TDA7438D013TR STMicroelectronics, TDA7438D013TR Datasheet

IC PROCESSOR AUDIO DGTL 28-SOIC

TDA7438D013TR

Manufacturer Part Number
TDA7438D013TR
Description
IC PROCESSOR AUDIO DGTL 28-SOIC
Manufacturer
STMicroelectronics
Type
Audio Processorr
Datasheet

Specifications of TDA7438D013TR

Applications
Automotive Systems
Mounting Type
Surface Mount
Package / Case
28-SOIC (7.5mm Width)
Lead Free Status / RoHS Status
Lead free / RoHS Compliant

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1
2
The TDA7438 is a volume tone (bass, middle and
treble) balance (Left/Right) processor for quality
audio applications in car-radio and Hi-Fi systems.
Figure 2. Block Diagram
June 2004
INPUT MULTIPLEXER
– 3 STEREO INPUTS
– SELECTABLE INPUT GAIN FOR OPTIMAL
ONE STEREO OUTPUT
TREBLE, MIDDLE AND BASS CONTROL IN
2.0dB STEPS
VOLUME CONTROL IN 1.0dB STEPS
TWO SPEAKER ATTENUATORS:
– TWO INDEPENDENT SPEAKER CONTROL
– -INDEPENDENT MUTE FUNCTION
ALL FUNCTION ARE PROGRAMMABLE VIA
SERIAL BUS
FEATURES
ADAPTATION TO DIFFERENT SOURCES
IN 1.0dB STEPS FOR BALANCE FACILITY
DESCRIPTION
R-IN1
R-IN2
R-IN3
L-IN1
L-IN2
L-IN3
3
4
5
2
1
28
DIGITALLY CONTROLLED AUDIO PROCESSOR
100K
100K
100K
100K
100K
100K
INPUT MULTIPLEXER
+ GAIN
2dB STEP
0/30dB
G
G
MUXOUTR INR
MUXOUTL
6
8
VOLUME
VOLUME
INL
7
9
TREBLE(R)
TREBLE(L)
TREBLE
TREBLE
18
19
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 1. Package
Table 1. Order Codes
I
2
CBUS DECODER + LATCHES
MIN(L)
MIN(R) MOUT(R)
MIDDLE
MIDDLE
17
10
TDA7438D013TR
R
R
MOUT(L)
M
M
Part Number
TDA7438D
TDA7438
16
11
SO28
BIN(R)
BIN(L)
BASS
BASS
14
12
R
R
B
B
BOUT(L)
BOUT(R)
15
13
SPKR ATT
SPKR ATT
SUPPLY
RIGHT
CREF
LEFT
V
REF
23
THREE BANDS
27
21
22
20
26
24
25
D96AU488A
LOUT
SCL
SDA
DIG_GND
ROUT
V
AGND
TDA7438
S
Tape & Reel
Package
DIP28
DIP28
SO28
REV. 7
1/19

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TDA7438D013TR Summary of contents

Page 1

... INPUT MULTIPLEXER June 2004 Figure 1. Package Table 1. Order Codes Part Number TDA7438D013TR 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 ...

Page 2

TDA7438 Table 2. Absolute Maximum Ratings Symbol V Operating Supply Voltage S T Operating Ambient Temperature amb T Storage Temperature Range stg Figure 3. Pin Connection Table 3. Thermal Data Symbol R Thermal Resistance Junction-pins th j-pins Table 4. Quick ...

Page 3

Table 5. Electrical Characteristcs: (refer to the test circuit Tamb = 25° 9V, RL= 10K , RG = 600 , all controls flat (G = 0dB), unless otherwise specified Symbol Parameter SUPPLY V Supply Voltage S I Supply ...

Page 4

TDA7438 Table 5 (continued) Symbol Parameter SPEAKER ATTENUATORS C Control Range RANGE S Step Resolution STEP E Attenuation Set Error A E Tracking Error Step DC A Mute Attenuation mute AUDIO OUTPUTS V Clipping Level CLIP R ...

Page 5

Figure 4. Test Circuit L-IN1 3 0.47 F 100K L-IN2 4 0.47 F 100K L-IN3 5 0.47 F 100K R-IN1 2 0.47 F 100K R-IN2 1 0.47 F 100K R-IN3 28 0.47 F 100K INPUT MULTIPLEXER 3 APPLICATION SUGGESTIONS The ...

Page 6

TDA7438 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: ...

Page 7

Figure 8. Channel separation vs. frequency Figure 9. Bass response Figure 10. Treble response Figure 11. Middle response Figure 12. Typical tone response TDA7438 7/19 ...

Page 8

TDA7438 BUS INTERFACE Data transmission from microprocessor to the TDA7438 and vice versa takes place through the 2 wires I C BUS interface, consisting of the two lines SDA and SCL (pull-up resistors to positive supply ...

Page 9

Figure 15. Acknowledge on the I SCL SDA START 5 SOFTWARE SPECIFICATION Interface Protocol The interface protocol comprises: A start condition (S) A chip address byte, containing the TDA7438 address A subaddress bytes A sequence of data (N byte + ...

Page 10

TDA7438 Figure 18. . CHIP ADDRESS MSB LSB D96AU422 Table 6. POWER ON RESET CONDITION INPUT SELECTION INPUT GAIN VOLUME BASS MIDDLE TREBLE SPEAKER 6 DATA BYTES Address = 88 HEX (ADDR:OPEN). ...

Page 11

Table 8. INPUT GAIN SELECTION MSB GAIN = 0 to 30dB Table 9. VOLUME SELECTION MSB VOLUME = 0 to ...

Page 12

TDA7438 Table 10. BASS SELECTION MSB Table 11. MIDDLE SELECTION MSB 12/ ...

Page 13

Table 12. TREBLE SELECTION MSB Table 13. SPEAKER ATTENUATE SELECTION MSB SPEAKER ...

Page 14

TDA7438 Figure 20. PINS 20K CREF 20K Figure 21. PINS: 26 ROUT LOUT 20 A D96AU434 Figure 22. PINS 100K V REF ...

Page 15

Figure 26. PINS: 10 25K MOUT(L) MOUT(R) Figure 27. PINS: 12 BIN(L) BIN(R) Figure 28. PINS: 13 44K BOUT(L) BOUT(R) Figure 29. PINS: 18 BIN(L) D96AU431 BIN(R) Figure ...

Page 16

TDA7438 Figure 32. DIP28 Mechanical Data & Package Dimensions mm DIM. MIN. TYP. MAX. a1 0.63 b 0.45 b1 0.23 0.31 b2 1.27 D 37.34 E 15.2 16.68 e 2.54 e3 33.02 F 14.1 I 4.445 L 3.3 16/19 inch ...

Page 17

Figure 33. SO28 Mechanical Data & Package Dimensions mm DIM. MIN. TYP. MAX. A 2.65 a1 0.1 0.3 b 0.35 0.49 b1 0.23 0. (typ.) D 17.7 18 10.65 e 1.27 e3 16.51 F ...

Page 18

TDA7438 Table 14. Revision History Date Revision January 2004 June 2004 18/19 6 First Issue in EDOCS DMS 7 Changed the Style-sheet in compliance to the new “Corporate Technical Pubblications Design Guide” Description of Changes ...

Page 19

... No license is granted by implication or otherwise under any patent or patent rights of STMicroelectronics. Specifications mentioned in this publication are subject to change without notice. This publication supersedes and replaces all information previously supplied. STMicroelectronics products are not authorized for use as critical components in life support devices or systems without express written approval of STMicroelectronics ...

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