TDA7461N Datasheet, PDF (25/31 Pages) STMicroelectronics – CAR RADIO SIGNAL PROCESSOR

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
0 00 11 10
(*) For deeper information see application examples fig. 24 and fig. 25.
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