TDA7541W STMicroelectronics, TDA7541W Datasheet
TDA7541W
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TDA7541W Summary of contents
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... 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 – ...
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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 ...
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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 ...
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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 ...
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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 ...
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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 ...
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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 ...
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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 ...
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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 ...
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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 ...
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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 ...
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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 ...
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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 ...
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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 ...
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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 ...
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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 ...
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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 ...
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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 ...
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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 ...
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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 ...
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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 ...
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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 ...
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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 ...
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Functional description Table 10. ISS filter control control bits ...
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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 ...
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Functional description Table 12. ISS control modes Input signals ac ac 4.1.5 Weak signal mute The filtered field strength signal ...
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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 ...
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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) ...
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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 ...
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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 ...
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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 ...
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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 ...
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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 ...
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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 ...
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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 ...
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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 ...
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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 ...
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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 ...
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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 ...
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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 ...
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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 ...
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Software specification 5.3 Data byte specification Table 15. Subaddress description MSB - - Table 16. Addr 0 ...
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TDA7541 Table 17. Addr 1 TPLL Counter 1 (LSB) MSB ...
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Software specification Table 20. Addr 4 TV/IF Counter (FM ACh , AM 1Ch) Addr25 MSB ...
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TDA7541 Table 21. Addr 5 TPLL Divider (FM 3Dh , AM 2Dh) MSB ...
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Software specification Table 22. Addr 6 AGC (FM 06h, AM 2Ah) Addr12 MSB ...
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TDA7541 Table 23. Addr 7 Quality AC (FM 50h) MSB ...
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Software specification Table 24. Addr 8 Quality ACM/MP (FM 6Ah) MSB ...
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TDA7541 Table 25. Addr 9 Quality Dev (FM 49h) MSB ...
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Software specification Table 26. Addr 10 Quality MUX/FSU (FM 0Eh , AM 0Fh) MSB ...
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TDA7541 Table 28. Addr (AM B1h) MSB ...
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Software specification Table 30. Addr 14 IF2 adjust (FM E8h, AM 08h) MSB ...
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TDA7541 Table 31. Addr 15 IQ adjust / Switch (FM E7h) MSB ...
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Software specification Table 32. Addr 16 FM keying AGC (FM 1Dh) MSB ...
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TDA7541 Table 33. Addr 17 Roll off / Level gain (77h) MSB ...
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Software specification Table 34. Addr 18 SD Stereoblend / AM corner frequency (0Dh) MSB ...
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TDA7541 Table 35. Addr 19 SD High cut (2Fh) MSB ...
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Software specification Table 36. Addr (FM 97h, AM 3Fh) MSB ...
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TDA7541 Table 37. Addr 21 SD Quality (FFM 7Ah, AM FAh) MSB ...
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Software specification Table 38. Addr (FM 05h, AM 04h) MSB ...
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TDA7541 Table 39. Addr (FM E2h, AM C2h) MSB ...
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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. ...
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TDA7541 Appendix A Block diagrams Figure 9. Block diagram FM part Doc ID 13686 Rev 4 Block diagrams 67/75 ...
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Block diagrams Figure 10. Block diagram VCO 68/75 Doc ID 13686 Rev 4 TDA7541 ...
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TDA7541 Figure 11. Block diagram ISS function Doc ID 13686 Rev 4 Block diagrams 69/75 ...
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Block diagrams Figure 12. Block diagram AM path 70/75 Doc ID 13686 Rev 4 TDA7541 ...
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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 ...
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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 ...
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TDA7541 Appendix B Application circuit Figure 16. Application circuit Doc ID 13686 Rev 4 Application circuit 73/75 ...
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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 ...
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... 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. ...