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PDF TDA7468 Data sheet ( Hoja de datos )
| Número de pieza | TDA7468 | |
| Descripción | TWO BANDS DIGITALLY CONTROLLED AUDIO PROCESSOR | |
| Fabricantes | STMicroelectronics | |
| Logotipo |  |
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Hay una vista previa y un enlace de descarga de TDA7468 (archivo pdf) en la parte inferior de esta página. Total 23 Páginas | ||
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TDA7468
TWO BANDS DIGITALLY CONTROLLED
AUDIO PROCESSOR WITH BASS ALC SURROUND
1 FEATURES
INPUT MULTIPLEXER
– 4 STEREO INPUTS
– SELECTABLE INPUT GAIN FOR OPTIMAL
ADAPTATION TO DIFFERENT SOURCES
ONE STEREO OUTPUT
BASS ALC
TREBLE AND BASS CONTROL IN 2.0dB
STEPS
VOLUME CONTROL IN 1.0dB STEPS
TWO SPEAKER ATTENUATORS:
– TWO INDEPENDENT SPEAKER CONTROL
IN 1.0dB STEPS FOR BALANCE FACILITY
– INDEPENDENT MUTE FUNCTION
ALL FUNCTION ARE PROGRAMMABLE VIA
SERIAL BUS
EXTERNALLY ADJUSTABLE SURROUND
2 DESCRIPTION
The TDA7468D is a volume tone (bass and treble)
balance (Left/Right) processor for quality audio
Figure 1. Package
SO28
Table 1. Order Codes
Part Number
TDA7468D
TDA7468D13TR
Package
SO28
Tape & Reel
applications in Hi-Fi systems.
Selectable input gain is provided. Control of all the
functions is accomplished by serial bus.
The AC signal setting is obtained by resistor net-
works and switches combined with operational
amplifiers.
Thanks to the used BIPOLAR/CMOS Technology,
Low Distortion, Low Noise and DC stepping are
obtained
Figure 2. PIN CONNECTION (Top view)
April 2010
VS
MIC
IN1_L
IN2_L
IN3_L
IN4_L
MUX_L
IS_L
TREBLE_L
BASSI_L
BASSO_L
OUT_L
DGND
SCL
1 28
2 27
3 26
4 25
5 24
6 23
7 22
8 21
9 20
10 19
11 18
12 17
13 16
14 15
D99AU1057
GND
CREF
IN1_R
IN2_R
IN3_R
IN4_R
MUX_R
IS_R
TREBLE_R
BASSI_R
BASSO_R
OUT_R
ALC
SDA
Rev. 4
1/23
1 page  
TDA7468
ELECTRICAL CHARACTERISTICS (continua)
(refer to the test circuit Tamb = 25°C, VS = 9V, f = 1KHz all controls flat (G = 0dB), unless otherwise
specified)
Symbol
Parameter
Test Condition
Min. Typ. Max. Unit
BASS CONTROL
Gb Control Range
Max. Boost/cut
±12.0 ±14.0 ±16.0 dB
BSTEP Step Resolution
RB Internal Feedback Resistance
BASS ALC CONTROL
1 2 3 dB
33 44 55 KΩ
Rattack1
Rattack2
Rattack3
Rattack4
Thresh1
Attack Time Resistor 1
Attack Time Resistor 2
Attack Time Resistor 3
Attack Time Resistor 4
Threshold 1
12.5
25
50
100
700
KΩ
KΩ
KΩ
KΩ
mVrms
Thresh2 Threshold 2
485 mVrms
Thresh3 Threshold 3
320 mVrms
Thresh4 Threshold 4
170 mVrms
TREBLE CONTROL
Gt Control Range
Max. Boost/cut
+13.0 +14.0 +15.0 dB
TSTEP Step Resolution
Rt Internal Resistance
AUDIO OUTPUTS
1 2 3 dB
25 KΩ
VOCL Clipping Level
RL Output Load Resistance
VOUT DC Voltage Level
GENERAL
THD = 0.3%
2 2.5
2
4.5
Vrms
KΩ
V
ENO Output Noise
BW = 20Hz to 20KHz;
All gains 0dB;
output muted
5 µV
flat 10 15 µV
S/N Signal to Noise Ratio
SC Channel Separation Left/Right
d Distortion
SC Channel Separation left/right
Total Tracking Error
All gains 0dB; VO = 1Vrms ;
AV = 0; VI = 0.1Vrms ;
AV = 0; VI = 1Vrms ;
100
90
0.1
0.01
90
01
dB
dB
%
%
dB
dB
BUS INPUT
VIL Input Low Voltage
VIH Input High Voltage
IIN Input Current
VO Output Voltage (ACK)
VIN = 0.4V
IO = 1.6mA
1V
2.5 V
-5 5 µA
0.4 0.8
V
5/23
5 Page 
TDA7468
Table 8. INPUT GAIN SELECTION
MSB
D7 D6 D5 D4
GAIN = 0 to 30dB
Table 9. SURROUND
MSB
D7
D6
D5
D4
00
00
01
01
10
10
11
11
1
0
LSB
D3 D2 D1 D0
000
001
010
011
100
101
110
111
INPUT GAIN
2dB STEPS
0dB
2dB
4dB
6dB
8dB
10dB
12dB
14dB
LSB
SURROUND
D3 D2 D1 D0
SURROUND MODE
1 ON
0 OFF
GAIN
00
0dB
01
6dB
10
9dB
11
12dB
MIXING
0 inverting : 100%
1 inverting :50%
0 inverting : 25%
1 0%
0 non-inverting : 100%
1 non-inverting : 75%
0 non-inverting : 50%
1 mute
BUFFER GAIN
0
6dB
11/23
11 Page | ||
| Páginas | Total 23 Páginas | |
| PDF Descargar | [ Datasheet TDA7468.PDF ] | |
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