Datasheet TDA7433D Datasheet (SGS Thomson Microelectronics)



BASIC FUNCTION AUDIO PROCESSOR

TWO STEREO AND ONE MONO INPUTS
CONTROLLED

MUTE FUNCTION (SOFTWARE AND HARD­WARE)

VOLUMECONTROLIN 1dB STEP
FOURSPEAKER ATTENUATORS:

– Independentattenuationcontrol
– Independentmute function

ALL FUNCTIONS PROGRAMMABLE VIA

2

I

CBUS

TDA7433

DESCRIPTION

The TDA7433is a volume, tone (bass and treble)
balance (Left/Right) processor for quality audio
applicationsin car radioand Hi-Fisystems.

Control is accomplished by serial bus microproc­essor interface.

The AC signal setting is obtained by resistor net­works and switches combined with operational
amplifiers.

BLOCK DIAGRAM

100nF 100nF

BINL BOUTL TRL

10 9 11

6

IN1_L

3

IN2_L

MONO IN/MUTE

MUX

4

VOL BASS TREBLE

S BUS DECODER + LATCHES

SO20

ORDERING NUMBER: TDA7433D

Thanks to the advanced BIPOLAR/CMOS Tech­nology, the external components have been re­duced.

4.7K

2.7nF

SPKR

ATT

SPKR

ATT

16

14

18
19

LEFT FRONT

LEFT REAR

SCL
SDA

November 1999

IN2_R
IN1_R

15

SPKR

ATT

SPKR

ATT

13

D95AU354A

RIGHT FRONT

RIGHT REAR

2
5

17

S

MUX

SUPPLYV

20

GND

VOL BASS TREBLE

18712

BINR BOUTR TRRCREF

100nF 100nF

4.7K

2.7nF

1/10

TDA7433

ABSOLUTE MAXIMUM RATINGS

Symbol Parameter Value Unit

V

S

T

amb

T

stg

QUICK REFERENCEDATA

Symbol Parameter Min. Typ. Max. Unit

V

S

V

CL

THD Total Harmonic Distortion (V =1Vrms f = 1kHZ) 0.05 %

S/N Signal to Noise Ratio 102 dB

Sc Channel Separationf = 1kHz 100 dB

Operating Supply Voltage 10.2 V
Operating TemperatureRange -40 to 85 °C
Storage Temperature Range -55 to +150 °C

Supply Voltage 7 9 10.2 V
Max. Input SignalHandling 1.3 1.6 Vrms

Volume Control1dB step -79 +32 dB
Bass Control2dB step -18 +18 dB
Treble Control2dB step -14 +14 dB
Speaker Attenuators -37.5 0 dB
Mute Attenuation 100 dB

PIN CONNECTION(Top View)

MONO IN/MUTE

BOUT_R

BOUT_L TRR

CREF

IN2_R

IN2_L

2
3
4

IN1_R

IN1_L

5
6
7

BIN_R

8
9

BIN_L TRL

10

D95AU355A

20
19
18
17
16
15
14
13
12
11

GND1
SDA
SCL
V

S

OUT_LF
OUT_RF
OUT_LR
OUT_RR

THERMAL DATA

Symbol Parameter Value Unit

Thermal ResistanceJunction-pins Max. 150 °C/W

2/10

R

th j-pins

APPLICATIONDIAGRAM

TDA7433

4.7K

100nF 100nF

10 9 11

100nF

IN1_L

6

IN2_L

3

100nF

100nF

MONO/

MUTE

100nF

IN2_R

IN1_R

100nF

9V

V

S

100nF

4

2

5

V

17

S

SUPPLY

20

GND

MUX

MUX

VOL BASS TREBLE

S BUS DECODER+ LATCHES

VOL BASS TREBLE

1 8712
CREF BINR BOUTR TRR

10µF

100nF 100nF

4.7K

2.7nF

TRLBOUTLBINL

2.7nF

SPKR

ATT

SPKR

ATT

SPKR

ATT

SPKR

ATT

16

14

18
19

15

13

D95AU356A

LEFT FRONT

LEFT REAR

SCL
SDA

RIGHT FRONT

RIGHT REAR

3/10

TDA7433

ELECTRICALCHARACTERISTICS

=25°C,VS=9V, RL= 10kΩ,Rg=50Ω,

(T

amb

all variablegains = 0dB, f = 1kHz, unlessotherwisespecified.)

Symbol Parameter Test Condition Min. Typ. Max. Unit

INPUT SELECTOR

R

IN

V

CL

S

IN

A

MUTE

V

DC

MUTE AT AM INPUT (*)

V

IL

VOLUME CONTROL

G

MAX

A

MAX

A

step

E

A

E

T

V

DC

BASS CONTROL

B

RANGE

B

CUT

A

Step

R

B

TREBLE CONTROL

C

RANGE

A

step

SPEAKER ATTENUATORS

C

RANGE

A

step

A

MUTE

E

A

V

DC

AUDIO OUTPUTS

V

CLIP

G

OUT

R

L

C

L

R

OUT

VDC DC Voltage Level 3.7 4.0 4.3 V

(*) The mute function can be activatedwithout using the I2C bus by groundingthe AMinput whenAM is notselected. This causes theinput

multiplexer to select the referencevoltage instead ofan input signal.

Input Resistance 70 100 130 kΩ
Clipping Level d≤ 0.3% 1.3 1.6 Vrms
Input Separation 70 100 dB
Input Mute Attenuation 70 95 dB
Mute DC Step 0.2 10 mV

Input Low Voltage AM not selected 0.4 V

Max. Gain Note 2 30.5 32 33.5 dB
Max Attenuation 75 79 83 dB
Step Resolution 0.5 1 1.5 dB
Attenuation Set Error G = +20 to -20dB -1.0 0 +1.0 dB

G = -20 to -60dB -2 2 dB
Tracking Error G = -20 to -60dB 2 dB
DC Steps Adjacent AttenuationSteps,

0.1 4 mV

Range from 0 to -79dB

From 0dB to -79dB 0.5 10 mV

Max. Bassboost 15.5 18 20 dB
Max. Basscut -20 -18 15.5 dB
Step Resolution 1 2 3 dB
Internal Feedback Resistance 48 65 82 kΩ

Control Range ±13 ±14 ±15 dB
Step Resolution 1 2 3 dB

Control Range 36 37.5 39 dB
Step Resolution From 0 to -24dB 0.5 1 1.5 dB
Output MuteAttenuation From 0 to -24dB 70 90 dB
Attenuation Set Error 1 dB
DC Steps Adjacent AttenuationSteps 0.1 4 mV

Clipping Level d = 0.3% 2 2.5 Vrms
Output Gain(fixed) 4 dB
Output LoadResistance AC - connected 3 k

Ω

DC connectedto GND 5
Output LoadCapacitance 10 nF
Output Impedance 30 100 Ω

4/10

TDA7433

ELECTRICALCHARACTERISTICS

(continued)

Symbol Parameter Test Condition Min. Typ. Max. Unit

GENERAL

V

S

I

S

Supply Voltage 6 9 10.2 V
Supply Current 5 8 11 mA

PSRR Power SupplyRejection Ratio 65 85 dB

e

NO

Output Noise 20Hz - 20kHz ”A” - weighted

BW = 200Hz - 20kHz,flat

output muted

S/N Signal to Noise Ratio all gains= 0dB; V

d Distortion V

= 1Vrms 0.05 0.15 %

OUT

= 1Vrms 102 dB

O

4

7.0

5.5

20

Sc Channel Separation 70 80 dB
E

T

Total TrackingError AV= 0to -20dB

A

= -20to -60dB

V

0
0

1
2

BUS INPUTS

V

IL

V

IH

I

IN

V

O

Input Low Voltage 1V
Input High Voltage 3 V
Input Current VIN= 0.4V -5 +5 µA
Output Voltage

IO= 1.6mA 0.15 0.4 V
SDA Acknowledge

SOFTWARESPECIFICATION
Interface Protocol

The interfaceprotocol comprises:
– a startcondition(S)
– a chipaddress byte(the LSBbit determinesread /write transmission)
– a subaddressbyte
– a sequenceof data (N-bytes+ acknowledge)
– a stop condition (P)

µ
µV
µV

dB
dB

V

MSB

CHIP ADDRESS

LSB

MSB

SUBADDRESS

LSB MSB

DATA 1...DATA n

LSB

S 1 0 0 0 1 0 1 R/W ACK X X X I A3A2A1A0ACK DATA ACK P

ACK = Acknowledge
S = Start
P = Stop
MAX CLOCK SPEED 500kbits/s

Auto Increment

If bit I inthe subaddressbyte is set to ”1”, the autoincrementof the subaddressis enabled.

5/10

TDA7433

SUBADDRESS

(receivemode)

MSB LSB

X X X I A3A2A1A0

0
0
0
0
0
0
0

0
0
0
0
1
1
1

0
0
1
1
0
0
1

I = Autoincrement
X = Notused

DATA BYTESPECIFICATION

X = notrelevant; set to ”1” during testing

Input Selector

MSB LSB

D

D

7

D

6

D

5

D

4

D

3

D

2

0
0
0
0
1

1

0
0
1
1

X
0
1

0
1

Input selector

0

Volume

1

Bass, Treble

0

Speaker attenuator LF

1

Speaker attenuator LR

0

Speaker attenuator RF

1

Speaker attenuator RR

0

D

0

IN2

0

IN1

1

mono IN

0

no inputselected

1

mute (lowhomic)

X

non-symmetrical bass cut (note1)
symmetrical bass cut
extended bass range
standard bass range±14dB

FUNCTION

FUNCTION

For exampleto select the IN2 inputthe DataByte is: XX X X X 0 1 0.
An additionaldirect mute functionis included in the SpeakerAttenuators.

Note 1: Basscut for very low frequencies.

MSB LSB

D

D

7

0
0
0
0
0
0
0

0
0
0

D

6

0
0
0
0
1
1
1

D

5

0
0
1
1
0
0
1

D

4

0
1
0
1
0
1
0

D

3

D

2

D

1

0

+32dB
+16dB

0dB

-16dB

-32dB

-48dB

-64dB

0
0
0

0
0
0

0

0

1

0

0dB

1

-1dB

0

-2dB
0
0

Note 2:
It is not recommended to use a gain more than 20dB for system performance reason. In general, the max. gain should be limited by
software to the maximum value, which is needed forthe system.

1

1

1

1

-15dB

VOLUME

6/10

Bass, Treble

TDA7433

MSB LSB

D

D

D

D

D

D

D

7

6

5

4

3

2

D

1

0

Treble Steps

- 14dB

0

0

0

D4

Input

Selector

0

0

0

0
0
0
0
0
0
0
1
1
1
1
1
1
1
1

1

0

1

0

0

1

0

1

1

1

1

1

1

1

1

1

0

1

0

1

1

0

1

0

0

0

0

0

-12dB

1

-10dB

0

-8dB

1

-6dB

0

-4dB

1

-2dB

0

0dB

1

0dB

1

+2dB

0

+4dB

1

+6dB

0

+8dB

1

+10dB

0

+12dB

1

+14dB

0

Bass Steps
0
0
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
0
0

For example 12dB Treble and -8dB Bass give the following DATA BYTE:0 01110 0

0

0

0

0

0

0

0

0

0

0

0

0

0

1

0

1

0

1

0

1

0

1

1

1

1

1

1

1

1

0

1

0

1

0

1

0

1

0

1

0

1

0

0

1

0

0

1

1

1

0

0

1

0

0

1

1

1

1

1

0

1

1

0

0

0

1

1

0

1

1

0

0

0

0

0

1

0

1

0

0

-18dB

-16dB

-14dB

-12dB

-10dB

-8dB

-6dB

-4dB

-2dB

0dB

0dB

+2dB

+4dB

+6dB

+8dB

+10dB

+12dB

+14dB

+16dB

+18dB

normal

range

14dB

±

FUNCTION

Speaker Attenuators

MSB LSB SPEAKER ATTENUATOR

D

7

X
X

X
X
X
X
X
X
X
X

X

D

6

X
X

X
X
X
X
X
X
X
X

X

D

5

0
0

0
0
0
0
0
0
0
0

1

D

4

0
0

1
1
1
1
1
1
1
1

X

D

3

0
0

:
1
1
1
1
1
1
1
1

X

D

2

0
0

D

1

0
0

D

0

0dB

0

-1dB

1

:

-24dB

0
0
0
0
1
1
1
1

X

0
0
1
1
0
0
1
1

X

0
1
0
1
0
1
0
1

X

-25.5dB

-27dB

-28.5dB

-30dB

-32dB

-34.5dB

-37.5dB
Speaker Mute

LF,LR,RF,RR

7/10

TDA7433

Functional Description

The input selectoris able to select 2 stereo inputs
and 1 mono input (AM). The inputsare DC biased
with 100kΩ resistorsto the internal reference volt­age of 3V. The mono input can be used addition­ally as hardware mute pin. If this pin is pulled to
ground by an externaltransistor and AM is not se­lected, the input selector mutes the input (refer­ence voltage selected). The AM part is consid­ered to be switched OFF. If the output of the AM
part is not high ohmic in this condition, a series
resistor of about 20kΩ hasto be foreseen.

The volume control can be programmed from a
gain of +32dB to an attenuation of -79dB in 1dB
steps. The maximum gain should be kept as low
as possiblefor system performancereason. It has
to be limited by software to the absolute neces­sary system gain, dependingon the signal source
level and the power amplifier gain.

The bass control acts in a range from +18dB to ­18dB in 2dB steps. The filter response is deter-

mined by the external filter components. An ex­tensive simulation softwareis available in order to
supportthe design of the bass filter response with
differentfilter configurations.
The extended bass boost range of +18dB allows
the implementationof the software loudness func­tion by additionalbass and treble boost.

The treble control acts in a range of ±14dB in 2dB
steps. The external capacitor determines with the
internal resistor of 50KΩthe corner frequency of
the treble response.

The four speaker attenuatorscan be controlledin­dependentlyfrom 0 to -37.5dB, which allows the
implementation of balance and fader a the four
speaker system. The attenuation steps size is 1
db from 0 to -24dB and increases non linearly up
to the maximum attenuationof 37.5dB. A special
mute bit forces the speaker attenuator into the
muteposition.

All 4 outputs are low distortion push pull outputs,
able to drive a load of 3kΩ.

8/10

TDA7433

DIM.

MIN. TYP. MAX. MIN. TYP. MAX.

A 2.35 2.65 0.093 0.104

A1 0.1 0.3 0.004 0.012

B 0.33 0.51 0.013 0.020

C 0.23 0.32 0.009

D 12.6 13 0.496 0.512

E 7.4 7.6 0.291 0.299

e 1.27 0.050

H 10 10.65 0.394 0.419

h 0.25 0.75 0.010 0.030

L 0.4 1.27 0.016 0.050

K0°(min.)8° (max.)

mm inch

0.013

OUTLINE AND

MECHANICAL DATA

SO20

B

e

D

1120

110

L

hx45°

A

K

A1

C

H

E

SO20MEC

9/10

TDA7433

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of use of such information nor for any infringement of patents or other rights of third parties which may result from its use. No license is
granted by implication or otherwise under any patent or patent rights of STMicroelectronics. Specification 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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10/10