SGS Thomson Microelectronics TDA7315, TDA7315D Datasheet



DIGITAL CONTROLLED AUDIO PROCESSOR

1 STEREOINPUT
LOUDNESSFUNCTION
VOLUMECONTROLIN 1.25dB STEPS
TREBLEAND BASSCONTROL
TWOSPEAKERSATTENUATORS:

- INDEPENDENTSPEAKERSCONTROL
IN 1.25dB STEPS

- INDEPENDENTMUTE FUNCTION

ALL FUNCTIONS PROGRAMMABLE VIA SE­RIAL BUS

DESCRIPTION

The TDA 7315 is a volume, tone (bass and treble)
balance(Left/Right)processorforqualityaudioappli­cationsincarradioandHi-Fisystems.

Controlisaccomplishedbyserial busmicroprocessor
interface.
TheAC signalsettingis obtainedbyresistornetworks

TDA7315

SO20

ORDERING NUMBER: TDA7315 (DIP20)

and switc hes com bined with operational amplifi­ers.

Thanks to the used BIPOLAR /C M OS Technol ogy,
LowDistortion, Low Noiseand DC steppingare ob­tained.

DIP 20

TDA7315D (SO 20)

BLOCK DIAGRAM

July 1998

1/12

TDA7315

PIN CONNECTION (Topview)

THERMAL DATA

Symbol Parameter SO 20 DIP 20 Unit

R

thj-pins

Thermal Resistance Junction-pins Max. 150 150 °C/W

ABSOLUTE MAXIMUM RATINGS

Symbol Parameter Value Unit

V

T

amb

T

stg

Operating Supply Voltage 10.2 V

S

Operating Ambient Temperature -10 to 85 °C
Storage Temperature Range -55 to +150 °C

QUICK REFERENCEDATA

Symbol Parameter Min. Typ. Max. Unit

V

V

CL

THD Total Harmonic Distortion V = 1Vrms f = 1KHz 0.01 0.1 %

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 TrebleControl 2db step -14 +14 dB
Balance Control 1.25dB step -38.75 0 dB
Mute Attenuation 100 dB

2/12

TEST CIRCUIT

TDA7315

ELECTRICAL CHARACTERISTICS (refer to the test circuit T

=25°C, VS= 9V, RL= 10KΩ,RG=

amb

600Ω, all controls flat (G = 0), f = 1KHz unless otherwisespecified)

Symbol Parameter Test Condition Min. Typ. Max. Unit

SUPPLY

V

S

I

S

SVR Ripple Rejection 60 80 dB

Supply Voltage 6 9 10 V
Supply Current 8 11 mA

VOLUMECONTROL

R

IV

C

RANGE

A

VMIN

A

VMAX

A

STEP

E

A

E

T

V

DC

Input Resistance 20 33 50 k
Control Range 70 75 80 dB
Min. Attenuation -1 0 1 dB
Max. Attenuation 70 75 80 dB
Step Resolution 0.5 1.25 1.75 dB
Attenuation Set Error Av = 0to -20dB

Av = -20to -60dB

-1.25

-3

0 1.25

2
Tracking Error 2dB
DC Steps adjacent attenuation steps

From 0dB to Av max

0

0.5

3

7.5

SPEAKERATTENUATORS

C
S

A

range
STEP

E

MUTE

V

DC

A

Control Range 35 37.5 40 dB
Step Resolution 0.5 1.25 1.75 dB
Attenuation set error 1.5 dB
Output Mute Attenuation 80 100 dB
DC Steps adjacent att. steps

from 0 to mute

0
1

3

10

BASS CONTROL (1)

Gb ControlRange Max. Boost/cut +12 +14 +16 dB

B

STEP

R

B

Step Resolution 1 2 3 dB
Internal Feedback Resistance 34 44 58 KΩ

Ω

dB
dB

mV
mV

mV
mV

3/12

TDA7315

ELECTRICALCHARACTERISTICS (continued)

Symbol Parameter Test Condition Min. Typ. Max. Unit

TREBLECONTROL (1)

Gt ControlRange Max. Boost/cut +13 +14 +15 dB

T

STEP

AUDIO OUTPUTS

Step Resolution 1 2 3 dB

V

OCL

R

L

C

L

R

OUT

V

OUT

Clipping Level d = 0.3% 2 2.5 Vrms
Output LoadResistance 2 KΩ
Output LoadCapacitance 10 nF
Output resistance 30 75 120 Ω
DC Voltage Level 4.2 4.5 4.8 V

GENERAL

e

NO

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

d Distortion A

Sc Channel Separation left/right 80 103 dB

Output Noise BW = 20-20KHz, flat

output muted
all gains = 0dB

A curve all gains = 0dB 3 µV

O

=0,VIN= 1Vrms

V

A

= -20dB VIN= 1Vrms

Total Tracking error A

V

= 0 to -20dB

V

V

= 0.3Vrms

IN

-20 to -60 dB

2.5
515

µ
µV

= 1Vrms 106 dB

0.01

0.09

0.04

0
0

0.1

0.3

1
2

%
%
%

dB
dB

V

BUS INPUTS

V

IL

V

IH

I

IN

V

O

Note:
(1) Bass and Treble response seeattached diagram (fig.19). The center frequencyand quality of the resonance behaviour can be choosenby

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

Figure 1: LoudnessversusVolume Attenuation

Input Low Voltage 1V
Input High Voltage 3 V
Input Current -5 +5 µA
Output VoltageSDA

IO= 1.6mA 0.4 V

Acknowledge

Figure2: Loudnessversus Frequency

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TDA7315

Figure 3: LoudnessversusExternal Capacitors

LOUDNESS

=9V

V

S

Volume = -40dB
All other control flat
C

= 2.2µF

in

= 220nF,100nF, 33nF, 10nF, Open, Shorterto Vref

C

loud

Figure 5: Signalto Noise Ratiovs. Volume

Setting

Figure4: Noisevs. Volume/GainSettings

Figure6: Distortion& Noisevs. Frequency

Figure 7: Distortion& Noisevs. Frequency

Figure8: Distortionvs. Load Resistance

5/12

TDA7315

Figure 9: ChannelSeparation(L → R) vs.

Frequency

Figure 11: OutputClipping Level vs. Supply

Voltage

Figure10: SupplyVoltage Rejection vs.

Frequency

Figure12: QuiescentCurrent vs. SupplyVoltage

Figure 13: SupplyCurrentvs. Temperature

6/12

Figure14: BassResistance vs.Temperature

TDA7315

Figure 15: TypicalTone Response(with the ext.

components indicatedin the test
circuit)

SOFTWARE SPECIFICATION
InterfaceProtocol

The interfaceprotocol comprises:

A startcondition (S)
A chip address byte, containing the TDA7315

address(the 8th bit of the byte must be 0). The
TDA7315must always acknowledgeat the end
of each transmitted byte.

A sequenceof data (N-bytes+ acknowledge)
A stopcondition (P)

TDA7315 ADDRESS

MSB first byte LSB MSB LSB MSB LSB

S10000000

ACK

DATA

ACK

DATA

ACK

P

Data Transferred (N-bytes+ Acknowledge)
ACK = Acknowledge
S = Start

P = Stop

MAX CLOCK SPEED 100kbits/s

SOFTWARESPECIFICATION

Chip address= 80 Hex

1

MSB

DATA BYTES

Ax = 1.25dB steps; Bx= 10dB steps; Cx = 2dB steps; X = don‘t care.

0000000

MSB LSB FUNCTION

0
1
1
0
0
0

0
0
0
1
1
1

B2

0
1
0
1
1

B1
B1
B1

X
0
1

LSB

B0
B0
B0

X
C3
C3

A2
A2
A2

L
C2
C2

A1
A1
A1

X
C1
C1

A0
A0
A0

X
C0
C0

Volume control
Speaker ATT L
Speaker ATT R
Loudness
Bass control
Treble control

7/12

TDA7315

SOFTWARESPECIFICATION (continued)

DATA BYTES(detailed description)

Volume

MSB LSB FUNCTION

0 0 B2 B1 B0 A2 A1 A0 Volume 1.25dB steps

0
0
0
0
1
1
1
1

0 0 B2 B1 B0 A2 A1 A0 Volume 10dB steps

0
0
0
0
1
1
1
1

0
0
1
1
0
0
1
1

0
1
0
1
0
1
0
1

0
0
1
1
0
0
1
1

For examplea volume of -45dBis givenby:
00100100

0

1

0

1

0

1

0

1

0

-1.25

-2.5

-3.75

-5

-6.25

-7.5

-8.75

0

-10

-20

-30

-40

-50

-60

-70

Speaker Attenuators

MSB LSB FUNCTION

1
1

0
0

0
1

B1
B1

0
0
1
1

11111 Mute

B0
B0

A2
A2

0
0
0
0
1
1
1
1

0
1
0
1

A1
A1

A0
A0

0
0
1
1
0
0
1
1

0

1

0

1

0

1

0

1

Speaker L
Speaker R

For exampleattenuationof 25dBon speakerR is givenby:
10110100

0

-1.25

-2.5

-3.75

-5

-6.25

-7.5

-8.75
0

-10

-20

-30

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Loudness

MSB LSB FUNCTION

010XXLXX

0
1

LOUDNESS ON
LOUDNESS OFF

x = don‘t care
For examplesLoudness Offcan be programmedby the following 8 bit string:

01000100

Bass and Treble

TDA7315

0
0

1
1

1
1

0
1

C3
C3

0
0
0
0
0
0
0
0

1
1
1
1
1
1
1
1

C2
C2

0
0
0
0
1
1
1
1

1
1
1
1
0
0
0
0

C3 = Sign
For exampleBass at -10dBis obtainedby the following8 bit string:
01100010

C1
C1

0
0
1
1
0
0
1
1

1
1
0
0
1
1
0
0

C0
C0

Bass

Treble

0
1
0
1
0
1
0
1

1
0
1
0
1
0
1
0

-14

-12

-10

-8

-6

-4

-2
0

0
2
4
6
8

10
12
14

9/12

TDA7315

SO20 PACKAGEMECHANICAL DATA

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 0.013

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

K 0 (min.)8 (max.)

mm inch

L

A

B

e

K

D

1120

E

110

SO20MEC

hx45°

A1

H

C

10/12

DIP20 PACKAGE MECHANICAL DATA

TDA7315

DIM.

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

a1 0.254 0.010

B 1.39 1.65 0.055 0.065
b 0.45 0.018

b1 0.25 0.010

D 25.4 1.000
E 8.5 0.335
e 2.54 0.100

e3 22.86 0.900

F 7.1 0.280

I 3.93 0.155
L 3.3 0.130
Z 1.34 0.053

mm inch

11/12

TDA7315

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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 withoutnotice. 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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