NTE NTE1578

NTE1578
Integrated Circuit
FM Mixer/IF Amp
Description:
The NTE1578 is an FM front–end integrated circuit in a 16–Lead DIP type package designed for use
in car radio and home stereo applications. This device has a built–in AGC driver circuit which improves interference characteristics. It thereby offers advantages such as improved interference characteristics without sacrificing usable sensitivity and the conventional DX–LOCAL change–over
switch.
Features:
D Double–Balanced Type MIX (Improved Spurious Characteristic)
D Keyed AGC/Keyed Classical AGC (Improved Intermodulation, Cross Modulation Characteristic)
D Differential IF Amplification (Improved Limiting Characteristic)
Absolute Maximum Ratings: (TA = +25°C unless otherwise specified)
Maximum Supply Voltage (Pin12, Pin15), VCC1max . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8.5V
Maximum Supply Voltage (Pin5, Pin6), VCC2max . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 16V
Allowable Power Dissipation (TA ≤ +50°C, Note 1), PDmax . . . . . . . . . . . . . . . . . . . . . . . . . . . . 600mW
Operating Temperature Range, Topg . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . –20° to +70°C
Storage Temperature Range, Tstg . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . –40° to +125°C
Note 1. PDmax = 460mW at TA = +70°C
Recommended Operation Condition: (TA = +25°C unless otherwise specified)
Recommended Supply Voltage (Pin12, Pin15), VCC1 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8V
Recommended Supply Voltage (Pin5, Pin6), VCC2 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 13V
Electrical Characteristics: (TA = +25°C, VCC1 = 8V, VCC2 = 13V unless otherwise specified)
Parameter
Dissipation Current
Symbol
Test Conditions
Min
Typ
Max
Unit
ICC1
Pin 12, 15
17
25
36
mA
ICC2
Pin 5, 6
5
8
11
mA
Local OSC Input Offset
∆VINOSC
–20
0
20
mV
MIX Input Offset
∆VINMIX
–20
0
20
mV
∆IOUT MIX
–600
0
600
µA
MIX Output Offset
High Level AGC Output
VAGC H
Vi = 0dBu, VCL = 4V
7.6
7.9
–
V
Low Level AGC Output
VAGC L
Vi = 100dB, VCL = 4V
–
0.5
1
V
Electrical Characteristics (Cont’d): (TA = +25°C, VCC1 = 8V, VCC2 = 13V unless otherwise specified)
Parameter
Symbol
AGC Control Input
Test Conditions
Min
Typ
Max
Unit
VCL 7
Vi = 100dBu, VAGC = 7V
–
0.35
0.6
V
VCL 2
Vi = 100dBu, VAGC = 2V
1.2
1.7
2.2
V
230
330
430
ohm
IF Input Resistance
RIN
Voltage Gain
VG
Vi = 62dBu
80
85
90
dBµ
Vi lim
VAGC = 2V
62
71
80
dBµ
AGC Input Voltage
Vi AGC
VAGC = 2V
62
71
80
dBµ
Saturation Output Voltage
VOUT
Vi = 100dBµ
91
95
–
dBµ
Input Limiting Voltage
Pin Connection Diagram
IF Input 1
IF Decoupling 2
GND 3
AGC Input 4
16 IF Output
15 VCC
14 AGC Inhibit
13 AGC Output
Mixer Output 5
12 VCC
Mixer Output 6
11 GND
OSC Input 7
10 RF Input
OSC Input 8
9 RF 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)