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Sanyo Electric Components Datasheet

LA1805 Datasheet

AM / FM-IF / MPX Tuner System

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LA1805 pdf
Ordering number : EN2887C
LA1805
LA1805
Monolithic Linear IC
AM / FM-IF / MPX Tuner System for
Radio-Casette Recorders, Music Centers
Overview
The LA1805 is a characteristics-improved version of the LA1810, with the same pin assignment and package as
those of the LA1810. Improvements are made on the following point:
Separation (35dB48dB) and its dependence on freerunning frequency (Sep - fF Characteristic on page 5).
FM main distortion (0.8%0.45%).
AM detection output (approximately 5dB increased).
The constants on five external parts are changed as shown on page 11.
Functions
FM-IF: IF amp, quadrature detector, soft muting, tuning indicator.
MPX: PLL stereo decoder, stereo indicator, forced monaural, VCO stop.
AM: RF amp, MIX, OSC (with ALC), IF amp, detector, AGC, tuning indicator.
Features
FM / AM / MPX functions contained on a single chip.
Minimum number of external parts required.
On-chip FM muting function.
High sensitivity.
Less carrier leak of MPX.
Specifications
Maximum Ratings at Ta=25°C, See specified Test Circuit.
Parameter
Maximum supply voltage
Maximum supply current
Flow-in current (Indicator drive current)
Flow-out current
Allowable power dissipation
Operating temperature
Storage temperature
Symbol
VCC max
ICC max
ILED
I23
Pd max
Topr
Tstg
Conditions
Pins 3, 7, 8, 11, 20, 21
Pins 3+20+21
Pins 7, 8
Pin 23
Ta70°C
Ratings
9
50
20
0.1
500
--20 to +70
--40 to +125
Unit
V
mA
mA
mA
mW
°C
°C
Any and all SANYO products described or contained herein do not have specifications that can handle
applications that require extremely high levels of reliability, such as life-support systems, aircraft's
control systems, or other applications whose failure can be reasonably expected to result in serious
physical and/or material damage. Consult with your SANYO representative nearest you before using
any SANYO products described or contained herein in such applications.
SANYO assumes no responsibility for equipment failures that result from using products at values that
exceed, even momentarily, rated values (such as maximum ratings, operating condition ranges, or other
parameters) listed in products specifications of any and all SANYO products described or contained
herein.
SANYO Electric Co.,Ltd. Semiconductor Company
TOKYO OFFICE Tokyo Bldg., 1-10, 1 Chome, Ueno, Taito-ku, TOKYO, 110-8534 JAPAN
12506 SY IM / 12798HA (KT) / D0994JN / 4030MO / N148YT, TS No.2887-1/14


Sanyo Electric Components Datasheet

LA1805 Datasheet

AM / FM-IF / MPX Tuner System

No Preview Available !

LA1805 pdf
LA1805
Operating Conditions at Ta=25°C
Parameter
Symbol
Conditions
Ratings
Unit
Recommended operating voltage
VCC
4.5 V
Operating voltage range
VCC op
Note: The FM output level forms an N curve (LA1805) and an S curve (LA1806).
3.0 to 8.0
V
LA1805: N curve (for US band)
LA1806: S curve (for Japanese band). Your desired output level can be set by varying the output resistance.
Operating Characteristics at Ta=25°C, VCC=4.5V, See specified Test Circuit.
Parameter
Symbol
Conditions
[FM characteristics (Mono): fc=10.7MHz, fm=1kHz]
Quiescent current
ICCO
--3dB sensitivity
--3dBL.S.
Demodulation output
Channel balance
VO
C.B.
Total harmonic distortion
THD
Signal to noise ratio
S/N
No input
Referenced to VIN=100dBµ, 100%, down 3dB
VIN=100dBµ, 100% mod.
VIN=100dBµ, 100% mod.
VIN=100dBµ, 100% mod.
VIN=100dBµ, 100% mod.
LED ON sensitivity
VLED
IL=1mA
[FM characteristics (Stereo): fc=10.7MHz, fm=1kHz, L+R=90%, pilot=10%, VIN=100dBµ]
Separation
Sep
Stereo distortion
THD (Main)
LED ON level
LED OFF level
[AM characteristics: fc=1000kHz, fm=1kHz]
VLED-on
VLED-off
Quiescent current
Demodulation output
Signal to noise ratio
Total harmonic distortion
ICCO
VO1
VO2
S / N1
S / N2
THD1
THD2
No input
VIN=23dBµ, 30% mod.
VIN=80dBµ, 30% mod.
VIN=23dBµ, 30% mod.
VIN=80dBµ, 30% mod.
VIN=80dBµ, 30% mod.
VIN=100dBµ, 30% mod.
LED on sensitivity
VLED
IL=1mA
Note: Be fully careful of dielectric breakdown.
Ratings
min typ max
Unit
13
28
140 205
00
0.45
70 80
23 33
20 mA
35 dBµ
280 mV
1.5 dB
1.2 %
dB
43 dBµ
32 48
0.45
2.4 3.9
2.7
dB
1.2 %
5.4 %
%
9.5 14.5 mA
27 50 90 mV
70 113 173 mV
17 21
dB
50 55
dB
0.45
1.2 %
0.6 1.5 %
16 24 32 dBµ
Package Dimensions
unit : mm
3067B
21.0
24 13
1
0.9
12
0.95
(0.71)
1.78
0.48 SANYO : DIP24S(300mil)
No.2887-2/14


Part Number LA1805
Description AM / FM-IF / MPX Tuner System
Maker Sanyo
Total Page 14 Pages
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