Apraksts

• Features
•  Input multiplexer
• – QD1: quasi-differential stereo inputs
• – SE1: stereo single-ended input
• – SE2: stereo single-ended input
• – SE3: stereo single-ended input
• – FD full-differential or quasi-differential input
•  Loudness
• – 2nd order frequency response
• – Programmable center frequency
• (400 Hz / 800 Hz / 2400 Hz)
• – 15 dB with 1 dB steps
• – Selectable high frequency boost
• – Selectable flat-mode (constant attenuation)
•  Volume
• – +23 dB to -31 dB with 1 dB step resolution
• – Soft-step control with programmable blend
• times
•  Bass
• – 2nd 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 dB to 15 dB range with 1 dB resolution
•  Middle
• – 2nd order frequency response
• – Center frequency programmable in 4 steps
• (500 Hz / 1 kHz / 1.5 kHz / 2.5 kHz)
• – Q programmable 0.75/1.0/1.25
• – -15 dB to 15 dB range with 1 dB resolution
•  Treble
• – 2nd order frequency response
• (10 kHz / 12.5 kHz / 15 kHz / 17.5 kHz)
• – Center frequency programmable in 4 steps
• (10 kHz / 12.5 kHz / 15 kHz / 17.5 kHz)
• – -15 dB to 15 dB with 1 dB resolution
•  Speaker
• – 4 independent soft-step speaker controls
• – +15 dB to -79 dB with 1 dB steps
• – Direct mute
•  Subwoofer
• – 2nd order low pass filter with programmable
• cut off frequency (55 Hz / 85 Hz / 120 Hz /
• 160 Hz)
• – 2 independent soft-step level control,
• +15 dB to –79 dB with 1 dB steps
•  Mute functions
• – Direct mute
• – Digitally controlled soft-mute with 4
• programmable mute-times
• (0.48 ms/0.96 ms/8 ms/16 ms)
•  Offset detection
• – Offset voltage detection circuit for on-board
• power amplifier failure diagnosis
• Description
• The TDA7718B is a high performance signal
• processor specifically designed for car radio
• applications. The device includes a high
• performance audioprocessor with fully integrated
• audio filters and new soft-step architecture. The
• digital control allows programming in a wide range
• of filter characteristics.

Parametri

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