Tea 6420
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Transcript of Tea 6420
September 2003 1/7
TEA6420
BUS-CONTROLLED AUDIO MATRIX SWITCH
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 stereo audio inputs on4stereo outputs.
All the switching possibilities are changed throughthe I2C bus.
Figure 1. PIN CONNECTIONS
SO28(Plastic Micropackage)
ORDER CODE: TEA6420D
SHRINK DIP 24(Plastic Package)
ORDER CODE: TEA6420
6420
-01.
eps
- 642
0-02
.eps
1
2
3
4
5
6
7
8
9
10
20
19
18
17
16
15
14
13
24
23
22
21
11
12
GND
CAPACITANCE
L1
L2
L3
L4
L5
LOUT1
ROUT1
LOUT2
ROUT2
SDA
SCL
ADDR
R1
R2
R3
R4
R5
ROUT4
LOUT4
ROUT3
LOUT3
VS
GND
CAPACITANCE
L1
L2
L3
L4
L5
LOUT1
ROUT1
LOUT2
ROUT2
SDA
SCL
ADDR
R1
R2
R3
R4
R5
ROUT4
LOUT4
ROUT3
LOUT3
VS
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
1
TEA6420
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Figure 2. BLOCK DIAGRAM
6420
-03.
eps
SUPPLY BUS DECODER
RIGHTOUTPUTS
LEFTOUTPUTS
SDA
SCL
ADDR
RIGHT INPUTS
GAIN = 0/2/4/6dB
GAIN = 0/2/4/6dB
VS
C
GND
LEFT INPUTS
TEA6420
1
TEA6420
3/7
ABSOLUTE MAXIMUM RATINGS
THERMAL DATA
ELECTRICAL CHARACTERISTICS TA = 25oC, VS = 10V, RL = 10kΩ, RG = 600Ω, f = 1kHz (unless otherwise specified)
Symbol Parameter Value UnitVCC Supply Voltage (Pin 9) 12 V
TOPER Operating Ambient Temperature Range 0 to +70 oC
Tstg Storage Temperature Range -20 to +150 oC
Symbol Parameter+ Value Unit
Rth(j-a)Junction-Ambient Thermal Resistance SDIP24
SO287575
oC/W
Symbol Parameter Test Conditions Min. Typ. Max. UnitSUPPLY
VSSupply Voltage 8 9 10.2 V
ISSupply Current 5 8 mA
SVR Ripple Rejection VIN = 500mVRMS, BW = 20 - 20kHz 70 80 dB
MATRIX
VINInput DC Level 4.5 5 5.5 V
RIInput Resistance 30 50 100 kΩ
CSChannel Separation VIN = 2VRMS Gain = 0dB
f = 1kHz Gain = 6dB8070
9082
dBdB
OUTPUT BUFFER
VOUTOutput DC Level 4.5 5 5.5 V
ROUTOutput Resistance 70 200 W
eNI Input Noise BW = 20 - 20kHz, flat 3 µV
S/N Signal to Noise Ratio VIN = VOUT = 1VRMS 110 dB
GminMin. Gain -1 0 + 1 dB
GmaxMax. Gain 5 6 7 dB
d Distortion VIN = VOUT = 1VRMS 0.01 0.05 %
VCL Clipping Level d = 0.3% 2 2.5 VRMS
RLOutput Load Resistance 2 kΩ
BUS INPUT
VILInput Low Voltage 1.5 V
VINInput High Voltage 3 V
IIInput Current - 10 10 µA
VO Output Voltage IO = 3mA ; SDA Acknowledge pin 0.4 V
Rpu ADDR Pullup Resistor Note 40 50 kΩ
1
TEA6420
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SOFTWARE SPECIFICATION
1. Chip address
2. Data bytes
X = don’t care - MSB is transmitted firstExample : 010XX100 connects outputs 3 with input 5 at a gain of 4dBThe following are selected after power-on reset : input 5 selected for all outputs ; gain = 0dB.
Address HEX ADDR1001 1000 98 0
1001 1010 9A 1
Output select
X 0011
0101
G1 G0 I2 I1 I0 Output 1Output 2Output 3Output 4
Input select
X Q1 Q0 G1 G0 000011
001100
010101
Input 1Input 2Input 3Input 4Input 5Mute
Gain select
X Q1 Q0 0011
0101
I2 I1 I0 Gain = 6 dBGain = 4 dBGain = 2 dBGain = 0 dB
1
TEA6420
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TYPICAL APPLICATION
Figure 3.
6420
-08.
04
1
2
3
4
5
6
7
8
9
10
11
12 13
14
15
16
17
18
19
20
21
22
23
24
µ22 F
100nFC1
C2
C3
C4
C5
C11
C12
C13
C14
CH2Output
L
R
L
R
CH1Output
LeftInputs
C15
C16
C
C
17
18
C10
C
C
9
8
C
C
7
6
SW
R
L
CH3Output
R
L
CH4Output
RightInputs
Bus InputsSCL
SDA
TEA6420
+9V
1
TEA6420
6/7
PACKAGE MECHANICAL DATA
24 PINS - PLASTIC DIP
Figure 4. 24-Pin Package
28 PINS - PLASTIC SO
Figure 5. 28-Pin Package
Stand-off
A1
B eB1
D
13
12
24
1
F
LA
e1
A2
c
E1
E
e2
Gage Plane
.015
0,38
e2
e3
E
SDIP24
1
TEA6420
7/7
Information furnished is believed to be accurate and reliable. However, STMicroelectronics assumes no responsibility for the consequencesof 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 grantedby implication or otherwise under any patent or patent rights of STMicroelectronics. Specifications mentioned in this publication are subjectto change without notice. This publication supersedes and replaces all information previously supplied. STMicroelectronics products are notauthorized for use as critical components in life support devices or systems without the express written approval of STMicroelectronics.
The ST logo is a registered trademark of STMicroelectronics
2003 STMicroelectronics - All Rights Reserved.
Purchase of I2C Components by STMicroelectronics conveys a license under the Philips I2C Patent. Rights to use these components in an I2C system is granted provided that the system conforms to the I2C Standard Specification as defined by Philips.
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