Datasheet

Description of the audio processor TDA7419
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4 Description of the audio processor
4.1 Audio processor features
● Input Multiplexer
– QD / SE: quasi-differential stereo inputs, with selectable single-ended mode
– SE1: stereo single-ended input
– SE2: stereo single-ended input
– SE3 / AC2IN: stereo single-ended input / HPF filter input
– In-Gain 0 to 15dB, 1dB steps
– internal offset-cancellation (AutoZero)
– separate second source-selector
● Mixing stage
– mixable to front speaker-outputs
● Loudness
–2
nd
order frequency response
– programmable center frequency (400Hz/800Hz/2400Hz)
– 15 dB with 1 dB steps
– selectable low and high frequency boost
– selectable flat-mode (constant attenuation)
● Volume
– +15 dB to -79 dB with 1 dB step resolution
– soft-step control with programmable blend times
● Bass
–2
nd
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 15 dB range with 1 dB resolution
● Middle
–2
nd
order frequency response
– center frequency programmable in 4 steps (500Hz/1KHz/1.5KHz/2.5KHz)
– Q programmable 0.5/0.75/1.0/1.25
– DC gain programmable
– -15 to 15dB range with 1dB resolution
● Treble
–2
nd
order frequency response
– center frequency programmable in 4 steps (10KHz/12.5KHz/15KHz/17.5KHz)
– -15 to 15dB range with 1dB resolution
● Spectrum analyzer
– seven bandpass filters
–2
nd
order frequency response