TDA7449 Datasheet, PDF (3/17 Pages) STMicroelectronics – TONE CONTROL DIGITALLY CONTROLLED AUDIO PROCESSOR

TDA7449
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
S_IN
Input Separation
Ginmin
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
C_RANGE Control Range
A_VMAX
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
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 (1)
Gb
Control Range
B_STEP
Step Resolution
R_B
Internal Feedback Resistance
TREBLE CONTROL (1)
Gt
T_STEP
Control Range
Step Resolution
Max. Boost/cut
Max. Boost/cut
+12.0
1
18.75
+14.0
2
25
+16.0
3
31.25
+13.0 +14.0 +15.0
1
2
3
SPEAKER ATTENUATORS
C_RANGE Control Range
S_STEP
Step Resolution
E_A
Attenuation Set Error
V_DC
A_mute
DC Step
Mute Attenuation
A_V = 0 to -20dB
A_V = -20 to -56dB
adjacent attenuation steps
76
0.5
1
1.5
-1.5
0
1.5
-2
0
2
0
3
80
100
NOTE1:
1) The device is functionally good at Vs = 5V. a step down, on Vs, to 4V does’t reset the device.
2) BASS and TREBLE response: The center frequency and the response quality can be chosen by the external circuitry.
V
mA
dB
KΩ
Vrms
dB
dB
dB
dB
dB
dB
dB
dB
dB
dB
dB
mV
mV
dB
dB
dB
KΩ
dB
dB
dB
dB
dB
dB
mV
dB
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