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
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.
October 2003
SUPPLY
DEMODULATOR
+ STEREO ADJUST
+ STEREO BLEND
CREF
MPIN
OUT LR
D99AU1046
DIGITAL CONTROL
PILOT
CANCELLATION
V
DD
Ph+
INPUT
MULTIPLEXER
+
AUTO ZERO
MPX
VOLUME
BASS
TREBLE
MONO-FADER
MONO-FADER
MONO-FADER
MONO-FADER
OUT LF
OUT RR
OUT RF
SCL
SDA
80KHz
LP
PLL
25KHz
LP
S & H
HIGH
CUT
MULTIPATH-
DETECTOR
PULSE
FORMER
D
MPOUT
LEVEL
CDL CDGND CDR
CassL
Ph-
GND
SMUTE
SOFT
MUTE
PIL
DET
I
2
C BUS
FM NOISE
BLANKER
A
MUX R
MUX L
ACOUTL
ACOUTR
7
6
5
3
8
9
11
22
21
2
13
14
12
24
26
23
25
19
20
16
15
27
28
18
V
REF
1
MUXR
MUXL
FM_R
FM_L
CassR
4
AM
10
QUAL.
QUAL
17
BLOCK DIAGRAM
SO28
ORDERING NUMBER: TDA7400D
TDA7400D
ADVANCED CAR SIGNAL PROCESSOR
1/28
ABSOLUTE MAXIMUM RATINGS
Symbol
Parameter
Value
Unit
V
S
Operating Supply Voltage
10.5
V
T
amb
Operating Ambient Temperature Range
-40 to 85
C
T
stg
Operating Storage Temperature Range
-55 to 150
C
SUPPLY
Symbol
Parameter
Test Condition
Min.
Typ.
Max.
Unit
V
S
Supply Voltage
7.5
9
10
V
I
S
Supply Current
V
S
= 9V
25
30
35
mA
SVRR
Ripple Rejection @ 1KHz
Audioprocessor (all filters flat)
50
60
dB
Stereodecoder + Audioprocessor
45
55
dB
ESD
All pins are protected against ESD according to the MIL883 standard.
THERMAL DATA
Symbol
Parameter
Value
Unit
R
th-j pins
Thermal Resistance Junction-pins Max
85
C/W
V
REF
C
REF
CassL
CassR
CDR
CDL
CDGND
Ph-
Ph+
SDA
GND
V
DD
OUT LR
OUT RR
OUT RF
OUT LF
ACOUTR
ACOUTL
1
3
2
4
5
6
7
8
9
26
25
24
23
22
20
21
19
27
10
28
AM
SCL
D99AU1047
MPX
LEVEL
MPIN
MUX R
QUAL
SMUTE
11
12
13
18
16
17
15
14
MPOUT
MUX L
PIN CONNECTION
TDA7400D
2/28
PIN DESCRIPTION
N.
Name
Function
Type
1
VREF
Reference Voltage Output
I
2
CREF
Reference Capacitor Pin
S
3
TAPEL
Tape Input Left
I
4
TAPER
Tape Input Right
I
5
CDR
CD Right Channel Input
I
6
CDGND
CD Input Common Ground
I
7
CDL
CD Input Left Channel
I
8
PH -
Differential Phone Input -
I
9
PH +
Differential Phone Input +
I
10
AM
AM Input
I
11
MPX
FM Stereodecoder Input
I
12
LEVEL
Level Input Stereodecoder
I
13
MPIN
Multipath Input
I
14
MPOUT
Multipath Output
O
15
MUXL
Multiplexer Output Left Channel
O
16
MUXR
Multiplexer Output Right Channel
O
17
QUAL
Stereodecoder Quality Output
O
18
SMUTE
Soft Mute Drive
I
19
SCL
I
2
C Clock Line
I
20
SDA
I
2
C Data Line
I/O
21
GND
Supply Ground
S
22
VS
Supply Voltage
S
23
OUTRR
Right Rear Speaker Output
O
24
OUTLR
Left Rear Speaker Output
O
25
OUTRF
Right Front Spaeaker Output
O
26
OUTLF
Left Front Speaker Output
O
27
ACOUTR
Pre-speaker AC Output Right Channel
O
28
ACOUTL
Pre-speaker AC Output Left Channel
O
Pin type legenda: I = Input O = Output I/O = Input/Output S = Supply nc = not connected
TDA7400D
3/28
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
= 25C; R
L
= 10K
; all gains = 0dB; f = 1KHz;
unless otherwise specified).
Symbol
Parameter
Test Condition
Min.
Typ.
Max.
Unit
INPUT SELECTOR
R
in
Input Resistance
all inputs except Phone
70
100
130
K
V
CL
Clipping Level
2.2
2.6
V
RMS
S
IN
Input Separation
80
100
dB
G
IN MIN
Min. Input Gain
-1
0
1
dB
G
IN MAX
Max. Input Gain
13
15
17
dB
G
STEP
Step Resolution
0.5
1
1.5
dB
V
DC
DC Steps
Adjacent Gain Step
-5
0.5
5
mV
G
MIN
to G
MAX
-10
5
10
mV
DIFFERENTIAL CD STEREO INPUT
R
in
Input Resistance
Differential
70
100
130
K
Common Mode
70
100
130
K
CMRR
Common Mode Rejection Ratio
V
CM
= 1
VRMS
@ 1KHz
45
70
dB
V
CM
= 1
VRMS
@ 10KHz
45
60
dB
e
N
Output Noise @ Speaker
Outputs
20Hz to 20KHz flat; all stages
0dB
6
15
V
DIFFERENTIAL PHONE INPUT
R
in
Input Resistance
Differential
40
56
K
CMRR
Common Mode Rejection Ratio
V
CM
= 1
VRMS
@ 1KHz
40
70
dB
V
CM
= 1
VRMS
@ 10KHz
40
60
dB
TDA7400D
4/28
ELECTRICAL CHARACTERISTICS (continued)
Symbol
Parameter
Test Condition
Min.
Typ.
Max.
Unit
VOLUME CONTROL
G
MAX
Max Gain
13
15
17
dB
A
MAX
Max Attenuation
70
79
dB
A
STEP
Step Resolution
0.5
1
1.5
dB
E
A
Attenuation Set Error
G = -20 to 20dB
-1.25
0
1.25
dB
G = -60 to 20dB
-4
0
3
dB
E
T
Tracking Error
2
dB
V
DC
DC Steps
Adjacent Attenuation Steps
0.1
3
mV
From 0dB to G
MIN
0.5
5
mV
SOFT MUTE
A
MUTE
Mute Attenuation
80
100
dB
T
D
Delay Time
T1
0.48
1
ms
T2
0.96
2
ms
T3
20
40.4
60
ms
T4
200
324
600
ms
V
THlow
Low Threshold for SM Pin
1
1
V
V
THhigh
High Threshold for SM Pin
2.5
V
R
PD
Internal Pull-up Resistor
70
100
130
K
BASS CONTROL
C
RANGE
Control Range
13
15
17
dB
A
STEP
Step Resolution
0.5
1
1.5
dB
f
C
Center Frequency
f
C1
54
60
66
Hz
f
C2
63
70
77
Hz
f
C3
72
80
88
Hz
f
C4
90
100
(150)
(2)
110
Hz
Q
BASS
Quality Factor
Q
1
0.9
1
1.1
Q
2
1.1
1.25
1.4
Q
3
1.3
1.5
1.7
Q
4
1.8
2
2.2
DC
GAIN
Bass-Dc-Gain
DC = off
-1
0
1
dB
DC = on
3.5
4.4
5.5
dB
TREBLE CONTROL
C
RANGE
Control Range
13
15
17
dB
A
STEP
Step Resolution
0.5
1
1.5
dB
f
C
Center Frequency
f
C1
8
10
12
KHz
f
C2
10
12.5
15
KHz
f
C3
12
15
18
KHz
f
C4
14
17.5
21
KHz
1) The SM pin is active low (Mute = 0)
2) See note in Programming Part
TDA7400D
5/28
PDF 
ZIP