1477

NTE1477
Integrated Circuit
2 Channel Amplifier for Headphone Use
Description:
The NTE1477 is a integrated circuit in a 14–Lead DIP type package suitable for use as a headphone
driving amplifier in the output amplifier of a tape deck or a tuner.
Features:
D Wide Operating Voltage Range
D Small Pop Noise by Means of Emitter Feedback
D Dual Amplifier Involved–Few Peripheral Parts
D Small Output Noise Voltage
Absolute Maximum Ratings: (TA = +25°C unless otherwise specified)
Maximum Supply Voltage, VCCmax . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 22V
Maximum Supply Current (only Pin2: flow–in; Pin7, 8: flow–out), ICP . . . . . . . . . . . . . . . . . . . . . 0.5A
Allowable Power Dissipation, PDmax . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1.05W
Operating Temperature Range, Topr . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . –20° to +70°C
Storage Temperature Range, Tstg . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . –40° to +150°C
Recommended Operating Condition: (TA = 25°±C)
Recommended Supply Voltage, VCC . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 14V
Load Resistance, RL . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8Ω or 200Ω
Operating Characteristics: (TA = +25°C, VCC = 14V, RL = 8Ω f = 1kHz, Rg = 600Ω unless
otherwise specified)
Parameter
Quiescent Current
Symbol
Test Conditions
ICCO
Voltage Gain
VG
VO = 77.5mV
Output Voltage
VO
THD = 10%
Total Harmonic Distortion
Input Resistance
Output Noise Voltage
Channel Separation
Gain Difference
Min
Typ
Max
Unit
6
8
15
mA
7
9
11
dB
0.58
0.68
–
V
THD
VO = 0.1V
–
0.5
1.0
%
ri
VO = 0.2V
20k
30k
40k
Ω
–
6
18
µV
–50
–68
–
dB
–
–
1
dB
VNO
Rg = 1kΩ, filter: 15 to 30kHz
Rg = 1kΩ
Pin Connection Diagram
Tab
N.C. 1
14 N.C.
VCC 2
Bias 3
13 Bypass
12 Bias
Rt Ch Input 4
11 Lt Ch Input
10 Bypass
Bypass 5
Rt Ch Output 6
9 Lt Ch Output
N.C. 7
.099 (2.52)
14
8 GND
8
.252
(6.45)
1
.082 (2.1) Dia
.265
(6.5)
7
.748 (19.0)
.300
(7.62)
.167
(4.26)
.100 (2.54)
.236 (6.0)
.137 (3.5)
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