TDA7540NTR STMicroelectronics, TDA7540NTR Datasheet
TDA7540NTR
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TDA7540NTR Summary of contents
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... Dedicated RDS-mute ■ Internal noise blanker with several threshold controls Table 1. Device summary Order code TDA7540N TDA7540NTR November 2007 intelligent selectivity system (ISS) Additional features ■ VCO for world tuning range ■ 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 diagram . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . ...
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TDA7540N 5 Software specification . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . ...
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List of tables List of tables Table 1. Device summary . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . ...
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TDA7540N Table 49. Addr 37 test tuner control ...
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List of figures List of figures Figure 1. Block circuit diagram ...
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TDA7540N 1 Block diagram Figure 1. Block circuit diagram Block diagram 7/76 ...
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Pins description and connection diagrams 2 Pins description and connection diagrams 2.1 LQFP80 pins connection diagram Figure 2. LQFP80 pins connection (top view) MIX1 OUT1 DEVTC AMMIX1IN AMMIX1REF AMRFAGCOUT AMPINDR FMPINDR FMMIX1IN1 GNDRF FMMIX1IN2 ISSSTATUS FMAGCTC VCCVCO 2.2 Pin description ...
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TDA7540N Table 2. Pin description (continued) Pin # Pin name 10 GNDRF 11 FMMIX1IN2 ISSSTATUS 15 16 FMAGCTC 17 18 VCOB 19 VCOE 20 VCCVCO 21 GNDVCO 22 23 ADJCH 24 AMST/MP 25 STEREO 26 XTALG 27 ...
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Pins description and connection diagrams Table 2. Pin description (continued) Pin # Pin name 47 GNDSTEREO 48 MPTC 49 MUTETC 50 MPXIN 51 VCCSTEREO 52 53 MPX/AFAM 54 AMIF2BPF 55 AMIF2REF 56 FMREFDEMC 57 GNDDEM 58 MPXW 59 AMIF2IN 60 ...
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TDA7540N 3 Electrical specifications 3.1 Absolute maximum ratings Table 3. Absolute maximum ratings Symbol V Supply voltage S T Ambient temperature amb T Storage temperature stg 3.2 Thermal data Table 4. Thermal data Symbol R Thermal resistance junction to ambient ...
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Electrical specifications Table 5. Globals electrical characteristics (continued 25°C, V amb CC1 f = 10.25MHz, in application circuit, unless otherwise specified). Xtal Symbol Parameter I Supply current CC3 I Supply current CCVCO I Supply current CCMIX1 I Supply ...
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TDA7540N Table 6. FM section electrical characteristics (continued 25°C, V amb CC1 f = 98MHz, dev= 40kHz otherwise specified). Symbol Parameter V Startpoint KAGC 22 Δ Control range KAGC R Input resistance IN C Input capacitance ...
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Electrical specifications Table 6. FM section electrical characteristics (continued 25°C, V amb CC1 f = 98MHz, dev= 40kHz otherwise specified). Symbol Parameter R Input resistance IN R Output resistance OUT CP 1dB compression point 1dB IIP3 ...
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TDA7540N Table 6. FM section electrical characteristics (continued 25°C, V amb CC1 f = 98MHz, dev= 40kHz otherwise specified). Symbol Parameter G Gain minimum min G Gain maximum max f -3dB frequency highpass HP f Centre ...
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Electrical specifications Table 6. FM section electrical characteristics (continued 25°C, V amb CC1 f = 98MHz, dev= 40kHz otherwise specified). Symbol Parameter V Internal low threshold NTH V Internal high threshold NTH V Internal low threshold ...
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TDA7540N Table 6. FM section electrical characteristics (continued 25°C, V amb CC1 f = 98MHz, dev= 40kHz otherwise specified). Symbol Parameter Softmute V Upper startpoint ANT V lower startpoint ANT a Min. softmute depth SMmin a ...
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Electrical specifications Table 7. AM section electrical characteristics (continued 25°C, V amb CC1 f = 98MHz otherwise specified). Symbol Parameter V IF output level 24 Min. RF AGC threshold V 4 Max. RF AGC ...
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TDA7540N Table 7. AM section electrical characteristics (continued 25°C, V amb CC1 f = 98MHz otherwise specified). Symbol Parameter A Max. gain ΔA Gain control range C Min. cap step min C Max. cap ...
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Electrical specifications Table 8. Stereodecoder electrical characteristics (continued 25°C, V amb CC1 V = 500mV MPX rms circuit, unless otherwise specified). Symbol Parameter V Pull up voltage for AFS pin puafs R Pull up resistor for AFS pin ...
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TDA7540N Table 8. Stereodecoder electrical characteristics (continued 25°C, V amb CC1 V = 500mV MPX rms circuit, unless otherwise specified). Symbol Parameter VSBL Min. voltage for mono min VSBL Max. voltage for mono max VSBL Step resolution step ...
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Electrical specifications Table 8. Stereodecoder electrical characteristics (continued 25°C, V amb CC1 V = 500mV MPX rms circuit, unless otherwise specified). Symbol Parameter V Peak voltage PEAK V Peak voltage PEAK V Peak voltage PEAK Min. deviation dependent ...
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TDA7540N Table 8. Stereodecoder electrical characteristics (continued 25°C, V amb CC1 V = 500mV MPX rms circuit, unless otherwise specified). Symbol Parameter G AM delay filter attenuation AMdelay Multipath detector Center frequency of multipath- f CMP bandpass G ...
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Electrical specifications Figure 3. Trigger threshold vs. V 280 mV 8 STEPS 147 mV Figure 4. Deviation controlled trigger adjustment Figure 5. Field strength controlled trigger adjustment V PEAK 24/76 PEAK VTH Min. Trig. T hreshold 0 PEAK ...
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TDA7540N 3.3.5 PLL Section Table 9. PLL electrical characteristics (T = 25°C, V amb CC1 f = 98MHz, dev. = 40kHz otherwise specified). Symbol Parameter Output of tuning voltages (TV1,TV2) V Output voltage OUT R Output impedance OUT ...
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Electrical specifications Table 9. PLL electrical characteristics (continued 25°C, V amb CC1 f = 98MHz, dev. = 40kHz otherwise specified). Symbol Parameter V Output voltage high -I Output leakage current I Output current, sink Switching outputs ...
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TDA7540N 4 Functional description 4.1 FM section 4.1.1 Mixer1, AGC and 1.IF FM quadrature I/Q-mixer converts IF1 of 10.7MHz. The mixer provides inherent image rejection and wide dynamic range with low noise and large input signal performance. ...
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Functional description is made by charge and discharge current after comparator1 in an external capacitance. The charge current is fixed and the discharge current is controlled by I produces digital signals (ac, ac additional comparator4. The adjacent channel ...
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TDA7540N 4.2 AM section The up/down conversion is combined with gain control circuit sensing three input signals, narrow band information at PIN 54, upconversion signal (IF2AGC) at PIN 71and wide band information (RFAGC) at PIN 4.This gain control gives two ...
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Functional description Demodulator In the demodulator block the left and the right channel are separated from the MPX-signal. In this stage also the 19-kHz pilot tone is canceled. For reaching a high channel separation the TDA7540 offers an I2C-bus programmable ...
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TDA7540N Stereoblend control The stereoblend control block converts the internal LEVEL-voltage into a demodulator compatible analog signal, which is used to control the channel separation between 0dB and the maximum separation. Internally this control range has a fixed upper limit, ...
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Functional description 4.3.2 Functional description of the noise blanker In the automotive environment spikes produced by the ignition or for example the wiper- motor disturb the MPX-signal. The aim of the noise blanker part is to cancel the audible influence ...
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TDA7540N used to increase the PEAK voltage. Offset and gain of this circuit are programmable in 3 steps (NBDTH) of the stereo decoder-byte (the first step turns off the detector). Multipath-level To react on high repetitive spikes caused by a ...
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Functional description The noise-signal is the PEAK-signal without additional influences (see noise blanker description). The factor 'a' can be programmed from 0.6 to 1.05(QDC) and the factor b can be programmed from 6dB to 15dB ( QNG). The output is ...
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TDA7540N Frequency generation for phase comparison The RF signals applies a two modulus counter (32/33) pre-scaler, which is controlled bit A-divider. The 5-bit register (PC0 to PC4) controls this divider. In parallel the output of the prescaler ...
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Functional description Sampling timer A sampling timer generates the gate signal for the main counter. The basically sampling time are in FM mode 6.25kHz (t followed by an asynchronous divider to generate several sampling times. Intermediate frequency main counter This ...
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TDA7540N 2 4.5 I C-Bus interface The TDA7540N supports the I data onto the bus as a transmitter, and the receiving device as the receiver. The device that controls the transfer is a master and device being controlled is the ...
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Functional description The last bit of the start instruction defines the type of operation to be performed: – When set to "1", a read operation is selected – When set to "0", a write operation is selected The TDA7540N connected ...
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TDA7540N 5 Software specification The interface protocol comprises: - start condition (S) - chip address byte - subaddress byte - sequence of data (N bytes + Acknowledge) - stop condition (P) The pagermode is only working up to byte 31. ...
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Software specification Table 10. Address organization (continued) Function Addr 7 FMAGC 15 RFKAGC AMAGC 16 DAGC3 DEM ADJ 17 DNB1 LEVEL 18 ODSW IF1/XTAL 19 XTAL4 TANK ADJ 20 IF1T3 I/Q ADJ 21 SMO1 AMIFNB 22 AINT1 SCTRL 23 SSTH3 ...
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TDA7540N Table 11. Control register function (continued) Register Name ACNTH ACWTH AFSM AFSON AINBD AINBT AINT AMAF AMD AMCF AMIN AMNBD AMON AMSEEK AMST APPM B BWCTL CASF CF CLKSEP CTLOFF CURRH DAGC DEEMP DEM DESFT DEVM DNB DTH DWTH ...
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Software specification Table 11. Control register function (continued) Register Name IF1T IF2T IFAGC IFCM IFENA IFG IFS ISSIN ISSON ISS30 ISS80 KAGC LDENA LG LM LPF MAXHC MENA MPAC MPCC MPBPG MPF MPG MPION MPOFF MPPC MPRG MPTH MS MUXST ...
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TDA7540N Table 11. Control register function (continued) Register Name NBON NBPC NBRR NBSMP NBT ODCUR ODSW OUT PC PCM PDH PH PTH QDC QNG RC RFAGC RFKAGC ROC S SBA SBC SBSH SBT SBTO SBW SI SL SMODE SMCTH SMD ...
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Software specification Table 11. Control register function (continued) Register Name STDON STDM STING STVCO TDEV TEST TFCKL TIN TINAC TINACM TINMP TISS TMSA TOUT TST TVMODE TVO TVWB VCOD VCOM VCOON VHCH VHCL WAGC XTAL XTLIM 44/76 Stereodecoder on/off if ...
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TDA7540N Table 12. Subaddress MSB 5.2.1 Data byte specification Table 13. Addr 0 Charge Pump Control MSB d7 d6 ...
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Software specification Table 14. Addr 1 PLL counter 1 (LSB) MSB ...
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TDA7540N Table 17. Addr 5 IF counter control 1 MSB Table 18. Addr 6 IF counter control 2 MSB d7 d6 ...
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Software specification Table 18. Addr 6 IF counter control 2 (continued) MSB Table 19. Addr 7 AM ...
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TDA7540N Table 20. Addr 8 quality ISS filter (continued) MSB Table 21. Addr 9 quality ...
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Software specification Table 22. Addr 10 quality detection multipath MSB Table 23. Addr 11 quality deviation detection MSB ...
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TDA7540N Table 23. Addr 11 quality deviation detection MSB Table 24. Addr 12 softmute control 1 MSB ...
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Software specification Table 25. Addr 13 softmute control 2 MSB Table 26. Addr 14 VCODIV/PLLREF MSB ...
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TDA7540N Table 27. Addr 15 FM AGC MSB Table ...
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Software specification Table 28. Addr 16 AM AGC (continued) MSB ...
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TDA7540N Table 30. Addr 18 S-meter slider MSB Addr 20 Tank Adjust Table 31. Addr 19 IF GAIN/XTAL adjust MSB d7 d6 ...
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Software specification Table 32. Tank adjust MSB ...
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TDA7540N Table 34. Addr noise blanker MSB Table 35. Addr 23 ...
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Software specification Table 36. Addr 24 stereodecoder 1 MSB Table 37. Addr 25 stereodecoder 2 MSB ...
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TDA7540N Table 38. Addr 26 stereodecoder 3 MSB Table 39. Addr 27 stereodecoder 4 MSB d7 d6 ...
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Software specification Table 39. Addr 27 stereodecoder 4 (continued) MSB Table 40. Addr 28 stereodecoder 5 MSB ...
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TDA7540N Table 41. Addr 29 stereodecoder 6 (continued) MSB Table 42. Addr 30 stereodecoder 7 MSB ...
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Software specification Table 42. Addr 30 stereodecoder 7 (continued) MSB Table 43. Addr 31 stereodecoder 8 MSB ...
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TDA7540N Table 45. Addr 33 test tuner control 1 MSB Table 46. Addr 34 test tuner control 2 MSB Table ...
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Appendix 6 Appendix Figure 8. Block diagram I/Q mixer Figure 9. Block diagram VCO 64/76 TDA7540N ...
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TDA7540N Figure 10. Block diagram keying AGC Figure 11. Block diagram ISS function Appendix 65/76 ...
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Appendix Block diagram quality detection principle (without overdeviation correction) Table 52. Block diagram quality detection principle Signal ac No adjacent channel ac+ No strong adjacent channel sm Fieldstrength higher as softmute threshold dev Deviation lower as threshold DWTH dev+ Deviation ...
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TDA7540N Figure 12. Block diagram AM part Appendix 67/76 ...
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Appendix Figure 13. Block diagram AM IF noise blanker Figure 14. Block diagram stereodecoder 68/76 TDA7540N ...
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TDA7540N Figure 15. Block diagram audio noise blanker Figure 16. Block diagram multipath detection Appendix 69/76 ...
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Appendix Figure 17. Block diagram AFS function 70/76 TDA7540N ...
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TDA7540N 7 Part list Table 54. Part list (application- and measurment circuit) Item L2, CF1,CF2 CF3 CF4 D1 D2, Description TOKO 5KM 396INS-A543EK TOKO MC152 E558HNA-100092 TOKO 7PSG P826RC-5134N ...
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Application circuit 8 Application circuit Figure 18. Application circuit 72/76 TDA7540N ...
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TDA7540N 9 Application notes Following items are important to get highest performance of TDA7540N in application order to avoid leakage current from PLL loop filter input to ground a guardring is recommended around loop filter PIN’s with PLL ...
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Package information 10 Package information In order to meet environmental requirements, ST offers these devices in ECOPACK® packages. These packages have a lead-free second level interconnect. The category of second level interconnect is marked on the package and on the ...
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TDA7540N 11 Revision history Table 55. Document revision history Date 12-Nov-2007 Revision 1 Initial release. Revision history Changes 75/76 ...
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