|
|
PDF TDA7448 Data sheet ( Hoja de datos )
| Número de pieza | TDA7448 | |
| Descripción | 6 CHANNEL VOLUME CONTROLLER | |
| Fabricantes | ST Microelectronics | |
| Logotipo |  |
|
Hay una vista previa y un enlace de descarga de TDA7448 (archivo pdf) en la parte inferior de esta página. Total 13 Páginas | ||
|
No Preview Available !
TDA7448
6 CHANNEL VOLUME CONTROLLER
PRODUCT PREVIEW
s 6 CHANNEL INPUTS
s 6 CHANNEL OUTPUTS
s VOLUME ATTENUATION RANGE OF
0 TO -79dB
s VOLUME CONTROL IN 1.0dB STEPS
s 6 CHANNEL INDEPENDENT CONTROL
s ALL FUNCTION ARE PROGRAMMABLE VIA
SERIAL BUS
SO20
ORDERING NUMBER: TDA7448
DESCRIPTIO
The TDA7448 is a 6 channel volume controller for
quality audio applications in Multi-Channels Audio
Systems
Thanks to the used BIPOLAR/CMOS Technology,
Low Distortion, Low Noise and DC stepping are ob-
tained.
BLOCK DIAGRAM
2
IN1
VOLUME
50K
19
IN2
VOLUME
50K
3
IN3
VOLUME
50K
18
IN4
VOLUME
50K
4
IN5
VOLUME
50K
17
IN6
VOLUME
50K
GND
CREF
11
20
SUPPLY
1
VS
I2C BUS
DECODER
7
OUT1
14
OUT2
6
OUT3
15
OUT4
5
OUT5
16
OUT6
10
SCL
9
SDA
12
ADDR
D02AU1396
December 2002
This is preliminary information on a new product now in development. Details are subject to change without notice.
1/13
1 page  
TDA7448
I2C BUS INTERFACE
Data transmission from microprocessor to the TDA7448 and vice versa takes place through the 2 wires I2C BUS in-
terface, consisting of the two lines SDA and SCL (pull-up resistors to positive supply voltage must be connected).
Data Validity
As shown in fig. 1, the data on the SDA line must be stable during the high period of the clock. The HIGH and
LOW state of the data line can only change when the clock signal on the SCL line is LOW.
Start and Stop Conditions
As shown in fig. 2 a start condition is a HIGH to LOW transition of the SDA line while SCL is HIGH. The stop
condition is a LOW to HIGH transition of the SDA line while SCL is HIGH.
Byte Format
Every byte transferred on the SDA line must contain 8 bits. Each byte must be followed by an acknowledge bit.
The MSB is transferred first.
Acknowledge
The master (µP) puts a resistive HIGH level on the SDA line during the acknowledge clock pulse (see fig. 5). The
peripheral (audio processor) that acknowledges has to pull-down (LOW) the SDA line during this clock pulse.
The audio processor which has been addressed has to generate an acknowledge after the reception of each
byte, otherwise the SDA line remains at the HIGH level during the ninth clock pulse time. In this case the master
transmitter can generate the STOP information in order to abort the transfer.
Transmission without Acknowledge
Avoiding to detect the acknowledge of the audio processor, the µP can use a simpler transmission: simply it
waits one clock without checking the slave acknowledging, and sends the new data.
This approach of course is less protected from misworking.
Figure 5. Data Validity on the I2CBUS
SDA
SCL
DATA LINE
STABLE, DATA
VALID
CHANGE
DATA
ALLOWED
D99AU1031
Figure 6. Timing Diagram of I2CBUS
SCL
SDA
START
D99AU1032
I2CBUS
STOP
Figure 7. Acknowledge on the I2CBUS
SCL 1 2 3 7 8 9
SDA
START
MSB
D99AU1033
ACKNOWLEDGMENT
FROM RECEIVER
5/13
5 Page 
Figure 16. PC Board (Solder side)
TDA7448
11/13
11 Page | ||
| Páginas | Total 13 Páginas | |
| PDF Descargar | [ Datasheet TDA7448.PDF ] | |
Hoja de datos destacado
| Número de pieza | Descripción | Fabricantes |
| TDA7440 | TONE CONTROL DIGITALLY CONTROLLED AUDIO PROCESSOR | ST Microelectronics |
| TDA7440D | TONE CONTROL DIGITALLY CONTROLLED AUDIO PROCESSOR | ST Microelectronics |
| TDA7442 | TONE CONTROL AND SURROUND DIGITALLY CONTROLLED AUDIO PROCESSOR | ST Microelectronics |
| TDA7442D | TONE CONTROL AND SURROUND DIGITALLY CONTROLLED AUDIO PROCESSOR | ST Microelectronics |
| Número de pieza | Descripción | Fabricantes |
| SLA6805M | High Voltage 3 phase Motor Driver IC. |
 Sanken |
| SDC1742 | 12- and 14-Bit Hybrid Synchro / Resolver-to-Digital Converters. |
 Analog Devices |
|
DataSheet.es es una pagina web que funciona como un repositorio de manuales o hoja de datos de muchos de los productos más populares, |
| DataSheet.es | 2020 | Privacy Policy | Contacto | Buscar |