NTE NTE2003 Datasheet

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, V
Operating Temperature Range, T
Storage Temperature Range, T

CC

opr

stg

Lead Temperature (During Soldering, 10sec Max), T

0° to +70°C. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

–65° to +150°C. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

L

24V. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

+300°C. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Electrical Characteristics

: (VCC = 12V, TA = +25°C, NB 0dB refers to 580mV

Dolby level at

rms

Pin3 unless otherwise specified)

Parameter Test Conditions Min Typ Max Unit

Supply Voltage Range 9 – – V
Supply Current 12 17 22 mA
Voltage Gain

(Pin5–Pin3)

(Pin3–Pin7) 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)

Decode +75 80 – dB

1kHz Pin6 & Pin2 Connected 24 26 28 dB

Pin6 & Pin2 Connected, RS = 10kΩ

65 70 – dB

Electrical Characteristics (Cont’d): (VCC = 12V, TA = +25°C, NB 0dB refers to 580mV

rms

Dolby

level at Pin3 unless otherwise specified)

Parameter Test Conditions Min Typ Max Unit

Encode Characteristics (Input to Pin5) 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
Output Resistance Pin6 1.8 2.4 3.0 kΩ

Pin3 – 80 120 kΩ

Pin7 – 80 120 kΩ

Pin Connection Diagram

Variable Impedance Input

Amp B Input

Amp B Output

Bias

Amp S Output

16 9

18

.850 (21.6

1
2

3
4
5Amp A Input
6Amp A Output
7
8Decoupling

16

V

CC

15

Variable Impedance Control
Rectifier Output

14
13

Rectifier Bias

12 Rectifier Input
11 Amp D Output

10

Amp D Feedback Decoupling
GND

9

.260 (6.6) Max

.100 (2.54)

.180
(4.0)