September 2013 Rev 4 1/29
1
TDA7418
3 band car audio processor
Features
• Input multiplexer
– PD/SE4: pseudo differential stereo input,
programmable as single-ended input
– SE1: stereo single-end input
– SE2: stereo single-end input
– SE3: stereo single-end input
– Input gain adjust from 0 to 15dB with 1dB
steps
– Internal offset-cancellation (AutoZero)
• Loudness
– Second order frequency response
– Programmable center frequency
(400 Hz / 800 Hz / 2400 Hz)
– 15dB with 1dB steps
– Selectable low and high frequency boost
– Selectable flat-mode (constant attenuation)
•Volume
– +15dB to -79dB with 1dB step resolution
– Soft-step control with programmable blend
times
•Bass
– Second order frequency response
– Center frequency programmable in 4 steps
(60 Hz / 80 Hz / 100 Hz / 200 Hz)
– Q programmable 1.0/1.25/1.5/2.0
– DC gain programmable
– -15 to 15dB range with 1dB resolution
•Middle
– Second order frequency response
– Center frequency programmable in 4 steps
(500 Hz / 1 kHz / 1.5 kHz / 2.5 kHz)
– Q programmable 0.5/0.75/1.0/1.25
– -15 to 15dB range with 1dB resolution
•Treble
– Second order frequency response
– Center frequency programmable in 4 steps
(10 kHz / 12.5 kHz / 15 kHz / 17.5 kHz)
– -15 to 15dB range with 1dB resolution
• Speaker
– 4 independent soft step speaker controls,
+15dB to -79dB with 1dB steps direct mute
• Subwoofer
– Single-ended mono output
– Independent soft step level control, +15dB
to -79dB with 1dB steps
• Mute functions
– Direct mute
– Digitally controlled SoftMute with 3
programmable mute-times
(0.48 ms / 0.96 ms /123 ms)
Description
The TDA7418 includes a high performance audio
processor with fully integrated 3-Band filters to
process signals at audible frequencies. The digital
control allows a full programming of the
audioprocessor and filters characteristics.
Table 1. Device summary
Order code Temp range, C Package Packing
TDA7418 -40 to +85 SO20 Tube
TDA7418TR -40 to +85 SO20 Tape and reel
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