TDA7541BW

TDA7541B AM/FM car radio tuner IC with stereo decoder and intelligent selectivity system Features ■ FM part – AGC generation by RF and IF detection – I/Q mixer for 1st IF 10.7 MHz with image rejection – Mixer for 2nd IF 450 kHz – Internal 450 kHz band pass filter with bandwidth control by ISS – Fully integrated FM demodulator with noise cancellation ■ AM part – Wide and narrow AGC generation – Mixer for 1st IF 10.7 MHz, AM up conversion – Mixer for 2nd IF 450 kHz – Integrated AM-demodulator – AM IF noise blanking ■ Stereo decoder – PLL with adjustment free, fully integrated VCO – Automatic pilot dependent MONO/STEREO switching – Programmable ROLL-OFF compensation – High cut and stereo blend-characteristics programmable – Dedicated RDS mute – Audio noise blanker ■ Additional features – VCO for world tuning range Table 1. LQFP64 – High performance fast PLL for RDSSystem – IF counter for FM and AM with search stop signal – Quality detector for level, deviation, adjacent channel and multipath – ISS (Intelligent selectivity system) for cancellation of adjacent channel and noise influences – Adjacent channel mute – Fully electronic alignment – Independent weather band input – All functions I2C bus controlled Description The TDA7541B 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. Device summary Order code Package Packing TDA7541B LQFP64 (10 x 10 x 1.4 mm) Tray TDA7541BTR LQFP64 (10 x 10 x 1.4 mm) Tape and reel TDA7541BW LQFP64 (14 x 14 x 1.4 mm) Tray TDA7541BWTR LQFP64 (14 x 14 x 1.4 mm) Tape and reel September 2013 Doc ID 16048 Rev 2 1/77 www.st.com 1 Contents TDA7541B Contents 1 Block circuit diagram . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6 2 Pin connection and pin description . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7 3 4 2.1 Pin connection . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7 2.2 Pin description . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8 Electrical specifications and characteristics . . . . . . . . . . . . . . . . . . . . 10 3.1 Thermal data . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10 3.2 Absolute maximum ratings . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10 3.3 Electrical characteristics . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10 3.3.1 Globals . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10 3.3.2 FM section . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11 3.3.3 AM section . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 17 3.3.4 Stereo decoder section . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 19 3.3.5 PLL section . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 24 Functional description . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 26 4.1 4.2 FM part . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 26 4.1.1 Mixer 1 AGC and IF amplifier . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 26 4.1.2 Mixer2, limiter, FM demodulator and spike cancellation . . . . . . . . . . . . 26 4.1.3 Quality detection and ISS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 26 4.1.4 Block diagram quality detection principle . . . . . . . . . . . . . . . . . . . . . . . . 29 4.1.5 Strong adjacent channel correction . . . . . . . . . . . . . . . . . . . . . . . . . . . . 30 4.1.6 Weak signal mute . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 30 4.1.7 Weather band input . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 31 AM section . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 31 4.2.1 4.3 4.4 2/77 Usage of control bit ADSEL (Addr23D7) . . . . . . . . . . . . . . . . . . . . . . . . 32 Stereo decoder . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 32 4.3.1 Decoder . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 32 4.3.2 Noise blanker . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 34 4.3.3 Functional description of the multipath detector . . . . . . . . . . . . . . . . . . 37 4.3.4 Quality detector . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 37 4.3.5 AFS control and stereo decoder mute . . . . . . . . . . . . . . . . . . . . . . . . . . 37 PLL and IF counter section . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 38 Doc ID 16048 Rev 2 TDA7541B Contents 4.5 5 4.4.1 PLL frequency synthesizer block . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 38 4.4.2 IF counter block . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 39 I2C bus interface . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 39 Software specification . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 42 5.1 Chip address and overview . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 42 5.2 Address organization . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 43 5.3 Control register function . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 44 5.4 Data byte specification . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 47 6 Appendix . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 68 7 Application circuit . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 74 8 Package information . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 75 9 Revision history . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 76 Doc ID 16048 Rev 2 3/77 List of tables TDA7541B List of tables Table 1. Table 2. Table 3. Table 4. Table 5. Table 6. Table 7. Table 8. Table 9. Table 10. Table 11. Table 12. Table 13. Table 14. Table 15. Table 16. Table 17. Table 18. Table 19. Table 20. Table 21. Table 22. Table 23. Table 24. Table 25. Table 26. Table 27. Table 28. Table 29. Table 30. Table 31. Table 32. Table 33. Table 34. Table 35. Table 36. Table 37. Table 38. Table 39. Table 40. Table 41. Table 42. Table 43. 4/77 Device summary . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1 Pin description . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8 Thermal data. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10 Absolute maximum ratings . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10 Globals . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10 FM section . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11 AM section . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 17 Stereo decoder section . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 19 PLL section . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 24 ISS filter control by I2C bus. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 28 Internal ISS control signals . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 29 ISS control modes . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 30 Usage of ADSEL. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 32 Address organization . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 43 I2C control bit description . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 44 Subaddress description . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 47 Addr 0 TPLL charge pump control (0Bh) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 47 Addr 1 TPLL Counter 1 (LSB). . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 48 Addr 2 TPLL Counter 2 (MSB) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 48 Addr 3 TV(00h) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 48 Addr 4 TV/IF Counter (FM ACh, AM 1Ch) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 49 Addr 5 TPLL Divider (FM 3Dh, AM 2Dh) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 50 Addr 6 AGC (FM 06h, AM 2Ah) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 51 Addr 7 Quality AC (FM 50h) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 52 Addr 8 Quality ACM/MP (FM 6Ah) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 53 Addr 9 Quality Dev (FM 49h) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 54 Addr 10 Quality MUX/FSU (FM 0Eh, AM 0Fh) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 55 Addr 11 Weak Signal Mute (FM A8h) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 55 Addr 12 AM IF NB (AM B1h) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 56 Addr 13 XTAL adjust(80h) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 56 Addr 14 IF2 adjust (FM E8h, AM 08h) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 57 Addr 15 IQ adjust / Switch (FM E7h) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 58 Addr 16 FM keying AGC (FM 1Dh). . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 59 Addr 17 Roll off / Level gain (77h) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 60 Addr 18 SD Stereoblend / AM corner frequency (0Dh) . . . . . . . . . . . . . . . . . . . . . . . . . . . 61 Addr 19 SD High cut (2Fh) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 62 Addr 20 SD MP (FM 97h, AM 3Fh). . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 63 Addr 21 SD Quality (FFM 7Ah, AM FAh) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 64 Addr 22 SD NB I (FM 05h, AM 04h) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 65 Addr 23 SD NB II (FM E2h, AM C2h) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 66 Addr 24, 26, 27, 28, 29 testing (FEh) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 67 Addr 25 Testing (FEh) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 67 Document revision history . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 76 Doc ID 16048 Rev 2 TDA7541B List of figures List of figures Figure 1. Figure 2. Figure 3. Figure 4. Figure 5. Figure 6. Figure 7. Figure 8. Figure 9. Figure 10. Figure 11. Figure 12. Figure 13. Figure 14. Figure 15. Figure 16. Block circuit diagram. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6 Pin connection (top view) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7 Programming of HC filter . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 33 Programming of stereo blend . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 34 Adaptive threshold control of noise blanker . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 35 Stereo blend controlled threshold adjust . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 36 Deviation controlled threshold adjust . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 36 Block diagram FM part . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 68 Block diagram VCO . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 69 Block diagram ISS function. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 70 Block diagram AM path. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 71 Block diagram stereo decoder . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 72 Block diagram audio noise blanker . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 72 Block diagram multi path detection for stereo decoder. . . . . . . . . . . . . . . . . . . . . . . . . . . . 73 Application circuit . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 74 LQFP64 mechanical data and package dimensions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 75 Doc ID 16048 Rev 2 5/77 Block circuit diagram 1 Block circuit diagram Figure 1. 6/77 TDA7541B Block circuit diagram Doc ID 16048 Rev 2 TDA7541B Pin connection and pin description 2 Pin connection and pin description 2.1 Pin connection GNDVCC2 MIX2AMPOUT VCC2 MIX2REF MIX2OUT AMRFAGCTC MIX2INREF MIX2IN AMAGC2TC IF1REF IF1AMPOUT VCCIF1 IF1AMPIN GNDIF MIX1REF Pin connection (top view) MIX1OUT Figure 2. 64 63 62 61 60 59 58 57 56 55 54 53 52 51 50 49 VCCMIX1 1 48 VREF1 DEVTC 2 47 AMIF2IN AMMIX1IN 3 46 GNDDEM AMRFAGCOUT 4 45 FMREFDEMC WB 5 44 AMIF2REF AMMIX1RAF 6 43 MPXOUT AMPINDR 7 42 MUTETC FMMIX1IN1 8 41 MPXIN GNDRF 9 40 AMREFDEMC FMMIX1IN2 10 39 MPTC 38 GNDSTD 12 37 FSWO FMAGCTC 13 36 VCC1 VCOB 14 35 R VCOE 15 34 L VCCVCO 16 33 GNDVCC1 Doc ID 16048 Rev 2 XTALD ISSTC2 ISSTC1 XTALG FSTC FSU SCL SDA SSTOP SW LPHC LPF VREF2 23 24 25 26 27 28 29 30 31 32 LPOUT 17 18 19 20 21 22 MUX 11 GNDVCO TV FMPINDR 7/77 Pin connection and pin description 2.2 Pin description Table 2. Pin description Pin No. 8/77 TDA7541B Pin name Function 1 VCCMIX1 Mixer1 Supply 2 DEVTC Deviation Detector Time Constant 3 AMMIX1IN AM Mixer1 Input 4 AMRFAGCOUT AM RF AGC Voltage Output 5 WB Weather Band Input 6 AMMIX1REF AM Mixer1 Reference 7 AMPINDR AM Pin Diode Driver Output 8 FMMIX1IN1 FM Mixer1 Input1 9 GNDRF RF Ground 10 FMMIX1IN2 FM Mixer1 Input2 11 TV Tuning Voltage Preselection 12 FMPINDR FM Pin Diode Driver Output 13 FMAGCTC FM AGC Time Constant 14 VCOB VCO Input Base 15 VCOE VCO Output Emitter 16 VCCVCO VCO Supply 17 GNDVCO VCO Ground 18 LPOUT OpAmp Output to PLL Loop Filter 19 VREF2 Voltage Reference for PLL OpAmp 20 LPF OpAmp Input to PLL Loop Filter 21 LPHC High Current PLL Loop Filter Input 22 SW Free Programmable Switch Output 23 MUX Multiplexer Output 24 SSTOP Search Stop Output 25 SDA I2C Bus Data 26 SCL I2C Bus Clock 27 FSU Unweighted Field Strength Output 28 FSTC S-meter Filtering Capacitor 29 XTALG Xtal Oscillator to MOS Gate 30 ISSTC1 ISS Filter Time Constant1 (slow) 31 ISSTC2 ISS Filter Time Constant2 (fast) 32 XTALD Xtal Oscillator to MOS Drain 33 GNDVCC1 Digital Ground Doc ID 16048 Rev 2 TDA7541B Pin connection and pin description Table 2. Pin description (continued) Pin No. Pin name Function 34 L Stereo Decoder Output Left 35 R Stereo Decoder Output Right 36 VCC1 Digital Supply 37 FSWO Weighted Field Strength Output 38 GNDSTD Stereo Decoder Ground 39 MPTC Multipath Detector Time Constant 40 AMREFDEMC AM Demodulator Reference 41 MPXIN Stereo Decoder Input 42 MUTETC Weak Signal Mute Time Constant 43 MPXOUT AM Audio / MPX Output 44 AMIF2REF AM IF2 Amplifier Reference Voltage 45 FMREFDEMC FM Demodulator Reference 46 GNDDEM FM Demodulator Ground 47 AMIF2IN AM IF2 Amplifier Input 48 VREF1 5V Reference 49 GNDVCC2 Analog Ground 50 MIX2AMPOUT MIXER2 Amplifier Output 51 VCC2 Analog Supply 52 MIX2REF Mixer2 Reference 53 MIX2OUT Mixer2 Output 54 AMRFAGCTC AM RF AGC Time Constant 55 MIX2INREF Mixer2 Input Reference 56 MIX2IN Mixer2 Input 57 AMAGC2TC AM AGC2 Time Constant 58 IF1REF IF1 Amplifier Reference 59 IF1AMPOUT IF1 Amplifier Output 60 VCCIF1 IF1 Supply 61 IF1AMPIN IF1 Amplifier Input 62 GNDIF1 IF1 Ground 63 MIX1REF Mixer1 Reference 64 MIX1OUT Mixer1 Output Doc ID 16048 Rev 2 9/77 Electrical specifications and characteristics TDA7541B 3 Electrical specifications and characteristics 3.1 Thermal data Table 3. Thermal data Symbol Parameter RTH(j-amb) Thermal resistance junction-to-ambient 3.2 Max. Value Unit 70 °C/W Absolute maximum ratings Table 4. Absolute maximum ratings Symbol VS Parameter Conditions Value Unit Supply voltage - 9.5 V Tamb Ambient temperature - -40 to 85 °C Tstg Storage temperature - -55 to +150 °C 2 kV Machine Model 100 V Charged Device Model 300 V Human Body Model VESD ESD withstand voltage 3.3 Electrical characteristics 3.3.1 Globals Tamb = 25 °C, VCC1 = VCC2 = VCCMIX1 = VCCVCO = VCCIF = 8.5 V, fXtal = 10.25 MHz, in application circuit, unless otherwise specified. Table 5. Item Globals Symbol Parameter Test conditions Min. Typ. Max. Unit 1. Supply 1.1 VCC1 Digital supply voltage - 7.7 8.5 9 V 1.2 VCC2 Analog supply voltage - 7.7 8.5 9 V 1.3 VCCVCO VCO supply voltage - 7.7 8.5 9 V 1.4 VCCMIX1 Mixer1 supply voltage - 7.7 8.5 9 V 1.5 VCCIF IF1 Supply Voltage - 7.7 8.5 9 V 1.6 ICC1 Supply current FM ON - 19 23 mA 1.7 ICC1 Supply current AM ON - 21 25 mA 1.8 ICC2 Supply current FM ON - 48 58 mA 1.9 ICC2 Supply current AM ON - 37 44 mA 10/77 Doc ID 16048 Rev 2 TDA7541B Table 5. Item Electrical specifications and characteristics Globals (continued) Symbol Parameter Test conditions Min. Typ. Max. Unit 1.10 ICCVCO Supply current - - 12 15 mA 1.11 ICCMIX1 Supply current FM ON - 32 40 mA 1.12 ICCMIX1 Supply current AM ON - 20 24 mA 1.13 ICCIF Supply current - - 4 5 mA 2. Reference voltages 2.1 VREF1 Internal reference voltage IREF1 = 0mA 4.8 5 5.2 V 2.2 VREF2 Internal reference voltage IREF2 = 0mA 2.4 2.5 2.6 V 3. I 2C bus interface 3.1 fSCL Clock frequency - - - 400 kHz 3.2 VIL Input low voltage - - - 1 V 3.3 VIH Input high voltage - 2 - - V 3.4 IIN Input current - -5 - 5 µA 3.5 VO Output acknowledge voltage IO = 1.6mA - - 0.4 V 3.3.2 FM section Tamb = 25 °C, VCC1 = VCC2 = VCCMIX1 = VCCVCO = VCCIF = 8.5 V, fXtal = 10.25 MHz, fRF = 98 MHz, dev = 40 kHz, fMod = 1 kHz, in application circuit, unless otherwise specified. Table 6. Item FM section Symbol Parameter Test conditions Min. Typ. Max. Unit 4. Wide band RF AGC 4.1 V8-10 Lower threshold start V13 = 2.5 V, RFK “0” - 79 - dBV 4.2 V8-10 Upper threshold start V13 = 2.5 V, RFK”0” - 93 - dBV 4.3 ∆ V8-10 Control range RF KAGC KAGC”000”, RFAGC”00”, V37 = 3.0….3.7 V, RFK”1” 5 8 11 - 5. Narrow band IF and keying AGC 5.1 V61 Lower threshold start KAGC = off, V8-10 = 0 mVRMS - 82 - dBµV 5.2 V61 Upper threshold start KAGC = off, V8-10 = 0 mVRMS - 94 - dBµV 5.3 V61 Max. IFAGC threshold with KAGC KAGC”000”,IFAGC”00”, V37 = 3.0 V - 97 - dBµV 5.4 V37 Start point KAGC KAGC”000”,IFAGC”00”, 3.2 3.4 3.6 V 5.5 ∆ V61 Control range IF KAGC KAGC”000”,IFAGC”00”, V37 = 3.2….3.9 V 12 15 18 dB - - VREF1 +VBE V 6. AGC time constant output 6.1 V13 Max. AGC output voltage V8-10= 0 mVRMS Doc ID 16048 Rev 2 11/77 Electrical specifications and characteristics Table 6. TDA7541B FM section (continued) Item Symbol Parameter Test conditions Min. Typ. Max. Unit 6.2 V13 Min. AGC output voltage V8-10 = 100 mVRMS - - 0.5 V 6.3 I13 Min. AGC charge current V8-10= 0 mVRMS,V13 = 2.5 V -33 -25 -17.5 µA 6.4 I13 Max. AGC discharge current V8-10 = 100 mVRMS,V13 = 2.5 V 1.7 2.5 3.3 mA 15 25 35 µA 7. AGC PIN diode driver output 7.1 I12 AGC OUT, current min. V8-10 = 0 mVRMS, V12 = 2.5V 7.2 I12 AGC OUT, current max. V8-10 = 50 mVRMS, V12 = 2.5 V - - -16 mA 8. FM I/Q Mixer1 (10.7 MHz) 8.1 RIN Input resistance Differential 8 10 12 kΩ 8.2 CIN Input capacitance Differential - 4 - pF 8.3 ROUT Output resistance - 530 660 790  8.4 V8,11 Input DC bias - 2.2 2.5 2.8 V 8.5 G Gain Unloaded 20 22 24 dB 8.6 Gl Gain With 330  load 14 16 18 dB 8.7 INOISE Equivalent input noise - - 3 - nV/Hz 8.8 CP1dB 1dB compression point Referred to diff. mixer input - 100 - dBµV 8.9 IIP3 3rd order intermodulation - - 119 - dBµV 8.10 IQP I/Q phase adjust PH -7 - +8 DEG 8.11 IRR Image rejection ratio Ratio wanted/image 30 40 - dB 8.12 IRR Image rejection ratio With phase adjust 40 46 - dB 9. WB I/Q Mixer1 (10.7 MHz) 9.1 RIN Input resistance Single ended 1.7 2.5 3.3 kΩ 9.2 CIN Input capacitance Single ended - 3 - kΩ 9.3 ROUT Output resistance - 530 660 790  9.4 V5 Input dc bias - 2 2.3 2.6 V 9.5 G Gain unloaded 24 26 28 dB 9.6 INOISE Equivalent Input noise Source impedance 400  - 2.3 - nV/Hz - - 113 - dBµV 9.7 IIP3 rd 3 order intermodulation 10. IF1 amplifier (10.7 MHz) 10.1 RIN Input resistance - 265 330 396  10.2 CIN Input capacitance - - 2.5 - pF 10.3 V61 DC input voltage - - VCCIF1/3 - V 10.4 ROUT Output resistance - 265 330 396  10.5 COUT Output capacitance - - 2.5 - pF 12/77 Doc ID 16048 Rev 2 TDA7541B Table 6. Electrical specifications and characteristics FM section (continued) Item Symbol Parameter 10.6 V59 DC output voltage 10.7 Gmin 10.8 Gmax 10.9 Test conditions Min. Typ. Max. Unit - - VCCIF1/2 - V Min. gain IFG - 9 - dB Max. gain IFG - 21 - dB INOISE Equivalent input noise voltage Gmax, Rgen=330 RL=330  noise of Rgen not included - 3.2 - nV/Hz 10.10 CP1dB 1 dB compression point referred to 330 input, Gmax - 99 - dBµV 10.11 IIP3 3rd order Intermodulation referred to 330 input, Gmax - 130 - dBµV 240 300 360  11. Mixer2 (450kHz) 11.1 RIN Input resistance Differential 11.2 CIN Input capacitance - - 2.5 - pF 11.3 V55.56 DC input voltage - 3.7 4 4.3 V 11.4 ROUT Output resistance - 100 - - k 11.5 COUT Output capacitance - - 2.5 - pF 11.6 V52,53 DC output voltage - 3.7 4 4.3 V 11.7 gm Conversion transconductance WB Mode; referred to MIX2OUT - 126 - µA/V 11.8 G Gain FM Mode, referred to MIX2OUT - 16 - dB 11.9 Cstep Min. cap. Step IF2A - 2.2 - pF 11.10 Cmax Max. cap. IF2A - 33 - pF 11.11 INOISE Equivalent input noise voltage, including buffer mixer2 Rgen = 330 IF2Q”10” noise of Rgen not included - 15 - nV/Hz 11.12 CP1dB 1dB compression point referred to 330 input,IF2Q”10” - 116 - dBV referred to 330 input,IF2Q”10” - 132 - dBV Total harmonic distortion Dev.= 75 kHz, V56= 100 dBµV, IF2Q”11” - 0.1 0.3 % AM suppression V56 =100 dBµ, f = 40 KHz, fmod =1 kHz, fmod =1 kHz@AM, m =0.3 % 40 60 - dB 11.13 IIP3 rd 3 order Intermodulation 12. Demodulator, audio output 12.1 THD 12.2 aAM 12.3 VMPX MPX output signal Dev.= 75 kHz 440 500 560 mVRMS 12.4 ROUT Output impedance - 20 40 60  12.5 RLOAD Load resistance - 10 - - k Doc ID 16048 Rev 2 13/77 Electrical specifications and characteristics Table 6. Item TDA7541B FM section (continued) Symbol Parameter Test conditions Min. Typ. Max. Unit 70 - - dB 40 - - dB f = 40 kHz, fmod =1 kHz, 12.6 12.7 (S+N)/N (S+N)/N V56 =100 dBµV, Signal plus noise-to-noise De-emphasis = 50 µs, ratio at MPXOUT B = 200 Hz to 15 kHz ISSENA = 0 f = 3.5 kHz, fmod =1 kHz, Signal plus noise-to-noise V56 =100 dBµV, ratio De-emphasis = 75 µs, In weatherband mode setting see Table 10 13. Quality detection Unweighted field strength (FSU) and weighted field strength 13.1 V37 DC output voltage V56 = 20 dBV, FMON=1, FSWO = OFF - 2.5 - V 13.2 V37 DC output voltage V56 = 50 dBV, FMON=1, FSWO = OFF - 3 - V 13.3 V37 DC output voltage V56 = 70 dBV, FMON=1, FSWO = OFF - 3.5 - V 13.4 V37 DC output voltage V56 > 120 dBV, FMON=1, FSWO = OFF - 4.6 - V 13.5 V37 Slope - - 25 - mV/dB 13.6 V37 DC offset - -200 - 0 mV 13.7 ROUT Output impedance FSWO 17 23.5 30 k 13.8 V27 DC output voltage V56 = 20 dBV, FMON=1, SL=”101” - 0.1 0.4 V 13.9 V27 DC output voltage V56 = 50 dBV, FMON=1, SL=”101” - 1 - V 13.10 V27 DC output voltage V56 = 70 dBV, FMON=1, SL=”101” - 2 - V 13.11 V27 DC output voltage V56 > 120 dBV, FMON=1, SL=”101” 4 - - V 13.12 V27 Slope - - 50 - mV/dB 13.13 ROUT Output impedance FSU 320 400 480  13.14 Rload Load resistor FSU - 20 - k 13.15 V27 DC output voltage AM V47 = 20 dBV, FMON = 0, SL= ”010” - 0.1 0.3 V 13.16 V27 DC output voltage AM V47 = 40 dBV, FMON = 0, SL= ”010” - 1.25 - V 13.17 V27 DC output voltage AM V47 = 60 dBV, FMON = 0, SL= ”010” - 3.0 - V 13.18 V27 DC output voltage AM V47 > 100 dBV, FMON = 0, SL= ”010” 4.5 - - V 14/77 Doc ID 16048 Rev 2 TDA7541B Table 6. Electrical specifications and characteristics FM section (continued) Item Symbol 13.19 V27 13.20 fLP Parameter Test conditions Min. Typ. Max. Unit Slope AM FMON=0 - 90 - mV/dB -3 dB frequency low pass AM FMON=0 - 40 - kHz - - 32 - dB -3 dB frequency highpass ACF=0 - 100 - kHz Adjacent channel gain 13.21 GAC Gain Adjacent channel filter 13.22 fHP 13.23 f-20dB Attenuation 20dB - - 70 - kHz 13.24 fBP Centre frequency ACF=1 - 100 - kHz - - 12 - dB Multipath channel gain 13.25 GMP Gain Multipath bandpass filter 13.26 fC Centre frequency - - 19 - kHz 13.27 Q Quality factor - 5 8 10 - 14. ISS (intelligent selectivity system) filter 450kHz 14.1 fcentre Centre frequency fREF_intern = 450kHz 14.2 BW 3dB Bandwidth, -3 dB ISSBW = 1 70 80 90 kHz 14.3 BW 20dB Bandwidth, -20 dB ISSBW = 1 132 150 168 kHz 14.4 BW 3dB ISSBW = 0 106 120 135 kHz 14.5 BW 20dB Bandwidth, -20 dB ISSBW = 0 220 250 280 kHz 14.6 BW 3dB WBON = 1 18 22 26 kHz 14.7 BW 20dB -20dB weather band WBON = 1 - 70 - kHz Bandwidth, -3 dB Bandwidth weather band 450 kHz Adjacent channel ISS filter threshold 14.8 VTHAC Internal low threshold ACTH - 2.75 - V 14.9 VTHAC Internal high threshold ACTH - 3.05 - V Multipath threshold 14.10 VTHMP Internal low threshold MPTH - 0.50 - V 14.11 VTHMP Internal high threshold MPTH - 1.25 - V ISS filter time constant 14.12 I30,31 Charge current low mid TISS, BWDEF = 1 -89 -74 -59 µA 14.13 I30,31 Charge current high mid TISS, BWDEF = 1 -72 -60 -48 µA 14.14 I30,31 Charge current low narrow TISS, BWDEF = 1 -148 -124 -99 µA 14.15 I30,31 Charge current high narrow TISS, BWDEF = 1 -132 -110 -88 µA 14.16 I30,31 Discharge current low TISS, BWDEF = 0 0.5 1 1.5 µA Doc ID 16048 Rev 2 15/77 Electrical specifications and characteristics Table 6. TDA7541B FM section (continued) Item Symbol Parameter Test conditions Min. Typ. Max. Unit 14.17 I30,31 Discharge current high TISS, BWDEF = 0 11 15 19 µA 14.18 V30,31 Low voltage BWDEF = 0 - 0.1 0.2 V 14.19 V30,31 High voltage BWDEF = 1 4.6 4.9 - V ISS filter switch threshold 14.20 V30,31 Threshold ISS on BWDEF = 0 - 3 - V 14.21 V30,31 Threshold ISS off BWDEF = 0 - 1 - V 14.22 V30,31 Threshold ISS narrow on BWDEF = 0 - 4 - V 14.23 V30,31 Threshold ISS narrow off BWDEF = 0 - 2 - V Deviation detection 14.24 I3 Charge current low TDEV -40 -32 -20 µA 14.25 I3 Charge current high TDEV -48 -39 -30 µA 14.26 I3 Discharge current low TDEV 0.5 1 1.5 µA 14.27 I3 Discharge current high TDEV 5.5 8 10.5 µA 14.28 DEVWTH Internal low threshold DWTH, I3 = 1 µA - 20 - kHz 14.29 DEVWTH Internal high threshold DWTH, I3 = 1 µA - 50 - kHz 14.30 RATIOmin Referred to threshold DTH - 1 - 14.31 RATIOmax Referred to threshold DTH - 1.5 - 15. Weak signal mute 15.1 V37 Upper start point WMTH = 0, WMD = 7, VIN=V56, AF = -3 dB - 2.9 - V 15.2 V37 Lower start point WMTH = 7, WMD = 7, VIN=V56, AF = -3 dB - 2.7 - V 15.3 aWMD Min. mute depth WMD = 0, WMTH = 7, V56 =OFF 10 14 - dB 15.4 aWMD Max. mute depth WMD = 7, WMTH = 7, V56=OFF 22 26 - dB 15.5 aMTHISS Mute threshold below WMTH for ISS filter “ON” WMD, WMTH, VIN=V56 - 1 - dB 15.6 VACMTH Internal AC mute threshold ACMTH 40 - 260 mV 15.7 aACMD AC mute depth ACMD 3 - 8 dB 15.8 I42 Charge current - -65 -47.5 -30 A 15.9 I42 Discharge current - 1.5 2.5 4 A 16. Multiplexer output 16.1 V23 Output voltage low - - 0.1 0.2 V 16.2 V23 Output voltage high - 4.6 4.9 - V 16.3 ROUT Output resistance - 200 250 300  16.4 R23load Load resistor - 20 - - k 16/77 Doc ID 16048 Rev 2 TDA7541B 3.3.3 Electrical specifications and characteristics AM section Tamb = 25 °C, VCC1 = VCC2 = VCCMIX1 = VCCVCO = VCCIF = 8.5 V, fXtal = 10.25 MHz, fRF = 1 MHz, m = 30%, fmod = 1 kHz, in application circuit, unless otherwise specified. Table 7. Item AM section Symbol Parameter Test conditions Min. Typ. Max. Unit 17. Global 17.1 VANT_US Usable sensitivity (1) (S+N)/N = 26 dB 17.2 (S+N)/N Signal to Noise Ratio 17.3 aIF IF1 rejection 17.4 V3 Min. RF AGC threshold 17.5 V3 Max. RF AGC threshold 17.6 V61 Min. IF AGC threshold 17.7 V61 Max. IF AGC threshold 17.8 V56 Min. DAGC threshold V56 Max. DAGC threshold 17.9 - 19 25 dBµV Ref.: V3 = 80 dBµV 50 55 - dB S/N = 26 dB, m = 30 %, fmod = 1 kHz 70 80 - dB - 92 - dBµV - 104 - dBµV - 78 - dBµV - 102 - dBµV - 86 - dBµV - 98 - dBµV RFAGC IFAGC DAGC 18. AGC voltage driver output 18.1 V4 Max. AGC output voltage - 3.3 3.5 - V 18.2 V4 Min. AGC output voltage - - - 0.5 V 18.3 | I4 | AGC current V4 = 0 V, V54 = 3.5 V, LNA”00” - 340 - µA - - - -15 mA 19. AGC PIN diode driver output 19.1 I7 AGC driver current 20. AM Mixer1 (10.7 MHz) 20.1 RIN Input resistance differential 45 - - k 20.2 CIN Input capacitance differential - 2.5 - pF 20.3 ROUT Output impedance - 530 660 790  20.4 CP1dB 1dB compression point referred to diff. mixer input - 112 - dBV 20.5 V3,6 Input DC bias - 0.3 0.4 0.55 V 3 order intermodulation - - 132 - dBV Equivalent input noise - - 5.5 - nV/Hz Gain With 330  filter 3 5.5 7 dB 20.6 IIP3 20.7 INOISE 20.8 G rd 21. AM mixer2 21.1 RIN Input resistance - 240 300 360  21.2 CIN Input capacitance - - 2.5 - pF 21.3 V55.56 DC input voltage - 3.8 4 4.2 V 21.4 ROUT Output resistance - 100 - - k Doc ID 16048 Rev 2 17/77 Electrical specifications and characteristics Table 7. TDA7541B AM section (continued) Item Symbol 21.5 COUT Output capacitance - - 2.5 - pF 21.6 V52,53 DC output voltage - 3.7 4.0 4.3 V 21.7 gm Conversion transconductance MIX2OUT - 440 - µA/V 21.8 Gmax Max. gain L = 560 µH, Q = 28; C = 180 pF, referred to MIX2OUT - 26 - dB 21.9 G Gain control range - - 20 - dB 21.10 Cstep Min. cap. Step IF2A - 2.2 - pF 21.11 Cmax Max. cap. IF2A - 33 - pF 21.12 INOISE Equivalent input noise voltage, including buffer mixer2 Amax, Rgen= 330 RL = 2 knoise of Rgen not included - 11 - nV/H z 21.13 CP1dB 1dB compression point Amax, referred to 330 input - 114 - dBV 3rd Amax, referred to 330 input - 132 - dBV 21.14 IIP3 Parameter order Intermodulation Test conditions Min. Typ. Max. Unit 22. Buffer AM mixer2 22.1 ROUT Output resistance - 1.6 2 2.4 k 22.2 COUT Output capacitance - - 2.5 - pF 22.3 V50 DC output voltage - 3.7 4.0 4.3 V 22.4 G gain RL = 2 k -8 -6 -4 dB 23. AM IF2 amplifier 23.1 RIN Input resistance - 1.6 2 2.4 k 23.2 CIN Input capacitance - - 2.5 - pF 23.3 V44,47 DC input voltage - 4.1 4.3 4.5 V 23.4 Gmax Max. gain - 49 52 55 dB 23.5 G Gain control range - 36 38 40 dB 23.6 INOISE Equivalent input noise voltage Gmax, Rgen = 2 k noise of Rgen not included - 9.5 - nV/Hz 23.7 CP1dB 1 dB compression point Gmax, referred to 2 kinput - 74 - dBV 23.8 IIP3 3rd order Intermodulation Gmax, referred to 2 kinput - 100 - dBV 23.9 V23 IF2 output voltage V56 = 90 dBV, m = off 140 190 240 mVRMS - 62 - dBµV 50 55 - dB - 50 - µA/V 24. AMAGC2 24.1 VAGC(start) AGC start voltage (PIN47) Input carrier voltage 24.2 AGC AGC2 range Between start of AGC2 and the intervention point of prestage AGC 24.3 gAGC Control slope Seek mode 18/77 Doc ID 16048 Rev 2 TDA7541B Table 7. Electrical specifications and characteristics AM section (continued) Item Symbol Parameter Test conditions Min. Typ. Max. Unit 24.4 gAGC Control slope normal mode - 5 - µA/V 24.5 II57I Max. AGC charge current Seek mode - 125 - A 24.6 II57I Max. AGC charge current normal mode - 5 - A 24.7 V57 Max. AGC output voltage V47 = 100 dBµ 4.6 4.8 - V 24.8 V57 Min. AGC output voltage V47 = 20 dBµ - 0.2 0.5 V V56 = 90 dBµ, m = 30 %, fmod = 1KHz 170 200 230 mVRM V56 = 90 dBµ, m = 30 %, fmod = 1 kHz - V56 = 90 dBµ, m = 80%, fmod = 1 kHz - 0.5 0.9 - 20 25 30  25. AM audio output 25.1 V43 Audio output voltage 25.2 THD Total harmonic distortion 25.3 25.4 ROUT Output impedance S 0.3 0.5 % 26. IF noise blanking 26.1 tbl Min. blanking time - - 8 - s 26.2 tbl Max. blanking time - - 17 - s 26.3 Vth Min internal threshold - - 50 - mV 26.4 Vth Max. internal threshold - - 187.5 - mV 26.5 Vthstep Threshold step - - 12.5 - mV 1. Can be reached in application circuit, not measured. 3.3.4 Stereo decoder section Tamb = 25 °C, VCC1 = VCC2 = VCCMIX1 = VCCVCO = VCCIF = 8.5 V, fXtal = 10.25 MHz, VMPX = 500 mVrms mono, f = 1 kHz, de-emphasis = 50 µs, in application circuit, unless otherwise specified. Table 8. Item Stereo decoder section Symbol Parameter Test conditions Min. Typ. Max. - - 0.5 0.93 WBON = 1 - 0.05 0.06 Unit 27. Stereo decoder 27.1 Vin MPX input level 27.3 Rin Input resistance - 80 100 120 k 27.4 GSTD Stereo decoder gain - 2 2.5 3 dB 27.5 GSTDWB Stereo decoder gain Weather band mode 23 26 27 dB 27.6 SVRR Supply voltage ripple rejection Vripple = 100 mV, f = 1 kHz - 60 - dB 27.2 Doc ID 16048 Rev 2 Vrms 19/77 Electrical specifications and characteristics Table 8. TDA7541B Stereo decoder section (continued) Item Symbol 27.7 A 27.8 27.9 Parameter Test conditions Min. Typ. Max. Unit 35 40 - dB channel separation VMPX = 500 mVrms stereo, only L/R, ROC adjusted THD Total harmonic distortion - - 0.02 0.3 % (S+N)/N Signal plus noise to noise ratio A-weighted, 19 kHz notch - 85 - dB 28. Mono/stereo switch 28.1 VPTHST1 Pilot threshold voltage for Stereo, PTH = 1 5 8 12 mVrms 28.2 VPTHST0 Pilot threshold voltage for Stereo, PTH = 0 7 11 16 mVrms 28.3 VPTHMO1 Pilot threshold voltage for Mono, PTH = 1 3.5 6 10 mVrms 28.4 VPTHMO0 Pilot threshold voltage for Mono, PTH = 0 6 9 14 mVrms 18.9 - 19.1 kHz 29. 19kHz PLL 29.1 flock Capture range Pilot magnitude 20 mVrms = 4 % 29.2 DP Pilot deviation range fpilot = 19 kHz 4 - 30 % 30. De-emphasis and high cut 30.1 tHC50 De-emphasis time constant DEEMP=0, High Cut OFF 45 50 55 s 30.2 tHC75 De-emphasis time constant DEEMP = 1, High Cut OFF 67 75 83 s 30.3 tHC50 High cut time constant DEEMP = 0, High Cut ON, V28=0.1V 135 150 165 s 30.4 tHC75 High cut time constant DEEMP= 1, High Cut ON, V28 = 0.1 V 200 225 250 s 30.5 AAmmin Min. Attenuation in AM Voutmax/Vout@ f = 3.5 kHz, DEEMP = 0, AMCF “111” - 3.6 - dB 30.6 AAmmax Max. Attenuation in AM Voutmax/Vout@ f = 3.5 kHz, DEEMP= 0, AMCF “000” - 8 - dB 31. Stereo blend and high cut control 31.1 LGmin Min. level gain LG -0.3 0 0.3 dB 31.2 LGmax Max. level gain LG 7.75 8.25 8.75 dB 31.3 LGstep Level gain step Resolution - 0.25 0.55 0.85 dB 31.4 VSBLmin Min. voltage for mono SBC 24 29 34 %VREF1 31.5 VSBLmax Max. voltage for mono SBC 53 58 63 %VREF1 31.6 VSBLstep Step resolution SBC 3.5 4.2 5 %VREF1 31.7 VHCHmin Min. voltage for no high cut HCHT 37 42 47 %VREF1 31.8 VHCHmax Max.voltage for no high cut HCHT 61 66 71 %VREF1 20/77 Doc ID 16048 Rev 2 TDA7541B Table 8. Item Electrical specifications and characteristics Stereo decoder section (continued) Min. Typ. Max. Unit HCHT 7 8 9 %VREF1 31.10 VHCLmin Min. voltage for full high cut HCLT 6 11 16 %VHCH 31.11 VHCLmax Max. voltage for full high cut HCLT 28 33 38 %VHCH 31.12 VHCLstep Step resolution 6.5 7.3 8.1 %VHCH 31.9 Symbol Parameter Test conditions VHCHstep Step resolution HCLT 32. Carrier and harmonic suppression at the output 32.1 a19 Pilot signal f = 19 kHz - 45 50 - dB 32.2 a38 Subcarrier f = 38 kHz - - 75 - dB 32.3 a57 Subcarrier f = 57 kHz - - 62 - dB 32.4 a76 Subcarrier f = 76 kHz - - 90 - dB 33. Intermodulation (1) 33.1 a2 fmod = 10 kHz, fspur =1 kHz - - 65 - dB 33.2 a3 fmod = 13 kHz, fspur =1 kHz - - 75 - dB 34. Traffic radio (2) 34.1 a57 Signal f = 57 kHz - 65 70 - dB Signal f = 67 kHz - - 75 - dB 35. SCA (3) 35.1 a67 36. ACI – adjacent channel interference (4) 36.1 a114 Signal f = 114 kHz - - 95 - dB 36.2 a190 Signal f = 190 kHz - - 84 - dB VPEAK=0.8 V, NBLT “111” - 147 - mVOP VPEAK=0.8 V, NBLT “000” - 280 - mVOP 37. FM noise blanker 37.1 VTRMIN Min. trigger threshold (5) (5) 37.2 VTRMAX Max. trigger threshold 37.3 VTRNOISE Min. noise controlled trigger threshold VPEAK = 1.5 V, NBCT “11” - 450 - mVOP 37.4 VTRNOISE Max. noise controlled trigger threshold VPEAK = 1.5 V, NBCT “00” - 1200 - mVOP 37.5 VPEAK Peak voltage NBRR “00”, VMPX = 0 mV - 0.8 - V 37.6 VPEAK Peak voltage NBRR “00”, VMPX = 50 mV, f = 150 kHz - 1.9 - V 37.7 VPEAK Peak voltage NBRR “00”, VMPX = 200 mV, f = 150 kHz - 3.5 - V 37.8 VPEAKDEV Min. deviation dependent peak voltage VMPX = 500 mV, NBDC = 11 (“OFF”) - 0.8 - V 37.9 VPEAKDEV Max. deviation dependent VMPX = 500 mV, NBDC= 00 peak voltage - 2.0 - V Doc ID 16048 Rev 2 21/77 Electrical specifications and characteristics Table 8. TDA7541B Stereo decoder section (continued) Item Symbol Parameter 37.10 VPEAKFS Min. fieldstrength controlled peak voltage 37.11 VPEAKFS 37.12 Test conditions Min. Typ. Max. Unit VMPX=0mV, VLEVEL (FM: 0.6 V / AM: 1.2 V) - - - - SSTOP = H if IFC = H & FS > Addr 11 Weak Signal Mute (FM A8h) MSB LSB Function d7 d6 d5 d4 d3 d2 d1 d0 - - - - - - - 0 ISS filter internal control 1 ISS filter forced “ON” ISSON WBON - - - - - - 0 - 1 Weather band disable Weather band enable WMTH - - - 0 0 0 Startpoint mute 0 0 0 1 0 1 0 1 1 0 Startpoint mute 6 1 1 1 Startpoint mute 7 Startpoint mute 1 - - Startpoint mute 2 WMD 0 0 0 Mute depth 0 0 0 1 1 0 1 Mute depth 5 1 1 1 Mute depth 7 - - - - - Mute depth 1 Doc ID 16048 Rev 2 55/77 Software specification Table 29. TDA7541B Addr 12 AM IF NB (AM B1h) MSB LSB Function d7 d6 - - - - 0 1 d5 d4 d3 d2 d1 d0 - - - - - - - 0 0 0 0 1 1 0 0 1 1 0 1 0 1 0 0 0 1 0 0 0 1 0 1 - 0 0 1 1 0 1 0 1 - - - - - - - - - - - - Table 30. 0 1 AINENA AM IF noise blanker disable AM IF noise blanker enable AINTH not recommended not recommended AM IF NB Threshold 50 mV AM IF NB Threshold 62.5 mV AM IF NB Threshold 100 mV AM IF NB Threshold 187.5 mV AINT AM IF NB Time 8 µs AM IF NB Time 11 µs AM IF NB Time 14 µs AM IF NB Time 17 µs IFAGCS Enable AM IFAGC threshold shift down (check address6) Disable AM IFAGC threshold shift down Addr 13 XTAL adjust(80h) MSB LSB Function d7 d6 d5 d4 d3 d2 d1 d0 XTAL - - - 0 0 0 0 0 CLoad 0pF 0 0 0 0 1 CLoad 0.75 pF 0 0 0 1 0 CLoad 1.5 pF 0 0 0 1 1 CLoad 2.25 pF 0 0 1 0 0 CLoad 3 pF 1 1 1 1 0 CLoad 22.5 pF 1 1 1 1 1 CLoad 23.25 pF SL 0 0 0 S meter slope FM = 0.75 V/20 dB, AM = 1.61 V/20 dB 0 0 1 S meter slope FM = 0.80 V/20 dB, AM = 1.75 V/20 dB 0 1 0 0 1 1 1 0 0 S meter slope FM = 0.85 V/20 dB, AM = 1.89 V/20 dB - - - - - S meter slope FM = 0.90 V/20 dB, AM = 1.98 V/20 dB S meter slope FM = 0.95 V/20 dB, AM = 2.04 V/20 dB 1 0 1 S meter slope FM = 1.0 V/20 dB, AM = 2.1 V/20 dB 1 1 0 S meter slope FM = 1.05 V/20 dB, AM = 2.15 V/20 dB 1 1 1 S meter slope FM = 1.1 V/20 dB, AM = 2.20 V/20 dB 56/77 Doc ID 16048 Rev 2 TDA7541B Table 31. Software specification Addr 14 IF2 adjust (FM E8h, AM 08h) MSB LSB Function d7 d6 d5 d4 d3 d2 d1 d0 IF2A - - - - 0 0 0 0 Cadj 0 pF 0 0 0 1 Cadj 2,2 pF 0 0 1 0 Cadj 4,4 pF 0 0 1 1 Cadj 6,6 pF 0 1 0 0 Cadj 8,8 pF 1 0 0 0 Cadj 17,6 pF 1 1 1 1 Cadj 33 pF IF2Q - - 0 0 no Rint, AM Q=28/gain=26 dB, FM Q=28/gain=16 dB 0 1 1 0 Rint =4,1 kOhm, FM Q=2,5/gain=14 dB, BW=180 kHz 1 1 Rint =3,3 kOhm, FM Q=2,05/gain=14 dB, BW=220 kHz - - - - Rint =5 kOhm, FM Q=3/gain=14 dB, BW=150 kHz IF1G 0 0 IF1 gain 9 dB (AM) 0 1 1 0 IF1 gain 17 dB 1 1 IF1 gain 21 dB (FM) - - - - - - IF1 gain 12 dB Doc ID 16048 Rev 2 57/77 Software specification Table 32. TDA7541B Addr 15 IQ adjust / Switch (FM E7h) MSB LSB Function d7 d6 d5 d4 d3 d2 d1 d0 PH - - - - 0 0 0 0 -7 degree 0 0 0 1 -6 degree 0 0 1 0 -5 degree 0 1 1 1 0 degree 1 0 0 0 1 degree 1 0 0 1 2 degree 1 1 1 0 7 degree 1 1 1 1 8 degree SW - - - 0 - - - - 1 S1 LOW output voltage S1 HIGH output voltage SWM - - 0 - - - - - 1 S1 emitter output available S1 open collector output available DSB 0 0 0 1 1 0 Threshold for FM demodulator spike cancellation 400 mV 1 1 Threshold for FM demodulator spike cancellation 520 mV 58/77 FM demodulator spike cancellation ”OFF” - - - - - - Threshold for FM demodulator spike cancellation 630 mV Doc ID 16048 Rev 2 TDA7541B Table 33. Software specification Addr 16 FM keying AGC (FM 1Dh) MSB LSB Function d7 d6 d5 d4 d3 d2 d1 d0 ODENA - - - - - - - 0 Over deviation correction disable 1 Over deviation correction enable ODCUR - - - - - - 0 - 1 over deviation correction current max=45 µA over deviation correction current max=90 µA KAGC - - - 0 0 0 KAGC threshold 3,60* V48 /5 0 0 1 KAGC threshold 3,65* V48 /5 0 1 0 KAGC threshold 3,70* V48 /5 0 1 1 1 0 0 KAGC threshold 3,80* V48 /5 1 0 1 KAGC threshold 3,85* V48 /5 1 1 0 KAGC threshold 3,90* V48 /5 1 1 1 Keying AGC “OFF” - - KAGC threshold 3,75* V48 /5 RFK - - 0 - - - - - 1 RF keying AGC OFF RF keying AGC ON FSWO 0 0 FSW offset OFF 0 1 1 0 FSW offset = -150 mV 1 1 FSW offset = -192 mV - - - - - - FSW offset = -75 mV Doc ID 16048 Rev 2 59/77 Software specification Table 34. TDA7541B Addr 17 Roll off / Level gain (77h) MSB LSB Function d7 d6 d5 d4 d3 d2 d1 d0 ROC - - - - 0 0 0 0 Roll-Off compensation 25.8 % 0 0 0 1 Roll-Off compensation 24.0 % 0 0 1 0 Roll-Off compensation 22.2 % 0 0 1 1 Roll-Off compensation 20.5 % 0 1 0 0 Roll-Off compensation 18.8 % 0 1 0 1 Roll-Off compensation 17.1 % 0 1 1 0 Roll-Off compensation 15.4 % 0 1 1 1 Roll-Off compensation 13.8 % 1 0 0 0 Roll-Off compensation 12.2 % 1 0 0 1 Roll-Off compensation 10.6 % 1 0 1 0 Roll-Off compensation 9.0 % 1 0 1 1 Roll-Off compensation 7.5 % 1 1 0 0 Roll-Off compensation 6.0 % 1 1 0 1 Roll-Off compensation 4.5 % 1 1 1 0 Roll-Off compensation 3,0 % 1 1 1 1 Roll-Off compensation 1.6 % LG 0 0 0 0 Level gain 0 dB 0 0 0 1 Level gain 0.55 dB 0 0 1 0 0 1 1 1 Level gain 3.85 dB 1 1 1 1 Level gain 8.25 dB 60/77 - - - - Level gain 1.10 dB Doc ID 16048 Rev 2 TDA7541B Table 35. Software specification Addr 18 SD Stereoblend / AM corner frequency (0Dh) MSB LSB Function d7 d6 d5 d4 d3 d2 d1 d0 SBC - - - - - 0 0 0 Stereoblend control at 29 % REF5V 0 0 1 Stereoblend control at 33 % REF5V 0 1 0 Stereoblend control at 38 % REF5V 0 1 1 Stereoblend control at 42 % REF5V 1 0 0 Stereoblend control at 46 % REF5V 1 0 1 Stereoblend control at 50 % REF5V 1 1 0 Stereoblend control at 54 % REF5V 1 1 1 Stereoblend control at 58 % REF5V PTH - - - - 0 - - - 1 Pilot threshold high Pilot threshold low ASI - - - 0 - - - - 1 Audio inverter “OFF” Audio inverter “ON” AMCF 0 0 0 AM attenuation @ 3.5 kHz = 8.4 dB 0 0 1 AM attenuation @ 3.5 kHz = 8.0 dB 0 1 0 1 1 0 AM attenuation @ 3.5 kHz = 4.4 dB 1 1 1 AM attenuation @ 3.5 kHz = 3.6 dB - - - - - AM attenuation @ 3.5 kHz = 7.3 dB Doc ID 16048 Rev 2 61/77 Software specification Table 36. TDA7541B Addr 19 SD High cut (2Fh) MSB LSB Function d7 d6 d5 d4 d3 d2 d1 d0 HCENA - - - - - - - 0 High cut “OFF” 1 High cut “ON” HCMAX - - - - - 0 0 Maximum high cut 10 dB 0 1 1 0 Maximum high cut 7.5 dB 1 1 Maximum high cut 8.5 dB - Maximum high cut 5.5 dB HCHT - - - 0 0 Start level high cut @ 42 % REF5V 0 1 1 0 Start level high cut @ 58 % REF5V 1 1 Start level high cut @ 66 % REF5V - - - Start level high cut @ 50 % REF5V HCLT - 0 0 Stop level high cut @ 11 % VHCHT 0 1 1 0 Stop level high cut @ 25.7 % VHCHT 1 1 Stop level high cut @ 33 % VHCHT - - - - - Stop level high cut @ 18.3 % VHCHT DEEMP 0 1 62/77 - - - - - - - De-emphasis 50 µs De-emphasis 75 µs Doc ID 16048 Rev 2 TDA7541B Table 37. Software specification Addr 20 SD MP (FM 97h, AM 3Fh) MSB LSB Function d7 d6 d5 d4 d3 d2 d1 d0 MPG - - - - - - 0 0 Multipath detector gain =6 dB 0 1 Multipath detector gain =12 dB 1 0 Multipath detector gain =9 dB 1 1 Multipath detector gain =10.5 dB MPRG - - - - 0 0 Multipath detector rectifier gain =7,6 dB 0 1 1 0 Multipath detector rectifier gain =0d B 1 1 Multipath detector rectifier gain disabled - - Multipath detector rectifier gain =4,6 dB MPCC - - - 0 - - - - 1 Multipath detector charge current =0,8 µA Multipath detector charge current =0,4 µA MPINT - - 0 - - - - - 1 Multipath detector internal influence “ON” Multipath detector internal influence “OFF” MPFAST 0 - - - - - - 1 External time constant (MPTC) enable External time constant (MPTC) disable MS 0 1 - - - - - - - Forced MONO MONO/STEREO switch automatically Doc ID 16048 Rev 2 63/77 Software specification Table 38. TDA7541B Addr 21 SD Quality (FFM 7Ah, AM FAh) MSB LSB Function d7 d6 d5 d4 d3 d2 d1 d0 QDC - - - - - - 0 0 Quality detector coefficient a=0,6 0 1 Quality detector coefficient a=0,75 1 0 Quality detector coefficient a=0,9 1 1 Quality detector coefficient a=1,05 QNG - - - - 0 0 Quality noise gain =6 dB 0 1 1 0 Quality noise gain =12 dB 1 1 Quality noise gain =15 dB - - Quality noise gain =9 dB NBDC - - 0 0 Noise blanker deviation adjust 2.0 V 0 1 1 0 Noise blanker deviation adjust 1.0 V 1 1 Noise blanker deviation adjust “OFF” - - - - Noise blanker deviation adjust 1.5 V NBFC 0 0 0 1 1 0 Noise blanker field strength adjust 1.4 V 1 1 Noise blanker field strength adjust “OFF” 64/77 Noise blanker field strength adjust 2.0 V - - - - - - Noise blanker field strength adjust 1.6 V Doc ID 16048 Rev 2 TDA7541B Table 39. Software specification Addr 22 SD NB I (FM 05h, AM 04h) MSB LSB Function d7 d6 d5 d4 d3 d2 d1 d0 NBENA - - - - - - - 0 Audio noise blanker “OFF” 1 Audio noise blanker “ON” NBT - - - - - 0 0 Audio noise blanking time 38 µs 0 1 1 0 Audio noise blanking time 32 µs 1 1 Audio noise blanking time 22 µs - Audio noise blanking time 25,5 µs NBLT - - 0 0 0 Noise blanker low threshold 280 mV 0 0 1 Noise blanker low threshold 261 mV 0 1 0 Noise blanker low threshold 242 mV 0 1 1 1 0 0 Noise blanker low threshold 204 mV 1 0 1 Noise blanker low threshold 185 mV 1 1 0 Noise blanker low threshold 166 mV 1 1 1 Noise blanker low threshold 147 mV - - - Noise blanker low threshold 223 mV NBCT 0 0 Noise blanker noise controlled threshold 1200 mV 0 1 1 0 Noise blanker noise controlled threshold 700 mV 1 1 Noise blanker noise controlled threshold 450 mV - - - - - - Noise blanker noise controlled threshold 950 mV Doc ID 16048 Rev 2 65/77 Software specification Table 40. TDA7541B Addr 23 SD NB II (FM E2h, AM C2h) MSB LSB Function d7 d6 d5 d4 d3 d2 d1 d0 NBPC - - - - - - - 0 Noise blanker peak charge current low 1 Noise blanker peak charge current high NBRR - - - - - 0 0 Noise rectifier discharge resistor = infinite 0 1 1 0 Noise rectifier discharge resistor =33 k 1 1 Noise rectifier discharge resistor =18k - Noise rectifier discharge resistor =56 k NBMP - - - - 0 - - - 1 Multipath influence on peak discharge “OFF” Multipath influence on peak discharge “ON” (-3 V/ms) NBSMP - - - 0 - - - - 1 Strong multipath influence on peak discharge “OFF” Strong multipath influence on peak discharge “ON” VCON - - 0 - - - - - 1 Stereo decoder VCO “OFF” Stereo decoder VCO “ON” PCM - 0 - - - - - - 1 Pilot cancellation mode: always Pilot cancellation mode: if pilot > pilot threshold ADSEL 0 1 66/77 - - - - - - - Additional selectivity OFF Additional selectivity ON Doc ID 16048 Rev 2 TDA7541B Table 41. Software specification Addr 24, 26, 27, 28, 29 testing (FEh) MSB LSB Function d7 d6 d5 d4 d3 d2 d1 d0 1 1 1 1 1 1 1 0 Table 42. Only for testing Addr 25 Testing (FEh) MSB LSB Function d7 d6 d5 d4 d3 d2 d1 d0 - - 1 1 1 1 1 0 Only for testing IFSEXP - 0 - - - - - - 1 Enable expand mode of IF sampling time (see addr 4) Disable expand mode of IF sampling time EWEXP 0 1 - - - - - - - Enable expand mode of error window (see addr 4) Disable expand mode of error window Doc ID 16048 Rev 2 67/77 Appendix 6 TDA7541B Appendix Figure 8. 68/77 Block diagram FM part Doc ID 16048 Rev 2 TDA7541B Appendix Figure 9. Block diagram VCO Doc ID 16048 Rev 2 69/77 Appendix TDA7541B Figure 10. Block diagram ISS function 70/77 Doc ID 16048 Rev 2 TDA7541B Appendix Figure 11. Block diagram AM path Doc ID 16048 Rev 2 71/77 Appendix TDA7541B Figure 12. Block diagram stereo decoder MPXOUT MPXIN L R MUX MPTC FSTC Figure 13. Block diagram audio noise blanker MPXIN Stereo decoder L/R NBENA Monoflop FM:22-40µs AM:0.3-1.2ms NBT S&H VTH Deviation detector 140kHz HPF (2nd. order) Rectifier Integrator discharge control NBPC NBMP NBSMP NBRR MPTC 72/77 Threshold generator NBCT NBDC FMDEMOut PEAK RECT FMON FMON Doc ID 16048 Rev 2 NBLT Fieldstrenght adjust NBFC FSTC TDA7541B Appendix Figure 14. Block diagram multi path detection for stereo decoder Stereo blend FSTC Attack/Decay MUX MPINT Rectifier MPCC FS Bandpass 19kHz internal MPFAST/ SEEK Rectifier MPG MPRG MPTC Doc ID 16048 Rev 2 73/77 AC00706 22n 8.5V 10 330n 100n 16 15 14 1µ 13 12 11 10 9 8 7 6 5 4 3 2 1 10 8.5V 100n 330p VCCVCO VCOE VCOB FMAGCTC FMPINDR TV FMMIX1IN2 GNDRF FMMIX1IN1 AMPINDR AMMI X1REF WB AMRFAGCOUT AMMI X1IN DEVTC VCCMIX1 220n 64 MIX1OUT GNDVCO 17 680 nH 62 MIX1REF LPOUT 18 61 IF1AMPIN 63 GNDIF 19 LPF 20 VREF2 1µ 4.7 60 100n 59 1µ 100n 2.2µ 100n 100n 1 X1 450kHz CF3 51 52 180p AMI F2IN 49 GNDVCC1 L R VCC1 FSWO GNDSTD MPTC AMREFDEMC MPXI N MUTETC MPXOUT AM IF2REF FMREFDEMC GNDDEM 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 22µ 4.7 8.5V VREF1 100n Q_Loaded 28 L=560nH TDA7541B 22 SW FM_AM 8.5V 23 MUX MUX 8.5V 25 SSTOP 24 SSTOP VCCIF1 0.7MHz CF2 26 SDA SDA SCL SCL FSU 27 FSU LPHC 21 IF1AMPOUT 58 IF1REF 57 AMA GC2TC 56 MIX2IN 55 MI X2INREF 54 AMRFAGCTC 53 MIX2OUT 28 FSTC 100n MIX2REF XTALG 29 VCC2 30 50 MIX2AMPOUT 31 GNDVCC2 32 ISSTC2 3.3n ISSTC1 330n Doc ID 16048 Rev 2 XTALD 74/77 1µ 100n 470n 100n 470n 2.2µ 470n L 100n 470n 22 AM _AF/MPX 8.5V 7 R 10.7MHz CF1 Application circuit TDA7541B Application circuit Figure 15. Application circuit 100p TDA7541B 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. ECOPACK® is an ST trademark. Figure 16. LQFP64 mechanical data and package dimensions mm inch DIM. MIN. TYP. MAX. A MIN. TYP. 1.60 0.063 A1 0.05 0.15 0.002 A2 1.35 1.40 1.45 0.053 0.006 0.22 0.27 0.0066 0.0086 0.0106 0.20 0.0035 0.055 0.057 B 0.17 C 0.09 D 11.80 12.00 12.20 0.464 0.472 0.480 D1 9.80 10.00 10.20 0.386 0.394 0.401 0.0079 D3 7.50 0.295 e 0.50 0.0197 E 11.80 12.00 12.20 0.464 0.472 0.480 E1 9.80 10.00 10.20 0.386 0.394 0.401 0.45 0.60 0.75 0.0177 0.0236 0.0295 E3 7.50 L OUTLINE AND MECHANICAL DATA MAX. 0.295 L1 1.00 0.0393 K 0˚ (min.), 3.5˚ (min.), 7˚(max.) ccc 0.080 LQFP64 (10 x 10 x 1.4mm) 0.0031 D D1 A D3 A2 A1 48 33 49 32 0.08mm ccc B Seating Plane E E1 E3 B 17 64 1 16 C e L L1 8 Package information K TQFP64 0051434 F Doc ID 16048 Rev 2 75/77 Revision history 9 TDA7541B Revision history Table 43. 76/77 Document revision history Date Revision Changes 22-Jul-2009 1 Initial release. 17-Sep-2013 2 Updated Disclaimer Doc ID 16048 Rev 2 TDA7541B Please Read Carefully: Information in this document is provided solely in connection with ST products. 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