TDA7419 3 band car audio processor Features 4 stereo inputs Soft-step volume Bass, middle, treble and loudness Direct mute and soft-mute Four independent speaker outputs Sub woofer output Soft-step speaker/subwoofer control SO-28 7 bands spectrum analyzer Digital control: 2 I C bus interface Description The TDA7419 is a high performance signal The digital control allows programming in a wide processor specifically designed for car radio range of filter characteristics. By the use of applications. The device includes a high BICMOS-process and linear signal processing performance audioprocessor with fully integrated low distortion and low noise are obtained. audio filters. Table 1. Device summary Order code Package Packing TDA7419 SO-28 Tube TDA7419TR SO-28 Tape and reel September 2013 Rev 7 1/40 www.st.com 1Contents TDA7419 Contents 1 Block diagram 6 2 Pin description . 7 3 Electrical specifications 9 3.1 Supply 9 3.2 Thermal data . 9 3.3 Absolute maximum ratings . 9 3.4 Electrical characteristics 10 4 Description of the audio processor 14 4.1 Audio processor features . 14 4.2 Input stages . 15 4.2.1 Quasi-differential stereo input (QD) 15 4.2.2 Single-ended stereo input (SE1, SE2, SE3/AC2IN) 15 4.3 AutoZero 16 4.3.1 AutoZero remain 16 4.4 Loudness . 16 4.4.1 Attenuation . 16 4.4.2 Peak frequency . 17 4.4.3 Low and high frequency boost 18 4.4.4 Flat mode 18 4.5 Soft-mute . 18 4.5.1 Soft-step volume 19 4.6 Bass . 19 4.6.1 Attenuation . 20 4.6.2 Center frequency 21 4.6.3 Quality factors 21 4.6.4 DC mode 22 4.7 Middle 22 4.7.1 Attenuation . 22 4.7.2 Center frequency 23 4.7.3 Quality factors 23 2/40