TDA7418 is a 3-band car audio processor with input multiplexer, loudness, volume, bass, middle, treble, speaker, subwoofer etc.
The TDA7418 is a high-performance audio processor designed for car audio applications. It features fully integrated 3-band filters (Bass, Middle, Treble) that can be digitally programmed to process signals at audible frequencies. The device includes a high-performance input multiplexer supporting pseudo differential and single-ended stereo inputs.
Key features include programmable input gain, a loudness function with selectable center frequencies, and independent volume controls for speakers and a subwoofer. The processor also offers soft-step volume control, direct mute, and digitally controlled SoftMute with programmable timing. All characteristics are controlled via an I2C bus interface.
| Supply voltage | 8 to 10 V |
|---|---|
| Operating temperature range | -40 to +85 °C |
| Supply current | 18 to 32 mA |
| Input resistance (single-ended) | 70 to 130 kΩ |
| Input separation | 80 to 100 dB |
| Input gain range | -0.5 to 16 dB |
| Input gain resolution | 1 dB |
The device operates within a temperature range of -40 to +85 °C.
The input gain is adjustable from 0 to 15 dB with 1 dB steps.
The programmable center frequencies for the loudness function are 400 Hz, 800 Hz, and 2400 Hz.
The SoftMute function supports three programmable mute times: 0.48 ms, 0.96 ms, and 123 ms.