Ordering number : EN5688C
Monolithic Linear IC
LA1837
Overview
For Home Stereo IC with Electronic Tuning Support
Single-Chip IC
The LA1837 is a single-chip AM/FM IF and MPX IC that supports electronic tuning and was developed for use in home
stereo systems. It is optimal for use in automatic station selection systems that use the SD and IF counting techniques.
Features
•
On-chip MPX VCO (no external components required).
•
Adjacent channel interference rejection function (third and fifth order).
•
Supports both the SD and the IF counting techniques.
•
The AM and FM SD sensitivities can be set independently.
•
The AM and FM output levels can be set independently.
•
Improved AM practical sensitivity and high-input distortion characteristics.
Functions
•
AM :
•
FM-IF :
•
MPX :
RF amplifier, mixer, oscillator, IF amplifier, detector AGC, oscillator buffer, S-meter, narrowband SD,
IF buffer
IF amplifier, quadrature detector, S-meter, Scurve detector, IF buffer output
PLL stereo decoder, stereo display, forced mono, VCO stop, post amplifier, audio muting, adjacent channel
interference rejection function
Specifications
Maximum Ratings
at Ta = 25°C
Parameter
Maximum supply voltage
Allowable power dissipation
Operating temperature
Storage temperature
Symbol
VCC max
Pd max
Topr
Tstg
Ta
≤
70°C
Conditions
Ratings
12
550
-20 to +70
-40 to +125
Unit
V
mW
°C
°C
Any and all SANYO Semiconductor Co.,Ltd. products described or contained herein are, with regard to
"standard application", intended for the use as general electronics equipment (home appliances, AV equipment,
communication device, office equipment, industrial equipment etc.). The products mentioned herein shall not be
intended for use for any "special application" (medical equipment whose purpose is to sustain life, aerospace
instrument, nuclear control device, burning appliances, transportation machine, traffic signal system, safety
equipment etc.) that shall require extremely high level of reliability and can directly threaten human lives in case
of failure or malfunction of the product or may cause harm to human bodies, nor shall they grant any guarantee
thereof. If you should intend to use our products for applications outside the standard applications of our
customer who is considering such use and/or outside the scope of our intended standard applications, please
consult with us prior to the intended use. If there is no consultation or inquiry before the intended use, our
customer shall be solely responsible for the use.
Specifications of any and all SANYO Semiconductor Co.,Ltd. products described or contained herein stipulate
the performance, characteristics, and functions of the described products in the independent state, and are not
guarantees of the performance, characteristics, and functions of the described products as mounted in the
customer
'
s products or equipment. To verify symptoms and states that cannot be evaluated in an independent
device, the customer should always evaluate and test devices mounted in the customer
'
s products or
equipment.
70109 SY / 62409 MS PC/82097HA(OT) No.5688-1/9
SANYO [ SANYO SEMICON DEVICE ]
