1634

NTE1634
Integrated Circuit
Dual Preamp w/ALC
Description:
The NTE1634 is a monolithic integrated circuit in a 14–Lead DIP type package consisting of a dual
equalizer amplifier with automatic level control (ALC) and is suitable for stereo radio cassette applications.
Features:
D Dual Equalizer Amplifier with Built–In ALC Circuit.
D Recording Amp Available Because of High Gain Characteristic (Variable Monitor Possible).
D Good Channel Separation (Sep = 50dB Typ)
D Capable of Direct Meter Driving and ALS Transistor.
D Good ALC Response Balance Between Channels.
D Wider Operating Supply Voltage Range (4V to 13V)
Absolute Maximum Ratings: (TA = +25°C unles otherwise specified)
Supply Voltage, VCC . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 14V
Power Dissipation, PD . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 600mW
Operating Temperature Range, Topr . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . –20° to +70°C
Storage Temperature Range, Tstg . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . –40° to +125°C
ALC TR Maximum Current . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3.5mA
Electrical Characteristic: (TA = +25°C, VCC = 5V, RL = 10kΩ: Playback, RL = 680Ω: Recording
unless otherwise specified)
Parameter
Symbol
Test Conditions
Typ
Max
Unit
–
4.5
10
mA
–
85
–
dB
Circuit Current
ICC
Voltage Gain (Open Loop)
AVO
Voltage Gain (Closed Loop)
AV1
Play
–
40
–
dB
AV2
Record
–
58
–
dB
VO
THD = 1%, Play
0.9
1.2
–
V
THD
VO = 0.5V, Play
–
0.1
1.0
%
21
30
–
kΩ
Output Voltage
Total Harmonic Distortion
Vi = 0
Min
Input Resistance
Ri
Equivalent Input Noise Voltage
VNI
BW(–3dB)=20Hz to 20kHz
–
1.0
2.0
µV
Cross Talk
CT
Rg = 2.2KΩ
40
50
–
dB
ALC Range
Vi = –60dBm, Record
35
45
–
dB
ALC Balance
Vi = –20dBm, Record
–
0
2.0
dB
ALC Distortion
Vi = –20dBm, Record
–
0.5
2.0
%
Pin Connection Diagram
GND 1
14 VCC
13 Output 2
Output 1 2
PC 1 3
12 PC 2
NF 1 4
11 NF 2
Input 1 5
10 Input 2
ALC Output 1 6
9 ALC Output 2
ALC Input 7
8 DC
14
8
1
7
.785 (19.95) Max
.300 (7.62)
.200 (5.08)
Max
.100 (2.45)
.600 (15.24)
.099 (2.5) Min
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