740A

NTE740A
Integrated Circuit
Audio Power Amp, 2W
Description:
TheNTE740A is an Audio Power Amplifier in a 14–Lead DIP type package designed for minimal external
component requirements.
Features:
D Low Distortion
D Low Quiescent Current
D 34dB Internally Fixed Gain
D High Input Impedance
D Thermal Overload Protection
D Output Short Circuit Current Limiting
Absolute Maximum Ratings:
Supply Voltage, VCC . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 26V
Peak Output Current, IO . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1.2A
Operating Ambient Temperature Range, TA . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . –25° to +70°C
Storage Temperature Range, Tstg . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . –65° to +150°C
Electrical Characteristics: (TA = +25°C, VCC = 18V, f = 1kHz, RL = 8Ω unless otherwise specified)
Parameter
Symbol
Test Conditions
Min
Typ
Max
Unit
9
10
26
V
Supply Voltage Range
VCC
Quiescent Supply Current
ICC
No Signal Applied
–
15
–
mA
Quiescent Output Voltage
VOQ
No Signal Applied, Note 1
9
–
–
V
Output Voltage Swing
VO
Pout = 2W
–
12
–
VP–P
Voltage Gain
AV
Pout = 0
31
34
37
dB
Pout = 2W, Note 2
–
1.0
2.0
%
Pout = 50mW, Note 3
–
0.5
1.0
%
THD = 2%, RL = 8Ω, Note 4
2.0
2.5
–
W
THD = 2%, RL = 16Ω, Note 4
2.0
2.5
–
W
Each Input
140
170
–
kΩ
Pout = 0, f = 120Hz, Note 5
–
40
–
dB
f = 20Hz to 20kHz
–
60
–
µVrms
Total Harmonic Distortion
Audio Output Power
Input Impedance
Power Supply Rejection Ratio
THD
Pout
Zin
PSRR
Equivalent Input Noise Voltage
Sensitivity Input Voltage
ein
eout = 4.0Vrms, Pout = 2W
–
80
–
mV
Bandwidth (–3dB)
BW
Pout = 1W, Note 6
–
100
–
kHz
Note
Note
Note
Note
Note
1.
2.
3.
4.
5.
The quiescent output voltage typically equals 1/2 the normal VCC voltage = 1 Volt.
When driving a 16Ω load, the nominal VCC is 24V.
When driving a 16Ω load, the maximum low level distortion is reduced to 0.50%.
Tested at VCC equals nominal and measured in watts (rms).
Measurement made with a 5µF capacitor from Pin1 to GND. Voltage at Pin14 is at a ripple
frequency of 60Hz.
Note 6. Unity gain occurs between 10 and 100MHz.
Pin Connection Diagram
Bypass 1
14 VCC
(+) Input 2
GND 3
13 N.C.
12 GND
GND 4
11 GND
GND 5
10 GND
(–) Input 6
9 N.C.
GND 7
14
8 Output
8
.280 (7.1)
Max
1
7
.770 (19.5) Max
.300 (7.62)
.160 (4.0)
Max
.100 (2.45)
.600 (15.24)
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