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Sanyo Electric Components Datasheet

LA1143 Datasheet

FM IF System

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LA1143 pdf
Ordering number : EN1140D
Monolithic Linear IC
LA1143
FM IF System for Car Radios
Overview
The LA1143 is an IF system IC designed for FM car stereo
receivers. It features versatile muting characteristics and
allows receiver designers to realize the muting
performance according to their design concept. Since the
muting characteristics can be varied with a switch or a
semi-fixed resistor, DX-Local switching will be
accomplished with ease.
Package Dimensions
unit: mm
3006B-DIP16
[LA1143]
Functions
• IF amplification/limiter
• AF preamplifier
• Signal meter output
• Muting at detuning
• Quadrature detector
• AFC output
• AGC output
• Muting at small input
SANYO: DIP16
Features
1. 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 variations can be set at any given value.
b) Maximum muting attenuation can be selected to be approximately 6 to 40dB.
c) Input signal strength level which actuates the muting circuit can be set freely.
2. High limiting sensitivity (25 dBµ typ. with muting off) provides a good quieting characteristic.
3. High S/N (78dB typ.)
4. Low distortion (0.05% typ.) available, if used with double-tuned circuits.
5. Good AMR (63dB with 6 stages of differential IF amplifiers).
6. Signal meter drive output proportional to the input signal strength in dB (suitable to control multiplex IC LA3373).
7. Clamped (±VBE) AFC output, bandwidth adjustable.
8. Delayed AGC output for front end circuit.
Equivalent Circuit Block Diagram
SANYO Electric Co.,Ltd. Semiconductor Bussiness Headquarters
TOKYO OFFICE Tokyo Bldg., 1-10, 1 Chome, Ueno, Taito-ku, TOKYO, 110 JAPAN
91297HA (KT)/D157KI/2126KI/5085MW/D142KI, TS No.1140-1/5


Sanyo Electric Components Datasheet

LA1143 Datasheet

FM IF System

No Preview Available !

LA1143 pdf
LA1143
Specifications
Maximum Ratings at Ta=25°C
Parameter
Symbol
Maximum supply voltage
Maximum supply current
Allowable power dissipation
VCC max Pin 12
ICC max Pin 12
Pd max Ta=25°C
Ta=70°C
Input voltage
Flow-in current
Flow-out current
Operating temperature
VIN
I2
I3
I6
I5
I13
I14
I15
I16
Topr
Pin 1 to 2
Pin 2
Pin 3
Pin 6
Pin 5
Pin 13
Pin 14
Pin 15
Pin 16
Storage temperature
Tstg
Conditions
Ratings
16
40
640
460
±1
±0.2
±0.2
2
1
2
2
1
1
–20 to +70
–40 to +125
Unit
V
mA
mW
mW
Vp-p
mA
mA
mA
mA
mA
mA
mA
mA
°C
°C
Operating Condition at Ta=25°C
Parameter
Symbol
Recommended supply voltage VCC
Operating voltage range
VCC op
Conditions
Ratings
8
7.5 to 16
Unit
V
V
Operating Characteristics at Ta=25°C, VCC=8V, f=10.7MHz, See specified Test Circuit.
Parameter
Symbol
Conditions
Ratings
min typ max
Unit
Quiescent current
Current drain
ICCO
ICC
Quiescent
VIN=100dBµ
15 21 27 mA
20 25 30 mA
Demodulation output
VO
VIN=100dBµ,400Hz, 100% mod.
200 260 320 mVrms
Total harmonic distortion
Signal to noise ratio
THD
S/N
VIN=100dBµ,400Hz, 100% mod.
VIN=100dBµ,400Hz, 100% mod.
0.05
72 78
0.2 %
dB
Input limiting voltage
Muting sensitivity
Muting attenuation (1)
VIN(lim) VO : 3dB down, 400Hz 100% mod.
VIN(mute) V14=2.0V
Mute(ACC) V6=2.0V (22k), VIN=100dBµ,
400Hz 100% mod.
25 29 dBµ
22 26 35 dBµ
10 15 20 dB
Muting attenuation (2)
Mute(ACC) V6=5.0V (22k), VIN=100dBµ,
400Hz 100% mod.
24 28 32 dB
Muting bandwidth
BW(mute) VIN=100dBµ, V14=2.0V
140 210 370 kHz
AM rejection ratio
AMR
VIN=100dBµ, FM 400Hz 100% mod.
AM 1kHz 30% mod.
50
63
dB
Muting drive output
Muting drive output
V14-0
V14-100
Quiescent
VIN=100dBµ
3.5 4.2 5.0 V
0 0 0.3 V
Signal meter output (1)
Signal meter output (2)
Signal meter output (3)
V15-0
V15-50
V15-70
Quiescent
VIN=50dBµ
VIN=70dBµ
0 0.1 0.3 V
0.8 1.4 2.0 V
1.6 2.4 3.2 V
Signal meter output (4)
AGC output (1)
V15-100
V16-0
VIN=100dBµ
Quiescent
4.5 5.3 6.0 V
3.5 4.1 4.5 V
AGC output (2)
Offset voltage (1)
V16-100
V7-13
VIN=100dBµ
Quiescent, pin 7 to 13
0
–0.25
0.02 0.3
0 +0.25
V
V
Offset voltage (2)
V8-13
Quiescent, pin 8 to 13
–0.5 0 +0.5 V
No.1140-2/5


Part Number LA1143
Description FM IF System
Manufacturer Sanyo
Total Page 5 Pages
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