NTE1294
Integrated Circuit
Audio Power Amplifier, 1.2W
Description:
The NTE1294 is a monolithic integrated audio amplifier in an 8Lead DIP type package designed for
use as a low frequency class B power amplifier with a wide supply voltage range (3V to 16V) in porta-
ble radios, cassette recorders, and players etc.
Features:
D
Minimum Working Supplu Voltage: V
s
= 3V Min
D
Low Quiescent Current
D
Low Number of External Components
D
Good Ripple Rejection
D
No Crossover Distortion
D
Low Power Dissipation
D
Output Power:
P
o
= 2W at 12V/8
P
o
= 1.6W at 9V/4
P
o
= 1.2W at 9V/8
Absolute Maximum Ratings:
Supply Voltage, V
s
16V
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Output Peak Current, I
o
1.5A
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Power Dissipation (T
A
= +50
C), P
tot
1W
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Junction Temperature Range, T
J
40
to +150
C
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Storage Temperature Range, T
stg
40
to +150
C
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Maximum Thermal Resistance, JunctiontoAmbient, R
thJA
100
C/W
. . . . . . . . . . . . . . . . . . . . . . . .
Electrical Characteristics: (V
S
= 9V, T
A
= +25
C unless otherwise specified)
Parameter
Symbol
Test Conditions
Min
Typ
Max Unit
Supply Voltage
V
s
3
16
V
Quiescent Output Voiltage (Pin5)
V
o
4.0
4.5
5.0
V
Quiescent Drain Current
I
d
4
12
mA
Bias Current (Pin3)
I
b
0.1
A
Electrical Characteristics (Cont'd): (V
S
= 9V, T
A
= +25
C unless otherwise specified)
Parameter
Symbol
Test Conditions
Min
Typ
Max Unit
Output Power
P
o
d = 10%,
V
s
= 12V, R
L
= 8
2
W
f = 1kHz,
R = 120
V
s
= 9V, R
L
= 4
1.6
W
R
f
= 120
V
s
= 9V, R
L
= 8
0.9
1.2
W
V
s
= 6V, R
L
= 4
0.75
W
V
s
= 3.5V, R
L
= 4
0.25
W
V
s
= 3V, R
L
= 4
0.20
W
Input Sensitivity
V
i(rms)
P
o
= 1.2W,
R
f
= 33
16
mV
R
L
= 8
,
f = 1kHz
R
f
= 120
60
mV
P
o
= 50mW,
R
f
= 33
3.5
mV
R
L
= 8
,
f = 1kHz
R
f
= 120
12
mV
Input Resistance (Pin3)
R
i
f = 1kHz
5
M
Frequency Response (3dB)
B
R
L
= 8
,
C
B
= 680pF
25 to 7000
Hz
C
5
= 1000
F,
R
f
= 120
C
B
= 220pF
25 to 20000
Hz
Distortion
d
P
o
= 500mW,
R
f
= 33
0.8
%
R
L
= 8
,
f = 1kHz
R
f
= 120
0.4
%
Voltage Gain (Open Loop)
G
v
f = 1kHz, R
L
= 8
75
dB
Voltage Gain (Closed Loop)
G
v
R
L
= 8
,
R
f
= 33
45
dB
f = 1kHz
R
f
= 120
34
dB
Input Noise Voltage
e
N
Note 1
3
V
Input Noise Current
i
N
Note 1
0.4
nA
Signal to Noise Ratio
S + N
N
P
o
= 1.2W,
R
L
= 8
,
R1 = 10k
80
dB
N
L
G
v
= 34dB,
Note 1
R1 = 50k
70
dB
Supply Voltage Rejection
SVR
R
L
= 8
, f
ripple
= 100Hz,
C6 = 47
F, R
f
= 120
42
dB
Note 1. B = 22Hz to 22kHz
PDF 
ZIP