NTE1439
Integrated Circuit
Dual Attenuator
Description:
The NTE1439 is an integrated circuit in a 14鈥揕ead DIP type package which logarithmically controls
the throughput (gain) of an audio signal by the DC voltage or resistance value and has 2 circuits. Since
voltage is internally stabilized, the stable operations are assured at the allowable supply voltage range
(8V to 14.4V). The current source is provided with control circuit so that operation can be controlled
by the voltage drop. This device is used for electronic volume control in radio, television, stereo, tape
recorder, an transceiver applications.
Features:
D
Wide Operating Voltage Range
D
High Attenuation Level
D
Easy to Control Signal Gain with a Simple Circuit
D
Less Crosstalk Between Each Channel
Absolute Maximum Ratings:
(T
A
= +25擄C unless otherwise specified)
Supply Voltage, V
CC
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 14.4V
Circuit Voltage (Note 1), V
6
, V
13
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6V
Circuit Voltage, V
3
, V
10
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . V
CC
Total Current Dissipation, I
tot
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 25mA
Total Power Dissipation, P
tot
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 360mW
Operating Ambient Temperature Range, T
opr
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 鈥?0擄 to +75擄C
Storage Temperature Range, T
stg
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 鈥?5擄 to +150擄C
Note 1. DC voltage must not be applied to Pin1, Pin2, Pin8, and Pin9 from the outside. 6V is used
as voltage for V
6
and V
13
and no larger than V
CC
voltage.
Electrical Characteristics:
(T
A
= +25擄C, V
CC
= 12V unless otherwise specified)
Parameter
Gain
Symbol
G
V1
G
V2
G
V3
Gain Ratio (Ch2/Ch1)
Test Conditions
v
i
= 100mV, V
cont
= 5V, f = 1kHz
v
i
= 100mV, V
cont
= 4V, f = 1kHz
v
i
= 100mV, V
cont
= 3V, f = 1kHz
Min
11.7
10.5
鈥?4
鈥?
Typ
鈥?/div>
鈥?/div>
鈥?/div>
鈥?/div>
Max
15.7
15.0
2
+6
Unit
dB
dB
dB
dB
G
V3(2)
/G
V3(1)
v
i
= 100mV, V
cont
= 3V, f = 1kHz
Note 2. The same measurement should be applied for Ch2.
1
2
