NTE1624
Integrated Circuit
AM/FM Radio Circuit
w
/Power Amp
Features:
D
Suitable for Use in AM/FM Portable Radios or Mainfed AM/FM Clock Radios.
D
Incorporates AM RF Amp, AM Local Oscillator, AM Mixer, AM/FM IF Amp, AM/FM Detector,
AM AGC Circuit, FM AFC Circuit and B ClassAudio Power Amplifier.
D
Using the NTE1624, Plus the Discrete Input Stage (for FM: RF Amp and Converter), It is Pos-
sible to Construct a Complete AM/FM Radios Receivers.
D
Wide Operating Voltage Range: 3V to Approx 13V, Depending on the Internal Regulator Toler-
ance.
D
As the Internal Shunt Voltage Regulator Circuit is Connected to the Supply Voltage Terminal, it
Permits a Constant Current Mode (Approximately 42mA) of Operation which is Desirable for
LineOperated Equipments.
D
AM to FM Switching is Accomplished by Switching Only DC Circuitry.
Absolute Maximum Ratings: (T
A
= +25
C unless otherwise specified)
Supply Voltage, V
CC
11V
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Supply Current, I
CC
44mA
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Power Dissipation (T
A
+65
C), P
D
600mW
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Derate Above 25
C
10mW/
C
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Operating Temperature Range, T
opr
18
to +65
C
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Storage Temperature Range, T
stg
40
to +125
C
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Thermal Resistance, JunctiontoAmbient, R
thJA
100
C/W
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Electrical Characteristics: (T
A
= +25
C, f
(AM)
= 1MHz, Mod=30%, f
(FM)
=10.7MHz
F=22.5kHz,
f
M
=1KHz, V
IN
=SG Open Voltage 6dB unless otherwise specified)
Parameter
Symbol
Test Conditions
Min
Typ
Max
Unit
Quiescent Current
I
CCQ
SW
FM, V
CC
= 3V
7
12
17
mA
SW
FM, V
CC
= 9V
10
17
23
mA
Terminal Voltage (Pin16)
V
16(FM)
SW1
FM, I
CC
= 42mA, No Signal
2.0
2.4
3.1
V
Limiting Voltage
V
IN(lim)
SW
FM, V
CC
= 5.5V, 3dB, V
16
= 2.4V,
VR = Min
57
dB
V
Internal Regulated Voltage
V
CC
SW1
AM, I
CC
= 42mA
12.5
13.2
14.0
V
Terminal Voltage (Pin16)
V
16(AM)
SW1
AM, V
CC
= 9V, No Signal
1.4
1.9
V
Electrical Characteristics (Cont'd):
(T
A
= +25
C, f
(AM)
= 1MHz, Mod=30%, f
(FM)
=10.7MHz
F=22.5kHz, f
M
=1KHz, V
IN
=SG Open Voltage 6dB unless
otherwise specified)
Parameter
Symbol
Test Conditions
Min
Typ
Max
Unit
Maximum Sensitivity
V
O
SW
AM, V
CC
= 12V, V
IN
= 37dB,
SW
45
, V
16
= 1.4V
1.5
3.0
V
Quieting Sensitivity
S/N
SW1
AM, V
CC
= 5.5V,
SW
8
, V
IN
= 37.5dB
15
20
dB
Output Power
P
OUT
SW
8
, V
CC
= 5.5V, f = 1kHz,
VH = Min., THD = 10%
0.28
W
Total Harmonic Distortion
THD
SW
45
, I
CC
= 42mA, f = 1kHz,
VR = Min., V
OUT
= 2V
0.5
4.0
%
Voltage Gain
G
V
SW
8
, V
CC
= 5.5V, f = 1kHz, VR = Min.
40
dB
Pin2 Input Impedance (AM)
R
ip2 (AM)
f = 455kHz
200
k
C
ip2 (AM)
3.0
pF
Pin2 Input Impedance (FM)
R
ip2 (FM)
f = 10.7MHz
30
k
C
ip2 (FM)
3.5
pF
Pin4 Output Impedance
R
op4
f = 455kHz
300
k
C
op4
6.0
pF
Pin6 Input Impedance
R
ip6
f = 1MHz
50
k
C
ip6
5.0
pF
Pin14 Input Impedance (AM)
R
ip14 (AM)
f = 455kHz
300
k
C
ip14 (AM)
3.5
pF
Pin14 Input Impedance (FM)
R
ip14 (FM)
f = 10.7MHz
300
k
C
ip14 (FM)
4.0
pF
Pin15 Output Impedance (AM)
R
op15 (AM)
f = 455kHz
300
k
C
op15 (AM)
5.5
pF
Pin15 Output Impedance (FM)
R
op15 (FM)
f = 10.7MHz
300
k
C
op15 (FM)
6.0
pF
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