TDA7438 Datasheet, PDF (3/17 Pages) STMicroelectronics – THREE BANDS DIGITALLY CONTROLLED AUDIO PROCESSOR

TDA7438
ELECTRICAL CHARACTERISTICS (refer to the test circuit T_amb = 25°C, V_S = 9V, R_L= 10KΩ,
RG = 600Ω, all controls flat (G = 0dB), unless otherwise specified)
Symbol
SUPPLY
Parameter
Test Condition
Min. Typ. Max. Unit
V_S
I_S
SVR
Supply Voltage
Supply Current
Ripple Rejection
6
9
10.2
7
60
90
INPUT STAGE
R_IN
Input Resistance
V_CL
Clipping Level
SIN
Input Separation
G_inmin
G_inman
G_step
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
R_i
Input Resistance
C_RANGE
A_VMAX
Control Range
Max. Attenuation
A_STEP Step Resolution
E_A
Attenuation Set Error
E_T
Tracking Error
V_DC
A_mute
DC Step
Mute Attenuation
A_V = 0 to -24dB
A_V = -24 to -47dB
A_V = 0 to -24dB
A_V = -24 to -47dB
adjacent attenuation steps
from 0dB to A_V 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
R_B
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
T_STEP 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
M_STEP Step Resolution
1
2
3
R_M
Internal Feedback Resistance
18.75 25 31.25
SPEAKER ATTENUATORS
C_RANGE Control Range
SSTEP Step Resolution
E_A
Attenuation Set Error
ET
Tracking Error
V_DC
Amute
DC Step
Mute Attenuation
A_V = 0 to -20dB
A_V = -20 to -56dB
AV = 0 to -24dB
A_V = -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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