NTE1604
Integrated Circuit
FM IF System for Car Radio
Description:
The NTE1604 is an integrated circuit in a 16Lead SIP type package designed for use in FM car stereo
receivers. This device features versatile muting characteristics and allows receiver designers to realize
the muting performance according to their design concept.
Functions:
D
IF Amplification/Limiter
D
AFC Output
D
Muting Bandwidth
D
Quadrature Detector
D
Signal Meter Output
D
Muting Under Weak Signal Strength
D
AF Preamplifier
D
AGC Output
Features:
D
Versatile Mutings
a. When Muting Operation is Performed under a Weak Signal Strength, an Attenuation Slope
of the Audio Output Against the Input Signal Strength Varaitions can be Set at any Given
value
b. Maximum Muting Attenuation can be Selected Between about 6dB to 40dB
c. Input Signal Strength level which Actuates the Muting Circuit can be Set Freely
D
High Limiting Sensitivity (25db
Typ. with Muting OFF) Provides a Fine Quieting Characteristic
D
High SignaltoNoise Ratio: 78dB Typ
D
Low Distortion (0.05% Typ) Available, if used with DoubleTuned Circuits
D
Good AM Rejection Ratio (63dB with 6 Stages of Differential IF Amplifiers)
D
Signal Merter Drive Output Proportional to the Input Signal Strength in dB
D
Clamped (
V
BE
) AFC Output, Bandwidth Adjustable
D
Delayed AGC Output for Front End Circuit
Absolute Maximum Ratings: (T
A
= +25
C unless otherwise specified)
Maximum Supply Voltage (Pin12), V
CC
max
16V
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Maximum Supply Current (Pin12), I
CC
max
40mA
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Allowable Power Dissipation, P
D
max
T
A
= +25
C
640mW
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
T
A
= +70
C
460mW
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Input Voltage (Pin1 to Pin2), v
i
1V
PP
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
FlowIn Current (Pin2, Pin3), I
2
, I
3
0.2mA
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
FlowIn Current (Pin6), I
6
2mA
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
FlowOut Current (Pin5, Pin15, Pin16), I
5
, I
15
, I
16
1mA
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
FlowOut Current (Pin13, Pin14), I
13
, I
14
2mA
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Operating Temperature Range, T
opr
20
to +70
C
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Storage Temperature Range, T
stg
40
to +125
C
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Recommended Operating Conditions: (T
A
= +25
C unless otherwise specified)
Recommended Supply Voltage, V
CC
8V
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
V
CC
Range on Operation, V
CC
7.5V to 16V
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Electrical Characteristics: (T
A
= +25
C, V
CC
= 8V, f = 10.7MHz unless otherwise specified)
Parameter
Symbol
Test Conditions
Min
Typ
Max
Unit
Quiescent Current
I
CCO
Quiescent
15
21
27
mA
Current Dissipation
I
CC
v
in
= 100dB
20
25
30
mA
Demodulated Output
v
o
v
in
= 100dB
, 400Hz, 100% MOD
200
260
320
mV
rms
Total Harmonic Distortion
THD
v
in
= 100dB
, 400Hz, 100% MOD
0.05
0.2
%
SignaltoNoise Ratio
S/N
v
in
= 100dB
, 400Hz, 100% MOD
72
78
dB
Input Limiting Voltage
v
i(lim)
v
o
: 3dB Down, 400Hz, 100% MOD
25
29
dB
Muting Sensitivity
v
i(mute)
V
14
= 2.0V
22
26
32
dB
Muting Attenuation
Mute (A
CC
) V
6
= 2V (22k
)
v
i
= 100dB
, 400Hz,
10
15
20
dB
V
6
= 5V (22k
)
100% MOD
24
28
32
dB
Muting Bandwidth
BW (mute)
v
i
= 100dB
, V
14
= 2V
140
210
370
kHz
AM Rejection Ratio
AMR
v
i
= 100dB
, FM: 400Hz, 100% MOD,
AM: 1kHz, 30% MOD
50
63
dB
Muting Drive Output
V
140
Quiescent
3.5
4.2
5.0
V
V
14100
v
i
= 100dB
0.0
0.0
0.3
V
Signal Meter Output
V
150
Quiescent
0.0
0.1
0.3
V
V
1550
v
i
= 50dB
0.8
1.4
2.0
V
V
1570
v
i
= 70dB
1.6
2.4
3.2
V
V
15100
v
i
= 100dB
4.5
5.3
6.0
V
AGC Output
V
160
Quiescent
3.5
4.1
4.5
V
V
16100
v
i
= 100dB
0.0
0.02
0.3
V
Offset Voltage
V
713
Quiescent, Pin7 to Pin13
0.25
0.0
+0.25
V
V
813
Quiescent, Pin8 to Pin13
0.5
0.0
+0.5
V
V
CC
V
ref
Pin Connection Diagram
(Front View)
AGC
Mute Attenuation Adjust
AF Output
IF Output
AFC
Bypass
Bypass
Mute Drive
GND
15
14
13
12
"S" Meter
11
Quad Input
10
9
8
7
Mute Input
6
5
GND
4
3
2
IF Input
1
16
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