NTE1859
Integrated Circuit
dbx TV Noise Reduction Integrated Circuit
Description:
The NTE1859 is an integrated circuit designed for the dbx鈥揟V noise reduction decode circuit for multi-
channel TV sound systems. This device contains a voltage controlled amplifier, a variable de鈥揺mpha-
sis circuit with new configuration and RMS detectors with completely integrated active band pass fil-
ters, and offers the complete dbx鈥揟V noise reduction decoder only with a few external components.
Features:
D
Integrated Band Pass Filters using Active Filtering Technique and Thin Film Structure with
High Capacitance
D
Variable De鈥揺mphasis Circuit with New Circuit Configuration
D
Minimum Number of External Components
D
Wide Operation Voltage Range: 4.7V to 16V
Absolute Maximum Ratings:
(T
A
= +25擄C unless otherwise specified)
Power Supply Voltage, V
CC
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 17V
Allowable Power Dissipation, P
D
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 715mW
Operating Temperature Range, T
opr
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 鈥?0擄 to +75擄C
Storage Temperature Range, T
stg
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 鈥?5擄 to +150擄C
Recommended Operating Voltage:
Power Supply Voltage, V
CC
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5V to 15V
Electrical Characteristics:
(T
A
= +25擄C, V
CC
= +9V Reference Level: 0dB = 鈥?dBm (436mVrms)
unless otherwise specified)
Parameter
Symbol
I
CC
V
od
鈥?
V
od
鈥?
V
od
鈥?
V
od
鈥?
V
od
鈥?
V
od
鈥?
V
od
鈥?
V
od
鈥?
V
od
鈥?
Test Conditions
Min
4.0
5.5
鈥?4.5
鈥?4.5
1.3
鈥?9.4
鈥?9.6
鈥?.3
鈥?0.9
鈥?5.2
Typ
5.0
7.0
鈥?3.0
鈥?3.0
3.3
鈥?7.4
鈥?7.6
鈥?.8
鈥?8.4
鈥?2.7
Max
6.3
8.5
鈥?1.5
鈥?1.5
5.3
鈥?5.4
鈥?5.6
0.7
鈥?5.9
鈥?0.2
Unit
mA
dB
dB
dB
dB
dB
dB
dB
dB
dB
Consumption Current
Decode Characteristics
No Signal
V
i
= 鈥?dB, f = 300Hz
V
i
= 鈥?5dB, f = 300Hz
V
i
= 鈥?0dB, f = 300Hz
V
i
= 0dB, f = 1kHz
V
i
= 鈥?0dB, f = 1kHz
V
i
= 鈥?0dB, f = 1kHz
V
i
= 0dB, f = 8kHz
V
i
= 鈥?0dB, f = 8kHz
V
i
= 鈥?0dB, f = 8kHz
1
2
3
