Overview

The LA1833N/NM is an AM/FM IF and MPX system-on chip IC that supports electronic tuning for home stereo systems. It is optimal for use in auto-seek systems that use SD (station detect) and IF counting in parallel.

Features

• Improvements over the LA1832

  — The MPX VCO circuit has been integrated on the same IC (no ceramic element required)

  — Built-in adjacent channel interference reduction function (114 kHz, 190 kHz)

  — Built-in pilot canceler function (19 kHz)

  — AM and FM output levels can be set independently

  — Improved FM reception characteristics (IF beating improved)

• Other features

  — Pin arrangement nearly identical to that of the LA1832

  — AM coil specifications can be the same as those used for the LA1832.

  — ST operating dynamic range improved over that of the LA1833

  — FM total harmonic distortion detuning characteristics and signal-to-noise ratio improved over those of the LA1833