Bass & Treble Attenuation

MSB

LSB

BASS & TREBLE ATTENUATION

D7

D6

D5

D4

D3

D2

D1

D0

0

0

:

0

0

1

1

:

1

1

0

0

:

1

1

1

1

:

0

0

0

0

:

1

1

1

1

:

0

0

0

1

:

0

1

1

0

:

1

0

Treble Steps

-14dB

-12dB

:

-2dB

0dB

0dB

+2dB

:

+12dB

+14dB

0

0

:

0

0

1

1

:

1

1

0

0

:

1

1

1

1

:

0

0

0

0

:

1

1

1

1

:

0

0

0

1

:

0

1

1

0

:

1

0

Bass Steps

-14dB

-12dB

:

-2dB

0dB

0dB

+2dB

:

+12dB

+14dB

For example 12dB Treble and -8dB Bass give the following DATA BYTE : 0 0 1 1 1 0 0 1.

Bass & Treble Filter Characteristics

MSB

LSB

BASS & TREBLE FILTER

D7

D6

D5

D4

D3

D2

D1

D0

0

0

1

1

0

1

0

1

Treble

Center Frequency = 10 KHz

Center Frequency = 12.5 KHz

Center Frequency = 15 KHz

Center Frequency = 17.5 KHz

0

1

1

0

0

1

1

1

0

1

0

1

0

0

1

1

1

0

1

0

1

1

Bass

Center Frequency = 60 Hz

Center Frequency = 70 Hz

Center Frequency = 80 Hz

Center Frequency = 100Hz

Center Frequency = 150Hz

Quality factor = 1

Quality factor = 1.25

Quality factor = 1.5

Quality factor = 2

DC-Gain = 0dB

DC-Gain =

±4.4dB

0

1

AC Coupling (*)

For External Connection

Internally connected

For example Treble center frequency = 15kHz, Bass center frequency = 100Hz, Bass Q = 1 and DC = 0dB give the following DATA BYTE: 1

0 0 0 1 1 1 0

(*) For deeper information see application examples fig. 24 and fig. 25.

TDA7461N

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