TDA7420 Datasheet, PDF (4/29 Pages) STMicroelectronics – MULTIFUNCTIONAUDIO PROCESSOR

TDA7420
ELECTRICAL CHARACTERISTICS (VS = 8.5V; Tamb = 25°C; RL = 10KΩ; all gains = 0dB; f = 1KHz;
unless otherwise specified, refer to the Test Circuit.)
Symbol
Parameter
INPUT SECTION
Differential Input Pins 52, 53, 54, 55
RI
Input Resistance
VCL
Clipping Level
CMRR Common Mode Rejection Ratio
GDIFF
Differential Gain
Stereo Input Pins 56, 57
RI
Input Resistance
VCL
Clipping Level
Quasi Differential Input Pins 58, 59,60
RI
Input Resistance
VCL
Clipping Level
Composite Input Pin 61
RI
Input Resistance
VCL
Clipping Level
MULTIPLEXER
RO
Output Resistance (pin 2,3)
GIMIN
Minimum Gain
GIMAX
Maximum Gain
GSTEP
Step Resolution
VDC
Dc Steps
VOLUME CONTROL
RI
Input Resistance (1, 64)
C_MAX
Max Gain
A_MAX
Max Attenuation
ASTEPC
Step Resolution Coarse
Attenuation
EA
Attenuation Set Error
E_T
Tracking Error
VDC
DC Steps
SOFT MUTE
A_MUTE
Mute Attenuation
t_D
Delay Time
Test Condition
THD = 0.3%
Adjacent Gain Step
GMIN to GMAX
AV = 16 to -40dB
G =16 to -40dB
Adjacent Attenuation Steps
from 0dB to A_MAX
CEXT = 22nF;
0 to -20dB;
I = IMAX
I = IMIN
Min.
37
2.0
45
-1
75
2.0
18
2.0
18
2.0
100
-1
14
0.5
-5
24
15
0.5
-1.5
-3
40
BASS CONTROL
C_RANGE Control Range
+15
A_STEP
Step Resolution
0.5
RB
Internal Feedback Resistance
48
Typ.
50
2.5
55
0
100
2.5
25
2.5
25
2.5
200
0
15
1
1
2
33
16
63
1.0
0
0.1
0.5
50
1.0
23
+18
1
65
Max. Unit
63
KΩ
Vrms
dB
1
dB
125
KΩ
Vrms
32
KΩ
Vrms
32
KΩ
Vrms
300
Ω
1
dB
16
dB
1.5
dB
5
mV
mV
42
KΩ
17
dB
dB
1.5
dB
1.5
dB
2
dB
3
mV
5
mV
dB
ms
ms
+20
dB
1.5
dB
82
KΩ
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