TDA7439D ST Microelectronics, TDA7439D Datasheet

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TDA7439D

Manufacturer Part Number
TDA7439D
Description
THREE BANDS DIGITALLY CONTROLLED AUDIO PROCESSOR
Manufacturer
ST Microelectronics
Datasheet

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DESCRIPTION
The TDA7439 is a volume tone (bass, middle and
treble) balance (Left/Right) processor for quality
audio applications in car-radio and Hi-Fi systems.
Selectable input gain is provided. Control of all
the functions is accomplished by serial bus.
BLOCK DIAGRAM (TDA7439)
April 1999
- 4 STEREO INPUTS
- SELECTABLE INPUT GAIN FOR OPTIMAL
2.0dB STEPS
- TWO INDEPENDENT SPEAKER CONTROL
- INDEPENDENT MUTE FUNCTION
SERIAL BUS
INPUT MULTIPLEXER
ONE STEREO OUTPUT
TREBLE, MIDDLE AND BASS CONTROL IN
VOLUME CONTROL IN 1.0dB STEPS
TWO SPEAKER ATTENUATORS:
ALL FUNCTION ARE PROGRAMMABLE VIA
ADAPTATION TO DIFFERENT SOURCES
IN 1.0dB STEPS FOR BALANCE FACILITY
R-IN1
R-IN2
R-IN3
R-IN4
L-IN1
L-IN2
L-IN3
L-IN4
11
12
13
14
10
9
8
7
100K
100K
100K
100K
100K
100K
100K
100K
DIGITALLY CONTROLLED AUDIO PROCESSOR
INPUT MULTIPLEXER
+ GAIN
2dB STEP
0/30dB
G
G
MUXOUTL
MUXOUTR INR
15
17
VOLUME
VOLUME
INL
16
18
TREBLE(R)
TREBLE(L)
TREBLE
TREBLE
27
28
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
I
2
CBUS DECODER + LATCHES
MIN(R) MOUT(R)
MIN(L)
MIDDLE
MIDDLE
ORDERING NUMBERS: TDA7439 (SDIP30)
26
19
R
R
MOUT(L)
M
M
SDIP30
25
20
BIN(R)
BIN(L)
BASS
BASS
23
21
R
R
B
B
BOUT(L)
BOUT(R)
24
22
SO28
SPKR ATT
SPKR ATT
THREE BANDS
SUPPLY
RIGHT
CREF
LEFT
V
REF
2
TDA7439B (DIP28)
TDA7439D (SO28)
TDA7439
30
29
6
1
5
3
4
D95AU342B
DIP28
LOUT
SCL
SDA
DIG_GND
ROUT
V
AGND
S
1/19

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TDA7439D Summary of contents

Page 1

... CBUS DECODER + LATCHES VOLUME TREBLE MIDDLE BASS MUXOUTR INR TREBLE(R) MIN(R) MOUT(R) BIN(R) TDA7439 THREE BANDS DIP28 SO28 TDA7439B (DIP28) TDA7439D (SO28) BOUT( SPKR ATT LOUT LEFT 30 SCL 1 SDA 29 DIG_GND 5 SPKR ATT ROUT RIGHT V REF ...

Page 2

... TDA7439 BLOCK DIAGRAM (TDA7439B/TDA7439D) 4 L-IN1 100K 5 L-IN2 100K 6 G L-IN3 100K 7 L-IN4 100K 0/30dB 2dB STEP 3 R-IN1 100K 2 R-IN2 100K G 1 R-IN3 100K 28 R-IN4 INPUT MULTIPLEXER 100K + GAIN PIN CONNECTION (SDIP30) SDA CREF V AGND ROUT LOUT R-IN4 R-IN3 R-IN2 R-IN1 L-IN1 ...

Page 3

PIN CONNECTION (DIP28/SO28) R_IN3 R_IN2 R_IN1 L_IN1 L_IN2 L_IN3 L_IN4 MUXOUTL MUXOUTR MIN(R) MOUT(R) BIN(R) BOUT(R) BIN(L) ABSOLUTE MAXIMUM RATINGS Symbol V Operating Supply Voltage S T Operating Ambient Temperature amb T Storage Temperature Range stg THERMAL DATA Symbol R ...

Page 4

TDA7439 ELECTRICAL CHARACTERISTICS (refer to the test circuit 600 , all controls flat (G = 0dB), unless otherwise specified) G Symbol Parameter SUPPLY V Supply Voltage S I Supply Current S SVR Ripple Rejection INPUT STAGE R ...

Page 5

ELECTRICAL CHARACTERISTICS (continued.) Symbol Parameter AUDIO OUTPUTS V Clipping Level CLIP R Output Load Resistance L R Output Impedance Voltage Level DC GENERAL E Output Noise NO E Total Tracking Error t S/N Signal to Noise Ratio ...

Page 6

TDA7439 APPLICATION SUGGESTIONS The first and the last stages are volume control blocks. The control range -47dB (mute) for the first one -79dB (mute) for the last one. Both of them have 1dB step resolution. ...

Page 7

Figure 4: Channel separation vs. frequency Figure 6: Middle response R = 25k 15nF (MIN 22nF (MOUT 2.7k Figure 8: Typical tone response Figure 5: Bass response R = 44k ...

Page 8

TDA7439 BUS INTERFACE Data transmission from microprocessor to the TDA7439 and vice versa takes place through the 2 2 wires I C BUS interface, consisting of the two lines SDA and SCL (pull-up resistors to positive supply ...

Page 9

SOFTWARE SPECIFICATION Interface Protocol The interface protocol comprises: A start condition (S) A chip address byte, containing the TDA7439 CHIP ADDRESS MSB LSB ACK D96AU420 ACK = Acknowledge S = Start ...

Page 10

TDA7439 POWER ON RESET CONDITION INPUT SELECTION INPUT GAIN VOLUME BASS MIDDLE TREBLE SPEAKER DATA BYTES Address = 88 HEX (ADDR:OPEN). FUNCTION SELECTION: First byte (subaddress) MSB ...

Page 11

DATA BYTES (continued) INPUT GAIN SELECTION MSB GAIN = 0 to 30dB VOLUME SELECTION MSB ...

Page 12

TDA7439 DATA BYTES (continued) BASS SELECTION MSB MIDDLE SELECTION MSB 12/19 LSB ...

Page 13

DATA BYTES (continued) TREBLE SELECTION MSB SPEAKER ATTENUATE SELECTION MSB ...

Page 14

TDA7439 PINS 20K CREF 20K D96AU430 PINS 10, 11, 12, 13 100K V REF PINS: 16 INL INR 33K V REF 14/19 PINS ...

Page 15

PINS: 19 25K MIN(L) MIN(R) PINS: 22 44K BOUT(L) BOUT(R) PINS SCL D96AU424 PINS: 21, BIN(L) D96AU431 BIN(R) PINS: 27 TREBLE(L) TREBLE(R) ...

Page 16

TDA7439 mm DIM. MIN. TYP. MAX. MIN. A 5.08 A1 0.51 0.020 A2 3.05 3.81 4.57 0.12 B 0.36 0.46 0.56 0.014 B1 0.76 0.99 1.40 0.030 C 0.20 0.25 0.36 0.008 D 27.43 27.94 28.45 1.08 E 10.16 10.41 ...

Page 17

DIM. MIN. TYP. MAX. MIN. TYP. a1 0.63 0.025 b 0.45 0.018 b1 0.23 0.31 0.009 b2 1.27 0.050 D 37.34 E 15.2 16.68 0.598 e 2.54 0.100 e3 33.02 1.300 F 14.1 I 4.445 0.175 L 3.3 ...

Page 18

TDA7439 mm DIM. MIN. TYP. MAX. MIN. A 2.65 a1 0.1 0.3 0.004 b 0.35 0.49 0.014 b1 0.23 0.32 0.009 C 0 (typ.) D 17.7 18.1 0.697 E 10 10.65 0.394 e 1.27 e3 16.51 F 7.4 ...

Page 19

Information furnished is believed to be accurate and reliable. However, STMicroelectronics assumes no responsibility for the consequences of use of such information nor for any infringement of patents or other rights of third parties which may result from its use. ...

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