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Sanyo Electric Components Datasheet

LA1140 Datasheet

FM IF System

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LA1140 pdf
Ordering number: EN 729E
Monalithic Linear IC
LA1140
FM IF System for Car Radio
Overview
The LA1140 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
3020A-SIP16
[LA1140]
Functions
. IF amplification/limiter
. Quadrature detector
. AF preamplifier
. AFC output
. Signal meter output
. AGC output
. Muting bandwidth
. Muting under weak signal strength
SANYO : SIP16
Features
. Versatile muting
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 40 dB.
c) Input signal strength level which actuates the muting
. circuit can be set freely.
High limiting sensitivity (25 dBµ typ. with muting off)
provides a fine quieting characteristic.
. High S/N (78 dB typ.)
. Low distortion (0.05% typ.) avaiable if used with
. double-tuned circuits.
Good AMR (63 dB typ. with 6 stages of differential IF
. amplifiers).
Signal meter drive output proportional to the input signal
strength in dB (suitable to control multiplex IC LA3370).
. Clamped (±VBE) AFC output, bandwidth adjustable.
. Delayed AGC output for front end circuit.
. Small space factor due to single-ended package employed.
. 3 mm pitch of pin terminals permitting ease-to-write PC
board pattern.
SANYO Electric Co.,Ltd. Semiconductor Bussiness Headquarters
TOKYO OFFICE Tokyo Bldg., 1-10, 1 Chome, Ueno, Taito-ku, TOKYO, 110 JAPAN
93097HA(II)/D0994JN/N257TA/4105MW/3233KI,TS O090KI No.729-1/15


Sanyo Electric Components Datasheet

LA1140 Datasheet

FM IF System

No Preview Available !

LA1140 pdf
LA1140
Specifications
Maximum Ratings at Ta = 25°C
Parameter
Maximum supply voltage
Maximum supply current
Allowable power
dissipation
Input voltage
Flow-in current
Flow-out current
Operating temperature
Storage temperature
Symbol
VCC max
ICC max
Pd max
VIN
I2
I3
I6
I5
I13
I14
I15
I16
Topr
Tstg
Pin 12
Pin 12
Ta = 25°C
Ta = 70°C
Pin 1 to 2
Pin 2
Pin 3
Pin 6
Pin 5
Pin 13
Pin 14
Pin 15
Pin 16
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 Conditions at Ta = 25°C
Parameter
Recommended supply
voltage
Operating voltage range
Symbol
VCC
VCC op
Conditions
Ratings
8
7.5 to 16
Unit
V
V
Operating Characteristics at Ta = 25°C, VCC = 8 V, f = 10.7 MHz, See specified Test Circuit
Parameter
Quiescent current
Current drain
Demodulation output
Total harmonic distortion
Signal-to-noise ratio
Input limiting voltage
Muting sensitivity
Muting attenuation (1)
Muting attenuation (2)
Muting bandwidth
AM rejection ratio
Muting drive output
Muting drive output
Signal meter output (1)
Signal meter output (2)
Signal meter output (3)
Signal meter output (4)
AGC output (1)
AGC output (2)
Offset voltage (1)
Offset voltage (2)
Symbol
ICCO
ICC
VO
THD
S/N
VIN (lim)
VIN (Mute)
Mute (ACC)
Mute (ACC)
BW (Mute)
AMR
V14-0
V14-100
V15-0
V15-50
V15-70
V15-100
V16-0
V16-100
V7-13
V8-13
Conditions
Quiescent
VIN = 100 dBµ
VIN = 100 dBµ, 400 Hz 100% mod.
VIN = 100 dBµ, 400 Hz 100% mod.
VIN = 100 dBµ, 400 Hz 100% mod.
VO: 3 dB down, 400 Hz 100% mod.
V14 = 2.0 V
V6 = 2.0 V (22 k), VIN = 100 dBµ,
400 Hz 100% mod.
V6 = 5.0 V (22 k), VIN = 100 dBµ,
400 Hz 100% mod.
VIN = 100 dBµ, V14 = 2.0 V
VIN = 100 dBµ, FM 400 Hz
100% mod., AM 1 kHz 30% mod.
Quiescent
VIN = 100 dBµ
Quiescent
VIN = 50 dBµ
VIN = 70 dBµ
VIN = 100 dBµ
Quiescent
VIN = 100 dBµ
Quiescent, pin 7 to 13
Quiescent, pin 8 to 13
min
15
20
200
72
22
typ
21
25
260
0.05
78
25
26
10 15
max Unit
27 mA
30 mA
320 mVrms
0.2 %
dB
29 dBµ
32 dBµ
20 dB
24
140
50
3.5
0
0
0.8
1.6
4.5
3.5
0
–0.25
–0.5
28
210
63
4.2
0
0.1
1.4
2.4
5.3
4.1
0.02
0
0
32
370
5.0
0.3
0.3
2.0
3.2
6.0
4.5
0.3
+0.25
+0.5
dB
kHz
dB
V
V
V
V
V
V
V
V
V
V
No. 729-2/15


Part Number LA1140
Description FM IF System
Maker Sanyo
Total Page 15 Pages
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