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 free running frequency (Sep – fF Characteristic on page 4).

• 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 10.

  

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.