NTE1497
Integrated Circuit
Audio Preamp
w
/ALC
Description:
The NTE1497 is a silicon monolithic integrated circuit in a 7−Lead SIP type package designed for use
as a high gain, low noise preamplifier with Automatic Level Control (ALC). This device is primarily
used as a record and playback amplifier in cassette tape recorders.
Features:
D
Low Noise
D
Wide Supply Voltage Range: V
CC
= 2.2V to 15V
D
High Gain: A
½o
= 70dB Typ
D
High Output Voltage: V
OM
= 1.0 V
rms
Typ.
D
Low Distortion
D
Wide ALC Range
Absolute Maximum Ratings:
(T
A
= +25°C unless otherwise specified)
Supply Voltage, V
CC
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 15V
Package Dissipation (T
A
= 75°C), P
D
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 270mW
Operating Temperature, T
opt
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
−20°
to +75°C
Storage Temperature, T
stg
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
−40°
to +125°C
Recommended Operating Conditions:
(T
A
= +25°C unless otherwise specified)
Operating Supply Voltage . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5V
Supply Voltage Range . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2.2V to 15V
Electrical Characteristics:
(T
A
= +25°C, V
CC
= 5V, f = 1kHz, R
L
= 10kΩ unless otherwise specified)
Parameter
Circuit Current
Open Loop Voltage Gain
Voltage Gain
Maximum Output Voltage
Input Impedance
Equivalent Input Noise Voltage
Collector Voltage of ALC Transistor
Symbol
I
CC
A
½o
A
½
V
OM
r
i
½
nin
V
Pin5
½
in
= 0
½
in
=
−80dBm
½
in
= −50dBm
T.H.D. = 1%
f = 1kHz
R
G
= 2.2kΩ, NAB Equalized
15 to 30kHz BPF + 40dB Amp
Pin7 to Pin6: 100kΩ, Pin7 to Pin5: 100Ω
Test Conditions
Min
0.9
64
−
0.7
−
−
−
Typ
1.5
70
33.5
1.0
100
1.2
0.7
Max
2.2
−
−
−
−
2.0
−
Unit
mA
dB
dB
V
kΩ
μV
rms
V
Power technology
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