TDA7407
Advanced car signal processor
Features
●
Fully integrated signal processor optimized
for car radio applications
●
Fully programmable by i2c bus
●
Includes audioprocessor, stereo decoder
with noise blanker and multipath detector
●
Softmute function
●
Programmable roll-off compensation
●
No external components
LQFP44
Description
The TDA7407 is the newcomer of the CSP family
introduced by TDA7460/61. It uses the same
innovative concepts and design technologies
allowing fully software programmability through
I2C bus and overall cost optimisation for the
system designer.
Order codes
(s)
Part number
ct
TDA7407
TDA7407TR
o
r
P
e
du
c
u
d
)
s
t(
The device includes a three band audioprocessor
with configurable inputs, and absence of external
components for filter settings, a last generation
stereo decoder with multipath detector, and a
sophisticated stereo blend and noise cancellation
circuitry. Strength points of the CSP approach are
flexibility and overall cost/room saving in the
application, combined with high performances.
e
t
le
o
s
b
O
-
o
r
P
Package
Packing
LQFP44
Tray
LQFP44
Tape and reel
t
e
l
o
s
b
O
January 2007
Rev 3
1/46
www.st.com
1
Contents
TDA7407
Contents
1
Block diagram and pin connections . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7
1.1
2
ESD . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9
Audio processor part . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10
2.1
2.2
List of features . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10
3
2.1.1
Input multiplexer . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10
2.1.2
Volume control . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10
2.1.3
Bass control . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10
2.1.4
Mid control . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10
2.1.5
Treble control . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10
2.1.6
Speaker control . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10
2.1.7
Mute functions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11
c
u
d
)
s
t(
Electrical characteristics . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11
o
r
P
Stereo decoder part . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 14
e
t
le
3.1
Notes to the characteristics: . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 16
o
s
b
O
-
4
Noise blanker part . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 17
5
Multipath detector . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 20
5.1
5.1.1
r
P
e
5.1.3
5.1.4
t
e
l
o
O
2/46
Input multiplexer . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 21
u
d
o
5.1.2
bs
)
s
(
ct
Description of the audioprocessor part . . . . . . . . . . . . . . . . . . . . . . . . . . 21
Input stages . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 21
AutoZero . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 21
AutoZero remain . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 21
5.1.5
Multiplexer output . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 21
5.1.6
Softmute . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 22
5.1.7
BASS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 22
5.1.8
Attenuation (80Hz) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 23
5.1.9
Center frequency (60, 70, 80, 100Hz) . . . . . . . . . . . . . . . . . . . . . . . . . . 23
5.1.10
Quality factors (1, 1.25, 1.5, 2) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 23
5.1.11
DC mode . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 23
5.1.12
MID . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 23
5.1.13
Attenuation (1kHz) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 23
TDA7407
Contents
5.2
5.1.14
Center frequency (500, 1k, 1.5k, 2k Hz) . . . . . . . . . . . . . . . . . . . . . . . . 23
5.1.15
Quality factor (2 at 1kHz) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 23
5.1.16
Treble . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 23
5.1.17
Attenuation (17.5kHz) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 23
5.1.18
Center frequency (10, 12.5, 15, 17.5kHz) . . . . . . . . . . . . . . . . . . . . . . . 23
5.1.19
AC coupling . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 23
5.1.20
Speaker Attenuator . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 24
5.3
Functional description of the stereo decoder . . . . . . . . . . . . . . . . . . . . . . 26
5.2.1
Stereo decoder Mute . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 26
5.2.2
Ingain + Infilter . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 27
5.2.3
Demodulator . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 27
5.2.4
De-emphasis and Highcut. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 28
5.2.5
PLL and pilot tone detector . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 28
5.2.6
Field strength control . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 28
5.2.7
LEVEL Input and Gain . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 29
5.2.8
Stereoblend control . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 29
5.2.9
Highcut control . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 29
5.2.10
Functional description of the noiseblanker . . . . . . . . . . . . . . . . . . . . . . . 29
5.2.11
Trigger path . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 30
5.2.12
Automatic noise controlled threshold adjustment (ATC) . . . . . . . . . . . . 30
c
u
d
o
s
b
O
-
5.3.1
Automatic threshold control by the stereoblend voltage . . . . . . . . . . . . 31
5.3.2
Over deviation detector . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 31
)
s
(
ct
Functional description of the multipath detector . . . . . . . . . . . . . . . . . . . . 31
u
d
o
5.4.1
5.4.2
r
P
e
5.4.3
6
o
r
P
Automatic threshold control mechanism . . . . . . . . . . . . . . . . . . . . . . . . . 31
5.4
5.5
e
t
le
)
s
t(
Programming . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 32
Quality detector . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 32
AF Search Control . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 32
6.1
Interface protocol . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 34
6.2
Auto increment . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 34
s
b
O
t
e
l
o
Test mode . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 32
I2C Bus interface description . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 34
7
Data byte specification . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 36
8
Package information . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 44
3/46
Contents
9
TDA7407
Revision history . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 45
c
u
d
e
t
le
)
s
(
ct
u
d
o
r
P
e
t
e
l
o
s
b
O
4/46
o
s
b
O
-
o
r
P
)
s
t(
TDA7407
List of tables
List of tables
Table 1.
Table 2.
Table 3.
Table 4.
Table 5.
Table 6.
Table 7.
Table 8.
Table 9.
Table 10.
Table 11.
Table 12.
Table 13.
Table 14.
Table 15.
Table 16.
Table 17.
Table 18.
Table 19.
Table 20.
Table 21.
Table 22.
Table 23.
Table 24.
Table 25.
Table 26.
Table 27.
Pin Description . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8
Absolute maximum ratings . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9
Supply . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9
Thermal data. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9
Audio processor electrical characteristics . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11
Stereo decoder electrical characteristics . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 14
Noise blanker electrical characteristics. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 17
Multipath electrical characteristics . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 20
Quality detector. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 20
Addresses . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 34
Transmitted data (send mode) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 34
Subaddress (receive mode) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 35
Input selector (subaddress 0H). . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 36
Volume and speaker attenuation (subaddress 1H, 4H, 5H, 6H, 7H) . . . . . . . . . . . . . . . . . 36
Treble filter (subaddress 2H) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 37
Bass filter (subaddress 3H) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 37
Soft mute and bass programming (subaddress 8H) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 38
Stereo decoder (subaddress 9H) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 38
Noiseblanker (subaddress AH) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 39
High Cut (subaddress BH) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 39
Field strength Control (subaddress CH) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 40
Configuration (subaddress DH) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 40
Stereo decoder adjustment (subaddress EH). . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 41
Testing (subaddress FH) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 41
New quality / control (subaddress 10H) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 42
Mid filter (subaddress 11H). . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 43
Document revision history . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 45
c
u
d
e
t
le
)
s
(
ct
)
s
t(
o
r
P
o
s
b
O
-
u
d
o
r
P
e
t
e
l
o
s
b
O
5/46
List of figures
TDA7407
List of figures
Figure 1.
Figure 2.
Figure 3.
Figure 4.
Figure 5.
Figure 6.
Figure 7.
Figure 8.
Figure 9.
Figure 10.
Figure 11.
Figure 12.
Figure 13.
Figure 14.
Figure 15.
Figure 16.
Figure 17.
Figure 18.
Figure 19.
Figure 20.
Figure 21.
Figure 22.
Figure 23.
Figure 24.
Figure 25.
Block diagram . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7
Pin connections (top view) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7
Vn timing diagram . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 18
Trigger threshold vs.VPEAK . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 19
Deviation controlled trigger adjustment . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 19
Fieldstrength controlled trigger adjustment . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 19
Input stages . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 22
Softmute timing . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 22
Bass control @ fc = 80Hz, Q = 1 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 24
Bass center @ Gain = 14dB, Q =1 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 24
Bass quality factors @ Gain =14dB, fc = 80Hz. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 24
Bass normal and DC mode @ Gain = 14dB, fc = 80Hz . . . . . . . . . . . . . . . . . . . . . . . . . . . 24
Mid control @ fc=1kHz, Q=1. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 25
Mid center frequency @ Gain=14dB, Q1 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 25
Mid Q factor @ fc=1kHz, Gain=14dB . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 25
Treble control @ fc = 17.5KHz . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 25
Treble center frequencies @ Gain = 14dB . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 25
Block diagram of the stereo decoder . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 26
Signals during stereo decoder's softmute. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 27
Internal Stereoblend characteristics . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 27
Relation between internal and external LEVEL voltage and setup of stereoblend . . . . . . . 28
High cut characteristics. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 28
Block Diagram of the Noiseblanker . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 30
Block diagram of the multipath detector . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 32
Mute control logic . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 33
c
u
d
e
t
le
)
s
(
ct
u
d
o
r
P
e
t
e
l
o
s
b
O
6/46
o
s
b
O
-
o
r
P
)
s
t(
TDA7407
1
Block diagram and pin connections
Block diagram and pin connections
Figure 1.
Block diagram
c
u
d
ACINLR
N.C.
ACOUTL
ACOUTR
VREF
ACINRR
CREF
ACINLF
TAPE L
41
ACINRF
TAPE R
42
40
39
38
37
36
35
34
o
r
P
4
30
OUT LR
CDL
5
29
OUT RR
N.C.
6
28
N.C.
PHONE-
7
27
VS
PHONE+
8
26
GND
AFS
9
25
N.C.
AM
10
24
SDA
N.C.
11
23
SCL
12
13
14
15
16
17
18
19
20
21
22
SMUTE
OUT RF
CDLOUT
du
QUAL
31
N.C.
3
MUXL
OUT LF
CDGND
MUXR
N.C.
32
N.C.
33
2
MPOUT
1
MPIN
CDR
CDROUT
LEVEL
s
b
O
43
N.C.
o
r
P
e
o
s
b
O
-
44
(s)
ct
t
e
l
o
e
t
le
Pin connections (top view)
MPX
Figure 2.
)
s
t(
PINCON-TDA7407
7/46
Block diagram and pin connections
Table 1.
Pin Description
N.
Name
1
CDR
Type
CD right channel input
I
CDROUT CD output right channel
O
3
CDGND
CD input common ground
I
4
CDLOUT
CD output left channel
O
5
CDL
CD input left channel
I
6
nc
7
PH -
Differential phone input -
I
8
PH +
Differential phone input +
I
9
AFS
AFS drive
I
10
AM
AM input
I
11
nc
12
MPX
13
nc
14
LEVEL
15
MPIN
16
MPOUT
17
nc
18
MUXL
Multiplexer output left channel
19
MUXR
Multiplexer output right channel
20
nc
21
QUAL
22
SMUTE
-
)
s
t(
-
FM stereo decoder input
Level input stereo decoder
Multipath input
Multipath output
e
t
le
so
(s)
b
O
-
Stereo decoder quality output
ct
Soft mute drive
2C
u
d
o
clock line
Pr
od
uc
I
I
I
O
O
O
O
I
I
23
SCL
I
24
SDA
I2C data line
25
nc
26
GND
Supply ground
S
27
VS
Supply voltage
S
28
nc
29
OUTRR
Right rear speaker output
O
30
OUTLR
Left rear speaker output
O
31
OUTRF
Right front spaeaker output
O
32
OUTLF
Left front speaker output
O
33
nc
34
ACOUTR
Pre-speaker AC output right channel
O
35
ACOUTL
Pre-speaker AC output left channel
O
t
e
l
o
8/46
Function
2
r
P
e
s
b
O
TDA7407
I/O
-
-
-
TDA7407
Block diagram and pin connections
Table 1.
Pin Description (continued)
N.
Name
Function
Type
36
nc
37
ACINLR
Pre-speaker input left rear channel
I
38
ACINRR
Pre-speaker input right rear channel
I
39
ACINRF
Pre-speaker input right front channel
I
40
ACINLF
Pre-speaker input left front channel
I
41
VREF
Reference voltage output
O
42
CREF
Reference capacitor pin
S
43
TAPEL
Tape input left
I
44
TAPER
Tape input right
I
-
Pin type legend: I = Input ; O = Output; I/O = Input/Output; S = Supply; nc = not connected
Table 2.
Absolute maximum ratings
Symbol
VS
Operating ambient temperature range
Tstg
Operating storage temperature range
Supply
Parameter
VS
Supply voltage
IS
Supply current
SVRR
t
e
l
o
Symbol
10.5
V
-40 to 85
°C
-55 to 150
°C
Min.
Typ.
Max.
Unit
7.5
9
10
V
VS = 9V
30
35
40
mA
Audioprocessor (all filters flat)
50
60
dB
Stereo decoder + audioprocessor
45
55
dB
Ripple rejection @ 1KHz
r
P
e
Table 4.
Test Condition
)
s
(
ct
u
d
o
P
e
let
o
s
b
O
-
Unit
ro
Operating supply voltage
Symbol
s
b
O1.1
Value
Tamb
Table 3.
c
u
d
Parameter
)
s
t(
Thermal data
Parameter
Rth-j pins Thermal resistance junction to pins (max)
Value
Unit
85
°C/W
ESD
All pins are protected against ESD according to the MIL883 standard.
9/46
Audio processor part
TDA7407
2
Audio processor part
2.1
List of features
2.1.1
Input multiplexer
2.1.2
●
Quasi differential CD and cassette stereo input
●
AM mono input
●
Phone differential input
●
Multiplexer signal after In-Gain available at separate pins
2.1.3
Volume control
●
1dB attenuator
●
Max. gain 15dB
●
Max. attenuation 79dB
2.1.4
●
2nd order frequency response
●
Q-factor programmable in 4 steps
●
Center frequency programmable in 4(5) steps
●
DC gain programmable
●
±15 x 1dB steps
Mid control
2.1.5
2nd order frequency response
●
Q-factor programmable in 2 steps
●
Center frequency programmable in 4 steps
●
±15 x 1dB steps
u
d
o
r
P
e
Treble control
t
e
l
o
●
●
s
b
O
10/46
)
s
(
ct
e
t
le
o
s
b
O
-
●
●
2.1.6
c
u
d
Bass 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
o
r
P
)
s
t(
TDA7407
2.1.7
Audio processor part
2.2
Mute functions
●
Direct mute
●
Digitally controlled softmute with 4 programmable mute time.
Electrical characteristics
.
Table 5.
Audio processor electrical characteristics
(VS = 9V; Tamb = 25°C; RL = 10KΩ; all gains = 0dB; f = 1KHz; unless otherwise
specified)
Symbol
Parameter
Test condition
Min.
Typ.
Max.
Unit
70
100
130
KΩ
Input selector
Rin
Input resistance
VCL
Clipping level
2.2
2.6
SIN
Input separation
80
100
GIN MIN Min. input gain
-1
0
GIN MAX Max. input gain
13
GSTEP
all inputs except phone
CMRR
eN
)
s
(
ct
Common mode rejection
ratio
Output noise @ speaker
outputs
u
d
o
17
dB
dB
-5
0.5
5
mV
-10
5
10
mV
70
100
130
KΩ
Common mode
70
100
130
KΩ
VCM = 1VRMS @ 1KHz
45
70
dB
VCM = 1VRMS @ 10KHz
45
60
dB
P
e
let
GMIN to GMAX
Input resistance
dB
1.5
o
s
b
O
Differential
Rin
1
1
0.5
DC steps
Differential CD stereo input
dB
c
u
d
15
)
s
t(
ro
Step resolution
Adjacent gain step
VDC
VRMS
20Hz to 20KHz flat; all stages
0dB
6
15
mV
Differential phone input
r
P
e
Rin
t
e
l
o
CMRR
O
bs
Input resistance
Differential
40
56
KΩ
Common mode rejection
ratio
VCM = 1VRMS @ 1KHz
40
70
dB
VCM = 1VRMS @ 10KHz
40
60
dB
Volume control
GMAX
Max gain
13
15
AMAX
Max attenuation
70
79
ASTEP
Step resolution
0.5
1
1.5
dB
G = -20 to 20dB
-1.25
0
1.25
dB
G = -60 to 20dB
-4
0
3
dB
2
dB
EA
Attenuation set error
ET
Tracking error
17
dB
dB
11/46
Audio processor part
Table 5.
TDA7407
Audio processor electrical characteristics (continued)
(VS = 9V; Tamb = 25°C; RL = 10KΩ; all gains = 0dB; f = 1KHz; unless otherwise
specified)
Symbol
VDC
Parameter
Test condition
Min.
Typ.
Max.
Unit
Adjacent attenuation steps
0.1
3
mV
From 0dB to GMIN
0.5
5
mV
DC steps
Soft mute/AFS
AMUTE
TD
Mute attenuation
80
100
dB
T1
0.48
ms
T2
0.96
ms
T3
40.4
ms
T4
324
ms
Delay time
VTH low Low threshold for SM-/AFS-
Pin(1)
1
VTH high High threshold for SM-/AFS-Pin
RPD
2.5
45
d
o
r
Bass control
CRANGE Control range
ASTEP
±15
±17
dB
0.5
1
1.5
dB
54
60
66
Hz
63
70
77
Hz
72
80
88
Hz
fC4
90
100
(150)
110
Hz
Q1
0.9
1
1.1
Q2
1.1
1.25
1.4
Q3
1.3
1.5
1.7
Q4
1.8
2
2.2
DC = off
-1
0
1
dB
DC = on
3.5
4.4
5.5
dB
±13
±15
±17
dB
0.5
1
1.5
dB
fC1
450
500
550
Hz
fC2
0.9
1
1.1
kHz
fC3
1.35
1.5
1.65
kHz
fC4
1.8
2
2.2
kHz
P
e
let
Step resolution
so
fC2
QBASS
Center frequency
du
Quality factor
o
r
P
e
)
s
(
ct
t
e
l
o
DCGAIN Bass-DC-gain
s
b
O
b
O
fC3
(2)
MID control
CRANGE Control range
ASTEP
fC
12/46
KΩ
±13
fC1
fC
)
s
t(
V
uc
Internal pull-up resistor
V
Step resolution
Center frequency
TDA7407
Audio processor part
Table 5.
Audio processor electrical characteristics (continued)
(VS = 9V; Tamb = 25°C; RL = 10KΩ; all gains = 0dB; f = 1KHz; unless otherwise
specified)
Symbol
QMID
Parameter
Quality factor
Test condition
Min.
Typ.
Max.
Unit
Q1
0.9
1
1.1
Q2
1.8
2
2.2
±13
±15
±17
dB
0.5
1
1.5
dB
fC1
8
10
12
KHz
fC2
10
12.5
15
KHz
fC3
12
15
18
KHz
fC4
14
17.5
21
KHz
Treble control
CRANGE Control range
ASTEP
fC
Step resolution
Center frequency
1. The SM pin is active low (mute = 0)
2. See note in programming section
c
u
d
e
t
le
)
s
(
ct
)
s
t(
o
r
P
o
s
b
O
-
u
d
o
r
P
e
t
e
l
o
s
b
O
13/46
Stereo decoder part
3
TDA7407
Stereo decoder part
Table 6.
Stereo decoder electrical characteristics
(VS = 9V; de-emphasis time constant = 50μs,VMPX = 500mV (75KHz deviation),
fm= 1KHz, Gv = 6dB. Tamb = 25°C; unless otherwise specified)
Symbol
Parameter
Vin
MPX input level
Rin
Input resistance
GMIN
Test condition
Gv = 3.5dB
Unit
1.25
VRMS
70
100
130
KΩ
Min. input gain
1.5
3.5
4.5
dB
GMAX
Max. input gain
8.5
11
12.5
dB
GSTEP
Step resolution
1.75
2.5
3.25
dB
35
60
30
50
Supply voltage ripple
rejection
α
Max. channel separation
THD
Total harmonic distortion
S+N
-------------N
Signal plus noise to noise
ratio
Vripple = 100mV; f = 1KHz
0.02
A-weighted, S = 2VRMS
Mono / stereo switch
e
t
le
dB
)
s
t(
dB
0.3
c
u
d
%
80
91
10
15
25
mV
o
r
P
dB
VPTHST1
Pilot threshold voltage
for Stereo, PTH = 1
VPTHST0
Pilot threshold voltage
for Stereo, PTH = 0
15
25
35
mV
for Mono, PTH = 1
7
12
17
mV
for Mono, PTH = 1
10
19
25
mV
VPTHMO1 Pilot threshold voltage
VPTHMO0 Pilot threshold voltage
PLL
Δf/f
Capture range
c
u
d
De-emphasis and highcut
(t s)
so
b
O
-
0.5
%
tHC50
De-emphasis time constant
Bit 7, Subadr, 10 = 0,
VLEVEL >> VHCH
25
50
75
μs
tHC75
De-emphasis time constant
Bit 7, Subadr, 10 = 1,
VLEVEL >> VHCH
50
75
100
μs
tHC50
Highcut time constant
Bit 7, Subadr, 10 = 0,
VLEVEL >> VHCL
100
150
200
μs
tHC75
Highcut time constant
Bit 7, Subadr, 10 = 1,
VLEVEL >> VHCL
150
225
300
μs
4.7
5
5.3
V
o
r
P
e
t
e
l
o
14/46
Typ. Max.
0.5
SVRR
s
b
O
Min.
Stereo blend and highcut control
REF5V
Internal reference voltage
TCREF5V
Temperature coefficient
3300
ppm
LGmin
Min. LEVEL gain
-1
0
1
dB
LGmax
Max. LEVEL gain
8
10
12
dB
TDA7407
Stereo decoder part
Table 6.
Stereo decoder electrical characteristics (continued)
(VS = 9V; de-emphasis time constant = 50μs,VMPX = 500mV (75KHz deviation),
fm= 1KHz, Gv = 6dB. Tamb = 25°C; unless otherwise specified)
Symbol
Parameter
Test condition
Typ. Max.
Unit
0.3
0.67
1
dB
VSBLmin Min. voltage for mono
25
29
33
%REF5V
VSBLmax Min. voltage for mono
54
58
62
%REF5V
VSBLstep Step resolution
2.2
4.2
6.2
%REF5V
VHCHmin Min. voltage for NO highcut
38
42
46
%REF5V
VHCHmax Min. voltage for NO highcut
62
66
70
%REF5V
VHCHstep Step resolution
5
8.4
12
%REF5V
VHCLmin Min. voltage for full highcut
12
17
22
%VHCH
VHCLmax Max. voltage for full highcut
28
33
38
%VHCH
VHCLstep Step resolution
2.2
4.2
6.2
40
50
LGstep
LEVEL gain step resolution
Min.
Carrier and harmonic suppression at the output
α19
Pilot signal f = 19KHz
α38
Subcarrier f = 38KHz
α57
Subcarrier f = 57KHz
α76
Subcarrier f = 76KHz
ro
c
u
d
)
s
t(
%VHCH
dB
75
dB
62
dB
90
dB
65
dB
75
dB
Signal f = 57KHz
70
dB
u
d
o
75
dB
α114
Signal f = 114KHz
95
dB
α190
Signal f = 190KHz
84
dB
Intermodulation (Note 1)
α2
fmod = 10KHz, fspur = 1KHz
α3
fmod = 13KHz, fspur = 1KHz
)
s
(
ct
Traffic Ratio (Note 2)
α57
P
e
let
o
s
b
O
-
SCA - Subsidiary communications authorization (note 3)
α67
Signal f = 67KHz
r
P
e
ACI - Adjacent channel interference (note 4)
t
e
l
o
s
b
O
15/46
Stereo decoder part
3.1
TDA7407
Notes to the characteristics:
1.
Intermodulation suppression:
V O ( signal ) ( at1kHz )
α2 = ------------------------------------------------------- ; f = (2 x 10kHz) - 19kHz
V O ( spurious ) ( at1kHz ) s
V O ( signal ) ( at1kHz )
α3 = ------------------------------------------------------- ; f = (3 x 13kHz) - 38kHz
V O ( spurious ) ( at1kHz ) s
measured with: 91% pilot signal; fm = 10kHz or 13kHz.
2.
Traffic radio (V.F.) suppression: measured with: 91% stereo signal;
9% pilot signal; fm = 1kHz; 5% subcarrier (f = 57kHz, fm = 23Hz AM, m = 60%)
V O ( signal ) ( at1kHz )
α57 ( V.W > F. ) = --------------------------------------------------------------------------V O ( spurious ) ( at1kHz ± 23kHz )
3.
SCA (Subsidiary Communications Authorization) measured with: 81% mono signal;
9% pilot signal; fm = 1kHz; 10% SCA - subcarrier (fs = 67kHz, unmodulated).
c
u
d
V O ( signal ) ( at1kHz )
α67 = ------------------------------------------------------- ; Fs =(2 x 38kHz) - 67kHz
V O ( spurious ) ( at9kHz )
4.
ACI (Adjacent Channel Interference):
)
s
t(
o
r
P
V O ( signal ) ( at1kHz )
α114 = ------------------------------------------------------- ; Fs = 110kHz - (3 x 38kHz)
V O ( spurious ) ( at4kHz )
e
t
le
o
s
b
O
-
V O ( signal ) ( at1kHz )
α114 = ------------------------------------------------------- ; Fs = 186kHz - (5 x 38kHz)
V O ( spurious ) ( at4kHz )
measured with: 90% mono signal; 9% pilot signal; fm =1kHz; 1% spurious signal
(fs = 110kHz or 186kHz, unmodulated).
)
s
(
ct
u
d
o
r
P
e
t
e
l
o
s
b
O
16/46
TDA7407
4
Noise blanker part
Noise blanker part
●
internal 2nd order 140kHz high pass filter
●
programmable trigger threshold
●
trigger threshold dependent on high frequency noise with programmable gain
●
additional circuits for deviation and fieldstrength dependent trigger adjustment
●
very low offset current during hold time due to opamps wMOS inputs
●
four selectable pulse suppression times
●
programmable noise rectifier charge/discharge current
Table 7.
Noise blanker electrical characteristics
Symbol
VTR
Parameter
Test condition
Trigger threshold (1) (2)
meas. with VPEAK
= 0.9V
Min.
Typ.
Max.
Unit
NBT = 111
(10)
30
(10)
mVOP
NBT = 110
(10)
35
(10)
mVOP
NBT = 101
(10)
40
(10)
mVOP
NBT = 100
(10)
45
(10)
mVOP
NBT = 011
(10)
od
50
(10)
mVOP
55
(10)
mVOP
(10)
60
(10)
mVOP
(10)
65
(10)
mVOP
260
(10)
mVOP
mVOP
NBT = 010
NBT = 001
e
t
le
NBT = 000
VTRNOISE
VRECT
Noise controlled
trigger threshold (3)
u
d
o
r
P
e
t
e
l
o
VRECT DEV
s
b
O
Deviation dependent
rectifier voltage (4)
Fieldstrength
VRECT FS controlled rectifier
voltage (5)
NCT = 00
(10)
NCT = 01
(10)
220
(10)
NCT = 10
(10)
180
(10)
mVOP
NCT = 11
(10)
140
(10)
mVOP
(7)
0.5
0.9
1.3
V
VMPX = 50mV; f = 150KHz
1.5
1.7
2.1
V
VMPX = 200mV; f = 150KHz
2.2
2.5
2.9
V
OVD = 11
0.5
0.9(off)
1.3
VOP
OVD = 10
0.9
1.2
1.5
VOP
OVD = 01
1.7
2.0
2.3
VOP
OVD = 00
2.5
2.8
3.1
VOP
FSC = 11
0.5
0.9(off)
1.3
V
FSC = 10
0.9
1.4
1.5
V
FSC = 01
1.7
1.9
2.3
V
FSC = 00
2.1
2.4
3.1
V
b
O
-
meas. with VPEAK
= 1.5V
(s)
ct
Rectifier voltage
so
Pr
(10)
uc
)
s
t(
VMPX = 0mV
means. with
VMPX = 800mV
(75KHz dev.)
means. with
VMPX = 0mV
VLEVEL