NTE NTE2003

NTE2003
Integrated Circuit
Dolby B–Type Noise Reduction Processor
Description:
The NTE2003 is a monolithic integrated circuit in a 16–Lead DIP type package specifically designed
to realized the Dolby B–type noise reduction system.
Features:
D Reduced distortion at high frequencies and high signal levels
D Improved transient stability
D Wide Operating Voltage Range
D Low Supply Current
Absolute Maximum Ratings:
Supply Voltage, VCC . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 24V
Operating Temperature Range, Topr . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 0° to +70°C
Storage Temperature Range, Tstg . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . –65° to +150°C
Lead Temperature (During Soldering, 10sec Max), TL . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . +300°C
Electrical Characteristics: (VCC = 12V, TA = +25°C, NB 0dB refers to 580mVrms Dolby level at
Pin3 unless otherwise specified)
Parameter
Min
Typ
Max
Unit
Supply Voltage Range
9
–
–
V
Supply Current
12
17
22
mA
1kHz Pin6 & Pin2 Connected
24
26
28
dB
1kHz (Noise Reduction Out)
–1
0
1
dB
Distortion
1kHz, 0dB; 10kHz, 10dB
–
0.05
0.1
%
Signal Handling
1kHz 0.3% Distortion
10
14
–
dB
Signal–to–Noise Ratio
Encode (CCIR Weighted)
Pin6 & Pin2 Connected, RS = 10kΩ
65
70
–
dB
+75
80
–
dB
Voltage Gain
(Pin5–Pin3)
(Pin3–Pin7)
Decode
Test Conditions
Electrical Characteristics (Cont’d): (VCC = 12V, TA = +25°C, NB 0dB refers to 580mVrms Dolby
level at Pin3 unless otherwise specified)
Parameter
Test Conditions
Min
Typ
Max
Unit
1.3kHz, –20dB
–17.2
–15.7
.14.2
dB
2.5kHz, –20dB
–17.4
–15.9
–14.4
dB
3.0kHz, –30dB
–22.7
–21.2
–19.7
dB
5.0kHz, –30dB
–23.3
–21.8
–20.3
dB
10kHz, 0dB
–1.0
0.5
2.0
dB
10kHz, –40dB
–31.1
–29.6
–28.1
dB
14kHz, –30dB
–25.4
–23.9
–22.4
dB
Back–to–Back Frequency Response
With Standard Dolby B–Type Processor
–1.5
0
1.5
dB
Input Resistance
Pin5
45
65
85
kΩ
Pin2
4.3
5.6
6.9
kΩ
Pin6
1.8
2.4
3.0
kΩ
Pin3
–
80
120
kΩ
Pin7
–
80
120
kΩ
Encode Characteristics (Input to Pin5)
Output Resistance
Pin Connection Diagram
Variable Impedance Input 1
16 VCC
Amp B Input 2
Amp B Output 3
15 Variable Impedance Control
14 Rectifier Output
Bias 4
13 Rectifier Bias
Amp A Input 5
12 Rectifier Input
Amp A Output 6
Amp S Output 7
11 Amp D Output
10 Amp D Feedback Decoupling
9 GND
Decoupling 8
16
9
.260 (6.6) Max
1
8
.850 (21.6
.180
(4.0)
.100 (2.54)