Reduction Circuit. NTE2004 Datasheet

NTE2004 Circuit. Datasheet pdf. Equivalent

Part NTE2004
Description Integrated Circuit Dolby Noise Reduction Circuit
Feature NTE2004 Integrated Circuit [ Dolby Noise Reduction Circuit Description: The NTE2004 is a monolithic .
Manufacture NTE
Datasheet
Download NTE2004 Datasheet




NTE2004
NTE2004
Integrated Circuit
Dolby[ Noise Reduction Circuit
Description:
The NTE2004 is a monolithic audio noise reduction circuit in a 16–Lead DIP type package designed
for use in DolbyB–Type noise reduction systems. This device is used to reduce the level of back-
ground noise introduced during recording and playback of audio signals on magnetic tape and to im-
prove the noise level in FM broadcast reception.
Features:
D Accurate Record Mode Frequency Response
D Excellent Frequency Response Tracking with Temperature and VCC ±0.4dB Typ
D Excellent Back–to–Back Dynamic Response – DC Shift Less Than 20mV Typ
D Improved Stability of all OP Amps
D High Reliability Packaging
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, 60sec max), TL . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . +300°C
Electrical Characteristics: (TA = +25°C, VCC = 12V, f = 20Hz to 20kHz. All levels referenced to
580mVrms(0dB) unless otherwised specified)
Parameter
Test Conditions
Min Typ Max Unit
Supply Voltage Range
Supply Current
Voltage Gain
(Pin5–3)
VCC = 12V
f = 1kHz, Pin6 and Pin2 Connected
8 – 20
– 16 24
24.5 26.0 27.5
V
mA
dB
(Pin3–7)
Total Harmonic Distortion
2nd Harmonic
3rd Harmonic
f = 1kHz, 0dB at Pin3, Noise Reduction Out –0.5 0 +0.5 dB
f = 20Hz to 10kHz, 0dB
f = 20Hz to 10kHz, +10dB
– 0.05 0.2 %
– 0.2 0.5 %
Signal Handling
Signal–to–Noise Ratio
Record Mode
Playback Mode
VCC = 12V, 1% Distortion at 1kHz
Note 1
+12 +15 – dB
64 72 – dB
74 82 – dB
Note 1. All noise levels are measured CCIR/ARM weighted using a 10K source with respect to
Dolbylevel.



NTE2004
Electrical Characteristics (Cont’d): (TA = +25°C, VCC = 12V, f = 20Hz to 20kHz. All levels
referenced to 580mVrms(0dB) unless otherwised specified)
Parameter
Test Conditions
Min Typ Max Unit
Record Mode Frequency Response
(At Pin7) Referenced to Encode
Monitor Point (Pin3)
f = 1.4kHz 0dB
20dB
30dB
1.5 0 +1.5
17.1 15.6 14.1
24.0 22.5 21.0
dB
dB
dB
f = 5kHz 0dB
1.2 +0.3 +1.8 dB
20dB
18.3 16.8 15.3 dB
30dB
23.3 21.8 20.3 dB
40dB
30.2 29.7 28.2 dB
BacktoBack Frequency Response
Using Typical Record Mode Frequency 1.5 0 +1.5 dB
Response Test Points
Input Resistance
Pin5
35 50 65 k
Pin2
3.1 4.2 5.3 k
Output Resistance
Pin6
1.9 2.4 3.1 k
Pin3
80 120 k
Pin7
80 120 k
BacktoBack Frequency Response Shift
Versus Temperature
0° to +70°C
±0.4 dB
Versus Supply Voltage
8V to 20V
±0.4 dB
Pin Connection Diagram
C Input 1
B Input 2
B Output 3
Reference 4
A Input 5
A Output 6
S Output 7
8
16 VCC
15 F Control
14 G Output
13
12 D Input
11 C Output
10 D Filter
9 GND
16 9
18
.870 (22.0) Max
.260 (6.6)
Max
.200 (5.08)
Max
.100 (2.54)
.700 (17.78)
.099 (2.5) Min







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