ST TDA7309 User Manual

TDA7309

Fi

DIGITAL CONTROLLED STEREO AUDIO PROCESSOR

WITH LOUDNESS

1FEATURES

■ INPUT MULTIPLEXER:

3 STEREO INPUTS

■ RECORD OUTPUT FUNCTION

■ LOUDNESS FUNCTION

■ VOLUME CONTROL IN 1dB STEPS

■ INDEPENDENT LEFT AND RIGHT VOLUME

CONTROL

■ SOFT MUTE FUNCTION

■ ALL FUNCTIONS PROGRAMMABLE VIA

SERIAL I

2

C BUS

2 DESCRIPTION

The TDA7309 is a control processor with independent left and right volume control for quality audio applications. Selectable external loudness and soft mute functions are provided.

Control is accomplished by serial I processor interface.

Figure 2. Block Diagram

2

C bus micro-

gure 1. Packages

DIP20

SO20

Table 1. Order Codes

Part Number Package

TDA7309 DIP20

TDA7309D SO20

TDA7309D013TR Tape & Reel

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

Thanks to the used BIPOLAR/CMOS Technology, Low Distortion, Low Noise and Low DC stepping are obtained.

March 2006

LEFT

INPUTS

RIGHT

INPUTS

3 x

2.2µF

3 x

2.2µF

17

18

20

14

13

11

SELECTOR

SUPPLY

16 7 15

AGNDV

S

INPUT

CREF

Recout(L)

1

TDA7309

10

Recout(R)

22µF

LOUD(L)

LOUDNESS

LOUD(R)

19

VOLUME +

12

100nF

SOFT MUTE

MUTE

2

6

4

5

8

3 CSM

9

D93AU045A

OUT

LEFT

DIGGND

SDA

SCL

ADDR

OUT

RIGHT

BUSSERIAL BUS DECODER + LATCHES

Rev. 6

1/14

TDA7309

Figure 3. Pin Description

RecoutL

OUTL

CSM

SDA

SCL

DGND

GND

ADD

OUTR

1

2

3

4

5

6

7

8

9 LOUDR

IN3L20

LOUDL

19

IN2L

18

IN1L

17

V

16

15

14

13

S

CREF

IN1R

IN2R

12

RecoutR 10 IN3R11

D94AU058A

Table 2. Absolute Maximum Ratings

Symbol Parameter Value Unit

V

S

T

amb

T

stg

Operating Supply Voltage 10.5 V

Operating Ambient Temperature –40 to 85 °C

Storage Temperature Range –55 to +150 °C

Table 3. QUICK REFERENCE DATA

Symbol Parameter Test Condition Min. Typ. Max. Unit

V

S

V

CL

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

S/N Signal to Noise Ratio 106 dB

Sc Channel Separation f = 1KHz 100 dB

Operating Supply Voltage 6 10 V

Max. Input Signal Handling 2 Vrms

Volume Control 1.0dB step –95 0 dB Soft Mute Attenuation 60 dB Direct Mute Attenuation 100 dB

Table 4. Thermal Data

Symbol Parameter SO20 DIP20 Unit

R

th j-pins

Thermal resistance Junction to Pins 150 100 °C/W

Figure 4. Test Circuit

IN1L

2/14

IN2L

IN3L

RecoutL

IN1R

IN2R

IN3R

RecoutR

17

18

20

1

TDA7309

14

13

11

19 12 5 4 6

10

LL LR

SCL SDA DIGGND

3

2

16

15 CREF

8

D94AU057A

CSM

OUTL

AGND7

OUTR9

V

ADD

S

TDA7309

Table 5. Electrical Characteristcs (Refer to the test circuit, T

= 25°C, VS = 9V, RL = 10KΩ, RG = 50Ω,

amb

all controls flat (G = 0), f = 1KHz unless otherwise specified.)

Symbol Parameter Test Condition Min. Typ. Max. Unit

SUPPLY

V

I

S

SVR Ripple Rejection 60 85 dB

INPUT SELECTORS

R

S

VOLUME CONTROL

C

RANGE

A

VMAX

A

STEP

E

V

DC

A

mute

SOFT MUTE

T

AUDIO OUTPUTS

V

CLIP

R

out

V

DC

GENERAL

e

NO

E t To t a l Tra c k i ng E r r o r A

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

d Distortion 0.01 0.1 %

S

BUS INPUTS

V

IL

V

I

IN

V

(*) Hedevice work until 5V but no guarantee about SVR

Supply Voltage 5 (*) 9 10 V

S

Supply Current 7 10 mA

Input Resistance 35 50 65 KΩ

I

Input Separation 80 90 dB

in

Control Range 92 dB

Max. Attenuation 87 92 95 dB

Step resolution 0.5 1 1.5 dB

Attenuation Set Error AV = 0 to -24dB -1.2 1.2 dB

A

= -24 to -56dB -3 2 dB

A

V

Tracking Error 2dB

T

DC Steps adjacent attenuation steps 0 3 mV

from 0dB to A

V max

0.5 5 mV

Output Mute Attenuation 80 100 dB

Delay Time C

d

= 22nF; 0 to –20dB

smute

Fast Mode 1 ms

Slow Mode 20 ms

Clipping Level d = 0.3% 2 2.6 Vrms

Output Load Resistance 2 KΩ

L

Output Impedance 100 200 300 Ω

DC Voltage Level 3.8 V

Output Noise BW = 20-20KHz, flat; output

2.5 µV

muted

all gains = 0dB 5 15 µV

A curve all gains = 0dB 3 µV

= 0 to –24dB

V

= -24 to –56dB

A

V

= 1Vrms 95 106 dB

O

Channel Separation 80 100 dB

C

0 0

1 2

Input Low Voltage 1V

Input High Voltage 3 V

IH

Input Current Vin = 0.4V -5 +5 µA

Output Voltage SDA Acknowledge IO = 1.6mA 0.4 0.8 V

O

dB dB

3/14

TDA7309

Figure 5. Noise vs. Volume Setting.

Figure 6. SVRR vs. Frequency.

Figure 8. THD vs. R

LOAD

.

Figure 9. Channel Separation vs. Frequency.

Figure 7. THD vs. frequency

4/14

Figure 10. Output Clip Level vs. Supply

Voltage.

TDA7309

Figure 11. Quiescen Current vs. Supply

Voltage

Figure 12. Loudness vs. Volume Attenuation

Figure 13. Loudness vs. Frequency

(C

= 100nF) vs. Volume

LOAD

Figure 14. Loudness vs. External Capacitors

5/14