TDA7468D13TR STMicroelectronics, TDA7468D13TR Datasheet - Page 7
TDA7468D13TR
Manufacturer Part Number
TDA7468D13TR
Description
IC PROCESSOR AUDIO DGTL 28-SOIC
Manufacturer
STMicroelectronics
Type
Audio Processorr
Datasheet
1.TDA7468D13TR.pdf
(23 pages)
Specifications of TDA7468D13TR
Applications
Hi-Fi Systems
Mounting Type
Surface Mount
Package / Case
28-SOIC (7.5mm Width)
Lead Free Status / RoHS Status
Lead free / RoHS Compliant
Other names
497-8870-2
TDA7468D13TR
TDA7468D13TR
Available stocks
Company
Part Number
Manufacturer
Quantity
Price
Part Number:
TDA7468D13TR
Manufacturer:
ST
Quantity:
20 000
3
The first and the last stages are volume control blocks. The control range is 0 to -63dB (mute) with 1dB
step resolution for this first one, 0 to 24dB (mute) with 8dB step resolution for the last one.
The very high resolution allows the implementation of systems free from any noisy acoustical effect.
The TDA7468D audioprocessor provides 2 bands tones control.
3.1 Bass, Stages
The Bass cell has an internal resistor R
Several filter types can be implemented, connecting external components to the Bass IN and OUT pins.
The fig.5 refers to basic T Type Bandpass Filter starting from the filter component values (R1 internal and
R2,C1,C2 external) the centre frequency Fc, the gain Av at max. boost and the filter Q factor are computed
as follows:
Viceversa, once F
3.2 Treble Stage
The treble stage is a high pass filter whose time constant is fixed by an internal resistor (25KΩ typical) and
an external capacitor connected between treble pins and ground.
3.3 CREF
The suggested 10µF reference capacitor (CREF) value can be reduced to 4.7µF if the application requires
faster power ON.
Figure 5.
APPLICATION SUGGESTIONS
C
, A
V
, and R
C1
i
=
internal value are fixed, the external components values will be:
----------------------------------------- -
2 π F
R2
⋅
F
A
C
V
⋅
A
i
=
Q
V
=
= 44KΩ typical.
=
C
C
IN
–
---------------------------------------------------------------------- -
2 π C1 F
-----------------------------------------------------------------
2 π
=
⋅
1
R2 C2
--------------------------------------------------------------- -
1
⋅
R
⋅
------------------------------------------------- -
i
R2 C1
⋅
R1 R2 C1 C2
⋅
Ri internal
R2 C1
⋅
Q
A
R1 R2 C1 C2
+
⋅
V
⋅
R2 C1
–
⋅
+
C
R
1
+
1
D95AU313
⋅
2
R2 C2
⋅
R2 C2
–
(
A
Q
OUT
⋅
C2
+
C
V
⋅
2
2
Ri C1
–
=
1
⋅
) Q
----------------------------- -
A
⋅
V
Q
–
2
1
⋅
C1
–
Q
2
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