NTE1577
Integrated Circuit
Dual, Low Noise Preamp
w
/Auto Reverse
Description:
The NTE1577 is a dual preamplifier with tape autoreverse facilityin a 16Lead DIP type package de-
signed for the amplification of low level signals in applications requiring very low noise performance, as
stereo cassette players. Each channel consists of two independent amplifiers. The first has a fixed gain
of 30dB while the second one is an operational amplifier optimized for high quality audio application.
Features:
D
Very Low Noise
D
High Gain
D
Large Output Voltage Swing
D
Low Distortion
D
Tape Autoreverse Facility
D
Single Supply Operation
D
Short Circuit Protection
D
Wide Supply Range
Absolute Maximum Ratings:
Supply Voltage, V
S
36V
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Total Power Dissipation (T
A
= +60
C), P
D
600mW
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Operating Junction Temperature Range, T
J
40
to +150
C
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Storage Temperature Range, T
stg
40
to +150
C
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Thermal Resistance, JunctiontoAmbient, R
thJA
150
C/W
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Electrical Characteristics: (T
A
= +25
C, V
S
= 14.4V, G
V
= 60dB unless otherwise specified)
Parameter
Symbol
Test Conditions
Min
Typ
Max
Unit
Supply Current
I
S
V
S
= 8V to 30V
10
mA
Output Current (Pin1 to Pin15)
Source
I
O
V
S
= 8V to 30V
10
mA
Sink
1
mA
Closed Loop Gain
G
V
f = 20Hz to 20kHz
60
dB
Electrical Characteristics (Cont'd): (T
A
= +25
C, V
S
= 14.4V, G
V
= 60dB unless otherwise specified)
Parameter
Symbol
Test Conditions
Min
Typ
Max
Unit
Input Resistance
R
i
f = 1kHz
50
80
k
Output Resistance (pins 115)
R
o
f = 1kHz
50
Total Harmonic Distortion
THD
V
O
= 300mV
f = 1kHz
0.05
%
f = 10kHz
0.05
%
Output Voltage Swing
V
O
PeaktoPeak
V
S
= 14.4V
12
V
(Pin1 to Pin15)
V
S
= 30V
28
V
Total Input Noise
e
n
Note 1
R
g
= 50
0.25
V
R
g
= 600
0.4
0.6
V
R
q
= 5k
1.3
V
SignaltoNoise Ratio
S/N
V
in
= 0.3mV, R
g
= 600
, Note 1
57
dB
V
in
= 1mV, R
g
= 0, Note 1
73
dB
Channel Separation
CS
f = 1kHz
60
dB
Crosstalk (Differential Input)
CT
f = 1kHz, Note 3
80
dB
Supply Voltage Rejection
SVR
f = 1kHz, R
g
= 600
, Note 2
120
dB
Supply Voltage Rejection of
Reference Voltage (Pin4)
SVR
f = 1kHz, R
g
= 600
, Note 2
100
dB
Reference Voltage (Pin 4)
V
ref
55
mV
Reference Voltage Output
Resistance (Pin4)
R
ref
100
Voltage Temperature Coefficient
V
ref
T
10
V/
C
Note 1. The weighting filter used for the noise measurement has a curve A frequency response.
Note 2. Referred to the input
Note 3. Between a disabled input and an input ON.
Electrical Characteristics: (V
S
= 30V unless otherwise specified)
Parameter
Symbol
Test Conditions
Min
Typ
Max
Unit
Amplifier No. 1
Gain (Pin6 to Pin5)
G
V
29
30
30.5
dB
Distortion
d
V
O
= 300mV
f = 1kHz
0.05
%
f = 10kHz
0.05
%
Total Input Noise
e
n
R
g
= 600
, Note 1
0.4
V
Output Impedance (Pin5)
Z
O
f = 1kHz
100
Output Current (Pin5)
I
O
1
mA
DC Output Voltage (Pin5)
V
5
V
S
= 10V
1.3
2
2.7
V
Note 1. The weighting filter used for the noise measurement has a curve A frequency response.
Electrical Characteristics (Cont'd): (V
S
= 30V unless otherwise specified)
Parameter
Symbol
Test Conditions
Min
Typ
Max
Unit
Amplifier No. 2
Open Loop Voltage Gain (Pin2 to Pin1)
G
V
100
dB
Input Bias Current
I
B
0.2
A
Input Offset Voltage
V
OS
2
mV
Input Offset Current
I
os
0.05
A
Small Signal Bandwidth
BW
G
V
= 30dB
150
kHz
Total Input Noise
e
n
R
g
= 600
, Note 1
2
V
Input Impedance
R
I
f = 1kHz (Open Loop)
150
500
k
Note 1. The weighting filter used for the noise measurement has a curve A frequency response.
Autoreverse:
P
in
V
12
< 2V
V
12
> 4.5V
6 10
OFF
ON
7 9
ON
OFF
V
CC
Pin Connection Diagram
1
2
3
4
Output A
NonInverting Input A
Inverting Input A
Voltage Reference
5
Output
6
Input
7
Input
16
15
14
13
Output B
NonInverting Input B
Inverting Input B
12
Threshold
11
Output
10
Input
8
GND
9
Input
PDF 
ZIP