Reduction System. NTE1744 Datasheet

NTE1744 System. Datasheet pdf. Equivalent

Part NTE1744
Description Integrated Circuit Dual dbxII Noise Reduction System
Feature NTE1744 Integrated Circuit Dual dbxII Noise Reduction System Description: The NTE1744 is an integrat.
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NTE1744
NTE1744
Integrated Circuit
Dual dbxII Noise Reduction System
Description:
The NTE1744 is an integrated circuit in a 22–Lead 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 NTE1744 to be used in battery–operated Hi–Fi
equipment.
Features:
D Wide Dynamic Range: 110dB
D Low Operating Voltage: VCCmin = 1.8V
D Minimum Number of External Components
D Adjustment: Only One
D Low Power Consumption
D Wide Operating Voltage Range: VCC = 1.8V to 14V
Absolute Maximum Ratings: (TA = +25°C unless otherwise specified)
Supply Voltage, VCC . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 14.4V
Supply Current, ICC . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5mA
Power Dissipation (TA = +75°C), PD . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 100mW
Operating Ambient Temperature range, Topr . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . –20° to +75°C
Storage Temperature Range, Tstg . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . –55° to +150°C
Electrical Characteristics: (TA = +25°C, VCC = 3V unless otherwise specified)
Parameter
Symbol
Test Conditions
Min Typ Max Unit
Input/Output Characteristics
ENCODE Mode
VOE–1 VIN = +20dB, f = 1kHz
+7.5 +10.0 +12.5 dB
VOE–2 VIN = 0dB, f = 1kHz
–2.0 0 +2.0 dB
DECODE Mode
VOE–3
VOD–1
VOD–2
VOD–3
VIN = –40dB, f = 1kHz
VIN = +10dB, f = 1kHz
VIN = 0dB, f = 1kHz
VIN = –20dB, f = 1kHz
–23 –20 –17
+17 +20 +23
–2.0 0 +2.0
–44 –40 –36
dB
dB
dB
dB
Note 1. 0dB = 20mV = –34dBV



NTE1744
Electrical Characteristics (Cont’d): (TA = +25°C, VCC = 3V unless otherwise specified)
Parameter
Symbol
Test Conditions
Min Typ Max Unit
Maximum Output Voltage
ENCODE Mode
DECODE Mode
Total Harminic Distortion
(DECODE Mode)
VOME
VOMD
THDD
THD = 1%, f = 1kHz
VO = +14dB, f = 1kHz
80 150
200 450
0.15 0.3
mV
mV
%
Noise Output Voltage
ENCODE Mode
DECODE Mode
Difference Between Channels
ENCODE Mode
DECODE Mode
Crosstalk (ENCODE Mode)
VNOE Input Short, Aweight
VNOD
100 200 µV
3 6 µV
CDE VIN = 0dB, f = 1kHz
0 1.2 dB
CDD
0 1.2
CT Measuring Channel: Short
50 60 dB
Another Channel: Output 200mV, f = 1kHz
Ripple Rejection Ratio (DECODE Mode) SVRR f = 60Hz, V = 100mV, Input Short
40 55 dB
Quiescent Current
Input/Output Characteristics
dbx OFF Mode
ICC VCC = 3V, Input Short
VOFF VIN = +20dB, f = 1kHz
1.8 3.2 mA
17 20 23 dB
Total Harmonic Distortion
dbx OFF Mode
THDOFF VIN = +20dB, f = 1kHz
0.3 1.0 %
Output Noise Voltage (dbx OFF Mode) VnOFF Input Short, Aweight
10 20 µV
Note 1. 0dB = 20mV = 34dBV
Pin Connection Diagram
Adjust 1
GND 2
RMS Input A 3
Timing A 4
CCA Input A 5
CAP1 A 6
CAP2 A 7
VOUT A 8
ON/OFF A 9
NI 10
Decode 11
22 VCC
21 N.C.
20 RMS Input B
19 Timing B
18 CCA Input B
17 CAP1 B
16 CAP2 B
15 VOUT B
14 ON/OFF B
13 I Time
12 Encode







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