1577

NTE1577
Integrated Circuit
Dual, Low Noise Preamp
w/Auto Reverse
Description:
The NTE1577 is a dual preamplifier with tape autoreverse facilityin a 16–Lead DIP type package designed 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, VS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 36V
Total Power Dissipation (TA = +60°C), PD . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 600mW
Operating Junction Temperature Range, TJ . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . –40° to +150°C
Storage Temperature Range, Tstg . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . –40° to +150°C
Thermal Resistance, Junction–to–Ambient, RthJA . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 150°C/W
Electrical Characteristics: (TA = +25°C, VS = 14.4V, GV = 60dB unless otherwise specified)
Parameter
Symbol
Supply Current
IS
Output Current (Pin1 to Pin15)
Source
IO
Test Conditions
Min
Typ
Max
Unit
VS = 8V to 30V
–
10
–
mA
VS = 8V to 30V
–
10
–
mA
–
1
–
mA
–
60
–
dB
Sink
Closed Loop Gain
GV
f = 20Hz to 20kHz
Electrical Characteristics (Cont’d): (TA = +25°C, VS = 14.4V, GV = 60dB unless otherwise specified)
Parameter
Symbol
Test Conditions
Min
Typ
Max
Unit
Input Resistance
Ri
f = 1kHz
50
80
–
kΩ
Output Resistance (pins 1–15)
Ro
f = 1kHz
–
50
–
Ω
f = 1kHz
–
0.05
–
%
f = 10kHz
–
0.05
–
%
–
12
–
V
VS = 30V
–
28
–
V
Rg = 50Ω
–
0.25
–
µV
Rg = 600Ω
–
0.4
0.6
µV
Rq = 5kΩ
–
1.3
–
µV
Vin = 0.3mV, Rg = 600Ω, Note 1
–
57
–
dB
Vin = 1mV, Rg = 0, Note 1
–
73
–
dB
Total Harmonic Distortion
THD
Output Voltage Swing
(Pin1 to Pin15)
VO
Total Input Noise
en
Signal–to–Noise Ratio
VO = 300mV
Peak–to–Peak VS = 14.4V
Note 1
S/N
Channel Separation
CS
f = 1kHz
–
60
–
dB
Crosstalk (Differential Input)
CT
f = 1kHz, Note 3
–
80
–
dB
Supply Voltage Rejection
SVR
f = 1kHz, Rg = 600Ω, Note 2
–
120
–
dB
Supply Voltage Rejection of
Reference Voltage (Pin4)
SVR
f = 1kHz, Rg = 600Ω, Note 2
–
100
–
dB
Reference Voltage (Pin 4)
Vref
–
55
–
mV
Reference Voltage Output
Resistance (Pin4)
Rref
–
100
–
Ω
Voltage Temperature Coefficient
∆Vref
∆T
–
10
–
µV/°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: (VS = 30V unless otherwise specified)
Parameter
Symbol
Test Conditions
Min
Typ
Max
Unit
29
30
30.5
dB
f = 1kHz
–
0.05
–
%
f = 10kHz
–
0.05
–
%
Amplifier No. 1
Gain (Pin6 to Pin5)
Distortion
GV
d
VO = 300mV
Total Input Noise
en
Rg = 600Ω, Note 1
–
0.4
–
µV
Output Impedance (Pin5)
ZO
f = 1kHz
–
100
–
Ω
Output Current (Pin5)
IO
–
1
–
mA
DC Output Voltage (Pin5)
V5
1.3
2
2.7
V
VS = 10V
Note 1. The weighting filter used for the noise measurement has a curve A frequency response.
Electrical Characteristics (Cont’d): (VS = 30V unless otherwise specified)
Parameter
Symbol
Test Conditions
Min
Typ
Max
Unit
Amplifier No. 2
Open Loop Voltage Gain (Pin2 to Pin1)
GV
–
100
–
dB
Input Bias Current
IB
–
0.2
–
µA
Input Offset Voltage
VOS
–
2
–
mV
Input Offset Current
Ios
–
0.05
–
µA
Small Signal Bandwidth
BW
GV = 30dB
–
150
–
kHz
–
2
–
µV
150
500
–
kΩ
Total Input Noise
en
Rg = 600Ω, Note 1
Input Impedance
RI
f = 1kHz (Open Loop)
Note 1. The weighting filter used for the noise measurement has a curve A frequency response.
Autoreverse:
V12 < 2V
V12 > 4.5V
Pin
6 – 10
OFF
ON
7–9
ON
OFF
Pin Connection Diagram
Output A 1
Non–Inverting Input A 2
Inverting Input A 3
Voltage Reference 4
Output 5
16 VCC
15 Output B
14 Non–Inverting Input B
13 Inverting Input B
12 Threshold
Input 6
11 Output
Input 7
10 Input
GND 8
9 Input
16
9
.260 (6.6) Max
1
8
.785 (19.9)
Max
.300
(7.62)
.200 (5.08)
Max
.245
(6.22)
Min
.100 (2.54)
.700 (17.7)
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