LC75412E Datasheet | SANYO

Ordering number : ENN7053 CMOS IC LC75412E, 75412W Electronic Volume Controller for Car Audio Systems Overview The LC75412E and 75412W are electronic volume controllers that enable control of volume, balance, fader, bass/treble, loudness, input switching, and input gain using only a small number of external ponents. Features - On-chip buffer amplifier cuts down number of external ponents - Low switching noise generated by on-chip switch through use of silicon gate CMOS process, for low switching noise when there is no signal - Low switching noise when there is a signal due to use of on-chip zero-cross switching circuit - On-chip 1/2 VDD reference voltage circuit - Controls performed with serial input (CCB) Functions - Volume: 0 d B to - 79 d B in 1-d B steps, and - ∞ (81 positions) Balance function with separate L/R control - Fader: rear output or front output can be attenuated across 16 positions (in 1-d B steps from 0 d B to - 2 d B, 2-d B steps from - 2 d B to - 20 d B, 10-d B steps from - 20 d B to - 30 d B, and - 45 d B, - 60 d B, - ∞) - Bass/treble: Each band can be controlled in 2-d B steps from ±0 d B to ±18 d B. - Input gain: 0 d B to +18.75 d B (1.25-d B steps) amplification is possible for the input signal. - Input switching: Six input signals can be selected for Left and for Right (five are singleended inputs and one is a differential input.) - Loudness: A tap is output from the - 32 d B position of a volume control resistor ladder. A loudness function can be implemented by connecting an external RC...