SGS Thomson Microelectronics TDA7310 Datasheet

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SERIAL BUS CONTROLLED AUDIO PROCESSOR

INPUTMULTIPLEXER:

- 4STEREOINPUTS

- ONEDIFFERENTIAL STEREO INPUT FOR REMOTESOURCES

SELECTABLE INPUT GAIN FOR OPTIMAL ADAPTIONTO DIFFERENTSOURCES

INPUT AND OUTPUT FOR EXTERNAL EQUALIZER OR NOISE REDUCTION SYSTEM

VOLUMECONTROL IN 1.25dB STEPS LOUDNESSFUNCTION TREBLEAND BASS CONTROL FOURSPEAKERATTENUATORS:

- 4 INDEPENDENTSPEAKERSCONTROL IN 1.25dB STEPS FOR BALANCEAND

FADERFACILITIES

- INDEPENDENTMUTE FUNCTION

ALL FUNCTIONS PROGRAMMABLE VIA SERIAL BUS

SELECTABLE CHIP ADDRESS DEDICATED PIN

TDA7310

PQFP44 (10 x 10)

ORDERING NUMBER: TDA7310

DESCRIPTION

The TDA7310 is a volume, tone (bass and treble) and fader(front/r ear)processor for high qualityaudio applicationsin car radioandHi-Fi systems.

Loudness and selectabl e input gain are provided. The control of all fuctions is accomplished by serial busmicroproc es sorinterface. TheAC signalsettingis obtainedbyresis to rnetwork s andswitchescombinedwith operationalamplifiers.

Thanks to the used BIP OLAR /CMOS Tecnology , LowDistortion,Low Noiseand DC steppingare obtained.

PIN CONNECTION (Top view)

November 1999

This is advanced information on a new product now in development or undergoing evaluation. Details are subject to change without notice.

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TDA7310

TEST CIRCUIT

THERMAL DATA

Symbol Description Value Unit

R

thj-pins

Thermal Resistance Junction-pins max 85 °C/W

ABSOLUTE MAXIMUM RATINGS

Symbol Parameter Value Unit

V

T

amb

T

stg

Operating Supply Voltage 10.2 V

S

Ambient Temperature -40 to 85 Storage Temperature Range -55 to +150 °C

QUICK REFERENCE DATA

Symbol Parameter Min. Typ. Max. Unit

V

CL

THD Total Harmonic Distortion V = 1Vrms f = 1KHz 0.01 %

S/N Signal to Noise Ratio 106 dB

S

Supply Voltage 6 9 10 V

S

Max. input signal handling 2 Vrms

Channel Separation f = 1KHz 103 dB

C

Volume Control 1.25dB step -78.75 0 dB Bass and Treble Control 2dB step -14 +14 dB Fader and Balance Control 1.25dB step -38.75 0 dB Input Gain 6.25dB step 0 18.75 dB Mute Attenuation 100 dB

C

°

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BLOCK DIAGRAM

+V

TDA7310

CC

BUS

C22

5.6K R2

C16

2.7nF

C20

C19

100nF

TREBLE(L)

BIN(L)

100nF

BOUT(L)

100nF

LOUD(L)

LOUD SW

10

31

32

38 39

ATT

SPKR

OUT

2

RB

LEFT FRONT

MUTE

ATT

SPKR

VOL

OUT

LEFT REAR

42

TREBLE

BASS

+ LOUD

MUTE

50K

ADDR

37

SCL

SEN

654

SERIAL BUS DECODER + LATCHES

SDA

3

DIGGND

SPKR

BASS TREBLE

VOL

ATT

+ LOUD

OUT

43

RIGHT FRONT

MUTE

ATT

SPKR

OUT

41

RIGHT REAR

RB

MUTE

13

36 35

D94AU170

TREBLE(R)

BOUT(R) BIN(R)

C17 C18

100nF 100nF 100nF

LOUD(R)

C15

C21

5.6K R1

2.7nF

OUT(R) IN(R)

22µFC12

AGND CREF

CC

V

C13 2.2µF

C14 2.2µF

OUT(L) IN(L)

30 29

4x

2.2µF

L1 28L1L2 27L2L3 26L3L4 25

C1

C2

C3

LEFT

INPUTS

C4

INPUT

+ GAIN

SELECTOR

L5

L4

16

C5

17

SGND

4.7µF C6

L5

CD

R5

18

R4 19R4R3 20R3R2 21

10µF

4.7µF C7

C8

R5

C9

RIGHT

INPUTS

R2

C10

24 R1

R1

C11

15 14 40

SUPPLY

897

4x

2.2µF

3/15

TDA7310

ELECTRICALCHARACTERISTICS (T

=25°C, VS= 9V, RL= 10KΩ,RG= 600Ω,GV=0dB, f = 1KHz

amb

unless otherwise specified) (referto the test circuit)

Symbol Parameter Test Condition Min. Typ. Max. Unit

SUPPLY

V

S

I

S

SVR Ripple Rejection 60 85 dB

Supply Voltage 6 9 10 V Supply Current 4 8 11 mA

INPUT SELECTORS

R

II

V

CL

CMRR Common Mode Rejection

INS Input Separation (2) 80 100 dB

R

L

G

INmin

G

INmax

G

STEP

e

IN

V

DC

Input Resistance Input 1, 2, 3, 4 50 K

Differential Input 10 KΩ

Clipping Level 2 2.5 Vrms

65 dB

Differential Input

Output Load resistance 2 KΩ Min. Input Gain -1 0 1 dB Max. Input Gain 18.75 dB Step Resolution 6.25 dB Input Noise G = 18.75dB 2 DC Steps adjacent gain steps 4 mV

G = 18.75 to Mute 4 mV

VOLUMECONTROL

Ω

V

µ

R

IN

C

RANGE

A

VMIN

A

VMAX

A

STEP

E

A

E

T

V

DC

Input Resistance 33 kΩ Control Range 75 dB Min. Attenuation -1 0 1 dB Max. Attenuation 75 dB Step Resolution 1.25 dB Attenuation Set Error AV= 0 to -20dB

Tracking Error 2dB DC Steps adjacent attenuation steps

SPEAKERATTENUATORS

Control Range 37.5 dB Step Resolution 1.25 dB Attenuation set error 1.5 dB Output Mute Attenuation 80 100 dB DC Steps adjacent att. steps

BASS CONTROL(1)

Control Range +14 dB Step Resolution 2 dB

R

B

V

DC

Internal Feedback Resistance 50 KΩ DC Steps adjacent control steps 0.1 mV

A

= -20 to -60dB

V

From 0dB to A

from 0 to mute

Vmax

-1.25

-3

0 1.25

0.1

0.5

0 1

2

dB

mV mV

dB

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TDA7310

ELECTRICALCHARACTERISTICS (continued)

Symbol Parameter Test Condition Min. Typ. Max. Unit

TREBLECONTROL(1)

Control Range +14 dB Step Resolution 2 dB

V

DC

AUDIO OUTPUTS

GENERAL

DC Steps adjacent control steps 0.1 mV

Clipping Level d = 0.3% 2.5 Vrms Output Load Resistance 2 K Output Load Capacitance 10 nF Output resistance 75 120 Ω DC Voltage Level 4.2 4.5 4.8 V

Ω

e

NO

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

d Distortion V

Output Noise BW = 20-20KHz, flat

output muted all gains = 0dB

O

= 1Vrms 0.01 %

IN

2.5 515

µV µV

= 1Vrms 106 dB

Sc Channel Separation left/right 80 103 dB

Total Tracking error A

= 0 to -20dB

V

-20 to -60 dB

0 0

1 2

dB dB

BUS INPUTS

V

IL

V

IH

V

O

Input Low Voltage 1V Input High Voltage 3 V Output Voltage SDA

IO= 1.6mA 0.4 V

Acknowledge

LOUDNESSSWITCH

V

IL

V

IH

I

IN

Input Low Voltage 1V Input High Voltage 3 V Input Current -5 +5 µA DC Step ON

OFF position 0.1 mV

←→

Loudness OFF = pin38 Open; LoudnessON = pin 38Closed to GND ADDRESSPIN (Internal 50KΩpulldown resistor)

V

IL

V

IH

I

IN

Notes:

(1) Bass and Trebleresponse see attached diagram(fig.17). The center frequency and quality of the resonance behaviour can be choosen by

the external circuitry. A standard first order bass response can be realized by a standard feedback network

(2) The selected input is groundedthru the 2.2µF capacitor.

Input Low Voltage 1V Input High Voltage VCC-1V V Input Current µA

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