®
TDA7400D
ADVANCED CAR SIGNAL PROCESSOR
FULLY INTEGRATED SIGNAL PROCESSOR
OPTIMIZED FOR CAR RADIO APPLICA-
TIONS
FULLY PROGRAMMABLE BY I
2
C BUS
INCLUDES AUDIOPROCESSOR, STEREO -
DECODER WITH NOISE BLANKER AND
MULTIPATH DETECTOR
PROGRAMMABLE ROLL-OFF COMPENSA-
TION
NO EXTERNAL COMPONENTS
DESCRIPTION
The TDA7400D is the newcomer of the CSP fam-
ily introduced by TDA7460/61. It uses the same
innovative concepts and design technologies al-
lowing fully software programmability through I
2
C
bus and overall cost optimisation for the system
designer.
The device includes an audioprocessor with con-
figurable inputs and absence of external compo-
nents for filter settings, a last generation
BLOCK DIAGRAM
SO28
ORDERING NUMBER:
TDA7400D
stereodecoder with multipath detector and a so-
phisticated stereoblend and noise cancellation
circuitry.
Strength points of the CSP approach are flexibility
and overall cost/room saving in the application,
combined with high performances.
CDL CDGND CDR
7
6
5
SMUTE
18
ACOUTL
28
ACOUTR
27
MONO-FADER
MONO-FADER
24
26
23
25
OUT LR
OUT LF
OUT RR
OUT RF
AM
CassR
CassL
Ph-
Ph+
10
4
3
8
9
INPUT
MULTIPLEXER
+
AUTO ZERO
MUXR
MUXL
FM_R
FM_L
VOLUME
SOFT
MUTE
TREBLE
BASS
MONO-FADER
MONO-FADER
19
DIGITAL CONTROL
I
2
C BUS
20
16
15
SCL
SDA
MUX R
MUX L
MPX
11
80KHz
LP
PILOT
CANCELLATION
DEMODULATOR
+ STEREO ADJUST
+ STEREO BLEND
25KHz
LP
S&H
HIGH
CUT
QUAL.
22
1
SUPPLY
PLL
PIL
DET
MULTIPATH-
DETECTOR
13
MPIN
14
MPOUT
FM NOISE
BLANKER
PULSE
FORMER
17
QUAL
V
DD
V
REF
D
A
12
LEVEL
D99AU1046
21
GND
2
CREF
October 2003
1/28
TDA7400D
ABSOLUTE MAXIMUM RATINGS
Symbol
V
S
T
amb
T
stg
Operating Supply Voltage
Operating Ambient Temperature Range
Operating Storage Temperature Range
Parameter
Value
10.5
-40 to 85
-55 to 150
Unit
V
°C
°C
SUPPLY
Symbol
V
S
I
S
SVRR
Parameter
Supply Voltage
Supply Current
Ripple Rejection @ 1KHz
V
S
= 9V
Audioprocessor (all filters flat)
Stereodecoder + Audioprocessor
Test Condition
Min.
7.5
25
50
45
Typ.
9
30
60
55
Max.
10
35
Unit
V
mA
dB
dB
ESD
All pins are protected against ESD according to the MIL883 standard.
PIN CONNECTION
V
REF
C
REF
CassL
CassR
CDR
CDGND
CDL
Ph-
Ph+
AM
MPX
LEVEL
MPIN
MPOUT
1
2
3
4
5
6
7
8
9
10
11
12
13
14
D99AU1047
28
27
26
25
24
23
22
21
20
19
18
17
16
15
ACOUTL
ACOUTR
OUT LF
OUT RF
OUT LR
OUT RR
V
DD
GND
SDA
SCL
SMUTE
QUAL
MUX R
MUX L
THERMAL DATA
Symbol
R
th-j pins
Parameter
Thermal Resistance Junction-pins
Max
Value
85
Unit
°C/W
2/28
TDA7400D
PIN DESCRIPTION
N.
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
Name
VREF
CREF
TAPEL
TAPER
CDR
CDGND
CDL
PH -
PH +
AM
MPX
LEVEL
MPIN
MPOUT
MUXL
MUXR
QUAL
SMUTE
SCL
SDA
GND
VS
OUTRR
OUTLR
OUTRF
OUTLF
ACOUTR
ACOUTL
Function
Reference Voltage Output
Reference Capacitor Pin
Tape Input Left
Tape Input Right
CD Right Channel Input
CD Input Common Ground
CD Input Left Channel
Differential Phone Input -
Differential Phone Input +
AM Input
FM Stereodecoder Input
Level Input Stereodecoder
Multipath Input
Multipath Output
Multiplexer Output Left Channel
Multiplexer Output Right Channel
Stereodecoder Quality Output
Soft Mute Drive
I
2
C Clock Line
I
2
C Data Line
Supply Ground
Supply Voltage
Right Rear Speaker Output
Left Rear Speaker Output
Right Front Spaeaker Output
Left Front Speaker Output
Pre-speaker AC Output Right Channel
Pre-speaker AC Output Left Channel
Type
I
S
I
I
I
I
I
I
I
I
I
I
I
O
O
O
O
I
I
I/O
S
S
O
O
O
O
O
O
Pin type legenda: I = Input O = Output I/O = Input/Output S = Supply nc = not connected
3/28
TDA7400D
AUDIO PROCESSOR PART
Input Multiplexer
Quasi-differential CD and cassette stereo input
AM mono input
Phone differential input
Multiplexer signal after In-Gain available at
separate pins
Volume control
1dB attenuator
Max. gain 15dB
Max. attenuation 79dB
Bass Control
2nd order frequency response
Center frequency programmable in 4(5) steps
DC gain programmable
±15
x 1dB steps
Treble Control
2nd order frequency response
Center frequency programmable in 4 steps
±15
x 1dB steps
Speaker Control
4 independent speaker controls in 1dB steps
max gain 15dB
max. attenuation 79dB
Mute Functions
Direct mute
Digitally controlled softmute with 4 programmable
mute time
ELECTRICAL CHARACTERISTICS
(V
S
= 9V; T
amb
= 25°C; R
L
= 10KΩ; all gains = 0dB; f = 1KHz;
unless otherwise specified).
Symbol
Parameter
Test Condition
Min.
Typ.
Max.
Unit
INPUT SELECTOR
R
in
V
CL
S
IN
G
IN MIN
G
IN MAX
G
STEP
V
DC
Input Resistance
Clipping Level
Input Separation
Min. Input Gain
Max. Input Gain
Step Resolution
DC Steps
Adjacent Gain Step
G
MIN
to G
MAX
all inputs except Phone
70
2.2
80
-1
13
0.5
-5
-10
100
2.6
100
0
15
1
0.5
5
130
KΩ
V
RMS
dB
dB
dB
dB
mV
mV
1
17
1.5
5
10
DIFFERENTIAL CD STEREO INPUT
R
in
CMRR
e
N
Input Resistance
Common Mode Rejection Ratio
Output Noise @ Speaker
Outputs
Differential
Common Mode
V
CM
= 1
VRMS
@ 1KHz
V
CM
= 1
VRMS
@ 10KHz
20Hz to 20KHz flat; all stages
0dB
70
70
45
45
100
100
70
60
6
15
130
130
KΩ
KΩ
dB
dB
µV
DIFFERENTIAL PHONE INPUT
R
in
CMRR
Input Resistance
Common Mode Rejection Ratio
Differential
V
CM
= 1
VRMS
@ 1KHz
V
CM
= 1
VRMS
@ 10KHz
40
40
40
56
70
60
KΩ
dB
dB
4/28
TDA7400D
ELECTRICAL CHARACTERISTICS
(continued)
Symbol
Parameter
Test Condition
Min.
Typ.
Max.
Unit
VOLUME CONTROL
G
MAX
A
MAX
A
STEP
E
A
E
T
V
DC
Max Gain
Max Attenuation
Step Resolution
Attenuation Set Error
Tracking Error
DC Steps
G = -20 to 20dB
G = -60 to 20dB
Adjacent Attenuation Steps
From 0dB to G
MIN
13
70
0.5
-1.25
-4
15
79
1
0
0
0.1
0.5
1.5
1.25
3
2
3
5
17
dB
dB
dB
dB
dB
dB
mV
mV
SOFT MUTE
A
MUTE
T
D
Mute Attenuation
Delay Time
T1
T2
T3
T4
V
THlow
V
THhigh
R
PD
Low Threshold for SM Pin
1
High Threshold for SM Pin
Internal Pull-up Resistor
20
200
2.5
70
±13
f
C1
f
C2
f
C3
f
C4
Q
1
Q
2
Q
3
Q
4
DC = off
DC = on
0.5
54
63
72
90
0.9
1.1
1.3
1.8
-1
3.5
±13
0.5
f
C1
f
C2
f
C3
f
C4
8
10
12
14
80
100
0.48
0.96
40.4
324
1
2
60
600
1
130
±17
1.5
66
77
88
110
1.1
1.4
1.7
2.2
1
5.5
±17
1.5
12
15
18
21
dB
ms
ms
ms
ms
V
V
KΩ
100
±15
1
60
70
80
100
(150)
(2)
1
1.25
1.5
2
0
4.4
±15
1
10
12.5
15
17.5
BASS CONTROL
C
RANGE
A
STEP
f
C
Control Range
Step Resolution
Center Frequency
dB
dB
Hz
Hz
Hz
Hz
Q
BASS
Quality Factor
DC
GAIN
Bass-Dc-Gain
dB
dB
TREBLE CONTROL
C
RANGE
A
STEP
f
C
Control Range
Step Resolution
Center Frequency
dB
dB
KHz
KHz
KHz
KHz
1) The SM pin is active low (Mute = 0)
2) See note in Programming Part
5/28
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