TDA7417
数据手册.pdf汽车收音机音频处理器 Car radio audio processor
Description
The is an high performance signal processor specifically designed for car radio applications with fully integrated audio filters. The digital control allows a full programming of the audioprocessor in a wide range of filter characteristics.
By using BICMOS-process low distortion and low noise are obtained.
Features
■ Input Multiplexer
– QD: quasi-differential stereo inputs
– FD: full-differential stereo inputs
– Mono: Mono input
– SE1: stereo single-ended input
– SE2: stereo single-ended input
– In-Gain 0 to 15dB, 1dB step
– internal offset-cancellation AutoZero
■ IN/OUT control
– Selectable full-differential stereo inputs or Bass output
■ Loudness
– 2nd order frequency response
– programmable center frequency 400Hz/800Hz/2400Hz
– 15dB with 1dB steps
– soft-step control with programmable blend times
– selectable low & high frequency boost
■ Volume
– +15dB to -79dB with 1dB step resolution
– soft-step control with programmable blend times
– multi-step control
■ Bass
– 2nd order frequency response
– center frequency programmable in 4 steps 60Hz/80Hz/100Hz/200Hz
– Q programmable 1.0/1.25/1.5/2.0
– DC gain programmable
– -15 to 15dB with 1dB resolution
– soft-step control with programmable blend times
■ Treble
– 2nd order frequency response
– center frequency programmable in 4 steps 10KHz/12.5KHz/15KHz/17.5KHz
– -15 to 15dB with 1dB resolution
■ High pass
– 2nd order frequency response
– center frequency programmable in 3 steps 80Hz/120Hz/160Hz
■ Speaker
– independent soft step speaker controls, +15dB to -79dB with 1dB steps
– Independent programmable mix input with 50% mixing ratio for front speakers
– direct mute
– multi-step control
■ Mute Functions
– digitally controlled SoftMute with 3 programmable mute-times 0.48ms/0.96ms/123ms