Ordering number : EN5888

40999RM (OT) No. 5888-1/9

Overview

The LA1838 is designed for use in home stereo systems

and is a single-chip tuner IC that provides electronic

tuning functions for AM, FM IF, and MPX reception. It is

optimal for use in products that adopt an automatic tuning

system based on an IF count.

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

(signal detection), S-curve detection, IF buffer

output

• MPX:

PLL stereo decoder, stereo display, forced

monaural, VCO stop, post amplifier, audio

muting, adjacent channel interference rejection

function

Features

• Integrated MPX VCO (External components are no

longer required.)

• Built-in adjacent channel interference rejection function

(third and fifth order)

• Adjustment-free FM detector circuit (Uses a ceramic

discriminator.)

• The AM and FM SD sensitivities can be set

independently.

• The AM and FM output levels can be set independently.

• Improved useable AM sensitivity and strong field

distortion characteristics.

Package Dimensions

unit: mm

3061-DIP30S

1

15

30

16

1.15

1.78

27.2

0.48

0.95

SANYO: DIP30S

[LA1838]

LA1838

SANYO Electric Co.,Ltd. Semiconductor Company

TOKYO OFFICE Tokyo Bldg., 1-10, 1 Chome, Ueno, Taito-ku, TOKYO, 110-8534 JAPAN

Single-Chip Home Stereo IC with Electronic

Tuning Support

Monolithic linear IC

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.

-40

0

300

200

100

400

-20

500

550

600

20

60

100

040

80

Ambient temperature, Ta —

°C

Pd max - Ta