LA1835

Home Stereo Single-Chip Tuner IC with Electronic Tuning Support

Overview

The is an AM, FM IF and MPX single-chip tuner IC that supports electronic tuning. It was developed specifically for use in home stereo products and is optimal for products with auto-seek systems, since it combines SD and IF counting in its auto-seek implementation.

Furthermore, since the FM detector and MPX VCO circuits are adjustment free, adoption of the LA1835 can reduce the number of adjustment steps in the production line.

Features

• Significant reduction in the number of manufacturing adjustment steps

  FM detector: Adjustment free using a ceramic discriminator

  MPX VCO: Adjustment free using a ceramic resonator

• Tuning indicator output provided. This pin can also be used as a narrow band stop signal and as a muting drive output.

• Adjustable FM stop sensitivity and bandwidth

• Built-in AM local oscillator buffer

• Support for AM low band cut control

• Adjustable AM stop sensitivity