NTE NTE1604

NTE1604
Integrated Circuit
FM IF System for Car Radio
Description:
The NTE1604 is an integrated circuit in a 16–Lead 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
D
D
D
Signal Meter Output
Muting Under Weak Signal Strength
AF Preamplifier
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 (25dbµ Typ. with Muting OFF) Provides a Fine Quieting Characteristic
D High Signal–to–Noise Ratio: 78dB Typ
D Low Distortion (0.05% Typ) Available, if used with Double–Tuned 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 (±VBE) AFC Output, Bandwidth Adjustable
D Delayed AGC Output for Front End Circuit
Absolute Maximum Ratings: (TA = +25°C unless otherwise specified)
Maximum Supply Voltage (Pin12), VCCmax . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 16V
Maximum Supply Current (Pin12), ICCmax . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 40mA
Allowable Power Dissipation, PDmax
TA = +25°C . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 640mW
TA = +70°C . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 460mW
Input Voltage (Pin1 to Pin2), vi . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . ±1VP–P
Flow–In Current (Pin2, Pin3), I2, I3 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . ±0.2mA
Flow–In Current (Pin6), I6 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2mA
Flow–Out Current (Pin5, Pin15, Pin16), I5, I15, I16 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1mA
Flow–Out Current (Pin13, Pin14), I13, I14 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2mA
Operating Temperature Range, Topr . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . –20° to +70°C
Storage Temperature Range, Tstg . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . –40° to +125°C
Recommended Operating Conditions: (TA = +25°C unless otherwise specified)
Recommended Supply Voltage, VCC . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8V
VCC Range on Operation, VCC . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7.5V to 16V
Electrical Characteristics: (TA = +25°C, VCC = 8V, f = 10.7MHz unless otherwise specified)
Parameter
Symbol
Test Conditions
Min
Typ
Max
Unit
Quiescent Current
ICCO
Quiescent
15
21
27
mA
Current Dissipation
ICC
vin = 100dBµ
20
25
30
mA
Demodulated Output
vo
vin = 100dBµ, 400Hz, 100% MOD
200
260
320
mVrms
Total Harmonic Distortion
THD
vin = 100dBµ, 400Hz, 100% MOD
–
0.05
0.2
%
Signal–to–Noise Ratio
S/N
vin = 100dBµ, 400Hz, 100% MOD
72
78
–
dB
Input Limiting Voltage
vi(lim)
vo: 3dB Down, 400Hz, 100% MOD
–
25
29
dBµ
V14 = 2.0V
22
26
32
dBµ
10
15
20
dB
24
28
32
dB
vi = 100dBµ, V14 = 2V
140
210
370
kHz
Muting Sensitivity
Muting Attenuation
vi(mute)
Mute (ACC) V6 = 2V (22kΩ)
V6 = 5V (22kΩ)
Muting Bandwidth
BW (mute)
vi = 100dBµ, 400Hz,
100% MOD
AM Rejection Ratio
AMR
vi = 100dBµ, FM: 400Hz, 100% MOD,
AM: 1kHz, 30% MOD
50
63
–
dB
Muting Drive Output
V14–0
Quiescent
3.5
4.2
5.0
V
vi = 100dBµ
0.0
0.0
0.3
V
V15–0
Quiescent
0.0
0.1
0.3
V
V15–50
vi = 50dBµ
0.8
1.4
2.0
V
V15–70
vi = 70dBµ
1.6
2.4
3.2
V
V15–100
vi = 100dBµ
4.5
5.3
6.0
V
Quiescent
3.5
4.1
4.5
V
vi = 100dBµ
0.0
0.02
0.3
V
V14–100
Signal Meter Output
AGC Output
V16–0
V16–100
Offset Voltage
V7–13
Quiescent, Pin7 to Pin13
–0.25
0.0
+0.25
V
V8–13
Quiescent, Pin8 to Pin13
–0.5
0.0
+0.5
V
Pin Connection Diagram
(Front View)
16
15
14
13
12
11
10
9
8
7
6
5
4
3
2
1
AGC
“S” Meter
Mute Drive
Vref
VCC
Quad Input
GND
IF Output
AF Output
AFC
Mute Input
Mute Attenuation Adjust
GND
Bypass
Bypass
IF Input
.953 (24.1)
.127 (3.2)
.257
(6.5)
.334
(8.48)
1
16
.125 (3.17)
.059 (1.5)
.118 (3.0)