TDA7438D(1999) Просмотр технического описания (PDF) - STMicroelectronics
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TDA7438D Datasheet PDF : 17 Pages
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TDA7438
ELECTRICAL CHARACTERISTICS (continued.)
Symbol
Parameter
Test Condition
AUDIO OUTPUTS
VCLIP
Clipping Level
RL
Output Load Resistance
RO
Output Impedance
VDC
DC Voltage Level
d = 0.3%
GENERAL (Gain, Bass, Treble, Middle Controls Flat)
ENO
Output Noise
All gains = 0dB;
BW = 20Hz to 20KHz flat
Et
Total Tracking Error
(Volume + Speaker Attenuator)
AV = 0 to -24dB
AV = -24 to -47dB
AV = -47 to -79dB
S/N
Signal to Noise Ratio
All gains 0dB; VO = 1VRMS ;
SC
Channel Separation Left/Right
d
Distortion
AV = 0; VI = 1VRMS ;
BUS INPUT
VIL
Input Low Voltage
VIH
Input High Voltage
IIN
Input Current
VIN = 0.4V
Min. Typ. Max. Unit
2.1
2.6
VRMS
2
KΩ
10
40
70
Ω
3.8
V
5
15
µV
0
1
dB
0
2
dB
0
3
dB
90
106
dB
80
100
dB
0.01 0.08
%
1
V
3
V
-5
5
µA
TEST CIRCUIT
L-IN1 3
0.47µF
L-IN2 4
0.47µF
L-IN3 5
0.47µF
100K
100K
100K
2.2µF
5.6nF
2.7K
18nF
5.6K
22nF 100nF
100nF
MUXOUTL
INL TREBLE(L)
6
7
18
MOUT(L)
17
16
RM
BIN(L)
14
RB
BOUT(L)
15
G
VOLUME
TREBLE
MIDDLE
BASS
SPKR ATT
LEFT
LOUT
27
4/17
R-IN1 2
0.47µF
R-IN2 1
0.47µF
R-IN3 28
0.47µF
100K
100K
100K
0/30dB
2dB STEP
I2CBUS DECODER + LATCHES
21
SCL
22
SDA
20
DIGGND
G
VOLUME
TREBLE
MIDDLE
BASS
INPUT MULTIPLEXER
+ GAIN
8
9
19
MUXOUTR
INR TREBLE(R)
RM
10
11
MOUT(R)
RB
12
BIN(R)
SPKR ATT
RIGHT
26
ROUT
VREF
24
SUPPLY
25
13
23
BOUT(R) CREF
VS
AGND
2.2µF
5.6nF
18nF
2.7K
22nF 100nF
5.6K
100nF
10µF
D96AU490A
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