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Спецификация NTE742 изготовлена «NTE Electronics» и имеет функцию, называемую «Integrated Circuit TV Sound Channel / 2W». |
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Детали детали
Номер произв | NTE742 |
Описание | Integrated Circuit TV Sound Channel / 2W |
Производители | NTE Electronics |
логотип |
3 Pages
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NTE742
Integrated Circuit
TV Sound Channel, 2W
Description:
The NTE742 is designed for use as the entire sound function in television receivers or FM table radios.
The NTE742 sound channel will directly drive a 16 ohm speaker with more than 2 watts output. This
monolithic integrated circuit will operate from a single 18V to 28V power supply and can also function
(with reduced power output) with supplies as low as 12V if additional decoupling is provided.
The NTE742 is supplied in an improved 16–lead plastic dual in–line package with heat–sink contact
tabs. A copper alloy lead frame allows maximum power dissipation with standard cooling methods.
The unique lead configuration allows easy attachment of a heat sink and yet permits the use of a stan-
dard IC socket or printed wiring board layout.
Features:
D Low limiting Threshold
D Low External Parts Count
D Wide Operating Voltage Range
D 70dB Limiter Gain
D Automatic Thermal Shutdown
D Output Current Limiting
D Ripple Rejection Greater Than 20dB
Absolute Maximum Ratings:
Supply Voltage, VCC . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . +28V
Regulator Output Current, IREG . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10mA
Input Voltage (Pin 10), VIN . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . +4.0V
Operating Temperature Range, TA . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . –40° to +85°C
Storage Temperature Range, TS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . –65° to +150°C
Static Electrical Characteristics: (TA = +25°C, VCC = 24V unless otherwise specified)
Parameter
Symbol
Test Conditions
Min Typ Max
Quiescent Supply Current
Terminal Voltage
ICC
V2
V3
VOUT
VREG
VIN
V14, V15
V16
VIN = 0
VIN = 0
25 45 60
– 10 –
– 2.6 –
– 12 –
14 15 16
– 1.4 –
–4–
–8–
Unit
mA
V
V
V
V
V
V
V
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Dynamic Electrical Characteristics:
(TA = +25°C, VCC = 24V, fo = 4.5MHz, fm = 400Hz, ∆f = 25kHz, VIN = 10mV unless otherwise specified)
Parameter
Symbol
Test Conditions
Min Typ Max Unit
Input Limiting Threshold
AM Rejection
VTH
AMR
Note 1
Note 2
– 150 400 µV
30 > 50 – dB
Recovered Audio
Total Harmonic Distortion
VOUT
THD
Test Pin16
500 700 900 mV
– <1 3 %
Volume Control Voltage
Test Pin6, POUT = 2W
V1 –3dB, Note 3
–20dB, Note 3
– 2.5 10
6.0 7.5 10
2.0 2.8 4.0
%
V
V
–40dB, Note 3
0.75 1.2 1.8 V
Playthrough
Power Amp Voltage Gain
Output Current Limiting
Output Tracking
Output Noise
Power Amp Impedance
Ae
IOUT
VOUT/VCC
en
Zin
V1 = 0V
VOUT = 1V
RL = 0Ω
VCC = 18V to 27V
VIN = 0V, V1 = 10V
f = 1kHz
– 5 25 mV
25 27 29 dB
– 800 – mA
– 0.5 – V/V
– 5 25 mV
– 50 – kΩ
Note 1. Adjust V1 for VOUT = 2V, then reduce VIN until VOUT = 1.4V (–3dB).
Note 2. Adjust V1 for VOUT = 2V.
Note 3. Reference is VOUT at Pin 6 with V1 = 12V.
Pin Connection Diagran
DC Volume Control 1
Detector Output 2
Amplifier Input 3
F
GND i
n
Audio Output 6
VCC 7
Regulator Output 8
16 De–Emphasis
15 Phase Shift
14 Phase Shift
F
i GND
n
11 IF Decoupling
10 IF Input
9 Low–Level GND
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.202 (5.12)
16 9
18
.770 (19.5)
Max
.254 (6.45)
.168 (4.26) Max
.100 (2.54)
.141
(3.6)
.700
(17.78)
.138
(3.5)
.300 (7.62)
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