TDA7461N データシートの表示（PDF） - STMicroelectronics

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TDA7461N

CAR RADIO SIGNAL PROCESSOR

STMicroelectronics 

TDA7461N

Bass & Treble Attenuation

MSB

LSB

BASS & TREBLE ATTENUATION

D7 D6 D5 D4 D3 D2 D1 D0

Treble Steps

0

0

0

0 -14dB

0

0

0

1 -12dB

:

:

:

::

0

1

1

0 -2dB

0

1

1

1

0dB

1

1

1

1

0dB

1

1

1

0 +2dB

:

:

:

::

1

0

0

1 +12dB

1

0

0

0 +14dB

0

0

0

0

0

0

0

1

:

:

:

:

0

1

1

0

0

1

1

1

1

1

1

1

1

1

1

0

:

:

:

:

1

0

0

1

1

0

0

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

Treble

0

0 Center Frequency = 10 KHz

0

1 Center Frequency = 12.5 KHz

1

0 Center Frequency = 15 KHz

1

1 Center Frequency = 17.5 KHz

0

0

0

1

1

0

1

1

1

1

1

1

0

0

0

1

1

0

1

1

0

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

AC Coupling (*)

0

For External Connection

1

Internally connected

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

0001110

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

25/32

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