TDA7406TR STMicroelectronics, TDA7406TR Datasheet

IC PROCESSOR CAR SIGNAL 44-TQFP

TDA7406TR

Manufacturer Part Number
TDA7406TR
Description
IC PROCESSOR CAR SIGNAL 44-TQFP
Manufacturer
STMicroelectronics
Type
Car Signal Processorr
Datasheet

Specifications of TDA7406TR

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

Available stocks

Company
Part Number
Manufacturer
Quantity
Price
Part Number:
TDA7406TR
Manufacturer:
STMicroelectronics
Quantity:
10 000
Features
Audio processor
Stereo decoder
Order codes
September 2006
4 Stereo inputs
4 Mono inputs
Volume control
7 Band equalizer filter control
High pass filter for subwoofer
application
Direct mute and soft mute
Internal beep generation
4 Independent speaker outputs
Soft step speaker control
Subwoofer output
7 Band spectrum analyzer
Full mixing capability
Pause detector decoder
RDS mute
No external adjustments
AM/FM noiseblanker with several trigger
controls
Part number
E-TDA7406
Package
TQFP44
Rev 1
Digital control
Description
The TDA7406
processor with 7 bands equalizer and spectrum
analyzer plus a stereo decoder-noiseblanker.
The whole low frequency signal processing
necessary for state-of-the-art as well as future car
radios is therefore provided.
The digital control allows a full programming not
only of the audioprocessor and filter
characteristics but also in the stereodecoder part
especially for the adaptation to different IF-
devices.
Programmable multipath detector
Quality detector output
I
2
C-bus interface
Car radio signal processor
incl
udes a high performance audio
TQFP44
Packing
Tray
TDA7406
www.st.com
1/64
1

Related parts for TDA7406TR

TDA7406TR Summary of contents

Page 1

Features Audio processor ■ 4 Stereo inputs ■ 4 Mono inputs ■ Volume control ■ 7 Band equalizer filter control ■ High pass filter for subwoofer ■ application ■ Direct mute and soft mute ■ Internal beep generation ■ 4 ...

Page 2

Contents Contents 1 Block and pin connection diagram . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7 2 Electrical ...

Page 3

TDA7406 4.8.1 4.9 AC-coupling . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . ...

Page 4

Contents 9.3.2 9.3.3 9.3.4 10 Functional description of the multipath-detector . . . . . . . . . . . . . . . . 42 11 Quality detector . . . . . . . . . . ...

Page 5

TDA7406 List of tables Table 1. Supply . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . ...

Page 6

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

Page 7

TDA7406 1 Block and pin connection diagram Figure 1. Block diagram MIXINLF MIXINLR MIXINRF MIXINRR ACINR ACINL SWIN ACOUTR ACOUTL SWACOUT Block and pin connection diagram 7/64 ...

Page 8

Block and pin connection diagram Figure 2. Pin connection (Top view) 8/64 TDA7406 ...

Page 9

TDA7406 2 Electrical specifications 2.1 Supply Table 1. Supply Symbol Parameter V Supply Voltage S I Supply Current S SVRR Ripple Rejection @ 1kHz 2.2 Thermal data Table 2. Thermal data Symbol R Thermal Resistance Junction-pins th j-pins 2.3 Absolute ...

Page 10

Audioprocessor part 3 Audioprocessor part 3.1 Features: ● Input multiplexer – Pseudo differential CDC stereo input, programmable as single-ended input. – 3 single-ended stereo inputs. – 4single-ended mono inputs. – Input gain adjust 0...15dB in 1dB steps. – Internal offset-cancellation ...

Page 11

TDA7406 – Single-ended monaural output – control range 95dB (+15...-79dB) in 1dB steps with soft step. – separate mute ● Mute functions – direct mute – digitally controlled Soft mute with 4 programmable mute-time 3.2 Audioprocessor electrical characteristics Table 4. ...

Page 12

Audioprocessor part Table 4. Audioprocessor electrical characteristics (continued) (V =9V; T =25° amb Symbol Parameter MIXING CONTROL M Mixing Ratio LEVEL G Max. Gain MAX A Max. Attenuation MAX A Attenuation Step STEP LOUDNESS CONTROL A Step Resolution ...

Page 13

TDA7406 Table 4. Audioprocessor electrical characteristics (continued) (V =9V; T =25° amb Symbol Parameter SOFT MUTE A Mute Attenuation MUTE T Delay Time D V Low Threshold for SM-Pin TH low V High Threshold for SM - Pin ...

Page 14

Audioprocessor part Table 4. Audioprocessor electrical characteristics (continued) (V =9V; T =25° amb Symbol Parameter f Center Frequency Band Center Frequency Band Center Frequency Band Center Frequency Band 6 ...

Page 15

TDA7406 Table 4. Audioprocessor electrical characteristics (continued) (V =9V; T =25° amb Symbol Parameter HIGH PASS f Highpass corner frequency HP SUBWOOFER ATTENUATOR R Input Impedance in G Max. Gain MAX A Max. Attenuation ATTN A Step Resolution ...

Page 16

Description of the audioprocessor part 4 Description of the audioprocessor part 4.1 Input stages In the basic configuration there is a source-Selector with 8 inputs: one pseudo-differential (CDC), three single ended stereo (MD, CD, Tape), three single-ended mono (PHONE, NAVI, ...

Page 17

TDA7406 Figure 3. Input-stages 4.2 AutoZero The AutoZero allows a reduction of the number of pins as well as external components by canceling any offset generated by or before the In-Gain-stage (Please notice that externally generated offsets, e.g. generated through ...

Page 18

Description of the audioprocessor part The root cause of this procedure is, that after muting the stereodecoder (Step 1), the internal stereodecoder filters have to settle in order to perform a proper offset-cancellation. 4.2.2 AutoZero-Remain In some cases, for example ...

Page 19

TDA7406 Figure 4. Loudness Attenuation @ f 0.0 -5.0 -10.0 dB -15.0 -20.0 -25.0 10.0 Figure 5. Loudness Center frequencies @ Attn. = 15dB 0.0 -5.0 dB -10.0 -15.0 -20.0 10.0 Figure 6. 1st and 2nd Order Loudness @ Attn. ...

Page 20

Description of the audioprocessor part 4.4 Soft Mute The digitally controlled Soft Mute stage allows signal muting/demutingwith a programmable slope. The Mute time is selectable among 4 values: 0.48, 0.96, 123 and 324ms. The mute process can either be activated ...

Page 21

TDA7406 Figure 8. SoftStep-Timing for Volume 1dB 0.5dB -0.5dB -1dB Note: For steps more than 0.5dB (Volume) or 1dB (Speaker) the SoftStep mode should be deactivated because it could generate a hard 1dB step during blending. 4.6 The Seven Band ...

Page 22

Description of the audioprocessor part Figure 9. Equalizer filter control @ -10 -15 Figure 10. Center frequencies @ Gain = 15dB 1 ...

Page 23

TDA7406 Figure 12. Superposition of all EQ bands @ boost = 15dB 4.6.2 DC-Mode The filter stage 1 (62/100Hz) has a programmable +4dB DC-gain when the boost is ...

Page 24

Description of the audioprocessor part cutoff frequencies are not equal but shifted by the factor 1.125 to get a flat frequency response (see Figure Figure 14. Subwoofer Application with Lowpass @ 80/120/160Hz and HighPass @ 90/135/180Hz 0.0 -10.0 -20.0 dB ...

Page 25

TDA7406 Figure 15. Spectrum analyzer block diagram Figure 16. Timing spectrum analyzer 4.9 AC-coupling In some applications additional signal manipulations are desired. For this purpose an AC- coupling is placed before the speaker-attenuators, which can be activated or internally shorted ...

Page 26

Description of the audioprocessor part Figure 17. AC/DC-coupling and Mix 4.10 Speaker-Attenuator stage Each of the four speakers and the subwoofer output has a separate volume control in the range: +15... -79dB plus mute with a typical value of -90dB. ...

Page 27

TDA7406 5 Stereodecoder part 5.1 Features: ● No external components necessary ● PLL with adjustment free, fully integrated VCO ● Automatic pilot dependent MONO/STEREO switching ● Very high suppression of intermodulation and interference ● Programmable Roll-Off compensation ● Dedicated RDS-Softmute ...

Page 28

Stereodecoder part Table 5. Stereodecoder electrical characteristics (continued 9V, de-emphasis time constant = 50µs, MPX input voltage VMPX = 500mV (75kHz S deviation), modulation frequency = 1kHz, input gain = 6dB, T otherwise specified. Symbol Parameter PLL Δf/f ...

Page 29

TDA7406 Table 5. Stereodecoder electrical characteristics (continued 9V, de-emphasis time constant = 50µs, MPX input voltage VMPX = 500mV (75kHz S deviation), modulation frequency = 1kHz, input gain = 6dB, T otherwise specified. Symbol Parameter Intermodulation (Note 1) ...

Page 30

Stereodecoder part 5.3 Dual MPX Usage 0.0.1 Feature Description The TDA7406 is able to support a twin tuner concept via the Dual-MPX-Mode. The DC- Voltage at the CMPX-pin controls whether one or both MPX-signals are used to decode the stereo ...

Page 31

TDA7406 6 Noise blanker part 6.1 Features: ● AM and FM mode ● internal 2nd order 140kHz high-pass filter for MPX path ● internal rectifier and filters for AM-IF path ● programmable trigger thresholds ● trigger threshold dependent on high ...

Page 32

Noise blanker part Table 6. Noise blanker electrical characteristics (continued) All parameters measured in FM mode if not otherwise specified. Symbol Parameter Fieldstrength V controlled Rectifier FS RECT Voltage T Suppression Pulse Duration FM SFM T Suppression Pulse Duration AM ...

Page 33

TDA7406 Figure 20. Trigger Threshold vs. V 65m 30m V Figure 21. Deviation Controlled Trigger Adjustment Figure 22. Fieldstrength Controlled Trigger Adjustment ≈ ...

Page 34

Multipath detector 7 Multipath detector 7.1 Features: ● internal 19kHz band-pass filter ● programmable band-pass- and rectifier-gain ● selectable internal influence on Stereoblend and/or Highcut 7.2 Multipath detector electrical characteristics Table 7. Multipath detector electrical characteristics Symbol Parameter Center frequency ...

Page 35

TDA7406 8 Functional Description of Stereodecoder Figure 23. Block diagram of the stereodecoder The stereodecoder-part of the TDA7406 (see Fig. 25) contains all functions necessary to demodulate the MPX-signal like pilot tone-dependent MONO/STEREO-switching as well as “stereoblend” and “highcut”. Adaptations ...

Page 36

Functional Description of Stereodecoder Figure 24. Signals during stereodecoder's SoftMute Figure 25. Signal-Control via SoftMute-Pin 8.2 InGain + InFilter The InGain stage allows to adjust the MPX-signal to an internal magnitude of about 1V which is the recommended value. The ...

Page 37

TDA7406 8.4 De-emphasis and Highcut The de-emphasis-lowpass allows to choose a time constant between 37.5 and 100µs. The highcut control range will τ constant (see programming section). The bit D7 of the hightcut-byte will shift time constant ...

Page 38

Functional Description of Stereodecoder between 0dB and the maximum separation. Internally this control range has a fixed upper limit which is the internal reference voltage REF5V. The lower limit can be programmed between 20 and 70% of REF5V in 3.3% ...

Page 39

TDA7406 Figure 28. Highcut characteristics Functional Description of Stereodecoder 39/64 ...

Page 40

Functional description of the noiseblanker 9 Functional description of the noiseblanker In the automotive environment the MPX-signal as well as the AM-signal is disturbed by spikes produced by the ignition and other radiating sources like the wiper-motor. The aim of ...

Page 41

TDA7406 9.3 Additional Threshold Control Mechanism 9.3.1 Automatic Threshold Control by the Stereoblend voltage Besides the noise controlled threshold adjustment there is an additional possibility for influencing the trigger threshold which depends on the stereoblend control. The point where the ...

Page 42

Functional description of the multipath-detector 10 Functional description of the multipath-detector Using the Multipath-Detector the audible effects of a multipath condition can be minimized. A multipath-condition is detected by rectifying the spectrum around 19kHz in the fieldstrength signal. An external ...

Page 43

TDA7406 11 Quality detector The TDA7406 offers a quality detector output which gives a voltage representing the FM- reception conditions. To calculate this voltage the MPX-noise and the multipath-detector output are summed according to the following formula: The noise-signal is ...

Page 44

Testmode 12 Testmode During the Testmode, which can be activated by setting bit I2 of the subaddress byte and bit D1 of the stereodecoder testing-byte, several internal signals are available at the FD2R+ pin. During this mode the input resistance ...

Page 45

TDA7406 bus interface 13.1 Interface Protocol The interface protocol comprises: – a start condition (S) – a chip address byte (the LSB bit determines read / write transmission) – a subaddress byte – a sequence of ...

Page 46

I2C bus interface 13.2 Subaddress (receive mode) Table 8. Subaddress (receive mode) MSB 46/64 LSB ...

Page 47

TDA7406 13.3 Data byte specification The status after Power-On-Reset is marked bold-face / underlined in the programming tables. Table 9. Input Selector (0) MSB ...

Page 48

I2C bus interface Table 11. Volume (2) MSB ...

Page 49

TDA7406 Table 13. Mixing Programming (10) MSB Table 14. SoftMute (11) MSB LSB ...

Page 50

I2C bus interface Table 15. Subwoofer Configuration / Spectrum Analyzer / HighPass (12) MSB Table 16. Configuration Audioprocessor I (13) MSB ...

Page 51

TDA7406 Table 16. Configuration Audioprocessor I (13) (continued) MSB Table 17. Configuration Audioprocessor II (14) MSB ...

Page 52

I2C bus interface Table 18. Speaker and Subwoofer Level Control (15,16,17,18,19) MSB ...

Page 53

TDA7406 Table 20. Testing Audioprocessor (21) MSB Note: This byte is used for testing or evaluation purposes only and must not set to other values than “11111110” in ...

Page 54

I2C bus interface Table 21. Stereodecoder (22) (continued) MSB De-emphasis-Shift enabled (Subaddr.26/Bit7 = 0) Table 22. Noiseblanker I (23) MSB D D ...

Page 55

TDA7406 Table 23. Noiseblanker II (24) MSB Table 24 FM-Noiseblanker (25) MSB ...

Page 56

I2C bus interface Table 25. High-Cut (26) MSB 56/64 LSB High-Cut 0 off 1 ...

Page 57

TDA7406 Table 26. Fieldstrength Control (27) MSB Table 27. Multipath Detector (28) MSB LSB D D ...

Page 58

I2C bus interface Table 27. Multipath Detector (28) (continued) MSB Table 28. Stereodecoder Adjustment (29) MSB ...

Page 59

TDA7406 Table 29. Stereodecoder Configuration (30) MSB Using the Multipath Time-Constants for Stereo-Bland and High-Cut Table 30. Testing Stereodecoder(31) MSB ...

Page 60

I2C bus interface Table 30. Testing Stereodecoder(31) (continued) MSB Note: This byte is used for testing or evaluation purposes only and must not be set to other values than “11111100” in ...

Page 61

TDA7406 14 Application diagram Figure 31. Application Diagram Application diagram 61/64 ...

Page 62

Package information 15 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 63

TDA7406 16 Revision history Table 31. Document revision history Date 04-Sep-2006 Revision 1 Initial release. Revision history Changes 63/64 ...

Page 64

... 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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