NTE15014
Integrated Circuit
Dual dbxII Noise Reduction System
Description:
The NTE15014 is an integrated circuit in a 22Lead DIP type package designed for use in dbxII noise
reduction circuits for stereo applications. This device can be used for U.S. sound multiplex TV ap-
plications and low voltage operation (1.8V) allows the NTE15014 to be used in batteryoperated HiFi
equipment.
Features:
D
Wide Dynamic Range: 110dB
D
Low Operating Voltage: V
CC
min = 1.8V
D
Minimum Number of External Components
D
Adjustment: Only One
D
Low Power Consumption
D
Wide Operating Voltage Range: V
CC
= 1.8V to 14V
Absolute Maximum Ratings: (T
A
= +25
C unless otherwise specified)
Supply Voltage, V
CC
14.4V
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Supply Current, I
CC
5mA
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Power Dissipation (T
A
= +75
C), P
D
100mW
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Operating Ambient Temperature range, T
opr
20
to +75
C
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Storage Temperature Range, T
stg
55
to +150
C
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Electrical Characteristics: (T
A
= +25
C, V
CC
= 3V unless otherwise specified)
Parameter
Symbol
Test Conditions
Min
Typ
Max
Unit
Input/Output Characteristics
ENCODE Mode
V
OE1
V
IN
= +20dB, f = 1kHz
+7.5
+10.0 +12.5
dB
V
OE2
V
IN
= 0dB, f = 1kHz
2.0
0
+2.0
dB
V
OE3
V
IN
= 40dB, f = 1kHz
23
20
17
dB
DECODE Mode
V
OD1
V
IN
= +10dB, f = 1kHz
+17
+20
+23
dB
V
OD2
V
IN
= 0dB, f = 1kHz
2.0
0
+2.0
dB
V
OD3
V
IN
= 20dB, f = 1kHz
44
40
36
dB
Note 1. 0dB = 20mV = 34dBV
Electrical Characteristics (Cont'd): (T
A
= +25
C, V
CC
= 3V unless otherwise specified)
Parameter
Symbol
Test Conditions
Min
Typ Max Unit
Maximum Output Voltage
ENCODE Mode
V
OME
THD = 1%, f = 1kHz
80
150
mV
DECODE Mode
V
OMD
200
450
mV
Total Harminic Distortion
(DECODE Mode)
THD
D
V
O
= +14dB, f = 1kHz
0.15
0.3
%
Noise Output Voltage
ENCODE Mode
V
NOE
Input Short, Aweight
100
200
V
DECODE Mode
V
NOD
3
6
V
Difference Between Channels
ENCODE Mode
CD
E
V
IN
= 0dB, f = 1kHz
0
1.2
dB
DECODE Mode
CD
D
0
1.2
Crosstalk (ENCODE Mode)
CT
Measuring Channel: Short
Another Channel: Output 200mV, f = 1kHz
50
60
dB
Ripple Rejection Ratio (DECODE Mode)
SVRR
f = 60Hz, V = 100mV, Input Short
40
55
dB
Quiescent Current
I
CC
V
CC
= 3V, Input Short
1.8
3.2
mA
Input/Output Characteristics
dbx OFF Mode
V
OFF
V
IN
= +20dB, f = 1kHz
17
20
23
dB
Total Harmonic Distortion
dbx OFF Mode
THD
OFF
V
IN
= +20dB, f = 1kHz
0.3
1.0
%
Output Noise Voltage (dbx OFF Mode)
Vn
OFF
Input Short, Aweight
10
20
V
Note 1. 0dB = 20mV = 34dBV
V
OUT
A
V
OUT
B
V
CC
Pin Connection Diagram
Encode
Decode
NI
ON/OFF A
CAP1 B
CAP2 B
1
2
3
4
Adjust
GND
RMS Input A
Timing A
5
6
CAP1 A
7
CAP2 A
8
22
21
20
19
N.C.
RMS Input B
Timing B
18
CCA Input B
17
16
15
ON/OFF B
9
14
I Time
10
13
11
12
CCA Input A
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