TDA7541W STMicroelectronics, TDA7541W Datasheet

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TDA7541W

Manufacturer Part Number
TDA7541W
Description
IC TUNER AM/FM CAR RADIO 64-LQFP
Manufacturer
STMicroelectronics
Datasheet

Specifications of TDA7541W

Modulation Or Protocol
AM, FM
Applications
Automotive Audio
Current - Receiving
48mA
Data Interface
PCB, Surface Mount
Antenna Connector
PCB, Surface Mount
Voltage - Supply
7.7 V ~ 9 V
Operating Temperature
-40°C ~ 85°C
Package / Case
64-LQFP
Lead Free Status / RoHS Status
Lead free / RoHS Compliant
Features
-
Frequency
-
Sensitivity
-
Memory Size
-
Data Rate - Maximum
-
Lead Free Status / Rohs Status
Compliant

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Features
Table 1.
June 2009
FM part
– AGC generation by RF and IF detection
– I/Q mixer for 1
– Mixer for 2
– Internal 450 kHz band pass filter with
– Fully integrated FM demodulator with noise
AM part
– Wide and narrow AGC generation
– Mixer for 1
– Mixer for 2
– Integrated AM-demodulator
– AM IF noise blanking
Stereo decoder
– PLL with adjustment free, fully integrated
– Automatic pilot dependent
– Programmable ROLL-OFF compensation
– High cut and stereo blend-characteristics
– Dedicated RDS mute
– Audio noise blanker
Additional features
– VCO for world tuning range
rejection
bandwidth control by ISS
cancellation
VCO
MONO/STEREO switching
programmable
TDA7541WTR
TDA7541TR
Order code
TDA7541W
Device summary
TDA7541
st
nd
nd
IF 10.7 MHz, AM upconversion
IF 450 kHz
IF 450 kHz
st
IF 10.7 MHz with image
AM/FM car-radio tuner IC with stereo decoder
LQFP64 (10 x 10 x 1.4 mm)
LQFP64 (10 x 10 x 1.4 mm)
LQFP64 (14 x 14 x 1.4 mm)
LQFP64 (14 x 14 x 1.4 mm)
Doc ID 13686 Rev 4
Package
and intelligent selectivity system
Description
The TDA7541 is a high performance tuner circuit
with stereo decoder for AM/FM car radio. It
contains a mixer, IF amplifier, demodulator for AM
and FM, stereo decoder, quality detection, ISS
filter and PLL synthesizer with IF counter on a
single chip. Use of BICMOS technology allows the
implementation of several tuning functions and a
minimum of external components.
– High performance fast PLL for RDS-
– IF counter for FM and AM with search stop
– Quality detector for level, deviation,
– ISS (Intelligent selectivity system) for
– Adjacent channel mute
– Fully electronic alignment
– Independend weather band input
– All functions I
System
signal
adjacent channel and multipath
cancellation of adjacent channel and noise
influences
2
LQFP64
C bus controlled
Tape and reel
Tape and reel
Packing
Tray
Tray
TDA7541
www.st.com
1/75
1

Related parts for TDA7541W

TDA7541W Summary of contents

Page 1

... VCO for world tuning range Table 1. Device summary Order code TDA7541 TDA7541TR TDA7541W TDA7541WTR June 2009 AM/FM car-radio tuner IC with stereo decoder and intelligent selectivity system – High performance fast PLL for RDS- System – IF counter for FM and AM with search stop signal – ...

Page 2

Contents Contents 1 Block circuit diagram . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . ...

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TDA7541 2 4 bus interface . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . ...

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List of tables List of tables Table 1. Device summary . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . ...

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TDA7541 List of figures Figure 1. Block circuit diagram ...

Page 6

Block circuit diagram 1 Block circuit diagram Figure 1. Block circuit diagram 6/75 Doc ID 13686 Rev 4 TDA7541 ...

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TDA7541 2 Pin connection and pin description 2.1 Pin connections Figure 2. Pin connections (top view) VCCMIX1 DEVTC AMMIX1IN AMRFAGCOUT WB AMMIX1RAF AMPINDR FMMIX1IN1 GNDRF FMMIX1IN2 TV FMPINDR FMAGCTC VCOB VCOE VCCVCO 2.2 Pin description Table 2. Pin description Pin ...

Page 8

Pin connection and pin description Table 2. Pin description (continued) Pin No AMMIX1REF 7 AMPINDR 8 FMMIX1IN1 9 GNDRF 10 FMMIX1IN2 FMPINDR 13 FMAGCTC 14 VCOB 15 VCOE 16 VCCVCO 17 GNDVCO 18 LPOUT ...

Page 9

TDA7541 Table 2. Pin description (continued) Pin No. 40 AMREFDEMC 41 MPXIN 42 MUTETC 43 MPXOUT 44 AMIF2REF 45 FMREFDEMC 46 GNDDEM 47 AMIF2IN 48 VREF1 49 GNDVCC2 50 MIX2AMPOUT 51 VCC2 52 MIX2REF 53 MIX2OUT 54 AMRFAGCTC 55 MIX2INREF ...

Page 10

Electrical specifications and characteristics 3 Electrical specifications and characteristics 3.1 Thermal data Table 3. Thermal data Symbol R Thermal resistance junction to ambient TH(j-amb) 3.2 Absolute maximum ratings Table 4. Absolute maximum ratings Symbol V Supply voltage S T Ambient ...

Page 11

TDA7541 Table 5. Globals (continued) Item Symbol Parameter 1.10 I Supply current CCVCO 1.11 I Supply current CCMIX1 1.12 I Supply current CCMIX1 1.13 I Supply current CCIF 2. Reference voltages 2.1 V Internal reference voltage REF1 2.2 V Internal ...

Page 12

Electrical specifications and characteristics Table 6. FM section (continued) Item Symbol Parameter 6.2 V Min. AGC output voltage 13 6.3 I Min. AGC charge current 13 Max. AGC discharge 6 current 7. AGC PIN diode driver output 7.1 ...

Page 13

TDA7541 Table 6. FM section (continued) Item Symbol Parameter 10.7 G Min. gain min 10.8 G Max. gain max Equivalent input noise 10.9 INOISE voltage 10. compression point 1dB rd 10.11 IIP3 3 order Intermodulation 11. Mixer2 ...

Page 14

Electrical specifications and characteristics Table 6. FM section (continued) Item Symbol Parameter Signal plus noise-to-noise ratio 12.5 (S+N)/N In weatherband mode 13. Quality detection Unweighted field strength (FSU) and weighted field strength 13 output voltage 37 13.2 V ...

Page 15

TDA7541 Table 6. FM section (continued) Item Symbol Parameter Adjacent channel gain 13.21 G Gain AC Adjacent channel filter 13. frequency highpass ACF=0 HP 13.23 f Attenuation 20dB -20dB 13.24 f Centre frequency BP Multipath channel gain ...

Page 16

Electrical specifications and characteristics Table 6. FM section (continued) Item Symbol Parameter ISS filter switch threshold 14.20 V Threshold ISS on 30,31 14.21 V Threshold ISS off 30,31 14.22 V Threshold ISS narrow on 30,31 14.23 V Threshold ISS narrow ...

Page 17

TDA7541 3.3.3 AM section °C, V amb CC1 MHz 30 Table 7. AM section Item Symbol Parameter 17. Global 17.1 V Usable sensitivity ANT_US 17.2 (S+N)/N Signal to Noise Ratio ...

Page 18

Electrical specifications and characteristics Table 7. AM section (continued) Item Symbol Parameter 21. AM mixer2 21.1 R Input resistance IN 21.2 C Input capacitance IN 21 input voltage 55.56 21.4 R Output resistance OUT 21.5 C Output capacitance ...

Page 19

TDA7541 Table 7. AM section (continued) Item Symbol Parameter 24. AMAGC2 24.1 V AGC start voltage (PIN47) AGC(start) Δ 24.2 AGC AGC2 range 24.3 g Control slope AGC 24.4 g Control slope AGC 24 Max. AGC charge current ...

Page 20

Electrical specifications and characteristics 3.3.4 Stereo decoder °C, V amb CC1 V = 500 mV MPX rms otherwise specified. Table 8. Stereo decoder section Item Symbol Parameter 27. Stereo decoder 27.1 Vin MPX input level 27.2 27.3 ...

Page 21

TDA7541 Table 8. Stereo decoder section (continued) Item Symbol Parameter 30.6 A Max. Attenuation in AM Ammax 31. Stereo blend and high cut control 31.1 LG Min. level gain min 31.2 LG Max. level gain max 31.3 LG Level gain ...

Page 22

Electrical specifications and characteristics Table 8. Stereo decoder section (continued) Item Symbol Parameter Min. noise controlled 37.3 V TRNOISE trigger threshold Max. noise controlled 37.4 V TRNOISE trigger threshold 37.5 V Peak voltage PEAK 37.6 V Peak voltage PEAK 37.7 ...

Page 23

TDA7541 Table 8. Stereo decoder section (continued) Item Symbol Parameter 38. Multipath detector 38.1 G Min. multipath gain MP 38.2 G Max. multipath gain MP 38.3 G Min. rectifier gain RECTMP 38.4 G Max. rectifier gain RECTMP 38.5 I Rectifier ...

Page 24

Electrical specifications and characteristics 3.3.5 PLL °C, V amb CC1 V = 500 mV MPX rms otherwise specified. Table 9. PLL section Item Symbol Parameter 40. Voltage controlled oscillator (VCO) 40.1 f Min. VCO frequency VCOmin 40.2 ...

Page 25

TDA7541 Table 9. PLL section (continued) Item Symbol Parameter 43.6 I Output current, source OUT 44. Output of tuning voltage (TV) 44.1 V Output voltage OUT 44 Min. voltage step step 44 Max. voltage offset max ...

Page 26

Functional description 4 Functional description 4.1 FM part 4.1.1 Mixer 1 AGC and IF amplifier FM quadrate I/Q-mixer converts IF1 of 10.7 MHz. The mixer provides inherent image rejection and wide dynamic range with low noise and ...

Page 27

TDA7541 Adjacent channel detector The input of the adjacent channel detector is AC coupled from VFSW. A programmable high-pass or band-pass (ACF) as well as rectifier generate a signal which is compared with adjustable threshold (ACTH). The output signals of ...

Page 28

Functional description Table 10. ISS filter control control bits ...

Page 29

TDA7541 “0”: 120 kHz The bit has only influence if bit BWENA is “1” bit ISSON is “1” WBON Weather band enable “1”: Weather band enable (FMmixer1 is disabled, Wbmixer1enabled, stereo decoder gain 26dB, ISS filter bandwidth 24 ...

Page 30

Functional description Table 12. ISS control modes Input signals ac ac 4.1.5 Weak signal mute The filtered field strength signal ...

Page 31

TDA7541 The AMIF2 block contains mixer2, IF2 amplifier, demodulator and AGC2 The AM/FM mixer2 converts 10.7 MHz IF1 into 450 kHz IF2. Mixer2 output passes a 450 kHz narrow band filter (LC plus ceramic filter). LC centre frequency is adjustable ...

Page 32

Functional description Deemphasis and high cut The deemphasis low pass allows to choose between a time constant of 50 µs/75 µs (DEEMP). The high cut control range will be in both cases T cut control range (between VHCHT and VHCLT) ...

Page 33

TDA7541 compensation bits in byte 14 to simplify a possible adaptation during the production of the car radio. Stereo blend control The stereo blend control block converts the internal LEVEL-voltage into a demodulator compatible analog signal, which is used to ...

Page 34

Functional description frequency of 140 kHz. The rectified signal, VRECT, is low pass filtered to generate a signal called V . Noise with a frequency above 140 kHz increases the V PEAK resulting voltage can be adjusted by use of ...

Page 35

TDA7541 Figure 6. Stereo blend controlled threshold adjust V PEAK ≈ 3V NOISE Automatic deviation controlled threshold adjustment If the system is tuned to stations with a high deviation the noise blanker can trigger on the higher frequencies of the ...

Page 36

Functional description Noise blanker in AM mode In AM mode the noise blanker is activated if a spike on the audio signal is bigger than a fixed threshold. In order to blank the whole spike in AM mode the hold ...

Page 37

TDA7541 4.4 PLL and IF counter section 4.4.1 PLL frequency synthesizer block This part contains a frequency synthesizer and a loop filter for radio tuning system. Only one VCO is required to build a complete PLL system for FM world ...

Page 38

Functional description Low noise CMOS op-amp An internal voltage divider at pin 19 connects the positive input of the low noise op-amp. The charge pump output connects the negative input. This internal amplifier in cooperation with external components can provide ...

Page 39

TDA7541 Data transition Data transition on the SDA line must only occur when the clock SCL is LOW. SDA transitions while SCL is HIGH will be interpreted as START or STOP condition. Start condition A start condition is defined by ...

Page 40

Functional description Write operation Following a START condition the master sends a slave address word with the R/W bit set to "0". The device will generate an "acknowledge" after this first transmission and will wait for a second word (the ...

Page 41

TDA7541 5 Software specification 7.1 Chip address and overview The interface protocol comprises: – - start condition (S) – - chip address byte – - sub address byte – - sequence of data (N bytes + Acknowledge) – - stop ...

Page 42

Software specification Table 13. Address organization (continued) Function Addr D7 T Weak signal mute 11 WMD7 IFAGCS T XTAL adjust 13 SL7 T IF adjust 14 IF1G7 T IQ adjust/Switch 15 DSB7 T FM keying ...

Page 43

TDA7541 5.2 Control register function 2 Table 14 control bit description Register name ACF Adjacent channel detector filter select ACMD Adjacent channel mute depth ACMTH Adjacent channel mute threshold ACTH Adjacent channel detector threshold AINENA AM IF noise ...

Page 44

Software specification 2 Table 14 control bit description (continued) Register name IFSEXP Expanded IF counter sampling time ISSBW ISS filter band width select ISSENA ISS filter enable ISSON ISS filter control mode ISSM ISS filter application mode KAGC ...

Page 45

TDA7541 2 Table 14 control bit description (continued) Register name PH IQ mixer phase adjust PTH Pilot detector threshold QDC Stereo decoder quality detector coefficient QNG Stereo decoder quality noise gain RC Tuner PLL reference counter RFAGC FM/AM ...

Page 46

Software specification 5.3 Data byte specification Table 15. Subaddress description MSB - - Table 16. Addr 0 ...

Page 47

TDA7541 Table 17. Addr 1 TPLL Counter 1 (LSB) MSB ...

Page 48

Software specification Table 20. Addr 4 TV/IF Counter (FM ACh , AM 1Ch) Addr25 MSB ...

Page 49

TDA7541 Table 21. Addr 5 TPLL Divider (FM 3Dh , AM 2Dh) MSB ...

Page 50

Software specification Table 22. Addr 6 AGC (FM 06h, AM 2Ah) Addr12 MSB ...

Page 51

TDA7541 Table 23. Addr 7 Quality AC (FM 50h) MSB ...

Page 52

Software specification Table 24. Addr 8 Quality ACM/MP (FM 6Ah) MSB ...

Page 53

TDA7541 Table 25. Addr 9 Quality Dev (FM 49h) MSB ...

Page 54

Software specification Table 26. Addr 10 Quality MUX/FSU (FM 0Eh , AM 0Fh) MSB ...

Page 55

TDA7541 Table 28. Addr (AM B1h) MSB ...

Page 56

Software specification Table 30. Addr 14 IF2 adjust (FM E8h, AM 08h) MSB ...

Page 57

TDA7541 Table 31. Addr 15 IQ adjust / Switch (FM E7h) MSB ...

Page 58

Software specification Table 32. Addr 16 FM keying AGC (FM 1Dh) MSB ...

Page 59

TDA7541 Table 33. Addr 17 Roll off / Level gain (77h) MSB ...

Page 60

Software specification Table 34. Addr 18 SD Stereoblend / AM corner frequency (0Dh) MSB ...

Page 61

TDA7541 Table 35. Addr 19 SD High cut (2Fh) MSB ...

Page 62

Software specification Table 36. Addr (FM 97h, AM 3Fh) MSB ...

Page 63

TDA7541 Table 37. Addr 21 SD Quality (FFM 7Ah, AM FAh) MSB ...

Page 64

Software specification Table 38. Addr (FM 05h, AM 04h) MSB ...

Page 65

TDA7541 Table 39. Addr (FM E2h, AM C2h) MSB ...

Page 66

Package information 6 Package information In order to meet environmental requirements, ST offers these devices in different grades of ® ECOPACK packages, depending on their level of environmental compliance. ECOPACK specifications, grade definitions and product status are available at: www.st.com. ...

Page 67

TDA7541 Appendix A Block diagrams Figure 9. Block diagram FM part Doc ID 13686 Rev 4 Block diagrams 67/75 ...

Page 68

Block diagrams Figure 10. Block diagram VCO 68/75 Doc ID 13686 Rev 4 TDA7541 ...

Page 69

TDA7541 Figure 11. Block diagram ISS function Doc ID 13686 Rev 4 Block diagrams 69/75 ...

Page 70

Block diagrams Figure 12. Block diagram AM path 70/75 Doc ID 13686 Rev 4 TDA7541 ...

Page 71

TDA7541 Figure 13. Block diagram stereo decoder MPXOUT Figure 14. Block diagram audio noise blanker MPXIN 140kHz HPF FMDEMOut (2nd. order) MPXIN MPTC FSTC FMON Deviation detector NBDC Integrator discharge control Rectifier NBMP NBPC NBSMP NBRR MPTC Doc ID 13686 ...

Page 72

Block diagrams Figure 15. Block diagram multi path detection for stereo decoder FSTC MUX FS internal 72/75 Attack/Decay Rectifier Bandpass 19kHz MPG Doc ID 13686 Rev 4 MPINT MPCC MPFAST/ SEEK Rectifier MPRG MPTC TDA7541 Stereo blend ...

Page 73

TDA7541 Appendix B Application circuit Figure 16. Application circuit Doc ID 13686 Rev 4 Application circuit 73/75 ...

Page 74

Revision history 7 Revision history Table 42. Document revision history Date 19-Jul-2007 9-Jan-2008 15-Jan-2008 25-Jun-2009 74/75 Revision 1 Initial release. Updated the Figure 1: Block circuit Updated/added the values in the characteristics. 2 Updated the Section 5.3: Data byte Updated ...

Page 75

... TDA7541 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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