Overview
The LA3410 is a multiplex demodulator IC designed for FM stereo tuner. It features the VCO non-adjusting function that eliminates the need to adjust the free-running frequency of VCO.

Applications
• Home stereos, portable hi-fi sets.

Functions
• VCO non-adjusting function.
• PLL MPX stereo demodulator.
• Gain variable type post amplifier.
• VCO stop function.
• Separation adjust function.

FEATUREs
• Non-adjusting VCO : Eliminates the need to adjust the free-running frequency.
• Good temperature characteristic of VCO : ±0.1% typ. for ±50°C change.
• Low distortion at high frequencies in stereo main channel (0.06% at f=10kHz) (Non-adjusting PLL makes the capture range narrower, leading to improvement in beat distortion at high frequencies in stereo main channel.)
• Low distortion : 1kHz 300mV input mono 0.025% typ. main 0.02% typ.
• High S/N : 91dB typ. (mono 300mV input, LPF). 92dB typ. (mono 300mV input, IHF BPF).
• High voltage gain : Approximately 8.5dB (at standard constants).
• Wide dynamic range : Distortion 1.0% at mono 800mV, 1kHz input.
• Good ripple rejection of power supply : 34dB typ.