LA1245

Ordering number : EN737F

AM Electronic Tuner

Monolithic Linear IC

SANYO Electric Co.,Ltd. Semiconductor Bussiness Headquarters

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

63097HA (KOTO)/33194HO/N050JK/8044KI,TS3173KI/O020KI No.737-1/11

Overview

LA1245 is a high performance IC to be used as an AM

electronic tuner. It provides an automatic search-stop

signal, local oscillator buffer-output, and the low level

local oscillation, as well as providing all other functions

required of an AM tuner. Moreover, the stable local

oscillation from LW to SW facilitates the use of many

band.

Functions

• RF amplifier

• MIX

• OSC (with ALC) • Detection

• IF amplifier

• AGC

• Local oscillation buffer-output

• Signal meter driving output (also used as an automatic

search stop-signal)

• etc.

Package Dimensions

unit : mm

3021B-DIP20S

[LA1245]

SANYO: DIP20S

Features

• Narrow-band signal meter

: Available as an automatic search-stop signal (also available as a wide-band signal

meter). Signal meter output=1/2 frequency ±1.5kHz typ.

• Local oscillation buffer-output

: Facilitates the design of electronic tuning systems and frequency representation.

• OSC (with ALC)

: The oscillation output is stabilized at a low level (350 mVrms) for a varactor

diode, and tracking error is minimized.

• RF amplifier

: Excellent in usable sensitivity by incorporating low-noise transistors in cascode

circuit (45dB/m typ).

• MIX

: Double balanced differential MIX prevents the influence of spurious radiation and

IF interferences (IF interference = 85dB typ).

• Low noise

: Excellent in S/N for intermediate input (57dB typ).

: Allows little gain fluctuation and little distoriton fluctuation (8 to 16 V).

• Low shock noise

: Able to decrease the shock noise by selecting AGC time constant when changing