LA1805

Manufacturer Part NumberLA1805
DescriptionFM/AM-IF/MPX tuner system for radio-cassette recorder, music center
ManufacturerSanyo Semiconductor Corporation
LA1805 datasheet
 


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Ordering number : EN2887C
Monolithic Linear IC
LA1805
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 (35dB 48dB) and its dependence on freerunning frequency (Sep - f F 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
Any and all SANYO Semiconductor 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 Semiconductor representative
nearest you before usingany SANYO Semiconductor products described or contained herein in such
applications.
SANYO Semiconductor 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 Semiconductor
products described or contained herein.
TOKYO OFFICE Tokyo Bldg., 1-10, 1 Chome, Ueno, Taito-ku, TOKYO, 110-8534 JAPAN
LA1805
SANYO Semiconductors
Symbol
Conditions
V CC max
Pins 3, 7, 8, 11, 20, 21
I CC max
Pins 3+20+21
I LED
Pins 7, 8
I 23
Pin 23
Pd max
Ta 70 C
Topr
Tstg
80906 / 12506 SY IM / 12798HA (KT) / D0994JN / 4030MO / N148YT, TS
DATA SHEET
Ratings
Unit
9
V
50
mA
20
mA
0.1
mA
500
mW
--20 to +70
C
--40 to +125
C
No.2887-1/14

LA1805 Summary of contents