TDA7407DTR STMicroelectronics, TDA7407DTR Datasheet

IC PROCESSOR ADV SIGNAL 44-LQFP

TDA7407DTR

Manufacturer Part Number
TDA7407DTR
Description
IC PROCESSOR ADV SIGNAL 44-LQFP
Manufacturer
STMicroelectronics
Type
Car Signal Processorr
Datasheet

Specifications of TDA7407DTR

Applications
Automotive Systems
Mounting Type
Surface Mount
Package / Case
44-LQFP
Lead Free Status / RoHS Status
Lead free / RoHS Compliant

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Company
Part Number
Manufacturer
Quantity
Price
Part Number:
TDA7407DTR
Manufacturer:
STMicroelectronics
Quantity:
10 000
Features
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
I
system designer.
Order codes
January 2007
2
C bus and overall cost optimisation for the
Fully integrated signal processor optimized
for car radio applications
Fully programmable by i
Includes audioprocessor, stereo decoder
with noise blanker and multipath detector
Softmute function
Programmable roll-off compensation
No external components
Part number
TDA7407TR
TDA7407
2
c bus
Package
LQFP44
LQFP44
Rev 3
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.
Advanced car signal processor
LQFP44
Tape and reel
Packing
Tray
TDA7407
www.st.com
1/46
1

Related parts for TDA7407DTR

TDA7407DTR Summary of contents

Page 1

Features ● Fully integrated signal processor optimized for car radio applications 2 ● Fully programmable bus ● Includes audioprocessor, stereo decoder with noise blanker and multipath detector ● Softmute function ● Programmable roll-off compensation ● No external ...

Page 2

Contents Contents 1 Block diagram and pin connections . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7 1.1 ESD . ...

Page 3

TDA7407 5.1.14 5.1.15 5.1.16 5.1.17 5.1.18 5.1.19 5.1.20 5.2 Functional description of the stereo decoder . . . . . . . . . . . . . . . . . . . . . . 26 5.2.1 5.2.2 ...

Page 4

Contents 9 Revision history . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . ...

Page 5

TDA7407 List of tables Table 1. Pin Description . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . ...

Page 6

List of figures List of figures Figure 1. Block diagram . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . ...

Page 7

TDA7407 1 Block diagram and pin connections Figure 1. Block diagram Figure 2. Pin connections (top view CDR 1 CDROUT 2 CDGND 3 CDLOUT 4 CDL 5 N.C. 6 ...

Page 8

Block diagram and pin connections Table 1. Pin Description N. Name 1 CDR 2 CDROUT CD output right channel 3 CDGND 4 CDLOUT 5 CDL AFS ...

Page 9

TDA7407 Table 1. Pin Description (continued) N. Name ACINLR 38 ACINRR 39 ACINRF 40 ACINLF 41 VREF 42 CREF 43 TAPEL 44 TAPER Pin type legend Input ; O = Output; I/O = Input/Output; S ...

Page 10

Audio processor part 2 Audio processor part 2.1 List of features 2.1.1 Input multiplexer ● Quasi differential CD and cassette stereo input ● AM mono input ● Phone differential input ● Multiplexer signal after In-Gain available at separate pins 2.1.2 ...

Page 11

TDA7407 2.1.7 Mute functions ● Direct mute ● Digitally controlled softmute with 4 programmable mute time. 2.2 Electrical characteristics . Table 5. Audio processor electrical characteristics ( specified) Symbol Input selector R Input resistance in V ...

Page 12

Audio processor part Table 5. Audio processor electrical characteristics (continued 9V specified) Symbol V DC steps DC Soft mute/AFS A Mute attenuation MUTE T Delay time D V Low threshold for SM-/AFS- Pin TH low V ...

Page 13

TDA7407 Table 5. Audio processor electrical characteristics (continued 9V specified) Symbol Q Quality factor MID Treble control C Control range RANGE A Step resolution STEP f Center frequency C 1. The SM pin is active low ...

Page 14

Stereo decoder part 3 Stereo decoder part Table 6. Stereo decoder electrical characteristics (V = 9V; de-emphasis time constant = 50μs,V S fm= 1KHz 6dB. T Symbol V MPX input level in R Input resistance in G Min. ...

Page 15

TDA7407 Table 6. Stereo decoder electrical characteristics (continued 9V; de-emphasis time constant = 50μs,V S fm= 1KHz 6dB. T Symbol L LEVEL gain step resolution Gstep VSBL Min. voltage for mono min VSBL Min. voltage for ...

Page 16

Stereo decoder part 3.1 Notes to the characteristics: 1. Intermodulation suppression: measured with: 91% pilot signal 10kHz or 13kHz. 2. Traffic radio (V.F.) suppression: measured with: 91% stereo signal; 9% pilot signal 1kHz; 5% subcarrier (f ...

Page 17

TDA7407 4 Noise blanker part nd ● internal 2 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 ● ...

Page 18

Noise blanker part Table 7. Noise blanker electrical characteristics (continued) Symbol Parameter Suppression pulse T S duration Noise rectifier V discharge adjustment RECTADJ (7) SR Noise rectifier charge PEAK Noise rectifier V adjustment through ADJMP multipath 1. All Thresholds are ...

Page 19

TDA7407 Figure 4. Trigger threshold vs.V Figure 5. Deviation controlled trigger adjustment V PEAK ( 2.8 2.0 1.2 0.9 D97AU649 Figure 6. Fieldstrength controlled trigger adjustment V PEAK »3V PEAK VTH MIN. TRIG. THRESHOLD 65mV 8 STEPS 30mV ...

Page 20

Multipath detector 5 Multipath detector ● Internal 19kHz band pass filter ● Programmable band pass and rectifier gain ● two pin solution fully independent usable for external programming ● selectable internal influence on Stereoblend Table 8. Multipath electrical characteristics Symbol ...

Page 21

TDA7407 5.1 Description of the audioprocessor part 5.1.1 Input multiplexer ● CD quasi differential ● Cassette stereo ● Phone differential ● AM mono ● Stereo decoder input. 5.1.2 Input stages Most of the input stages have remained the same as ...

Page 22

Multipath detector 5.1.6 Softmute The digitally controlled softmute stage allows muting/demuting the signal with a I programmable slope. The mute process can either be activated by the softmute pin or by the bus. The slope is realized ...

Page 23

TDA7407 5.1.8 Attenuation (80Hz) Figure 9 shows the attenuation as a function of frequency at a center frequency of 80Hz. 5.1.9 Center frequency (60, 70, 80, 100Hz) Figure 10 shows the four possible center frequencies 60,70,80 and 100Hz. 5.1.10 Quality ...

Page 24

Multipath detector AC Outputs and the AC Input could be used as additional stereo inputs. The input impedance of the AC Inputs is always 50KΩ. 5.1.20 Speaker Attenuator The speaker attenuators have exactely the same structure and range like the ...

Page 25

TDA7407 Figure 13. Mid control @ fc=1kHz, Q=1 15.0 10.0 5.0 0.0 -5.0 -10.0 -15.0 10.0 100.0 1.0K Figure 15. Mid Q factor @ fc=1kHz, Gain=14dB 15.0 12.5 10.0 7.5 5.0 2.5 0.0 10.0 100.0 1.0K Figure 17. Treble center ...

Page 26

Multipath detector 5.2 Functional description of the stereo decoder The stereo decoder part of the TDA7407 (see demodulate the MPX signal like pilot tone dependent MONO/STEREO switching as well as "stereoblend" and "highcut" functions. 5.2.1 Stereo decoder Mute The TDA7407 ...

Page 27

TDA7407 Figure 19. Signals during stereo decoder's softmute Figure 20. Internal Stereoblend characteristics If any other source than the stereo decoder is selected the decoder remains muted and the MPX pin is connected to Vref to avoid any discharge of ...

Page 28

Multipath detector 5.2.4 De-emphasis and Highcut. The lowpass filter for the de-emphasis allows to choose between a time constant of 50μs and 75μs (bit D7, stereo decoder byte). The highcut control range will be in both cases τ range (between ...

Page 29

TDA7407 5.2.7 LEVEL Input and Gain To suppress undesired high frequency modulation on the highcut and stereoblend function the LEVEL signal is lowpass filtered firstly. The filter is a combination of a 1st order RC lowpass at 53kHz (working as ...

Page 30

Multipath detector The block diagram of the noiseblanker is given in In the first stage the spikes must be detected but to avoid wrong triggering on high frequency (white) noise, a complex trigger control is implemented. Behind the trigger stage ...

Page 31

TDA7407 5.3 Automatic threshold control mechanism 5.3.1 Automatic threshold control by the stereoblend voltage Besides the noise controlled threshold adjustment there is an additional possibility for influencing the trigger threshold depending on the stereoblend control. The point where ...

Page 32

Multipath detector Figure 24. Block diagram of the multipath detector 5.4.1 Programming To obtain a good multipath performance an adaptation is necessary. Therefore the gain of the 19kHz bandpass is programmable in four steps as well as the rectifier gain. ...

Page 33

TDA7407 Figure 25. Mute control logic Multipath detector 33/46 ...

Page 34

I2C Bus interface description Bus interface description 6.1 Interface protocol The interface protocol comprises: – a start condition (S) – a chip address byte (the LSB bit determines read / write transmission) – a subaddress byte ...

Page 35

TDA7407 Table 12. Subaddress (receive mode) MSB LSB ...

Page 36

Data byte specification 7 Data byte specification After power on reset all register are set to 11111110 Table 13. Input selector (subaddress 0H) MSB Table ...

Page 37

TDA7407 Table 15. Treble filter (subaddress 2H) MSB Table 16. Bass filter (subaddress 3H) MSB ...

Page 38

Data byte specification Table 17. Soft mute and bass programming (subaddress 8H) MSB Only for Bass Q-Factor = 2.0 Table 18. Stereo decoder ...

Page 39

TDA7407 Table 19. Noiseblanker (subaddress AH) MSB Table 20. High Cut (subaddress BH) MSB ...

Page 40

Data byte specification Table 21. Field strength Control (subaddress CH) MSB Table 22. Configuration (subaddress DH) MSB ...

Page 41

TDA7407 Table 23. Stereo decoder adjustment (subaddress EH) MSB Table 24. Testing (subaddress ...

Page 42

Data byte specification Table 24. Testing (subaddress FH) (continued) MSB Note: This byte is used for testing or evaluation purposes ...

Page 43

TDA7407 Table 25. New quality / control (subaddress 10H) (continued) MSB Table 26. Mid filter (subaddress 11H) MSB LSB 0 1 LSB ...

Page 44

Package information 8 Package information In order to meet environmental requirements, ST offers these devices in ECOPACK® packages. These packages have a lead-free second level interconnect. The category of second level interconnect is marked on the package and on the ...

Page 45

TDA7407 9 Revision history Table 27. Document revision history Date 04-Oct-2004 01-Apr-2005 22-Jan-06 Revision 1 Initial release. 2 Style sheet changed to comply with corporate guidelines. 3 Package change, layout changes, text modifications. Revision history Changes 45/46 ...

Page 46

... Information in this document is provided solely in connection with ST products. STMicroelectronics NV and its subsidiaries (“ST”) reserve the right to make changes, corrections, modifications or improvements, to this document, and the products and services described herein at any time, without notice. All ST products are sold pursuant to ST’s terms and conditions of sale. ...

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