NTE1486
Integrated Circuit
FM/AM Tuner System
Description:
The NTE1486 is an integrated circuit in a 16+2−Lead DIP type package designed for use in stereo
applications. This high performance device integrates all the functions necessary for FM IF and
detection by AM IF amplifiers.
Functions:
FM
D
IF Amplifier
D
Detector Circuit
D
Low Noise Audio Amplifier
D
Signal Meter Circuit
D
Center Meter Circuit
D
Muting Circuit
D
AFC Circuit
AM
D
IF Amplifier
D
AGC Circuit
Features:
D
Labor Saving and Miniaturization are Possible, since the FM IF Amplifier Detection and AM IF
Amplifiers are Enclosed in the Same Package.
D
FM IF Amplifiers have High Stability due to the Adoption of the Full Balance Three Stage Direct
Coupled Differential Amplifier.
D
Utilizes the Quadrature Detection Circuit.
D
High Sensitivity (Input limiting sensitivity: 15V Typ)
D
Large Detection Output: 450mV
rms
Typ @ 100% modulation
D
Low Distortion Factor: 0.04% Typ, when the double tuning detection coil is used
D
High Signal−to−Noise Ratio: 79dB Typ
D
Muting Circuit which does not Produce the Unbalance at Right or Left when Detuning.
D
Muting Attenuation is Large: 80dB Typ
D
AM Rejection Ratio is Good: 55dB @ 100dBμ Input
D
Signal−to−Noise Ratio of AM IF is Good: 50dB @ 64dBμ Input
D
AGC FOM of AM IF is Good: 48dB
D
Electrodynamic Range for the Input of the Signal Meter is Large: 43dBμ to 115dBμ Typ
Absolute Maximum Ratings:
(T
A
= +25°C unless otherwise specified)
Supply Voltage, V
CC
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 13V
Power Dissipation (T
A
= +60°C), P
T
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 730mW
Operating Temperature Range, T
opr
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
−20°
to +70°C
Storage Temperature range, T
stg
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
−55°
to +125°C
DC Electrical Characteristics:
(T
A
= +25°C, V
CC
= 12V, Non−Signal unless otherwise specified)
Parameter
AM IF Bypass (Pin1)
AM IF Input (Pin4)
FM IF Input DC Feedback (Pin6)
FM IF Input DC Feedback (Pin7)
FM IF Input (Pin8)
Muting Control Voltage (Pin10)
Reference (Pin12)
AFC (Pin15)
Audio Output (Pin16)
Symbol
V
1
V
4
V
6
V
7
V
8
V
10
V
12
V
15
V
16
Test Conditions
Min
−
−
−
−
−
−
−
−
−
Typ
2.7
0.7
1.9
1.9
1.9
5.4
5.6
5.6
5.6
Max
−
−
−
−
−
−
−
−
−
Unit
V
V
V
V
V
V
V
V
V
AC Electrical Characteristics:
(V
CC
= 12V, Note 1 unless otherwise specified)
Parameter
Total Current Drain
FM
Limiting Sensitivity
Recovered AF Voltage
Total Harmonic Distortion
Signal−to−Noise Ratio
AM Rejection Ratio
Muting Sensitivity
Muting Attenuation
Muting Bandwidth
Meter Swing
AM
Recovered AF Voltage
Total Harmonic Distortion
Signal−to−Noise Ratio
IF AGC Figure of Merit
Input Impedance
V
02(AF)
THD
(S+N/N)
AGC(FOM) V
in
= Voltage difference from 84dBμ input,
when 10dB output down
R
in
55
−
44
−
−
82
0.5
50
48
0.9
125
2.0
−
−
−
mV
rms
%
dB
dB
kΩ
V
in(lim)
V
01(AF)
THD
(S+N/N)
AMR
V
in
(Mute)
M
ute(ATT)
BW(Mute)
V
9
−
70
V
9
−
100
V
in
= 100dBμ, FM; 400Hz,
Δf
= 75kHz,
AM; 1kHz, m = 0.3
V
10
= 1.4V
V
17
= 2V
V
10
= 1.4V, Note 2
V
in
= 70dBμ
V
in
= 100dBμ
V
in
=
−3dB
point from output voltage when
100dBμ input
−
270
−
73
−
42
73
78
0.5
3.0
31
450
0.04
79
55
48
80
130
1.8
4.4
37
700
0.1
−
−
53
−
220
−
−
dBμ
mV
rms
%
dB
dB
dBμ
dB
kHz
V
V
Symbol
I
11
Test Conditions
V
in
= 100dBμ, Mute; ON
Min
−
Typ
38.5
Max
56.2
Unit
mA
Note 1. Unless otherwise specified, test conditions are as follows:
FM: f
(IF)
= 10.7MHz, f
(MOD)
= 400Hz,
Δf
= 75kHz, V
in
= 100dBμ
AM: f
(IF)
= 455kHz, f
(MOD)
= 400Hz, m = 0.3, V
in
= 64dBμ
Note 2. BW
(mute)
is tested under sampling of ALQ = 1.0%.
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