TDA7438(1999) Просмотр технического описания (PDF) - STMicroelectronics
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TDA7438 Datasheet PDF : 17 Pages
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TDA7438
ELECTRICAL CHARACTERISTICS (refer to the test circuit Tamb = 25°C, VS = 9V, RL= 10KΩ,
RG = 600Ω, all controls flat (G = 0dB), unless otherwise specified)
Symbol
SUPPLY
Parameter
Test Condition
Min. Typ. Max. Unit
VS
IS
SVR
Supply Voltage
Supply Current
Ripple Rejection
6
9
10.2
7
60
90
INPUT STAGE
RIN
Input Resistance
VCL
Clipping Level
SIN
Input Separation
Ginmin
Ginman
Gstep
Minimum Input Gain
Maximum Input Gain
Step Resolution
100
THD = 0.3%
2
2.5
The selected input is grounded 80
100
through a 2.2µ capacitor
-1
0
1
30
2
VOLUME CONTROL
Ri
Input Resistance
CRANGE
AVMAX
Control Range
Max. Attenuation
ASTEP Step Resolution
EA
Attenuation Set Error
ET
Tracking Error
VDC
Amute
DC Step
Mute Attenuation
AV = 0 to -24dB
AV = -24 to -47dB
AV = 0 to -24dB
AV = -24 to -47dB
adjacent attenuation steps
from 0dB to AV max
20
33
50
45
47
49
45
47
49
0.5
1
1.5
-1.0
0
1.0
-1.5
0
1.5
0
1
0
2
0
3
0.5
80
100
BASS CONTROL (The center frequency and the response quality can be chosen by the ext. circuitry)
Gb
Control Range
Max. Boost/cut
+12.0 +14.0 +16.0
BSTEP Step Resolution
1
2
3
RB
Internal Feedback Resistance
33
44
55
TREBLE CONTROL (The center frequency and the response quality can be chosen by the ext. circuitry)
Gt
Control Range
Max. Boost/cut
+13.0 +14.0 +15.0
TSTEP Step Resolution
1
2
3
MIDDLE CONTROL (The center frequency and the response quality can be chosen by the ext. circuitry)
Gm
Control Range
Max. Boost/cut
+12.0 +14.0 +16.0
MSTEP Step Resolution
1
2
3
RM
Internal Feedback Resistance
18.75 25 31.25
SPEAKER ATTENUATORS
CRANGE Control Range
SSTEP Step Resolution
EA
Attenuation Set Error
ET
Tracking Error
VDC
Amute
DC Step
Mute Attenuation
AV = 0 to -20dB
AV = -20 to -56dB
AV = 0 to -24dB
AV = -24 to -47dB
adjacent attenuation steps
76
0.5
1
1.5
-1.5
0
1.5
-2
0
2
0
1
0
2
0
3
80
100
V
mA
dB
KΩ
Vrms
dB
dB
dB
dB
KΩ
dB
dB
dB
dB
dB
dB
dB
mV
mV
dB
dB
dB
KΩ
dB
dB
dB
dB
KΩ
dB
dB
dB
dB
dB
dB
mV
dB
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