ST TEA6420 User Manual

BUS-CONTROLLED AUDIO MATRIX SWITCH

GND

CAPACITANCE

L1
L2
L3

L4
L5

LOUT1

ROUT1

LOUT2

ROUT2

SDA
SCL
ADDR
R1
R2
R3

R4
R5
ROUT4
LOUT4
ROUT3
LOUT3

V

S

1
2
3
4
5
6
7
8
9
10

20
19
18
17
16
15

24
23
22
21

11
12

25

13
14

28
27
26

NC
NC

NC
NC

■ 5 Stereo Inputs

■ 4 Stereo Ouputs

■ Gain Control 0/2/4/6dB/Mute for each Output

■ cascadable (2 different addresses)

■ Serial Bus Controlled

■ Very low Noise

■ Very low Distorsion

DESCRIPTION

The TEA6420 switches 5 s tereo audio inputs on
4stereo outputs.

All the switching possibilities are changed through

2

the I

C bus.

TEA6420

SHRINK DIP 24

(Plastic Package)

ORDER CODE: TEA6420

SO28

(Plastic Micropackage)

ORDER CODE: TEA6420D

Figure 1. PIN CONNECTIONS

S

L1
L2
L3
L4
L5

1
2
3
4
5
6
7
8
9
10
11
12

24
23
22
21
20
19
18
17
16
15
14
13

SDA
SCL
ADDR
R1
R2
R3
R4
R5
ROUT4
LOUT4
ROUT3
LOUT3

GND

CAPACITANCE

V

February 2006 1/7

LOUT1

ROUT1

LOUT2

ROUT2

6420-01.eps - 6420-02.eps

1

TEA6420

Figure 2. BLOCK DIAGRAM

RIGHT INPUTS

V

GND

T
E

GAIN = 0/2/4/6dB

A
6
4
2

RIGHT
OUTPUTS

0

S

C

SUPPLY

BUS DECODER

SDA

SCL

ADDR

LEFT
OUTPUTS

LEFT INPUTS

GAIN = 0/2/4/6dB

6420-03.eps

2/7

1

ABSOLUTE MAXIMUM RATINGS

Symbol Parameter Value Unit

V

T

OPER

T

CC

stg

Supply Voltage (Pin 9) 12 V
Operating Ambient Temperature Range 0 to +70
Storage Temperature Range -20 to +150

THERMA L D ATA

Symbol Parameter+ Value Unit

R

(j-a)

th

Junction-Ambient Thermal Resistance SDIP24

SO28

75
75

o

ELECTRICAL CHARACTERISTICS

TA = 25oC, VS = 10V, RL = 10kΩ, RG = 600Ω, f = 1kHz (unless otherwise specified)

Symbol Parameter Test Conditions Min. Typ. Max. Unit

SUPPLY

V

S

I

S

Supply Voltage
Supply Current

SVR Ripple Rejection V

MATRIX

V

IN

R

I

C

S

Input DC Level
Input Resistance
Channel Separation VIN = 2V

OUTPUT BUFFER

V
R

OUT

OUT

e

NI

Output DC Level
Output Resistance
Input Noise BW = 20 - 20kHz, flat 3 µV

S/N Signal to Noise Ratio V

G

min

G

max

Min. Gain
Max. Gain

d Distortion V

V

CL

R

L

Clipping Level d = 0.3% 2 2.5 V
Output Load Resistance

BUS INPUT

V

IL

V

IN

I

I

V

O

R

pu

Input Low Voltage
Input High Voltage
Input Current
Output Voltage IO = 3mA ; SDA Acknowledge pin 0.4 V

ADDR Pullup Resistor Note 40 50 k

= 500mV

IN

RMS

, BW = 20 - 20kHz 70 80 dB

RMS

Gain = 0dB

f = 1kHz Gain = 6dB

IN

IN

= V

= V

OUT

OUT

= 1V

= 1V

RMS

RMS

8 9 10.2 V

58mA

4.5 5 5.5 V
30 50 100 k

80
70

90
82

4.5 5 5.5 V

70 200 W

110 dB

-1 0 + 1 dB
567dB

0.01 0.05 %

2k

1.5 V

3V

- 10 10 µA

TEA6420

o

C

o

C

C/W

Ω

dB
dB

RMS

Ω

Ω

3/7

1