TDA7461N Datasheet, PDF (4/31 Pages) STMicroelectronics – CAR RADIO SIGNAL PROCESSOR

TDA7461N
AUDIO PROCESSOR PART
Input Multiplexer
Fully differential or quasi-differential CD and
cassette stereo input
AM mono or stereo input
Phone differential or single ended input
Internal beep with 2 frequencies (selectable)
Mixable phone and beep signals
Loudness
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
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
Test Condition
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
all inputs except Phone
Adjacent Gain Step
GMIN to GMAX
DIFFERENTIAL CD STEREO INPUT
Rin
Input Resistance
CMRR Common Mode Rejection Ratio
eN
Output Noise @ Speaker
Output
Differential
Common Mode
VCM = 1VRMS @ 1KHz
VCM = 1VRMS @ 10KHz
20Hz to 20KHz flat; all stages
0dB
DIFFERENTIAL PHONE INPUT
Rin
Input Resistance
CMRR Common Mode Rejection Ratio
Differential
Common Mode
VCM = 1VRMS @ 1KHz
VCM = 1VRMS @ 10KHz
Min. Typ. Max. Unit
70
100 130
KΩ
2.2
2.6
VRMS
80
100
dB
-1
0
1
dB
13
14
15
dB
1
2
3
dB
-5
0
+5
mV
-5
1
+5
mV
70
100 130
KΩ
20
30
40
KΩ
45
70
dB
45
60
dB
9
15
µV
10
15
20
KΩ
20
30
40
KΩ
45
70
dB
45
60
dB
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