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