ST TEA6422 User Manual
BUS-CONTROLLED AUDIO MATRIX
■ 6 Stereo Inputs
■ 3 Stereo Ouputs
■ Gain Control 0 dB/Mute for each Output
■ Cascadable (2 different addresses)
■ Serial Bus Controlled
■ Very Low Noise
■ Very Low Distorsion
■ Fully ESD Protected
■ Wide Audio Dynamic Range ( 3 V
DESCRIPTION
The TEA6422 switches 6 stereo audio inputs on 3
stereo outputs.
All the switching possibilities are changed through
2
C BUS.
the I
RMS
)
TEA6422
SHRINK DIP24
(Shrink Plastic Package)
ORDER CODE: TEA6422
SO28
(Plastic Monopackage)
Figure 1. PIN CONNECTIONS
SDIP24
GND
CAPACITANCE
LOUT1
ROUT1
LOUT2
1
2
3
V
S
4
L1
5
L2
6
L3
7
L4
8
L5
9
L6
10
11
12
ORDER CODE: TEA6422D
SO28
28
SDA
27
SCL
26
ADDR
25
R1
24
R2
23
R3
22
NC
21
NC
20
R4
19
R5
18
R6
17
ROUT3
16
LOUT3
15
ROUT2LOUT2
V
NC
NC
1
2
3
S
4
L1
5
L2
6
L3
7
8
9
L4
10
L5
L6
11
12
13
14
GND
24
SDA
23
SCL
22
ADDR
21
R1
20
R2
19
R3
18
R4
17
R5
16
R6
15
ROUT3
14
LOUT3
13
ROUT2
CAPACITANCE
LOUT1
ROUT1
September 2003 1/10
1
TEA6422
BLOCK DIAGRAM
RIGHT INPUTS
GAIN = 0 dB
RIGHT
OUTPUTS
V
S
C
SUPPLY
BUS DECODER
GND
GAIN = 0 dB
LEFT INPUTS
ABSOLUTE MAXIMUM RATINGS
Symbol Parameter Value Unit
V
T
T
CC
oper
stg
Supply Voltage 12 V
Operating Temperature 0, + 70 oC
Storage Temperature - 20, + 150 oC
SDA
SCL
ADDR
LEFT
OUTPUTS
THERMA L D ATA
Symbol Parameter Value Unit
(j-a) Junction - ambient Thermal Resistance
R
th
SDIP24
SO28
75
75
2/10
1
o
C/W
o
C/W
TEA6422
ELECTRICAL CHARACTERISTICS
T
= 25oC, VS = 9 V, RL = 10 kΩ, RG = 600Ω, f = 1 kHz (unless otherwise specified)
A
Symbol Parameter Test Conditions Min. Typ. Max. Unit
SUPPLY
V
S
I
S
SVR Ripple Rejection V
MATRIX
V
IN
R
I
C
S
OUTPUT BUFFER
V
OUT
R
OUT
e
NI
S/N Signal to Noise Ratio V
G Gain -1 0 + 1 dB
d Distortion V
V
CL
R
L
Supply Voltage 8 10 11 V
Supply Current 3 8 mA
= 500mV
IN
, f = 1kHz 70 80 dB
RMS
Input DC Level VCC/2 V
Input Resistance 30 50 100 k
Channel Separation VIN = 2V
, f = 1kHz 80 90 dB
RMS
Output DC Level VCC/2 V
Output Resistance 50 100
Input Noise BW = 20 - 20kHz, flat 3 µV
IN
IN
= V
= V
OUT
OUT
= 1V
= 1V
RMS
RMS
110 dB
0.01 0.05 %
Clipping Level d = 0.3 %, VS = 10 V 2.8 3 V
Output Load Resistance 2 k
Ω
Ω
RMS
Ω
3/10
1
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