TDA7541BW STMicroelectronics, TDA7541BW Datasheet
TDA7541BW
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TDA7541BW Summary of contents
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... VCO for world tuning range Table 1. Device summary Order code TDA7541B TDA7541BTR TDA7541BW TDA7541BWTR July 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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TDA7541B 4.4.1 4.4 bus interface . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . ...
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List of tables List of tables Table 1. Device summary . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . ...
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TDA7541B List of figures Figure 1. Block circuit diagram ...
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Block circuit diagram 1 Block circuit diagram Figure 1. Block circuit diagram 6/77 Doc ID 16048 Rev 1 TDA7541B ...
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TDA7541B 2 Pin connection and pin description 2.1 Pin connection Figure 2. Pin connection (top view) VCCMIX1 DEVTC AMMIX1IN AMRFAGCOUT WB AMMIX1RAF AMPINDR FMMIX1IN1 GNDRF FMMIX1IN2 TV FMPINDR FMAGCTC VCOB VCOE VCCVCO ...
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Pin connection and pin description 2.2 Pin description Table 2. Pin description Pin No. 1 VCCMIX1 2 DEVTC 3 AMMIX1IN 4 AMRFAGCOUT AMMIX1REF 7 AMPINDR 8 FMMIX1IN1 9 GNDRF 10 FMMIX1IN2 FMPINDR 13 FMAGCTC ...
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TDA7541B Table 2. Pin description (continued) Pin No VCC1 37 FSWO 38 GNDSTD 39 MPTC 40 AMREFDEMC 41 MPXIN 42 MUTETC 43 MPXOUT 44 AMIF2REF 45 FMREFDEMC 46 GNDDEM 47 AMIF2IN 48 VREF1 49 GNDVCC2 ...
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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 temperature amb ...
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TDA7541B 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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TDA7541B Table 6. FM section (continued) Item Symbol Parameter 10 output voltage 59 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 ...
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Electrical specifications and characteristics Table 6. FM section (continued) Item Symbol Parameter Signal plus noise-to-noise 12.6 (S+N)/N ratio at MPXOUT Signal plus noise-to-noise ratio 12.7 (S+N)/N In weatherband mode 13. Quality detection Unweighted field strength (FSU) and weighted field strength ...
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TDA7541B Table 6. FM section (continued) Item Symbol Parameter ΔV 13.19 Slope frequency low pass 13. Adjacent channel gain 13.21 G Gain AC Adjacent channel filter 13. frequency highpass ACF=0 ...
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Electrical specifications and characteristics Table 6. FM section (continued) Item Symbol Parameter 14.17 I Discharge current high 30,31 14.18 V Low voltage 30,31 14.19 V High voltage 30,31 ISS filter switch threshold 14.20 V Threshold ISS on 30,31 14.21 V ...
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TDA7541B 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 21.5 C Output capacitance OUT 21 output voltage 52,53 Conversion 21 transconductance 21.8 G Max. gain max Δ 21.9 G Gain control range 21.10 ...
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TDA7541B Table 7. AM section (continued) Item Symbol Parameter 24.4 g Control slope AGC 24 Max. AGC charge current 57 24 Max. AGC charge current 57 24.7 V Max. AGC output voltage 57 24.8 V Min. ...
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Electrical specifications and characteristics Table 8. Stereo decoder section (continued) Item Symbol Parameter 27.7 A channel separation 27.8 THD Total harmonic distortion Signal plus noise to noise 27.9 (S+N)/N ratio 28. Mono/stereo switch 28.1 V Pilot threshold voltage PTHST1 28.2 ...
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TDA7541B Table 8. Stereo decoder section (continued) Item Symbol Parameter 31.9 VHCH Step resolution step 31.10 VHCL Min. voltage for full high cut HCLT min 31.11 VHCL Max. voltage for full high cut HCLT max 31.12 VHCL Step resolution step ...
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Electrical specifications and characteristics Table 8. Stereo decoder section (continued) Item Symbol Parameter Min. fieldstrength 37.10 V PEAKFS controlled peak voltage Max. fieldstrength 37.11 V PEAKFS controlled peak voltage 37.12 T Min. blanking time S 37.13 T Max. blanking time ...
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TDA7541B Table 8. Stereo decoder section (continued) Item Symbol Parameter Max. quality detector 39.2 a coefficient 39.3 b Min. quality noise gain 39.4 b Max. quality noise gain 1. Intermodulation suppression a2 a3 measured with stereo signal; 9 ...
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Electrical specifications and characteristics 3.3.5 PLL section °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 ...
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TDA7541B Table 9. PLL section (continued) Item Symbol Parameter 44. Output of tuning voltage (TV) 44.1 V Output voltage OUT 44 Min. voltage step step 44 Max. voltage offset max Δ 44.4 V Additional offset voltage ...
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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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TDA7541B 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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TDA7541B “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 22 ...
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Functional description Table 12. ISS control modes Input signals ac ac 4.1.5 Strong adjacent channel correction Under strong adjacent channel ...
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TDA7541B 4.1.7 Weather band input If the weather band input is used the chip must be set in FM mode (FMON). In addition to that the ISS filter must be switched ON (ISSENA=”1”), mixer2 quality factor must be set to ...
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Functional description rectifier is programmable (AINBT). A comparator activates a pulse generator. The duration of this pulse is software programmable (AINT) and is smooth blanking out the spikes in mixer2. 4.2.1 Usage of control bit ADSEL (Addr23D7) The control bit ...
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TDA7541B possibility to perform an optimization step during the production of the car radio where the channel separation and the field strength control are trimmed. In addition to that the FM signal can be inverted. De-emphasis and high cut The ...
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Functional description 10k between FSU pin and FSTC pin. The second stage is a programmable gain stage to adapt the VFSTC signal internally. The gain (LG) is widely programmable in 16 steps from 8.25 dB (step=0.55dB). These ...
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TDA7541B Trigger path The incoming FM demodulator output signal is taken in front of the weak signal mute, high pass filtered, amplified and rectified. This second order high pass filter has a corner- frequency of 140 kHz. The rectified signal, ...
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Functional description 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 ...
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TDA7541B 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 time ...
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Functional description 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 ...
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TDA7541B 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 an ...
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Functional description 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 ...
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TDA7541B 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 word ...
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Software specification 5 Software specification 5.1 Chip address and overview The interface protocol comprises: – start condition (S) – chip address byte – sub address byte – sequence of data (N bytes + Acknowledge) – stop condition (P) Receive mode ...
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TDA7541B 5.2 Address organization Table 14. Address organization Function Addr D7 T PLL charge pump 0 SEEK T PLL counter 1 PC7 T PLL counter 2 PC15 TVO7 T TV/IF counter 4 FMON T PLL divider 5 ...
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Software specification 5.3 Control register function 2 Table 15 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 ADSEL Additional selectivity ...
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TDA7541B 2 Table 15 control bit description (continued) Register Name IFS IF counter sampling time IFSEXP Expanded IF counter sampling time ISSBW ISS filter band width select ISSENA ISS filter enable ISSON ISS filter control mode ISSM ISS ...
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Software specification 2 Table 15 control bit description (continued) Register Name PCM Pilot cancellation mode PH IQ mixer phase adjust PTH Pilot detector threshold QDC Stereo decoder quality detector coefficient QNG Stereo decoder quality noise gain RC Tuner ...
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TDA7541B 5.4 Data byte specification Table 16. Subaddress description MSB - - Table 17. Addr 0 TPLL charge pump control (0Bh) ...
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Software specification Table 18. Addr 1 TPLL Counter 1 (LSB) MSB ...
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TDA7541B Table 21. Addr 4 TV/IF Counter (FM ACh, AM 1Ch) Addr25 MSB ...
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Software specification Table 22. Addr 5 TPLL Divider (FM 3Dh, AM 2Dh) MSB ...
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TDA7541B Table 23. Addr 6 AGC (FM 06h, AM 2Ah) Addr12 MSB ...
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Software specification Table 24. Addr 7 Quality AC (FM 50h) MSB ...
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TDA7541B Table 25. Addr 8 Quality ACM/MP (FM 6Ah) MSB ...
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Software specification Table 26. Addr 9 Quality Dev (FM 49h) MSB ...
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TDA7541B Table 27. Addr 10 Quality MUX/FSU (FM 0Eh, AM 0Fh) MSB ...
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Software specification Table 29. Addr (AM B1h) MSB ...
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TDA7541B Table 31. Addr 14 IF2 adjust (FM E8h, AM 08h) MSB ...
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Software specification Table 32. Addr 15 IQ adjust / Switch (FM E7h) MSB ...
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TDA7541B Table 33. Addr 16 FM keying AGC (FM 1Dh) MSB ...
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Software specification Table 34. Addr 17 Roll off / Level gain (77h) MSB ...
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TDA7541B Table 35. Addr 18 SD Stereoblend / AM corner frequency (0Dh) MSB ...
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Software specification Table 36. Addr 19 SD High cut (2Fh) MSB ...
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TDA7541B Table 37. Addr (FM 97h, AM 3Fh) MSB ...
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Software specification Table 38. Addr 21 SD Quality (FFM 7Ah, AM FAh) MSB ...
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TDA7541B Table 39. Addr (FM 05h, AM 04h) MSB ...
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Software specification Table 40. Addr (FM E2h, AM C2h) MSB ...
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TDA7541B Table 41. Addr 24, 26, 27, 28, 29 testing (FEh) MSB Table 42. Addr 25 Testing (FEh) MSB ...
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Appendix 6 Appendix Figure 8. Block diagram FM part 68/77 Doc ID 16048 Rev 1 TDA7541B ...
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TDA7541B Figure 9. Block diagram VCO Doc ID 16048 Rev 1 Appendix 69/77 ...
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Appendix Figure 10. Block diagram ISS function 70/77 Doc ID 16048 Rev 1 TDA7541B ...
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TDA7541B Figure 11. Block diagram AM path Doc ID 16048 Rev 1 Appendix 71/77 ...
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Appendix Figure 12. Block diagram stereo decoder MPXOUT Figure 13. Block diagram audio noise blanker MPXIN 140kHz HPF FMDEMOut (2nd. order) 72/77 MPXIN MPTC FSTC FMON Deviation detector NBDC Integrator discharge control Rectifier NBMP NBPC NBSMP NBRR MPTC Doc ID ...
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TDA7541B Figure 14. Block diagram multi path detection for stereo decoder FSTC MUX FS internal Attack/Decay Rectifier Bandpass 19kHz MPG Doc ID 16048 Rev 1 MPINT MPCC MPFAST/ SEEK Rectifier MPRG MPTC Appendix Stereo blend 73/77 ...
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Application circuit 7 Application circuit Figure 15. Application circuit 74/77 100n GNDVCC2 49 MIX2AMPOUT 50 VCC2 51 MIX2REF 52 180p MIX2OUT 53 1µ AMRFAGCTC 54 100n X2INREF MI 55 MIX2IN 56 2.2µ GC2TC AMA 57 100n IF1REF 58 IF1AMPOUT 59 ...
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TDA7541B 8 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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Revision history 9 Revision history Table 43. Document revision history Date 22-Jul-2009 76/77 Revision 1 Initial release. Doc ID 16048 Rev 1 TDA7541B Changes ...
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... TDA7541B 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. ...