LA1805
No.2887-1/14
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 - 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
Symbol
Conditions
Ratings
Unit
Maximum supply voltage
VCC max
Pins 3, 7, 8, 11, 20, 21
9
V
Maximum supply current
ICC max
Pins 3+20+21
50
mA
Flow-in current (Indicator drive current)
ILED
Pins 7, 8
20
mA
Flow-out current
I23
Pin 23
0.1
mA
Allowable power dissipation
Pd max
Ta≤70°C
500
mW
Operating temperature
Topr
--20 to +70
°C
Storage temperature
Tstg
--40 to +125
°C
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80906 / 12506 SY IM / 12798HA (KT) / D0994JN / 4030MO / N148YT, TS
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.
LA1805
Monolithic Linear IC
AM / FM-IF / MPX Tuner System for
Radio-Casette Recorders, Music Centers
Ordering number : EN2887C