KL3340

TECHNICAL DATA
KL3340
ELECTRONIC ATTENUATOR
The KL3340 is a simple but very effective electronic
attenuator. This device offers up to 80 dB of attenuation control for
frequencies to 1.0 MHz. THD (distortion) is less than 1% - up to
15 dB attenuation and less that 3% - up to 40 dB.
Typical uses include instrumentation control, remote control
audio amplifiers, electronic games, and CATV (cable TV) set-top
converter audio control.
•
•
•
Designed for use in:
DC Operated Volume Control
Compression and Expansion Amplifier Applications
Controlled by DC Voltage or External Variable Resistor
Economical 8-Pin Dual-In-Line Package
8
1
P SUFFIX
PLASTIC PACKAGE
CASE 626
PIN CONNECTIONS
Vin
1
8
VCC
Control
2
7
Vo
Gnd
3
6
Rolloff
NC
4
5
NC
MAXIMUM RATINGS
(TA = +25 OC, unless otherwise noted)
Rating
Power
Supply
Voltage
Power
Dissipation
@ (TA =
+25 OC);
Derate
above TA =
+25 OC
Operating
Ambient
Temperature
Range
Symbol
VCC
Value
20
Unit
Vdc
PD
1.2
W
10
mW
O
C
TA
0 до +75
O
C
Rev. 00
IL3340
ELECTRICAL CHARACTERISTICS (ein = 100 mVrms, f = 1.0 kHz, VCC = 16 Vdc,
TA = +25 OC, unless otherwise noted)
Circuit
Characteristics
Operating Power Supply Voltage
Control Terminal Sink Current, Pin 2
(ein = 0)
Maximum Input Voltage
Voltage Gain
Attenuation range from Maximum
Gain (V2 = 6.5 Vdc)
Total Harmonic Distortion (Pin 2 Gnd)
(ein = 100 mVrms, eo = Av * ein)
Attenuation Point Av = 20 dB
Min
0.8
-
Typ
-
Max
18
2.0
Unit
Vdc
mAdc
11
70
13
80
0.5
-
Vrms
dB
dB
-
0.6
1.0
%
4.44
4.68
4.92
Vdc
Figure 2. Circuit Schematic
8
VCC
5.1k
6.2k
5.1k
6
5.1k
Roll-off
200
4.7k
750
7
Output
750
5.1k
10k
3.9k
2
5.1k
5.1k
Control
3
1
Input
20k
510
1.3k
1.5k
510
Rev. 00
IL3340
Figure 3. Attenuation versus DC Control Voltage
V2, CONTROL VOLTAGE (V)
1.5
2.5
3.5
4.5
5.5
6.5
0
VCC =
8.0 Vdc
ATTENUATION (dB)
20
VCC =
12 Vdc
VCC =
16 Vdc
40
60
80
100
Figure 4. Attenuation versus Control Resistor
RC, CONTROL RESISTOR (kOm)
1
10
100
0
40
0 dB Reference = 13 Gain
f = 1.0 kHz
60
RC, is from Pin 2 to ground
80
100
Figure5 . Frequency Response
14
12
VG, VOLTAGE GAIN (dB)
ATTENUATION (dB)
20
10
8
6
4
2
0
1.00E+02
1.00E+03
1.00E+04
1.00E+05
1.00E+06
1.00E+07
1.00E+08
f, FREQUENCY (Hz)
Rev. 00
IL3340
Figure 6. Output Voltage Swing
OUTPUT VOLTAGE SWING (Vp-p)
10
8
6
4
2
0
8
9 10 11 12 13 14 15 16 17 18
VCC, SUPPLY VOLTAGE (V)
THD, TOTAL HARMONIC DI STORTION (%)
Figure 7. Total Harmonic Distortion
4
3.5
3
2.5
2
0 dB Reference = 13
dB Gain
f = 1.0 kHz
eo = 2.5 Vrms
1.5
1
0.5
0
0
10
20
30
40
50
60
70
80
ATTENUATION (dB)
Rev. 00
IL3340
N SUFFIX PLASTIC DIP
(MS – 001BA)
A
Dimension, mm
5
8
B
1
4
MIN
MAX
A
8.51
10.16
B
6.1
7.11
5.33
C
L
F
Symbol
C
D
0.36
0.56
F
1.14
1.78
-T- SEATING
PLANE
N
G
M
K
0.25 (0.010) M
J
H
D
T
NOTES:
1. Dimensions “A”, “B” do not include mold flash or protrusions.
Maximum mold flash or protrusions 0.25 mm (0.010) per side.
G
2.54
H
7.62
J
0°
10°
K
2.92
3.81
L
7.62
8.26
M
0.2
0.36
N
0.38
D SUFFIX SOIC
(MS - 012AA)
Dimension, mm
A
8
5
B
H
1
G
P
4
D
K
MIN
MAX
A
4.8
5
B
3.8
4
C
1.35
1.75
D
0.33
0.51
F
0.4
1.27
R x 45
C
-T-
Symbol
SEATING
PLANE
J
F
0.25 (0.010) M T C M
M
G
1.27
H
5.72
J
0°
8°
K
0.1
0.25
1. Dimensions A and B do not include mold flash or protrusion.
M
0.19
0.25
2. Maximum mold flash or protrusion 0.15 mm (0.006) per side
for A; for B ‑ 0.25 mm (0.010) per side.
P
5.8
6.2
R
0.25
0.5
NOTES:
Rev. 00