1.5
k
R5
1.89
k
2006. 2. 23
Revision No : 0
2/3
KIA6967S
PRECAUTION FOR USE AND APPLICATION METHOD
VCC
I
RD
I CC
I 04
I 05
9
6
8
RS
CS
AMP
+
+
-
V REF
4
I 02
3
I 01
2
1
VCC
VCC
VIN
I 03
C5
1
R5
2
+
-
+
C4
-
R4
C3
R3
+
-
C2
+
-
C1
R2
R1
GND
5
7
Rf
Cf
1. Setting of Turn-on Level
Turn-on input level can be set through changing the voltage gain(GV) of the input amplifier. This voltage gain is determined by
the external resistor (Rs, Rf) and obtained by the equation below.
GV=20log
Rf
Rs
(use in the range of GV=0 20dB)
When Gv=0dB (Rs=Rf=100k
), the turn-on level at fifth LED is 958.3mVrms(Typ.) For turning on the fifth LED with the arbitrarily
set input level (VIN), use the following equation to set Rs and Rf.
Rf
Rs
=
958.3mVrms
VIN
(Use the resistor of Rf=56k
or over)
2. Setting of Power Dissipation and Limiting Resistor
Since the output of this IC is driver by constant current, all the output current (Io1
5)
are dissipated in the IC.
Therefore, set the limiting resistor (RD) so that the power dissipation (PD) may not exceed the maximum rating because of the
ambient temperature.
PD = VCC
ICC + (VCC - RD
I-VF) Io1 +
+ (VCC - RD
I-VF) Io5
Total output current : I = Io1 + Io2 + Io3 + Io4 + Io5
LED forward voltage : VF=1.5V
2006. 2. 23
Revision No : 0
3/3