LA1837M_06 Datasheet, PDF (1/9 Pages) Sanyo Semicon Device – Single-Chip AM/FM Tuner IC for Home Stereo Systems

Ordering number : EN8271
LA1837M
Monolithic Linear IC
Single-Chip AM/FM Tuner IC for
Home Stereo Systems
Overview
The LA1837M is a single-chip AM/FM tuner IC that provides AM and FM IF and multiplex decoding circuits for
electronic tuning and was developed for use in home stereo systems. It provides both SD and IF counting techniques for
optimal implementation of automatic station selection.
Features
• On-chip MPX VCO circuit (no external components required).
• Adjacent channel interference rejection function (third order and fifth order).
• Supports both the SD and IF counting technique (built-in SD speedup function).
• The AM and FM SD sensitivity can be set independently.
• The AM and FM output levels can be set independently.
• Improved basic FM reception performance.
Functions
• AM: RF amplifier, mixer, oscillator, IF amplifier, detector, AGC, oscillator buffer, S-meter, narrow band SD, IF buffer
• FM IF: IF amplifier, quadrature detector, S-meter, SD, S curve detection, IF buffer output
• Multiplex stereo decoding: PLL stereo decoder, stereo indicator, forced monaural, VCO stop function, post amplifier,
audio muting, adjacent channel interference rejection function
Specifications
Maximum Ratings at Ta = 25°C
Parameter
Symbol
Maximum supply voltage
Allowable power dissipation
VCC max
Pd max
Ta≤70°C*
Operating temperature
Topr
Storage temperature
Tstg
*: Mounting board: 114.3×76.1×1.6mm glass epoxy board
Conditions
Ratings
Unit
12
V
550
mW
-20 to +70
°C
-40 to +125
°C
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 using any 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.
92706 / O3105 MS OT B8-3807 No.8271-1/9