TDA7403 Datasheet, PDF (4/26 Pages) STMicroelectronics – BASIC SIGNAL PROCESSOR

TDA7403
AUDIO PROCESSOR PART
Input Multiplexer
MPX input
Cassette stereo input
AM mono or stereo input
Internal beep with 2 frequencies (selectable)
Mixable phone and beep signals
Loudness
First or second order frequency response
Programmable center frequency and quality factor
15 x 1dB steps
Selectable flat-mode (constant attenuation)
Volume control
1dB attenuator
Max. gain 20dB
Max. attenuation 79dB
Soft-step gain control
Bass Control
2nd order frequency response
Center frequency programmable in 4(5) steps
DC gain programmable
7 x 2dB steps
Treble Control
2nd order frequency response
Center frequency programmable in 4 steps
7 x 2dB steps
Speaker Control
4 independentspeaker controls (1dB steps
control range 50dB)
Mute Functions
Direct mute driven by pin SM
Digitally controlled softmute with 4 program-
mable time constants
ELECTRICAL CHARACTERISTICS (VS = 9V; Tamb = 25°C; RL = 10KΩ; all gains = 0dB; f = 1KHz;
unless otherwise specified).
Symbol
Parameter
INPUT SELECTOR
Rin
Input Resistance
VCL
Clipping Level
SIN
Input Separation
GIN MIN Min. Input Gain
GIN MAX Max. Input Gain
GSTEP
Step Resolution
VDC
DC Steps
BEEP CONTROL
VRMS
Beep Level
fBMIN
Lower Beep Frequency
fBMAX
Higher Beep Frequency
MIXING CONTROL
MLEVEL Mixing Level
Test Condition
all inputs except Phone
Adjacent Gain Step
GMIN to GMAX
Source
Source
Source
Beep/Phone
Min. Typ. Max. Unit
70
100 130
KΩ
2.2
2.6
VRMS
80
100
dB
-1
0
1
dB
14
dB
2
dB
0
mV
1
mV
350
mV
600
Hz
1.2
KHz
0
dB
-6
dB
-12
dB
0
dB
4/26