TDA7541B STMicroelectronics, TDA7541B Datasheet
TDA7541B
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TDA7541B Summary of contents
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... Fully electronic alignment – Independent weather band input – All functions I 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 ...
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... Quality detection and ISS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 26 Block diagram quality detection principle . . . . . . . . . . . . . . . . . . . . . . . . 29 Strong adjacent channel correction . . . . . . . . . . . . . . . . . . . . . . . . . . . . 30 Weak signal mute . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 30 Weather band input . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 31 Usage of control bit ADSEL (Addr23D7 Decoder . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 32 Noise blanker . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 34 Functional description of the multipath detector . . . . . . . . . . . . . . . . . . 37 Quality detector . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 37 AFS control and stereo decoder mute . . . . . . . . . . . . . . . . . . . . . . . . . . 37 Doc ID 16048 Rev 1 TDA7541B ...
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... TDA7541B 4.4.1 4.4 bus interface . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 39 5 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 PLL frequency synthesizer block . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 38 IF counter block . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 39 ...
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... Addr 19 SD High cut (2Fh Table 37. Addr (FM 97h, AM 3Fh Table 38. Addr 21 SD Quality (FFM 7Ah, AM FAh Table 39. Addr (FM 05h, AM 04h Table 40. Addr (FM E2h, AM C2h Table 41. Addr 24, 26, 27, 28, 29 testing (FEh Table 42. Addr 25 Testing (FEh Table 43. Document revision history . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 76 4/ bus Doc ID 16048 Rev 1 TDA7541B ...
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... TDA7541B List of figures Figure 1. Block circuit diagram Figure 2. Pin connection (top view Figure 3. Programming of HC filter . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 33 Figure 4. Programming of stereo blend . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 34 Figure 5. Adaptive threshold control of noise blanker . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 35 Figure 6. Stereo blend controlled threshold adjust . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 36 Figure 7. Deviation controlled threshold adjust . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 36 Figure 8. Block diagram FM part . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 68 Figure 9 ...
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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 Doc ID 16048 Rev 1 Pin connection and pin description VREF1 47 AMIF2IN 46 GNDDEM 45 FMREFDEMC 44 AMIF2REF ...
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... Multiplexer Output Search Stop Output Bus Data Bus Clock Unweighted Field Strength Output S-meter Filtering Capacitor Xtal Oscillator to MOS Gate ISS Filter Time Constant1 (slow) ISS Filter Time Constant2 (fast) Xtal Oscillator to MOS Drain Digital Ground Doc ID 16048 Rev 1 TDA7541B Function ...
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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 50 MIX2AMPOUT 51 VCC2 52 MIX2REF 53 MIX2OUT 54 AMRFAGCTC 55 MIX2INREF 56 MIX2IN 57 AMAGC2TC 58 IF1REF 59 IF1AMPOUT 60 VCCIF1 61 IF1AMPIN 62 GNDIF1 63 MIX1REF 64 MIX1OUT Pin connection and pin description Pin name ...
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... Parameter Parameter Conditions - - - Human Body Model Machine Model Charged Device Model = CC2 CCMIX1 CCVCO Test conditions - - - - - Doc ID 16048 Rev 1 TDA7541B Value Max. 70 Value 9.5 - -55 to +150 2 100 300 = 8 10.25 MHz, CCIF Xtal Min. Typ. Max. 7.7 8.5 9 7.7 8.5 9 7.7 8 ...
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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 reference voltage REF2 bus interface 3.1 f Clock frequency SCL 3 ...
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... Differential Differential - - Unloaded With 330 Ω load - Referred to diff. mixer input - PH Ratio wanted/image With phase adjust Single ended Single ended - - unloaded Source impedance 400 Ω Doc ID 16048 Rev 1 TDA7541B Min. Typ. Max. Unit - - 0.5 V -33 -25 -17.5 µA 1.7 2.5 3 µ -16 mA kΩ ...
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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 IIP3 3 order Intermodulation 11. Mixer2 (450kHz) 11.1 R Input resistance IN 11.2 C Input capacitance IN 11 input voltage 55 ...
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... SL=”101” V > 120 dBμV, FMON=1, 56 SL=”101” - FSU FSU dBμV, FMON = 0, 47 SL= ”010” dBμV, FMON = 0, 47 SL= ”010” dBμV, FMON = 0, 47 SL= ”010” V > 100 dBμV, FMON = 0, 47 SL= ”010” Doc ID 16048 Rev 1 TDA7541B Min. Typ. Max. Unit 2 3 ...
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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 HP 13.23 f Attenuation 20dB -20dB 13.24 f Centre frequency BP Multipath channel gain 13.25 G Gain MP Multipath bandpass filter 13.26 ...
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... TDEV TDEV DWTH µA 3 DWTH µA 3 DTH DTH WMTH = 0, WMD = WMTH = 7, WMD = WMD = 0, WMTH = 7, V =OFF 56 WMD = 7, WMTH = 7, V =OFF 56 WMD, WMTH ACMTH ACMD - - - - - - Doc ID 16048 Rev 1 TDA7541B Min. Typ. Max. Unit µA - 0.1 0.2 V 4.6 4 -40 -32 -20 µA -48 -39 -30 µA ...
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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 17.3 a IF1 rejection IF 17.4 V Min. RF AGC threshold 3 17.5 V Max. RF AGC threshold 3 17.6 V Min. IF AGC threshold 61 17.7 V Max. IF AGC threshold 61 17 ...
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... G , referred to 2 kΩ input max G , referred to 2 kΩ input max dBV off 56 Input carrier voltage Between start of AGC2 and the intervention point of prestage AGC Seek mode Doc ID 16048 Rev 1 TDA7541B Min. Typ. Max. Unit - 2 3.7 4.0 4 440 - µA/V - ...
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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. AGC output voltage 57 25. AM audio output 25.1 V Audio output voltage 43 25.2 THD Total harmonic distortion 25 ...
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... DEEMP = 1, High Cut OFF DEEMP = 0, High Cut ON, V =0.1V 28 DEEMP= 1, High Cut ON 0 Voutmax/Vout 3.5 kHz, DEEMP = 0, AMCF “111” Voutmax/Vout 3.5 kHz, DEEMP= 0, AMCF “000” SBC SBC SBC HCHT HCHT Doc ID 16048 Rev 1 TDA7541B Min. Typ. Max. Unit 0.02 0 ...
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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 32. Carrier and harmonic suppression at the output 32 ...
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... Signal PEAK in testmode, V =1V, NBSMP=0, NBMP=1, MPTC NBRR=01 Signal PEAK in testmode 1V, NBSMP = 1, MPTC NBMP = 0, NBRR = 01 Signal PEAK in testmode MBSMP=1, MPTC NBMP=1, NBRR=01 MPG = 00 MPG = 11 MPRG = 01 MPRG = 11 MPCC = 0 MPCC = 1 QDC Doc ID 16048 Rev 1 TDA7541B Min. Typ. Max. Unit - 0 2 μ μ mV/μs - ...
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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 pilot signal kHz or 13 kHz. 2. Traffic radio (V.F.) suppression measured with: 91% stereo signal; 9% pilot signal; fm=1 kHz; 5% sub carrier (f=57 kHz, fm=23 Hz AM, m= ...
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... CCIF Xtal Min. Typ. Max. 160 - - - - 260 - 10.25 - 110 - - - 400 - - 2 0. 23 550 - - 500 - - 1 1.9 - -0.1 - 0.1 -0.1 - 0.1 - 0.05 0 CCVCO CCVCO - 0 TDA7541B Unit MHz MHz √ dBc/ Hz MHz √ dBc rms ppm/V ppm/K μA μA μA μ μA μ ...
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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 44.5 R Output impedance OUT 44.6 R Output impedance OUT 45. SSTOP output (open collector) 45.1 ...
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... ISS filter control signals in weak signal condition possible to combine the IF counter result with this voltage VFSWO by programmable comparator threshold (SSTH). 26/ This internal voltage V FSUint FSUint Doc ID 16048 Rev 1 C bus. is used for AM IF noise blanker bus (FSWO and SL) for TDA7541B ...
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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 this comparator is controlling the charge and discharge of the external capacitor at PIN30 or PIN31 (dependent on SEEK) with programmable discharge current (TISS) ...
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... ISS filter is in automatic control mode 0 1 Filter activation defined by control table mode1 band width fixed to 80 kHz ISS filter is in automatic control mode 1 1 Filter activation defined by control table mode2 band width fixed to 80 kHz Doc ID 16048 Rev 1 TDA7541B Notes ...
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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 kHz, IF2Q=”00”) “ ...
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... Doc ID 16048 Rev 1 Mode1 Mode2 int80 Function inton int80 0 wide wide wide narrow wide wide narrow narrow mid mid 1 1 TDA7541B Function wide wide wide narrow mid wide mid narrow mid narrow ...
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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 IF2Q=”00” and the ISS filter must be set in manual control mode (ISSON=”1”). ...
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... Stereo decoder 4.3.1 Decoder The stereo decoder-part of the TDA7541B contains all functions necessary to demodulate the MPX-signal, like pilot tone-dependent MONO/STEREO switching as well as the stereo blend and high cut. Adaptations like programmable input gain, roll-off compensation, selectable de-emphasis time constant and a programmable field strength input allow easy adoption to different applications ...
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... VPTHST. Two different thresholds are available. The status of the detector output can be checked by reading the status byte of the 2 TDA7541B via I C bus or by reading the STEREO status at MUX pin23. Field strength control The field strength input is used to control the high cut- and the stereo blend-function. In addition the signal can be also used to control the noise blanker thresholds and as input for the multipath detector ...
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... In a first stage the spikes must be detected but to avoid a wrong triggering on high frequency (white) noise a complex trigger control is implemented. Behind the trigger stage a pulse former generates the "blanking"-pulse. An own biasing circuit supplies the noise blanker in order to avoid any cross talk to the signal path. 34/77 V REF1 = ---------------------------------------------------- fullstereo FSTC Doc ID 16048 Rev 1 TDA7541B ...
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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, VRECT, is low pass filtered to generate a signal called V ...
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... Level is below 2 multipath influence on noise blanker is switched ON than MPF bit has to be set to 0. 36/77 MONO STEREO ATC_SB OFF (11) noisy signal V PEAK [ 2.0 1.5 1.0 0 Doc ID 16048 Rev 1 TDA7541B 2.0V (00) 1.6V (01) 1.4V (10) 0.8V good signal Detector off DEVIATION [KHz] Discharge ...
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... MPCC. 4.3.4 Quality detector The TDA7541B offers a quality detector output, which gives a voltage representing the FM- reception conditions. To calculate this voltage the MPX-noise and the multipath-detector output are summed according to the following formula: The V signal is described in noise blanker session ...
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... After reaching a phase difference about lower than 40 ns the inlock detector is automatically switching the charge-pump in low current mode (LDENA). 38/77 [ ⋅ ƒ VCOdiv ≤ For correct operation PLL (RC) can be chosen by IIC-bus. REF . This phase error signal drives the charge pump current generator. REF Doc ID 16048 Rev 1 ] ƒ ⋅ REF ≥ A TDA7541B ...
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... I C bus interface The TDA7541B 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 slave. The master will always initiate data transfer and provide the clock to transmit or receive operations. ...
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... The TDA7541B connected to the bus will compare their own hardwired address with the slave address being transmitted, after detecting a START condition. After this comparison, the TDA7541B will generate an "acknowledge" on the SDA line and will do either a read or a write operation according to the state of R/W bit. ...
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... After each word receipt the TDA7541B will answer with an "acknowledge". Read operation If the master sends a slave address word with the R/W bit set to "1", the TDA7541B will transmit one 8-bit data word. This data word includes the following informations. bit0 (ISS filter ON OFF) ...
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... Acknowledge) – stop condition (P) Receive mode Transmission mode Start P = Stop ACK = Acknowledge D = Device address I = Auto increment mode A = Sub address R = Read bit 42/ ACK ACK ACK Doc ID 16048 Rev ACK DATABYTEACK P P TDA7541B ...
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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 AMD7 T AGC 6 LNA7 T Quality AC 7 TISS7 T Quality ACM/MP 8 MPTH7 T Quality DEV 9 ISSM T Quality MUX/FSU 10 SSTH7 ...
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... HCMAX Maximum high cut depth ICP Charge pump current tuner PLL IF1G IF1 Amplifier Gain IF2A IF2 LC band pass fine adjust IF2Q IF2 LC band pass quality adjust IFAGC FM/AM IF AGC threshold IFAGCS AM IFAGC threshold shift 44/77 Function Doc ID 16048 Rev 1 TDA7541B ...
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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 filter application mode KAGC FM keying AGC LDENA ...
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... VCOD Tuner VCO divider VCON STD VCO “ON/OFF” WBON Weather band mode (ISS filter band width 24 kHz) WMD Weak signal mute depth WMTH Weak signal mute start point threshold XTAL Xtal frequency fine adjust 46/77 Function Doc ID 16048 Rev 1 TDA7541B ...
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... TDA7541B 5.4 Data byte specification Table 16. Subaddress description MSB - - Table 17. Addr 0 TPLL charge pump control (0Bh) MSB LSB Charge pump control 1 1 Audio noise blanker II Page mode “OFF” Page mode enable LSB ICP<2:0> Charge pump current = 50 µ Charge pump current = 0.5 mA ...
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... LSB = 254 LSB = 255 LSB PC<15:8> MSB = MSB = 256 MSB = 512 MSB = 64768 MSB = 65024 MSB = 65280 MSB = 65536 LSB TVO<7:0> Tuning Voltage Offset = 0mV TVO = TVO = TVO = 3150 TVO = 3175 mV -TVO - - - +TVO Doc ID 16048 Rev 1 TDA7541B Function Function Function ...
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... TDA7541B Table 21. Addr 4 TV/IF Counter (FM ACh, AM 1Ch) Addr25 MSB LSB TVO Disable additional TV offset 1 Enable additional TV offset + 3.175 V TVM - - - tracking with PLL independing on PLL ISSENA - - ISS Filter switched off (bypass of filter, wide) 1 ISS filter control enable IFS<4:3> EW<6:5> Δf = 12.5 kHz (FM) 2 kHz (AM) Δ ...
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... RC<5:3> PLL reference frequency 2 kHz PLL reference frequency 9 kHz - - - PLL reference frequency 10 kHz (AM) PLL reference frequency 25 kHz PLL reference frequency 50 kHz (FM) AMD<7:6> AM VCO predivider ratio VCO predivider ratio 8 AM VCO predivider ratio 6 AM VCO predivider ratio 4 Doc ID 16048 Rev 1 TDA7541B Function ...
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... TDA7541B Table 23. Addr 6 AGC (FM 06h, AM 2Ah) Addr12 MSB LSB RFAGC<1:0> RFAGC threshold RFAGC threshold RFAGC threshold RFAGC threshold FM V IFAGC<3:2> IFAGC threshold IFAGC threshold IFAGC threshold IFAGC threshold IFAGC threshold IFAGC threshold IFAGC threshold IFAGC threshold FM V DAGC<5:4> DAGC DAGC V 56 ...
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... Doc ID 16048 Rev 1 TDA7541B Function ...
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... TDA7541B Table 25. Addr 8 Quality ACM/MP (FM 6Ah) MSB LSB ACMTH<2:0> mute threshold mute threshold mute threshold 150 mute threshold 240 mute OFF ACMD - - - Adjacent channel mute depth -4 dB Adjacent channel mute depth -6 dB MPENA - - - Multipath control “ON” Multipath control “OFF” ...
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... DEV threshold for ISS filter “OFF” ratio 1.4 DEV threshold for ISS filter “OFF” ratio 1.3 DEV threshold for ISS filter “OFF” ratio 1 ISSM - - - ISS filter application mode 1 ISS filter application mode 2 Doc ID 16048 Rev 1 TDA7541B Function ...
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... TDA7541B Table 27. Addr 10 Quality MUX/FSU (FM 0Eh, AM 0Fh) MSB Table 28. Addr 11 Weak Signal Mute (FM A8h) MSB LSB MUX<1:0> Detected multipath information at PIN Detected adjacent channel information at PIN Quality information stereo decoder at PIN FMON=1: Stereo indication at PIN 23 FMON=0: AM IF2 signal at PIN 23 SACCE Strong adjacent channel correction disable ...
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... S meter slope FM = 0.80 V/20 dB 1.75 V/ meter slope FM = 0.85 V/20 dB 1.89 V/ meter slope FM = 0.90 V/20 dB 1.98 V/ meter slope FM = 0.95 V/20 dB 2.04 V/ meter slope FM = 1.0 V/20 dB 2.1 V/ meter slope FM = 1.05 V/20 dB 2.15 V/ meter slope FM = 1.1 V/20 dB 2.20 V/20 dB Doc ID 16048 Rev 1 TDA7541B Function Function ...
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... TDA7541B Table 31. Addr 14 IF2 adjust (FM E8h, AM 08h) MSB LSB IF2A<3:0> adj 2,2 pF adj 4,4 pF adj 6,6 pF adj 8,8 pF adj 17,6 pF adj adj IF2Q<5:4> Q=28/gain=26 dB, FM Q=28/gain=16 dB int - - - R =5 kOhm, FM Q=3/gain=14 dB, BW=150 kHz int R =4,1 kOhm, FM Q=2,5/gain=14 dB, BW=180 kHz int R =3,3 kOhm, FM Q=2,05/gain=14 dB, BW=220 kHz int IF1G< ...
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... S1 LOW output voltage S1 HIGH output voltage SWM - - - S1 emitter output available S1 open collector output available DSB<7:6> FM demodulator spike cancellation ”OFF” Threshold for FM demodulator spike cancellation 630 mV Threshold for FM demodulator spike cancellation 400 mV Threshold for FM demodulator spike cancellation 520 mV Doc ID 16048 Rev 1 TDA7541B Function ...
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... TDA7541B Table 33. Addr 16 FM keying AGC (FM 1Dh) MSB LSB ODENA - - 0 Over deviation correction disable 1 Over deviation correction enable ODCUR - 0 - over deviation correction current max=45 µA 1 over deviation correction current max=90 µA KAGC<4:2> 0 KAGC threshold 3,60 KAGC threshold 3,65 KAGC threshold 3,70* V ...
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... Roll-Off compensation 15 Roll-Off compensation 13 Roll-Off compensation 12 Roll-Off compensation 10 Roll-Off compensation 9 Roll-Off compensation 7 Roll-Off compensation 6 Roll-Off compensation 4 Roll-Off compensation 3 Roll-Off compensation 1.6 % LG<7:4> Level gain 0 dB Level gain 0. Level gain 1.10 dB Level gain 3.85 dB Level gain 8.25 dB Doc ID 16048 Rev 1 TDA7541B Function ...
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... TDA7541B Table 35. Addr 18 SD Stereoblend / AM corner frequency (0Dh) MSB LSB SBC<2:0> Stereoblend control REF5V Stereoblend control REF5V Stereoblend control REF5V Stereoblend control REF5V Stereoblend control REF5V Stereoblend control REF5V Stereoblend control REF5V Stereoblend control REF5V PTH - - - Pilot threshold high Pilot threshold low ...
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... Start level high cut @ 58 % REF5V Start level high cut @ 66 % REF5V HCLT<6:5> Stop level high cut @ Stop level high cut @ 18 Stop level high cut @ 25 Stop level high cut @ DEEMP - - - De-emphasis 50 µs De-emphasis 75 µs Doc ID 16048 Rev 1 TDA7541B Function HCHT HCHT HCHT HCHT ...
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... TDA7541B Table 37. Addr (FM 97h, AM 3Fh) MSB LSB MPG<1:0> Multipath detector gain = Multipath detector gain = Multipath detector gain = Multipath detector gain =10.5 dB MPRG<3:2> 0 Multipath detector rectifier gain =7 Multipath detector rectifier gain =4 Multipath detector rectifier gain = Multipath detector rectifier gain disabled MPCC - - - Multipath detector charge current =0,8 µ ...
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... Noise blanker deviation adjust 1.0 V Noise blanker deviation adjust “OFF” NBFC<7:6> Noise blanker field strength adjust 2 Noise blanker field strength adjust 1.6 V Noise blanker field strength adjust 1.4 V Noise blanker field strength adjust “OFF” Doc ID 16048 Rev 1 TDA7541B Function ...
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... TDA7541B Table 39. Addr (FM 05h, AM 04h) MSB LSB NBENA - - 0 Audio noise blanker “OFF” 1 Audio noise blanker “ON” NBT<2:1> Audio noise blanking time 38 µ Audio noise blanking time 25,5 µ Audio noise blanking time 32 µ Audio noise blanking time 22 µs NBLT<5:3> ...
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... Strong multipath influence on peak discharge “OFF” Strong multipath influence on peak discharge “ON” VCON - - - Stereo decoder VCO “OFF” Stereo decoder VCO “ON” PCM - - - Pilot cancellation mode: always Pilot cancellation mode: if pilot > pilot threshold ADSEL - - - Additional selectivity OFF Additional selectivity ON Doc ID 16048 Rev 1 TDA7541B Function ...
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... TDA7541B Table 41. Addr 24, 26, 27, 28, 29 testing (FEh) MSB Table 42. Addr 25 Testing (FEh) MSB LSB Only for testing LSB Only for testing IFSEXP - - - Enable expand mode of IF sampling time (see addr 4) Disable expand mode of IF sampling time EWEXP - - - Enable expand mode of error window (see addr 4) ...
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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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... FMDEMOut (2nd. order) 72/77 MPXIN MPTC FSTC FMON Deviation detector NBDC Integrator discharge control Rectifier NBMP NBPC NBSMP NBRR MPTC Doc ID 16048 Rev 1 TDA7541B Stereo decoder S&H NBENA Monoflop FM:22-40µs AM:0.3-1.2ms FMON VTH Threshold generator NBCT NBLT Fieldstrenght adjust NBFC L R ...
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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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... MI 55 MIX2IN 56 2.2µ GC2TC AMA 57 100n IF1REF 58 IF1AMPOUT 59 100n VCCIF1 4.7 60 IF1AMPIN 61 GNDIF nH 680 62 MIX1REF 63 330p MIX1OUT 64 Doc ID 16048 Rev 1 TDA7541B R L XTALD 32 3.3n ISSTC2 31 330n ISSTC1 30 XTALG 29 100n FSTC 28 FSU FSU 27 SCL SCL 26 SDA SDA 25 SSTOP SSTOP 24 MUX MUX ...
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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. ® ECOPACK trademark. Figure 16. LQFP64 mechanical data and package dimensions DIM. ...
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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. ...