TDA7409 Datasheet, PDF (5/25 Pages) STMicroelectronics – CARRADIO-SIGNAL-PROCESSOR

TDA7409
ELECTRICAL CHARACTERISTICS (continued)
Symbol
Parameter
Test Conditions
V_DC DC Steps
Adjacent Steps
From 0dB to G_MIN
LOUDNESS CONTROL
A_STEP Step Resolution
A_MAX Max. Attenuation
f_C
Center Frequency
Min.
0.5
13
360
720
2.3
SOFT MUTE
A_MUTE Mute Attenuation
80
T_D Delay Time
T1
T2
T3
20
T4
70
V_{TH low Low Threshold for SM-Pin}²
V_{TH high} High Threshold for SM - Pin
2.50
R_PU Internal pull-up resistor
70
V_PU Pull-Up Voltage
SOFT STEP
T_SW Switch time
T_SW1
T_SW2
T_SW3
T_SW4
1) Center frequency 2.4KHz makes 1KHz bottom frequency at low & high frequency boost condition.
2) The SM-Pin is active low (Mute = 0)
BASS CONTROL
C_RANGE Control Range
+14
A_STEP Step Resolution
0.5
f_C
Center Frequency
f_C1
54
f_C2
72
f_C3
90
f_C4
180
Typ.
0.1
0.5
1
15
400
800
2.4¹
100
0.48
0.96
30.7
123
100
5
0.68
1.26
2.52
5.04
+15
1
60
80
100
200
Max.
3
5
1.5
17
440
880
2.5
1
2
50
170
1
130
+16
1.5
66
88
110
220
Unit
mV
mV
dB
dB
Hz
Hz
kHz
dB
ms
ms
ms
ms
V
V
kΩ
V
ms
ms
ms
ms
dB
dB
Hz
Hz
Hz
Hz
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