Overview

The LA3460M is a high performance car stereo tuner IC that includes an FM noise canceller and a stereo multiplex demodulator.

Features

[Noise Canceller Block]

? Improved ignition noise rejection during medium to weak field reception Adoption of a new noise AGC circuit Optimized gate time

? High audio quality design with malfunction prevention in the high frequency band and for overmodulated signals Improved dynamic range low-pass and high-pass filters

[Multiplex Block]

? High signal-to-noise ratio and low distortion (stereo S/N ratio: 79 dB, THD: 0.1 )

? Good high frequency band separation (50 dB at 1 kHz and 30 dB at 10 kHz)

? Adoption of a PLL circuit with an adjustment-free VCO (456 kHz ceramic resonator)

? Improved pilot cancellation level (25 to 30 dB) using a new cancellation circuit

? Built-in 114 kHz and 190 kHz anti-birdie filters

? Adoption of new SNC characteristics to reduce multipath noise

? Reduced printed circuit board space requirements due to the adoption of a mini-flat package (MFP-24)

Functions

[Noise Canceller Block]

? Built-in low- and high-pass filters

? Noise AGC

? Pilot signal compensation function

[Multiplex Block]

? Adjustment-free VCO (456 kHz)

? Level follower type pilot canceller

? SNC (stereo noise control)

? HCC (high cut control)

? Stereo indicator driver

? VCO oscillator stop function