TDA7512 AM/FM CAR RADIO TUNER IC WITH INTELLIGENT SELECTIVITY SYSTEM (ISS) PRELIMINARY DATA FM-PART ■ RF AGC GENERATION BY RF AND IF DETECTION ■ I/Q MIXER FOR 1ST FM IF 10.7MHz WITH IMAGE REJECTION ■ 2 PROGRAMMABLE IF-GAIN STAGES nd ■ MIXER FOR 2 IF 450KHz ■ INTERNAL 450KHz BANDPASS FILTER WITH THREE BANDWIDTHS CONTROLLED BY ISS ■ TQFP64 ORDERING NUMBER: TDA7512 FULLY INTEGRATED FM-DEMODULATOR WITH NOISE CANCELLATION AM-PART ■ WIDE AND NARROW AGC GENERATION ■ PREAMPLIFIER AND MIXER FOR 1ST IF 10.7MHz, AM UPCONVERSION nd ■ MIXER FOR 2 IF 450KHz ■ INTEGRATED AM-DEMODULATOR ■ OUTPUT FOR AM-STEREO-DECODER ■ ■ ■ ■ ■ ADDITIONAL FEATURES ■ VCO FOR WORLD TUNING RANGE ■ 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 ■ QUALITY DETECTION INFORMATIONS AS ANALOG SIGNALS EXTERNAL AVAILABLE ISS (INTELLIGENT SELECTIVITY SYSTEM) FOR CANCELLATION OF ADJACENT CHANNEL AND NOISE INFLUENCES ADJACENT CHANNEL MUTE FULLY ELECTRONIC ALIGNMENT ALL FUNCTIONS I2C-BUS CONTROLLED ISS FILTER STATUS INFORMATION I2C-BUS READABLE DESCRIPTION The TDA7512 is a high performance tuner circuit for AM/FM car radio. It contains mixer, IF amplifier, demodulator for AM and FM, 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. September 2003 This is preliminary information on a new product now in development or undergoing evaluation. Details are subject to change without notice. 1/42 TDA7512 BLOCK DIAGRAM 2/42 TDA7512 GNDVCC2 FMAMP2OUT VCC2 FMAMP2IN FMIF1REF FMAMP1OUT AMMIX2OUT2 AMMIX2OUT1 FMAMP1IN AMIF1IN/ISS FMIF1AGCIN GNDIF1 VCCIF1 AMRFAGCTC MIX1OUT2 MIX1OUT1 PIN CONNECTION (Top view) 64 63 62 61 60 59 58 57 56 55 54 53 52 51 50 49 AMMIX1IN2 1 48 VREF1 AMMIX1IN1 2 47 GNDDEM AMRFAGCIN 3 46 FMMIX2IN1 AMRFAGCOUT 4 45 FMMIX2IN2 AMPINDR 5 44 REFDEMC FM/AM FMPINDR 6 43 AMIF2IN FMMIX1IN1 7 42 MUTETC GNDRF 8 41 AMDETC FMMIX1IN2 9 40 AMAGC2TC FMAGCTC 10 39 AMIFBPF TV1 11 38 AMIFREF TV2 12 37 MPX/AFAM ADJCH 13 36 VCC1 FSU 14 35 FSW ISSTC 15 34 AMST/MP VCCVCO 16 33 GNDVCC1 LPHC LPFM LPAM VREF2 LPOUT VCC3 SCL SDA SSTOP GNDVCC3 XTALD XTALG DEVTC VCOE VCOB GNDVCO 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 TQFP64 PIN DESCRIPTION N° Pin Name Function 1 AMMIX1IN2 AM Input2 Mixer1 2 AMMIX1IN1 AM Input1 Mixer1 3 AMRFAGCIN Input AM RF AGC 4 AMRFAGCOUT 5 AMPINDR AM PIN Diode Driver Output 6 FMPINDR FM PIN Diode Driver Output 7 FMMIX1IN1 8 GNDRF 9 FMMIX1IN2 FM Input2 Mixer1 10 FMAGCTC FM AGC Time Constant 11 TV1 Tuning Voltage Preselection1 12 TV2 Tuning Voltage Preselection2 13 ADJCH Output AM RF AGC FM Input1 Mixer1 RF Ground Ident. Adjacent Channel Output 3/42 TDA7512 PIN DESCRIPTION (continued) N° Pin Name 14 FSU 15 ISSTC 16 VCCVCO VCO Supply 17 GNDVCO VCO Ground 18 VCOB VCO Input Base 19 VCOE VCO Output Emitter 20 DEVTC Deviation Detector Time Constant 21 XTALG Xtal Oscillator to MOS Gate 22 XTALD Xtal Oscillator to MOS Drain 23 GNDVCC3 24 SSTOP 25 SDA I2C-Bus Data 26 SCL I2C-Bus Clock 27 VCC3 28 LPOUT Op Amp Output to PLL Loop Filters 29 VREF2 Voltage Reference for PLL Op Amp 30 LPAM Op Amp Input to PLL Loop Filters AM 31 LPFM Op Amp Input to PLL Loop Filters FM 32 LPHC High Current PLL Loop Filter Input 33 GNDVCC1 Digital Ground 34 AMST/MP AM Stereo Out / Ident. Multipath Output 35 FSW Weighted Fieldstrength Output 36 VCC1 Digital Supply 37 MPX/AFAM 38 AMIFREF Reference Voltage AM IF Amp 39 AMIFBPF AM IF Filter 40 AMAGC2TC 41 AMDETC AM Detector Capacitor 42 MUTETC Softmute Time Constant 43 AMIF2IN Input AM IF2 44 REFDEMC FM/AM 45 FMMIX2IN2 4/42 Function Unweighted Fieldstrength Output Time Constant for ISS Filter Switch VCC3 Ground Search Stop Output Supply Tuning Voltage MPX Output / AM AF Output AM AGC2 Time Constant Demodulator Reference FM/AM FM IF1 MIX2 Input1 TDA7512 PIN DESCRIPTION (continued) N° Pin Name Function 46 FMMIX2IN1 47 GNDDEM 48 VREF1 49 GNDVCC2 50 FMAMP2OUT 51 VCC2 52 FMAMP2IN FM IF1 Amplifier2 Input 53 FMIF1REF FM IF1 Amplifier Reference 54 FMAMP1OUT FM IF1 Amplifier1 Output 55 AMMIX2OUT2 AM Tank 450kHz 56 AMMIX2OUT1 AM Tank 450kHz 57 FMAMP1IN 58 AMIF1IN/ISS 59 GNDIF1 60 FMIF1AGCIN 61 VCCIF1 62 AMRFAGCTC 63 MIX1OUT2 MIX Tank 10.7MHz 64 MIX1OUT1 MIX Tank 10.7MHz FM IF1 MIX2 Input2 Ground FM Demodulator Reference 5V Analog Ground FM IF1 Amplifier2 Output Analog Supply FM IF1 Amplifier1 Input AM IF1 Input/ISS filter status FM IF1 Ground FM IF1 AGC Input IF1 Supply AM RF AGC Time Constant THERMAL DATA Table 1. Symbol Rth(j-a) Parameter Thermal resistance junction to ambient Value Unit 68 max. °C/W Value Unit ABSOLUTE MAXIMUM RATINGS Table 2. Symbol VS Parameter 10.5 V Tamb Supply Voltage Ambient Temperature -40 to 85 °C Tstg Storage Temperature -55 to +150 °C 5/42 TDA7512 Table 3. ELECTRICAL CHARACTERISTICS Tamb = +25°C, VCC1 = VCC2 = VCC3 = VCCVCO = VCCMIX1 = VCCIF1=8.5V, fRF = 98MHz, dev. = 40kHz, fMOD = 1kHz, fIF1 = 10.7MHz, fIF2 = 450KHz, fXtal = 10.25MHz, in application circuit, unless otherwise specified. Symbol Parameter Test Condition Min. Typ. Max. Unit Supply VCC1 Digital supply voltage 7.5 8.5 10 V VCC2 Analog supply voltage 7.5 8.5 10 V VCC3 Analog tuning voltage 7.5 8.5 10 V VCCVCO VCO supply voltage 7.5 8.5 10 V VCCMIX1 MIX1 supply voltage 7.5 8.5 10 V VCCMIX2 MIX2 supply voltage 7.5 8.5 10 V IF1 supply voltage 7.5 8.5 10 V VCCIF1 ICC1 Supply current FM ON 7.5 mA ICC1 Supply current AM ON 10 mA ICC2 Supply current FM ON / VCO:3 70 mA ICC2 Supply current AM ON 70 mA ICC3 Supply current 2 mA ICCVCO Supply current 9 mA ICCMIX1 Supply current FM ON 8 mA ICCMIX1 Supply current AM ON 7 mA ICCMIX2 Supply current AM ON 7 mA ICCIF1 Supply current 6 mA Reference Voltages VREF1 Internal reference voltage IREF1 = 0mA 5 V VREF2 Internal reference voltage IREF2 = 0mA 2.5 V Wide Band RF AGC V7-9 Lower threshold start V10 = 2.5V 85 dBµV V7-9 Upper threshold start V10 = 2.5V 96 dBµV Narrow Band IF & Keying AGC V60 Lower threshold start KAGC = off, V7-9 = 0mVRMS 86 dBµV V60 Upper threshold start KAGC = off, V7-9 = 0mVRMS 98 dBµV 6/42 TDA7512 Table 3. ELECTRICAL CHARACTERISTICS (continued) Tamb = +25°C, VCC1 = VCC2 = VCC3 = VCCVCO = VCCMIX1 = VCCIF1=8.5V, fRF = 98MHz, dev. = 40kHz, fMOD = 1kHz, fIF1 = 10.7MHz, fIF2 = 450KHz, fXtal = 10.25MHz, in application circuit, unless otherwise specified. Symbol Parameter V60 Lower threshold start with KAGC V35 Startpoint KAGC Test Condition Min. Typ. Max. Unit KAGC = max, V7-9 = 0mVRMS, 98 dBµV KAGC = max, V7-9 = 0mVRMS, 3.6 V 16 dB ∆fIF=300KHz ∆fIF=300KHz fIF1 generate FSW level at V35 ∆ Control range KAGC ∆V35= +0.4V RIN Input resistance 10 kΩ CIN Input capacitance 2.5 pF AGC Time Constant Output V10 Max. AGC output voltage V7-9 = 0mVRMS VREF1 +VBE V V10 Min. AGC output voltage V7-9 = 50mVRMS 0.5 V I10 Min. AGC charge current V7-9 = 0mVRMS,V10 = 2.5V -12.5 µA I10 Max. AGC discharge current V7-9 = 50mVRMS,V10 = 2.5V 1.25 mA AGC PIN Diode Driver Output I6 AGC OUT, current min. V7-9 = 0mVRMS, V6 = 2.5V 50 µA I6 AGC OUT, current max. V7-9 = 50 mVRMS, V6 = 2.5V -20 mA I/Q Mixer1 (10.7MHz) RIN Input resistance differential 10 kΩ CIN Input capacitance differential 4 pF ROUT Output resistance differential kΩ 100 V7,9 Input dc bias 3.2 V gm Conversion transconductance 17 mS F CP1dB Noise figure 400Ω generator resistance 3 dB 1dB compression point referred to diff. mixer input 100 dBµV 122 dBµV IIP3 3rd order intermodulation IQG I/Q gain adjust G -1 +1 % IQP I/Q phase adjust PH -7 +8 DEG IRR Image rejection ratio ratio wanted/image 30 40 dB IRR Image rejection ratio with gain and phase adjust 40 46 dB 7/42 TDA7512 Table 3. ELECTRICAL CHARACTERISTICS (continued) Tamb = +25°C, VCC1 = VCC2 = VCC3 = VCCVCO = VCCMIX1 = VCCIF1=8.5V, fRF = 98MHz, dev. = 40kHz, fMOD = 1kHz, fIF1 = 10.7MHz, fIF2 = 450KHz, fXtal = 10.25MHz, in application circuit, unless otherwise specified. Symbol Parameter Test Condition Min. Typ. Max. Unit IF1 Amplifier1 +2 (10.7MHz) Gmin Min. gain IFG 18 dB Gmax Max. gain IFG 26 dB Input resistance 330 Ω ROUT Output resistance 330 Ω CP1dB 1dB compression point referred to 330Ω input 105 dBµV 3rd order Intermodulation referred to 330Ω input 126 dBµV RIN IIP3 Mixer2 (450kHz) RIN Input impedance 330 Ω V46 Max. input voltage 900 mVRM S V48 G Limiting sensitivity S/N = 20dB Mixer gain 25 µV 18 dB 80 dB Limiter 1 (450kHz) GLimiter Gain Demodulator, Audio Output Dev.= 75kHz, V46 = 10mVRMS THD VMPX MPX output signal Dev.= 75kHz 0.1 500 % mVRM S ROUT Output resistance 50 Ω |∆V|min DC offset fine adjust DEM, MENA=1 8.5 mV |∆V|max DC offset fine adjust DEM, MENA=1 264 mV Dev.= 40kHz,V46 = 10mVRMS 76 dB 10 µV S/N Quality Detection S-meter, Unweighted Fieldstrength V46 Min. input voltage MIX2 V14 Fieldstrength output V46 = 0VRMS 0.1 V V14 Fieldstrength output V46 = 1VRMS 4.9 V ∆V14 voltage per decade SMSL = 0 1 V ∆V14 voltage per decade SMSL = 1 1.5 V 8/42 TDA7512 Table 3. ELECTRICAL CHARACTERISTICS (continued) Tamb = +25°C, VCC1 = VCC2 = VCC3 = VCCVCO = VCCMIX1 = VCCIF1=8.5V, fRF = 98MHz, dev. = 40kHz, fMOD = 1kHz, fIF1 = 10.7MHz, fIF2 = 450KHz, fXtal = 10.25MHz, in application circuit, unless otherwise specified. Symbol Parameter ∆V14 S-meter offset ROUT Output resistance TK Test Condition SL, SMSL=1 Min. Typ. -15 Temp coeff. Max. Unit 15 dB 200 Ω 0 ppm/K S-meter, Weighted Fieldstrength V35 Fieldstrength output V46 = 0VRMS 2.5 V V35 Fieldstrength output V46 = 1VRMS 4.9 V 12 kΩ ROUT Output resistance Adjacent Channel Gain Gmin Gain minimum ACG=0 32 dB Gmax Gain maximum ACG=1 38 dB Adjacent Channel Filter fHP -3dB frequency highpass ACF=0 100 kHz fBP Centre frequency ACF=1 100 kHz f-20dB Attenuation 20dB 70 kHz Adjacent Channel Output V13 Output voltage low 0.1 V V13 Output voltage high 4.9 V 4 kΩ ROUT Output resistance Multipath Channel Gain Gmin Gain minimum MPG=0 12 dB Gmax Gain maximum MPG=1 23 dB Multipath Bandpass Filter fLower Centre frequency low MPF=0 19 kHz fUpper Centre frequency up MPF=1 31 kHz Q Quality factor 5 10 Multipath Output V34 Output voltage low 0.1 V V34 Output voltage high 4.9 V Output resistance 2.5 kΩ ROUT 9/42 TDA7512 Table 3. ELECTRICAL CHARACTERISTICS (continued) Tamb = +25°C, VCC1 = VCC2 = VCC3 = VCCVCO = VCCMIX1 = VCCIF1=8.5V, fRF = 98MHz, dev. = 40kHz, fMOD = 1kHz, fIF1 = 10.7MHz, fIF2 = 450KHz, fXtal = 10.25MHz, in application circuit, unless otherwise specified. Symbol Parameter Test Condition Min. Typ. Max. Unit ISS (intelligent Selectivity System) Filter 450kHz fcentre Centre frequency fREF_intern = 450kHz 450 kHz BW 3dB Bandwidth, -3dB ISS80 = 1 80 kHz BW 20dB Bandwidth, -20dB ISS80 = 1 150 kHz BW 3dB Bandwidth, -3dB ISS80 = 0 120 kHz BW 20dB Bandwidth, -20dB ISS80 = 0 250 kHz Bandwidth weather band ISS30 = 1 30 kHz -20dB weather band ISS30 = 1 80 kHz BW 3dB BW 20dB Adjacent Channel ISS Filter Threshold VNTH Internal low threshold ACNTH 0 V VNTH Internal high threshold ACNTH 0.3 V VWTH Internal low threshold ACWTH 0.25 V VWTH Internal high threshold ACWTH 0.95 V Multipath Threshold VTHMP Internal low threshold MPTH 0.50 V VTHMP Internal high threshold MPTH 1.25 V ISS Filter Time Constant I15 Charge current low mid TISS, ISSCTL = 1 -74 µA I15 Charge current high mid TISS, ISSCTL = 1 -60 µA I15 Charge current low narrow TISS, ISSCTL = 1 -124 µA I15 Charge current high narrow TISS, ISSCTL = 1 -110 µA I15 Discharge current low TISS, ISSCTL = 0 1 µA I15 Discharge current high TISS, ISSCTL = 0 15 µA V15 Low voltage ISSCTL = 0 0.1 V 10/42 TDA7512 Table 3. ELECTRICAL CHARACTERISTICS (continued) Tamb = +25°C, VCC1 = VCC2 = VCC3 = VCCVCO = VCCMIX1 = VCCIF1=8.5V, fRF = 98MHz, dev. = 40kHz, fMOD = 1kHz, fIF1 = 10.7MHz, fIF2 = 450KHz, fXtal = 10.25MHz, in application circuit, unless otherwise specified. Symbol V15 Parameter High voltage Test Condition Min. Typ. Max. Unit ISSCTL = 1 4.9 V ISS Filter Switch Threshold V15 Threshold ISS on ISSCTL = 0 3 V V15 Threshold ISS off ISSCTL = 0 1 V V15 Threshold ISS narrow on ISSCTL = 0 4 V V15 Threshold ISS narrow off ISSCTL = 0 2 V I20 Charge current low TDEV -20 µA I20 Charge current high TDEV -34 µA I20 Discharge current low TDEV 6 µA I20 Discharge current high TDEV 20 µA DEVWTH Internal low threshold DWTH 30 kHz DEVWTH Internal high threshold DWTH 75 kHz RATIOmi Referred to threshold DTH 1 Referred to threshold DTH 1.5 VANT Upper startpoint SMTH, SMD, SLOPE = 0 10 dBµV VANT lower startpoint SMTH, SMD, SLOPE = 0 3 dBµV aSMmin Min. softmute depth SMD, SLOPE = 0, SMTHUpper 18 dB aSMmax Max. softmute depth SMD, SLOPE = 0, SMTHUpper 36 dB aSMTHIS Mute depth threshold for ISS filter on SMCTH 0.2 2 dB VACTH Internal AC mute threshold ACM 60 340 mV aSMAC AC mute depth ACMD 4 10 dB I42 Charge current I42 Discharge current n RATIOm ax Softmute S -47.5 µA 2.5 µA S/N Over All S/N VANT_min = 60dBµV, dev.= 40kHz,LP=15KHz deemphasis t = 50µs 66 dB 11/42 TDA7512 Table 4. ELECTRICAL CHARACTERISTICS Tamb = +25°C, VCC1 = VCC2 = VCC3 = VCCVCO = VCCMIX1 = VCCMIX2 = 8.5V, fRF = 1MHz, fMOD = 400Hz at 30% AMfIF1 = 10.7MHz, fIF2 = 450kHz, fxtal = 10.25MHz, in application circuit, (unless otherwise noted, VINRF antenna input). Symbol Parameter Test Condition Min. Typ. Max. Unit Global VANT min VANT us ∆VANT (S+N)/N aIF Max. sensitivity Ref.: VINRF = 60dBµV, Usable sensitivity (S+N)/N = 20 dB 30 IF2 AGC Range Ref.: VINRF = 60dBµV, 56 Signal to Noise Ratio Ref.: VINRF = 60ddBµV 50 IF rejection Ref: VINRF = 60dBµV, IF1 = 10.7MHz IF2 = 450kHz 100 100 19 dBµV 26 dBµV dB 60 dB dB dB Frequency response Ref.: VINRF = 60dBµV, ∆VAF = -3 dB 3.6 kHz THD Total Harmonic Distortion VINRF = 60dBµV, m = 0.8 m = 0.3 VINRF = 120 dbµV, m = 0.8 m = 0.3 0.5 0.3 1.0 0.3 % V37 Output level VINRF = 60dBµV 220 mVRM fAF S V34 Output level VINRF = 60dBµ, m=off 190 mVRM S V3 Min. RF AGC threshold Max. RF AGC threshold WAGC 90 109 dBµV dBµV V58 Min. IF AGC threshold Max. IF AGC threshold WAGC 90 109 dBµV dBµV V58 Min. DAGC threshold Max. DAGC threshold DAGC 74 96 dBµV dBµV |I40max| AGC2 charge current seek 160 µA CCR Charge current ratio seek/seek off 30 AGC Voltage Driver Output V4 Max. AGC output voltage V4 Min. AGC output voltage | I4 | AGC current 3.5 V 0.5 V 100 µA -2 mA AGC PIN Diode Driver Output I5 12/42 AGC driver current TDA7512 Table 4. ELECTRICAL CHARACTERISTICS (continued) Tamb = +25°C, VCC1 = VCC2 = VCC3 = VCCVCO = VCCMIX1 = VCCMIX2 = 8.5V, fRF = 1MHz, fMOD = 400Hz at 30% AMfIF1 = 10.7MHz, fIF2 = 450kHz, fxtal = 10.25MHz, in application circuit, (unless otherwise noted, VINRF antenna input). Symbol Parameter Test Condition Min. Typ. Max. Unit AM Mixer1 (10.7MHz) RIN Input resistance differential 1.2 kΩ CIN Input capacitance differential 4 pF ROUT Output impedance differential CP1dB 1dB compression point referred to diff. mixer input IIP3 3rd order intermodulation kΩ 100 115 dBµV 132 dBµV F Noise figure 8 dB A Gain 26 dB Cmin Min. capacitance step IF1T 0.55 pF Cmax Max. capacitance IF1T 8.25 pF IF1T 2 pF C31-64 AM Mixer2 (450kHz) R58 Input resistance 10 kΩ C58 Input capacitance 2.5 pF 120 dBµV 3rd order intermodulation 132 dBµV F Noise figure 12 dB A Max. gain 34 dB 20 dB CP1dB IIP3 ∆A 1dB compression point referred to diff. mixer input Mixer2 tank output Gain control range Cmin Min. cap step IF2T 1.6 pF Cmax Max. cap IF2T 24 pF IF2T 2 pF C55-56 13/42 TDA7512 Table 5. ADDITIONAL PARAMETERS Symbol Parameter Test Condition Min. Typ. Max. Unit VCC30.5 V Output of Tuning Voltages (TV1,TV2) VOUT Output voltage ROUT Output impedance TVO 0.5 20 kΩ Xtal Reference Oscillator Reference frequency CLoad = 15pF 10.25 MHz CStep Min. cap step XTAL 0.75 pF Cmax Max. cap XTAL 23.25 pF ∆f/f Deviation versus VCC2 ∆VCC2 = 1V 1.5 ppm/V ∆f/f Deviation versus temp -40°C < T < +85°C 0.2 ppm/K fLO I2C-Bus interface fSCL Clock frequency 400 kHz VIL Input low voltage 1 V VIH Input high voltage 3 IIN Input current -5 VO Output acknowledge voltage V IO = 1.6mA 5 µA 0.4 V Loop Filter Input/Output -IIN Input leakage current VIN = GND, PDOUT = Tristate -0.1 0.1 µA IIN Input leakage current VIN = VREF1 PDOUT = Tristate -0.1 0.1 µA VOL Output voltage Low IOUT = -0.2mA 0.5 V VOH Output voltage High IOUT = 0.2mA IOUT Output current, sink VOUT = 1V to VCC3-1V IOUT Output current, source VOUT = 1V to VCC3-1V 0.05 VCC30.5 VCC30.05 V 10 mA -10 mA 50 MHz Voltage Controlled Oscillator (VCO) fVCOmin Minimum VCO frequency fVCOmax Maximum VCO frequency C/N Carrier to Noise 260 fVCO= 200MHz, ∆f=1KHz, B=1Hz, closed loop 80 I24 = -200µA 0.2 MHz dBc SSTOP Output (Open Collector) V24 Output voltage low V24 Output voltage high -I24 Output leakage current V24 = 5V I24 Output current, sink V24 = 0.5V-5V 14/42 -0.1 0.5 V 5 V 0.1 µA 1 mA TDA7512 1. 1.1 1.2 Functional Description FM Section Mixer1, AGC and 1.IF FM quadrature I/Q-mixer converts FM RF to IF1 of 10.7MHz. The mixer provides inherent image rejection and wide dynamic range with low noise and large input signal performance. The mixer1 tank can be adjusted by software (IF1T). For accurate image rejection the gain- and phase-error generated as well in mixer as VCO stage can be compensated by software (G,PH) It is capable of tuning the US FM, US weather, Europe FM, Japan FM and East Europe FM bands – US FM = 87.9 to 107.9 MHz – US weather = 162.4 to 162.55 MHz – Europe FM = 87.5 to 108 MHz – Japan FM = 76 to 91 MHz – East Europe FM = 65.8 to 74 MHz The AGC operates on different sensitivities and bandwidths in order to improve the input sensitivity and dynamic range. AGC thresholds are programmable by software (RFAGC,IFAGC,KAGC). The output signal is a controlled current for double pin diode attenuator. Two 10.7MHz programmable amplifiers (IFG1, IFG2) correct the IF ceramic insertion loss and the costumer level plan application. 1.3 Mixer2, Limiter and Demodulator In this 2. mixer stage the first 10.7MHz IF is converted into the second 450kHz IF. A multi-stage limiter generates signals for the complete integrated demodulator without external tank. MPX output DC offset versus noise DC level is correctable by software (DEM). 1.4 1.4.1 Quality Detection and ISS Fieldstrength Parallel to mixer2 input a 10.7MHz limiter generates a signal for digital IF counter and a fieldstrength output signal. This internal unweighted fieldstrength is used for keying AGC, adjacent channel and multipath detection and is available at PIN14 (FSU) after +6dB buffer stage. The behaviour of this output signal can be corrected for DC offset (SL) and slope (SMSL). The internal generated unweighted fieldstrength is filtered at PIN35 and used for softmute function and generation of ISS filter switching signal for weak input level (sm). 1.4.2 Adjacent Channel Detector The input of the adjacent channel detector is AC coupled from internal unweighted fieldstrength. A programmable highpass or bandpass (ACF) and amplifier (ACG) as well as rectifier determines the influences. This voltage is compared with adjustable comparator1 thresholds (ACWTH, ACNTH). The output signal of this comparator generates a DC level at PIN15 by programmable time constant. Time control (TISS) for a present adjacent channel 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 I2C Bus. This level produces digital signals (ac, ac+) in an additional comparator4. The adjacent channel information is available as analog output signal after rectifier and +8dB output buffer. 1.4.3 Multipath Detector The input of the multipath detector is AC coupled from internal unweighted fieldstrength. A programmable bandpass (MPF) and amplifier (MPG) as well as rectifier determines the influences. This voltage is compared with an adjustable comparator2 thresholds (MPTH). The output signal of this comparator2 is used for the "Milano" effect. In this case the adjacent channel detection is switched off. The "Milano" effect is selectable by I2C Bus (MPOFF). The multipath information is available as analog output signal after rectifier and +8dB output buffer. 15/42 TDA7512 1.4.4 450kHz IF Narrow Bandpass Filter (ISS filter) The device gets an additional second IF narrow bandpass filter for suppression of noise and adjacent channel signal influences. This narrow filter has three switchable bandwidthes, narrow range of 80kHz, mid range of 120kHz and 30KHz for weather band information. Without ISS filter the IF bandwidth (wide range) is defined only by ceramic filter chain. The filter is switched in after mixer2 before 450kHz limiter stage. The centre frequency is matching to the demodulator center frequency. 1.4.5 Deviation Detector In order to avoid distortion in audio output signal the narrow ISS filter is switched OFF for present overdeviation. Hence the demodulator output signal is detected. A lowpass filtering and peak rectifier generates a signal that is defined by software controlled current (TDEV) in an external capacitance. This value is compared with a programmable comparator3 thresholds (DWTH, DTH) and generates two digital signals (dev, dev+). For weak signal condition deviation threshold is proportinal to FSU. 1.4.6 ISS Switch Logic All digital signals coming from adjacent channel detector, deviation detector and softmute are acting via switching matrix on ISS filter switch. The IF bandpass switch mode is controlled by software (ISSON, ISS30, ISS80, CTLOFF). The switch ON of the IF bandpass is also available by external manipulation of the voltage at PIN15. Two application modes are available (APPM). The conditions are described in table 34. 1.5 Soft Mute Control The external fieldstrength signal at PIN 35 is the reference for mute control. The startpoint and mute depth are programmable (SMTH, SMD) in a wide range. The time constant is defined by external capacitance. Additional adjacent channel mute function is supported. A highpass filter with -3dB threshold frequency of 100kHz, amplifier and peak rectifier generates an adjacent noise signal from MPX output with the same time constant for softmute. This value is compared with comparator5 thresholds (ACM). For present strong adjacent channel the MPX signal is additional attenuated (ACMD). 1.6 AM Section The up/down conversion is combined with gain control circuit sensing three input signals, narrow band information at PIN 39, upconversion signal (IFAGC) at PIN 58 and wide band information (RFAGC) at PIN 3.This gain control gives two output signals. The first one is a current for pin diode attenuator and the second one is a voltage for preamplifier. Time constant of RF- and IF-AGC is defined by internal 100k resistor and external capacitor at PIN 62. The intervention points for AGC (DAGC,WAGC) are programmable by software. In order to avoid a misbehaviour of AGC intervention point it is important to know that the DAGC threshold has to be lower than WAGC threshold ! The oscillator frequency for upconcersion-mixer1 is generated by dividing the FM VCO frequency after VCO (VCOD) and AM predivider(AMD). It is possible to put in a separate narrow bandpass filter before mixer2 at PIN 58. In this case input P58 needs the DC-operation point from PIN 53 via resistance matched with filter impedance. Additional it is possible to use second 10,7MHz ceramic filter by internal switch between mixer2 input and PIN 52. This feature increases 900KHz attenuation. In mixer2 the IF1 is downconverted into the IF2 450kHz. After filtering by ceramic filter a 450kHz amplifier is included with an additional gain control of IF2 below DAGC threshold. Time constant is defined by capacitance at PIN 40 Mixer1 and mixer2 tanks are software controlled adjustable (IF1T, IF2T). The demodulator is a peak detector to generate the audio output signal. A separate output is available for AMIF stereo (AMST). 16/42 TDA7512 1.7 1.7.1 PLL and IF Counter Section PLL Frequency Synthesizer Block This part contains a frequency synthesizer and a loop filter for the radio tuning system. Only one VCO is required to build a complete PLL system for FM world tuning and AM upconversion. For auto search stop operation an IF counter system is available. The counter works in a two stages configuration. The first stage is a swallow counter with a two modulus (32/33) precounter. The second stage is an 11-bit programmable counter. The circuit receives the scaling factors for the programmable counters and the values of the reference frequencies via an I2C-Bus interface.The reference frequency is generated by an adjustable internal (XTAL) oscillator followed by the reference divider. The main reference and step-frequencies are free selectable (RC, PC). Output signals of the phase detector are switching the programmable current sources. The loop filter integrates their currents to a DC voltage. The values of the current sources are programmable by 6 bits also received via the I2C Bus (A, B, CURRH, LPF). To minimize the noise induced by the digital part of the system, a special guard configuration is implemented. The loop gain can be set for different conditions by setting the current values of the chargepump generator. 1.7.2 Frequency Generation for Phase Comparison The RF signals applies a two modulus counter (32/33) pre-scaler, which is controlled by a 5-bit A-divider. The 5-bit register (PC0 to PC4) controls this divider. In parallel the output of the prescaler connects to an 11-bit Bdivider. The 11-bit PC register (PC5 to PC15) controls this divider Dividing range: fVCO = [33 x A + (B + 1 - A) x 32] x fREF fVCO = (32 x B + A + 32) x fREF Important: For correct operation: A ≤ 32; B ≥ A 1.7.3 Three State Phase Comparator The phase comparator generates a phase error signal according to phase difference between fSYN and fREF. This phase error signal drives the charge pump current generator. 1.7.4 Charge Pump Current Generator This system generators signed pulses of current. The phase error signal decides the duration and polarity of those pulses. The current absolute values are programmable by A register for high current and B register for low current. 1.7.5 Inlock Detector Switching the chargepump in low current mode can be done either via software or automatically by the inlock detector, by setting bit LDENA to "1". After reaching a phase difference about lower than 40nsec the chargepump is forced in low current mode. A new PLL divider alternation by I2C-Bus will switch the chargepump in the high current mode. 1.7.6 Low Noise CMOS Op-amp An internal voltage divider at pin VREF2 connects the positive input of the low noise op-amp. The charge pump output connects the negative input. This internal amplifier in cooperation with external components can provide an active filter. The negative input is switchable to three input pins, to increase the flexibility in application. This feature allows two separate active filters for different applications. While the high current mode is activated LPHC output is switched on. 1.7.7 IF Counter Block The aim of IF counter is to measure the intermediate frequency of the tuner for AM and FM mode. The input signal for FM and AM upconversion is the same 10.7MHz IF level after limiter. AM 450KHz signal is coming from 17/42 TDA7512 narrow filtered IF2 before demodulation. A switch controlled by IF counter mode (IFCM) is chosing the input signal for IF counter. The grade of integration is adjustable by eight different measuring cycle times. The tolerance of the accepted count value is adjustable, to reach an optimum compromise for search speed and precision of the evaluation. 1.7.8 The IF-Counter Mode The IF counter works in 3 modes controlled by IFCM register. 1.7.9 Sampling Timer A sampling timer generates the gate signal for the main counter. The basically sampling time are in FM mode 6.25kHz (tTIM=160µs) and in AM mode 1kHz (tTIM=1ms). This is followed by an asynchronous divider to generate several sampling times. 1.7.10 Intermediate Frequency Main Counter This counter is a 11 - 21-bit synchronous autoreload down counter. Five bits (CF) are programmable to have the possibility for an adjust to the centre frequency of the IF-filter. The counter length is automatic adjusted to the chosen sampling time and the counter mode (FM, AM-UPC, AM). At the start the counter will be loaded with a defined value which is an equivalent to the divider value (tSample x fIF). If a correct frequency is applied to the IF counter frequency input at the end of the sampling time the main counter is changing its state from 0h to 1FFFFFh. This is detected by a control logic and an external search stop output is changing from LOW to HIGH. The frequency range inside which a successful count result is adjustable by the EW bits. tCNT = (CF + 1696+1) / fIF tCNT = (CF + 10688+1) / fIF tCNT = (CF + 488+1) / fIF FM mode AM up conversion mode AM mode Counter result succeeded: tTIM ≥ tCNT - tERR tTIM ≤ tCNT + tERR Counter result failed: tTIM > tCNT + tERR tTIM < tCNT - tERR tTIM = IF timer cycle time (sampling time) tCNT = IF counter cycle time tERR = discrimination window (controlled by the EW registers) The IF counter is only started by inlock information from the PLL part. It is enabled by software (IFENA). 1.7.11 Adjustment of the Measurement Sequence Time The precision of the measurements is adjustable by controlling the discrimination window. This is adjustable by programming the control registers EW. The measurement time per cycle is adjustable by setting the registers IFS. 1.7.12 Adjust of the Frequency Value The center frequency of the discrimination window is adjustable by the control registers CF. 18/42 TDA7512 1.8 I2C-Bus Interface The TDA7512 supports the I2C-Bus protocol. This protocol defines any device that sends 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. 1.8.1 Data Transition Data transition on the SDA line must only occur when the clock SCL is LOW. SDA transitions while SCL is HIGH will be interpreted as START or STOP condition. 1.8.2 Start Condition A start condition is defined by a HIGH to LOW transition of the SDA line while SCL is at a stable HIGH level. This "START" condition must precede any command and initiate a data transfer onto the bus. The device continuously monitors the SDA and SCL lines for a valid START and will not response to any command if this condition has not been met. 1.8.3 Stop Condition A STOP condition is defined by a LOW to HIGH transition of the SDA while the SCL line is at a stable HIGH level. This condition terminates the communication between the devices and forces the bus-interface of the device into the initial condition. 1.8.4 Acknowledge Indicates a successful data transfer. The transmitter will release the bus after sending 8 bits of data. During the 9th clock cycle the receiver will pull the SDA line to LOW level to indicate it receive the eight bits of data. 1.8.5 Data Transfer During data transfer the device samples the SDA line on the leading edge of the SCL clock. Therefore, for proper device operation the SDA line must be stable during the SCL LOW to HIGH transition. 1.8.6 Device Addressing To start the communication between two devices, the bus master must initiate a start instruction sequence, followed by an eight bit word corresponding to the address of the device it is addressing. The most significant 6 bits of the slave address are the device type identifier. The TDA7512 device type is fixed as "110001". The next significant bit is used to address a particular device of the previous defined type connected to the bus. The state of the hardwired PIN 41 defines the state of this address bit. So up to two devices could be connected on the same bus. When PIN 41 is connected to VCC2 the address bit “1” is selected. In this case the AM part doesn’t work. Otherwise the address bit “0” is selected (FM and AM is working). Therefor a double FM tuner concept is possible. 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 TDA7512 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 TDA7512 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. 1.8.7 Write Operation Following a START condition the master sends a slave address word with the R/W bit set to "0". The device will generate an "acknowledge" after this first transmission and will wait for a second word (the word address field). This 8-bit address field provides an access to any of the 32 internal addresses. Upon receipt of the word address the TDA7512 slave device will respond with an "acknowledge". At this time, all the following words transmitted 19/42 TDA7512 to the TDA7512 will be considered as Data. The internal address will be automatically incremented. After each word receipt the TDA7512 will answer with an "acknowledge". 1.8.8 Read Operation If the master sends a slave address word with the R/W bit set to "1", the TDA7512 will transit one 8-bit data word. This data word includes the following informations: bit0 (ISS filter, 1 = ON, 0 = OFF) bit1 (ISS filter bandwidth, 1 = 80kHz, 0 = 120kHz) bit2 (MPOUT,1 = multipath present, 0 = no multipath) bit3 (1 = PLL is locked in , 0 = PLL is locked out). bit4 (fieldstrength indicator, 1 = lower as softmute threshold, 0 = higher as softmute threshold) bit5 (adjacent channel indicator, 1 = adjacent channel present, 0 = no adjacent channel) bit6 (deviation indicator, 1 = strong overdeviation present, 0 = no strong overdeviation) bit7 (deviation indicator, 1 = overdeviation present, 0 = no overdeviation) 2. Software Specification The interface protocol comprises: – start condition (S) – chip address byte – subaddress byte – sequence of data (N bytes + Acknowledge) – stop condition (P) 20/42 TDA7512 2.1 ADDRESS ORGANIZATION Table 6. Address Organization Function Addr 7 6 5 4 3 2 1 0 CHARGEPUMP 0 LDENA CURRH B1 B0 A3 A2 A1 A0 PLL COUNTER 1 PC7 PC6 PC5 PC4 PC3 PC2 PC1 PC0 2 PC15 PC14 PC13 PC12 PC11 PC10 PC9 PC8 TV1 3 TV1O7 TV1O6 TV1O5 TV1O4 TV1O3 TV1O2 TV1O1 TV1O0 TV2 4 TV2O7 TV2O6 TV2O5 TV2O4 TV2O3 TV2O2 TV2O1 TV2O0 IFC CTRL 1 5 LM CASF IFCM1 IFCM0 IFENA IFS2 IFS1 IFS0 IFC CTRL 2 6 EW2 EW1 EW0 CF4 CF3 CF2 CF1 CF0 AM CTL 7 - - - - AMD1 AMD0 AMST AMSEEK QUALITYISS 8 TISS2 TISS1 TISS0 TVWB ISS30 ISS80 ISSON CTLOFF QUALITY AC 9 ACNTH1 ACNTH0 ACWTH2 ACWTH1 ACWTH0 ACG ACF - QUALITY MP 10 MPAC APPM2 APPM1 MPTH1 MPTH0 MPG MPF MPOFF QUALITYDEV 11 BWCTL DTH1 DTH0 DWTH1 DWTH0 TDEV2 TDEV1 TDEV0 MUTE1 12 MENA SMD3 SMD2 SMD1 SMD0 SMTH2 SMTH1 SMTH0 MUTE2 13 F100K ACM3 ACM2 ACM1 ACM0 ACMD1 ACMD0 SMCTH VCO/PLLREF 14 LPF AMON RC2 RC1 RC0 VCOD2 VCOD1 VCOD0 FMAGC 15 - KAGC2 KAGC1 KAGC0 IFAGC1 IFAGC0 RFAGC1 RFAGC0 AMAGC 16 DAGC3 DAGC2 DAGC1 DAGC0 WAGC3 WAGC2 WAGC1 WAGC0 DEM ADJ 17 DNB1 DNB0 DEM5 DEM4 DEM3 DEM2 DEM1 DEM0 LEVEL 18 ODSW AMIN SMSL SL4 SL3 SL2 SL1 SL0 IF1/XTAL 19 XTAL4 XTAL3 XTAL2 XTAL1 XTAL0 IFG11 IFG10 IFG2 TANK ADJ 20 IF1T3 IF1T2 IF1T1 IF1T0 IF2T3 IF2T2 IF2T1 IF2T0 I/Q ADJ 21 ODCUR - G1 G0 PH3 PH2 PH1 PH0 TESTCTRL1 22 - ISSIN TOUT TIN CLKSEP TEST3 TEST2 TEST1 TESTCTRL2 23 OUT7 OUT6 OUT5 OUT4 OUT3 OUT2 OUT1 OUT0 TESTCTRL3 24 - TINACM TINMP TINAC OUT11 OUT10 OUT9 OUT8 TESTCTRL4 25 - - - OUT16 OUT15 OUT14 OUT13 OUT12 2.2 Control Register Function Table 7. Register Name Function A Charge pump high current ACF Adjacent channel filter select ACG Adjacent channel filter gain ACM Threshold for startpoint adjacent channel mute ACMD Adjacent channel mute depth ACNTH Adjacent channel narrow band threshold ACWTH Adjacent channel wide band threshold AMD AM prescaler AMIN AM IF1 input select AMON AM-FM switch AMSEEK Set short time constant of AGC in AM seek mode 21/42 TDA7512 Table 7. (continued) Register Name Function AMST AM stereo select APPM Application mode quality detection B Charge pump low current BWCTL ISS filter fixed bandwith (ISS80) in automatic control CASF Check alternative station frequency CF Center frequency IF counter CLKSEP Clock separation (only for testing) CTLOFF Switch off automatic control of ISS filter CURRH Set current high charge pump DAGC AM narrow band AGC threshold DEM Demodulator offset DNB Demodulator noise spike blanking DTH Deviation detector threshold for ISS filter “OFF” DWTH Deviation detector threshold for ISS filter narrow/wide EW Frequency error window IF counter F100K Corner frequency of AC-mute high pass filter G I/Q mixer gain adjust IF1T FM/AM mixer1 tank adjust IF2T AM mixer2 tank adjust IFAGC FM IF AGC IFCM IF counter mode IFENA IF counter enable IFG IF1 amplifier gain (10.7MHz) IFS IF counter sampling time ISSIN Test input for ISS filter ISSON ISS filter “ON” ISS30 ISS filter 30KHz weather band ISS80 ISS filter narrow/mid switch KAGC FM keying AGC LDENA Lock detector enable LM Local mode FM seek stop LPF Loop filter input select MENA Softmute enable MPAC Adjacent channel control by multipath MPF Multipath filter frequency MPG Multipath filter gain MPOFF Multipath control “OFF” MPTH Multipath threshold ODCUR Current for overdeviation-correction ODSW Overdeviation-correction enable OUT Test output (only for testing) PC Counter for PLL (VCO frequency) PH I/Q mixer phase adjust 22/42 TDA7512 Table 7. (continued) Register Name Function RC Reference counter PLL RFAGC FM RF AGC SL S meter slider SMCTH Softmute capacitor threshold for ISS “ON” SMD Softmute depth threshold SMSL S meter slope SMTH Softmute startpoint threshold TDEV Time constant for deviation detector TEST Testing PLL/IFC (only for testing) TIN Switch FSU PIN to TEST input (only for testing) TINAC Test input adjacent channel (only for testing) TINACM Test input adjacent channel mute (only for testing) TINMP Test input multipath(only for testing) TISS Time constant for ISS filter “ON”/”OFF” TOUT Switch FSU PIN to Test output (only for testing) TVO Tuning voltage offset for prestage TVWB Tuning voltage offset for prestage (weather band mode) VCOD VCO divider WAGC AM wide band AGC XTAL Xtal frequency adjust 2.2.1 Subaddress Table 8. MSB LSB I Function A4 A3 A2 A1 A0 0 0 0 0 0 Charge pump control 0 0 0 0 1 PLL lock detector - - - - - - 1 0 1 0 1 I/Q ADJ 0 Page mode “OFF” 1 Page mode enable 23/42 TDA7512 2.3 2.3.1 DATA BYTE SPECIFICATION Addr 0 Charge Pump Control Table 9. MSB d7 LSB d6 d5 0 d4 Function d3 d2 d1 d0 0 0 0 0 High current = 0mA 0 0 0 1 High current = 0.5mA 0 0 1 0 High current = 1mA 0 0 1 1 High current = 1.5mA - - - - - 1 1 1 1 High current = 7.5mA Low current = 0µA 0 0 1 Low current = 50µA 1 0 Low current = 100µA 1 1 Low current = 150µA 0 Select low current 1 Select high current 0 Lock detector disable 1 Lock detector enable 2.3.2 Addr 1PLL Counter 1 (LSB) Table 10. MSB LSB Function d7 d6 d5 d4 d3 d2 d1 d0 0 0 0 0 0 0 0 0 LSB = 0 0 0 0 0 0 0 0 1 LSB = 1 0 0 0 0 0 0 1 0 LSB = 2 - - - - - - - - - 1 1 1 1 1 1 0 0 LSB = 252 1 1 1 1 1 1 0 1 LSB = 253 1 1 1 1 1 1 1 0 LSB = 254 1 1 1 1 1 1 1 1 LSB = 255 24/42 TDA7512 2.3.3 Addr 2 PLL Counter 2 (MSB) Table 11. MSB LSB Function d7 d6 d5 d4 d3 d2 d1 d0 0 0 0 0 0 0 0 0 MSB = 0 0 0 0 0 0 0 0 1 MSB = 256 0 0 0 0 0 0 1 0 MSB = 512 - - - - - - - - - 1 1 1 1 1 1 0 0 MSB = 64768 1 1 1 1 1 1 0 1 MSB = 65024 1 1 1 1 1 1 1 0 MSB = 65280 1 1 1 1 1 1 1 1 MSB = 65536 Note: 1. Swallow mode: fVCO/fSYN = LSB + MSB + 32 2.3.4 ddr 3,4 TV1,2 (offset refered to tuning voltage PIN 28) Table 12. MSB d7 - LSB Function d6 d5 d4 d3 d2 d1 d0 0 0 0 0 0 0 0 Tuning Voltage Offset = 0 0 0 0 0 0 0 1 TVO = 25mV 0 0 0 0 0 1 0 TVO = 50mV - - - - - - - - 1 1 1 1 1 1 1 TVO = 3175mV 0 -TVO 1 +TVO 25/42 TDA7512 2.3.5 Addr 5 IF Counter Control 1 Table 13. MSB d7 LSB d6 d5 d4 d3 Function d2 d1 d0 0 0 0 tSample = 20.48ms (FM)128ms (AM ) 0 0 1 tSample = 10.24ms (FM)64ms (AM ) 0 1 0 tSample = 5.12ms (FM)32ms (AM ) 0 1 1 tSample = 2.56ms (FM)16ms (AM ) 1 0 0 tSample = 1.28ms (FM)8ms (AM ) 1 0 1 tSample = 640µs (FM)4ms (AM ) 1 1 0 tSample = 320µs (FM)2ms (AM) 1 1 1 tSample = 160µs (FM)1ms (AM ) 0 IF counter disable / stand by 1 IF counter enable 0 0 Not valid 0 1 IF counter FM mode 1 0 IF counter AM mode (450KHz) 1 1 IF counter AM mode (10.7MHz) 0 Disable mute & AGC on hold in FM mode 1 Enable mute & AGC on hold in FM mode 0 Disable local mode 1 Enable local mode (PIN diode current = 0.5mA) “ON” 2.3.6 Addr 6 IF Counter Control 2 Table 14. MSB d7 d6 d5 - - - - - - 0 0 0 0 1 1 1 0 0 1 1 0 0 1 0 1 0 1 0 1 0 1 1 1 26/42 LSB Function d0 0 fCenter = 10.60625MHz (FM) / 10.689MHz ; 449KHz (AM) d4 0 d3 0 d2 0 d1 0 0 0 0 0 1 fCenter = 10.61250MHz (FM) / 10.690MHz ; 450KHz (AM) 0 1 0 1 1 fCenter = 10.67500MHz (FM) / 10.700MHz ; 460KHz (AM) 0 0 1 1 1 1 0 0 0 1 fCenter = 10.68125MHz (FM) / 10.701MHz ; 461KHz (AM) fCenter = 10.68750MHz (FM) / 10.702MHz ; 462KHz (AM) 0 1 1 1 0 fCenter = 10.69375MHz (FM) / 10.703MHz ; 463KHz (AM) 0 1 1 1 1 1 1 1 1 1 fCenter = 10.70000MHz (FM) / 10.704MHz ; 464KHz(AM) fCenter = 10.80000MHz (FM) / 10.720MHz ;480KHz (AM) Not valid Not valid Not valid ∆f = 6.25kHz (FM)1kHz (AM) ∆f = 12.5kHz (FM) 2kHz (AM) ∆f = 25kHz (FM) 4kHz (AM) ∆f = 50kHz (FM) 8kHz (AM) ∆f = 100kHz (FM)16kHz (AM) TDA7512 2.3.7 Addr 7 AM Control Table 15. MSB d7 2.3.8 LSB d6 d5 d4 d3 d2 d1 Function d0 0 Normal AGC time constant 1 Short time constant for AM seek stop 0 Multipath information available FM at PIN 34 1 AM stereo output available at PIN 34 0 0 Prescaler ratio 10 0 1 Prescaler ratio 8 1 0 Prescaler ratio 6 1 1 Prescaler ratio 4 Addr 8 Quality ISS Filter Table 16. MSB d7 LSB d6 d5 d4 d3 d2 d1 Function d0 0 ISS filter control “ON” 1 ISS filter control “OFF” 0 Switch ISS filter “OFF” 1 Switch ISS filter “ON” 0 Switch “OFF” ISS filter 120kHz 1 Switch “ON” ISS filter 80kHz 0 Switch “OFF” ISS filter 30KHz for weatherband 1 Switch “ON” ISS filter 30KHz for weatherband 0 Disable TV offset for weather band 1 Enable TV offset for weather band (+4V) 0 0 0 discharge current1µA, charge current mid 74µΑ narrow124µΑ 0 0 1 discharge current3µA, charge current mid 72µΑ narrow122µΑ 0 1 0 discharge current5µA, charge current mid 70µΑ narrow120µΑ 0 1 1 discharge current7µA, charge current mid 68µΑ narrow118µΑ - - - - 1 1 1 discharge current15µA,charge current mid 60µΑnarrow110µΑ 27/42 TDA7512 2.3.9 Addr 9 Quality Detection Adjacent Channel Table 17. MSB d7 LSB d6 d5 d4 d3 d2 d1 Function d0 0/1 Not valid 0 AC highpass frequency 100kHz 1 AC bandpass frequency 100kHz 0 AC gain 32dB 1 AC gain 38dB 0 0 0 AC wide band threshold 0.25V 0 0 1 AC wide band threshold 0.35V 0 1 0 AC wide band threshold 0.45V - - - - 1 1 1 AC wide band threshold 0.95V 0 0 AC narrow band threshold 0.0V 0 1 AC narrow band threshold 0.1V 1 0 AC narrow band threshold 0.2V 1 1 AC narrow band threshold 0.3V 2.3.10 Addr 10 Quality Detection Multipath Table 18. MSB d7 LSB d6 d5 d4 d3 d2 0 1 d1 Function d0 0 Multipath control “ON” 1 Multipath control “OFF” 0 MP bandpass frequency 19KHz 1 MP bandpass frequency 31KHz MP gain 12dB MP gain 23dB 0 0 MP threshold 0.50V 0 1 MP threshold 0.75V 1 0 MP threshold 1.00V 1 1 MP threshold 1.25V 0 0 Application mode 1 0 1 Application mode 2 0 Multipath eliminates ac 1 Multipath eliminates ac and ac+ 28/42 TDA7512 2.3.11 Addr 11 Quality Deviation Detection Table 19. MSB d7 LSB d6 d5 d4 d3 Function d2 d1 d0 0 0 0 charge current 34µΑ, discharge current 6µΑ 0 0 1 charge current 32µΑ, discharge current 8µΑ 0 1 0 charge current 30µΑ, discharge current 10µΑ 0 1 1 charge current 28µΑ, discharge current 12µΑ - - - - 1 1 1 charge current 20µΑ, discharge current 20µΑ 0 0 DEV threshold for ISS narrow/wide 30kHz 0 1 DEV threshold for ISS narrow/wide 45kHz 1 0 DEV threshold for ISS narrow/wide 60kHz 1 1 DEV threshold for ISS narrow/wide 75kHz 0 0 DEV threshold for ISS filter “OFF” ratio 1.5 0 1 DEV threshold for ISS filter “OFF” ratio 1.4 1 0 DEV threshold for ISS filter “OFF” ratio 1.3 1 1 DEV threshold for ISS filter “OFF” ratio 1 0 Disable ISS filter to fixed bandwith (ISS80) in automatic control 1 Enable ISS filter to fixed bandwith (ISS80) in automatic control 2.3.12 Addr 12 Softmute Control 1 Table 20. MSB d7 LSB d6 d5 d4 d3 Function d2 d1 d0 0 0 0 Startpoint mute 0 in application about 3dBµV antenna level 0 0 1 Startpoint mute 1in application about 4dBµV antenna level - - - - 1 1 1 Startpoint mute 7in application about 10dBµV antenna level 0 0 0 0 Mute depth 0 in application 18dB 0 0 0 1 Mute depth 1 in application 20dB 0 0 1 0 Mute depth 2 in application 22dB 0 0 1 1 Mute depth 3 in application 24dB - - - - - (logarithmically behaviour) 1 1 1 1 Mute depth 15 in application 36dB 0 Mute disable 1 Mute enable 29/42 TDA7512 2.3.13 Addr 13 Softmute Control 2 Table 21. MSB d7 LSB d6 d5 d4 d3 d2 d1 Function d0 0 Disable mute threshold for ISS filter “ON” 1 Enable mute threshold for ISS filter “ON” 0 0 AC mute depth 10dB 0 1 AC mute depth 8dB 1 0 AC mute depth 6dB 1 1 AC mute depth 4dB 0 0 0 0 AC mute threshold 60mV 0 0 0 1 AC mute threshold 80mV 0 0 1 0 AC mute threshold 100mV - - - - - 0 1 1 1 AC mute threshold 340mV 1 1 1 1 AC mute “OFF” 0 AC mute filter 110KHz 1 AC mute filter 100KHz 2.3.14 Addr 14 VCODIV/PLLREF Table 22. MSB d7 LSB d6 d5 d4 d3 d2 Function d1 d0 0 0 not valid (only for testing) 0 1 VCO frequency divided by 2 1 0 VCO frequency divided by 3 1 1 original VCO frequency 0 VCO” I” signal 0 degree 1 VCO “I” signal 180 degree 1 0 0 PLL reference frequency 50KHz 1 0 1 PLL reference frequency 25KHz 1 1 0 PLL reference frequency 10KHz 1 1 1 PLL reference frequency 9KHz 0 0 0 PLL reference frequency 2KHz 0 Select FM mode 1 Select AM mode 0 Select PLL low pass filter FM 1 Select PLL low pass filter AM 30/42 TDA7512 2.3.15 Addr 15 FM AGC Table 23. MSB d7 0 LSB d6 d5 d4 d3 d2 Function d1 d0 0 0 RFAGC threshold V7-9TH= 85(77 ANT)dBµV 0 1 RFAGC threshold V7-9TH= 90(82 ANT)dBµV 1 0 RFAGC threshold V7-9TH= 94(86 ANT)dBµV 1 1 RFAGC threshold V7-9TH= 96(88 ANT)dBµV 0 0 IFAGC threshold V60TH= 86(60 ANT)dBµV 0 1 IFAGC threshold V60TH= 92(66 ANT)dBµV 1 0 IFAGC threshold V60TH= 96(70 ANT)dBµV 1 1 IFAGC threshold V60TH= 98(72 ANT)dBµV 0 0 0 KAGC threshold 80dBµV 0 0 1 KAGC threshold 82dBµV 0 1 0 KAGC threshold 84dBµV 0 1 1 KAGC threshold 86dBµV 1 0 0 KAGC threshold 88dBµV 1 0 1 KAGC threshold 90dBµV 1 1 0 KAGC threshold 92dBµV 1 1 1 Keying AGC “OFF” has to be “0” 31/42 TDA7512 2.3.16 Addr 16 AM AGC Table 24. MSB d7 LSB d6 d5 d4 Function d3 d2 d1 d0 0 0 0 0 WAGC V3TH= 90(65 ANT)dBµ V58TH= 90(60 ANT)dBµ 0 0 0 1 WAGC V3TH= 94(69 ANT)dBµ V58TH= 94(64 ANT)dBµ 0 0 1 0 WAGC V3TH= 97(72 ANT)dBµ V58TH= 96,5(66,5 ANT)dBµ 0 0 1 1 WAGC V3TH= 98,5(73,5 ANT)dBµ V58TH= 98,5(68,5 ANT)dBµ 0 1 0 0 WAGC V3TH= 100(75 ANT)dBµ V58TH= 100(70 ANT)dBµ 0 1 0 1 WAGC V3TH= 101,5(76,5 ANT)dBµ V58TH= 101(71 ANT)dBµ 0 1 1 0 WAGC V3TH= 102,5(77,5 ANT)dBµV58TH= 102,5(72,5 ANT)dBµ 0 1 1 1 WAGC V3TH= 103,5(78,5 ANT)dBµV58TH= 103,5(73,5 ANT)dBµ 1 0 0 0 WAGC V3TH= 104,5(79,5 ANT)dBµ V58TH= 104(74 ANT)dBµ 1 0 0 1 WAGC V3TH= 105(80 ANT)dBµ V58TH= 105(75 ANT)dBµ 1 0 1 0 WAGC V3TH= 106(81 ANT)dBµ V58TH= 105,5(75,5 ANT)dBµ 1 0 1 1 WAGC V3TH= 106,5(81,5 ANT)dBµV58TH= 106,5(76,5 ANT)dBµ 1 1 0 0 WAGC V3TH= 107(82 ANT)dBµ V58TH= 107(77 ANT)dBµ 1 1 0 1 WAGC V3TH= 108(83 ANT)dBµ V58TH= 107,5(77,5 ANT)dBµ 1 1 1 0 WAGC V3TH= 108,5(83,5 ANT)dBµ V58TH= 108(78 ANT)dBµ 1 1 1 1 WAGC V3TH= 109(84 ANT)dBµ V58TH= 108,5(78,5 ANT)dBµ 0 0 0 0 DAGC V58TH= 74(44 ANTENNA)dBµ 0 0 0 1 DAGC V58TH= 77(47 ANTENNA)dBµ 0 0 1 0 DAGC V58TH= 79(49 ANTENNA)dBµ 0 0 1 1 DAGC V58TH= 80,5(50,5 ANTENNA)dBµ 0 1 0 0 DAGC V58TH= 82(52 ANTENNA)dBµ 0 1 0 1 DAGC V58TH= 83,5(53,5 ANTENNA)dBµ 0 1 1 0 DAGC V58TH= 85(55 ANTENNA)dBµ 0 1 1 1 DAGC V58TH= 86,5(56,5 ANTENNA)dBµ 1 0 0 0 DAGC V58TH= 88(58 ANTENNA)dBµ 1 0 0 1 DAGC V58TH= 89(59 ANTENNA)dBµ 1 0 1 0 DAGC V58TH= 90(60 ANTENNA)dBµ 1 0 1 1 DAGC V58TH= 91(61 ANTENNA)dBµ 1 1 0 0 DAGC V58TH= 92(62 ANTENNA)dBµ 1 1 0 1 DAGC V58TH= 93(63 ANTENNA)dBµ 1 1 1 0 DAGC V58TH= 94(64 ANTENNA)dBµ 1 1 1 1 DAGC V58TH= 96(66 ANTENNA)dBµ 32/42 TDA7512 2.3.17 Addr 17 FM Demodulator Fine Adjust Table 25. MSB d7 LSB d6 Function d5 d4 d3 d2 d1 d0 0 0 0 0 0 0 0mV 0 0 0 0 0 1 +8.5mV 0 0 0 0 1 0 +17mV - - - - - - - 0 1 1 1 1 1 +263.5mV 1 0 0 0 0 0 0mV 1 0 0 0 0 1 -8.5mV 1 0 0 0 1 0 -17mV - - - - - - - 1 1 1 1 1 1 -263.5mV 0 0 Spike cancelation ”OFF” 0 1 Threshold for spike cancelation 270mV 1 0 Threshold for spike cancelation 520mV 1 1 Threshold for spike cancelation 750mV 2.3.18 Addr 18 S-Meter Slider Table 26. MSB d7 LSB d6 d5 d4 0 1 0 1 Function d3 d2 d1 d0 0 0 0 0 S meter slider offset SL=0dB 0 0 0 1 S meter offset SL=1dB 0 0 1 0 S meter offset SL=2dB - - - - - 1 1 1 1 S meter offset SL=15dB S meter offset -SL S meter offset +SL S Meter slope 1V/decade S meter slope 1.5V/decade 0 Select external AM-IF input 1 Select internal AM-IF input 0 Overdeviation correction “ON” 1 Overdeviation correction “OFF” 33/42 TDA7512 2.3.19 Addr 19 IF GAIN/XTAL Adjust Table 27. MSB d7 LSB d6 d5 d4 d3 d2 d1 Function d0 0 IF1 gain2 9dB 1 IF1 gain2 11dB 0 0 IF1 gain1 9dB 0 1 IF1 gain1 11dB 1 0 IF1 gain1 12dB 1 1 IF1 gain1 15dB 0 0 0 0 0 CLoad 0pF 0 0 0 0 1 CLoad 0.75pF 0 0 0 1 0 CLoad 1.5pF 0 0 0 1 1 CLoad 2.25pF 0 0 1 0 0 CLoad 3pF - - - - - - 1 1 1 1 1 CLoad 23.25pF 2.3.20 Addr 20 Tank Adjust Table 28. MSB d7 LSB d6 d5 d4 Function d3 d2 d1 d0 0 0 0 0 450kHz 0pF 0 0 0 1 450kHz 1.6pF 0 0 1 0 450kHz 3.2pF 0 0 1 1 450kHz 4.8pF - - - - - 1 1 1 1 450kHz 24pF 0 0 0 0 10.7MHz 0pF 0 0 0 1 10.7MHz 0.55pF 0 0 1 0 10.7MHz 1.1pF 0 0 1 1 10.7MHz 1.65pF - - - - - 1 1 1 1 10.7MHz 8.25pF 34/42 TDA7512 2.3.21 Addr 21 I/Q FM mixer1 adjust Table 29. MSB d7 LSB d6 d5 d4 Function d3 d2 d1 d0 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 1 +8degree 0 0 0 1 0% -1% 1 0 +1% 1 1 0% x not used 0 Overdeviation correction current max=45µA 1 Overdeviation correction current max=90µA 2.3.22 Addr 22 Test Control 1 Table 30. MSB LSB d7 d6 d5 d4 d3 d2 d1 d0 x x x x x x x x Function Only for testing ( have to be set to 0) 2.3.23 Addr 23 Test Control 2 Table 31. MSB LSB d7 d6 d5 d4 d3 d2 d1 d0 x x x x x x x x d2 x d1 x Function Only for testing ( have to be set to 0) 2.3.24 Addr 24 Test Control 3 Table 32. MSB d7 x LSB d6 x d5 x d4 x d3 x d0 x Function Only for testing ( have to be set to 0) 2.3.25 Addr25 Test Control 4 Table 33. MSB LSB d7 d6 d5 d4 d3 d2 d1 d0 x x x x x x x x Function Only for testing ( have to be set to 0) 35/42 TDA7512 3. APPENDIX Figure 1. Block diagram I/Q mixer Figure 2. Block diagram VCO 36/42 TDA7512 Figure 3. Block diagram keying AGC 5.7V Figure 4. Block diagram ISS function 37/42 TDA7512 Block Diagram Quality Detection Principle (without overdeviation correction) Table 34. Signal LOW HIGH ac No adjacent channel Adjacent channel present ac+ No strong adjacent channel Adjacent channel higher as ac sm Fieldstrength higher as softmute threshold Fieldstrength lower as softmute threshold dev Deviation lower as threshold DWTH Deviation higher as threshold DWTH dev+ Deviation lower as threshold DTH*DWTH Deviation higher as threshold DTH*DWTH inton ISS filter off by logic (wide) ISS filter on by logic int80 ISS filter 120kHz (mid) ISS filter 80kHz (narrow) Table 35. Input Signals Mode1 Mode2 ac ac+ sm dev dev+ inton int80 Function inton int80 Function 0 0 0 0 0 0 0 wide 0 0 wide 0 0 0 1 0 0 0 wide 0 0 wide 0 0 0 1 1 0 0 wide 0 0 wide 0 0 1 0 0 1 1 narrow 1 1 narrow 0 0 1 1 0 0 0 wide 1 0 mid 0 0 1 1 1 0 0 wide 0 0 wide 1 0 0 0 0 1 1 narrow 1 0 mid 1 1 0 0 0 1 1 narrow 1 1 narrow 1 0 0 1 0 1 0 mid 1 0 mid 1 1 0 1 1 1 0 mid 1 1 narrow 1 0 1 0 0 1 1 narrow 1 1 narrow 1 1 1 0 0 1 1 narrow 1 1 narrow 1 0 1 1 0 1 0 mid 1 0 mid 1 1 1 1 0 1 0 mid 1 1 narrow 1 0 1 1 1 1 0 mid 1 0 mid 1 1 1 1 1 1 0 mid 1 1 narrow Part List (Application- and Measurment Circuit) Table 36. Item Description F1 TOKO 5KG 611SNS-A096GO F2 TOKO 5KM 396INS-A467AO F3 TOKO MC152 E558HNA-100092 F4 TOKO 7PSG 826AC-A0022EK=S F5 TOKO PGL 5PGLC-5103N L1 TOKO FSLM 2520-150 15µH L2,L4 TOKO FSLM 2520-680 68µH L3,L8 SIEMENS SIMID03 B82432 1mH L5 TOKO LL 2012-220 38/42 TDA7512 Table 36. (continued) Item Description L6 TOKO LL 2012-270 L7 TOKO LL 2012-22.0 CF1,CF2 muRata SFE10.7MS3A10-A 180KHz or (TOKO CFSK107M3-AE-20X) CF3 muRata SFE10.7MJA10-A 150KHz or (TOKO CFSK107M4-AE-20X) CF4 muRata SFPS 450H 6KHz or (TOKO ARLFC450T) D1 TOSHIBA 1SV172 D2,D3 TOKO KP2311E D4 TOKO KV1370NT D5 PHILIPS BB156 Q1 TOSHIBA HN3G01J Figure 5. 39/42 TDA7512 4.0 Application notes Following items are important to get highest performance of TDA7512 in application: 1. In order to avoid leakage current from PLL loop filter input to ground a guardring is recommended around loop filter PIN’s with PLL reference voltage potential. 2. Distance between Xtal and VCO input PIN 18 should be far as possible and Xtal package should get a shield versus ground. 3. Blocking of VCO supply should be near at PIN 16 and PIN 17. 4. Wire lenght to FM mixer1 input and output should be symetrically and short. 5. FM demodulator capacitance at PIN 44 should be sense connected as short as possible versus demodulator ground at PIN 47. 6. With respect to THD capacitive coupling from PIN 20 to VCO should be avoided. Capacitance at PIN 20 has be connected versus VCC2 ground. 7. Wire lenght from AM mixer tank output to 9KHz ceramic filter input has to be short as possible. 40/42 TDA7512 mm DIM. MIN. inch TYP. MAX. A MIN. TYP. 1.60 A1 0.05 A2 1.35 B C 0.063 0.15 0.002 0.006 1.40 1.45 0.053 0.055 0.057 0.18 0.23 0.28 0.007 0.009 0.011 0.12 0.16 0.20 0.0047 0.0063 0.0079 D 12.00 0.472 D1 10.00 0.394 D3 7.50 0.295 e 0.50 0.0197 E 12.00 0.472 E1 10.00 0.394 E3 7.50 0.295 L 0.40 0.60 L1 0.75 OUTLINE AND MECHANICAL DATA MAX. 0.0157 0.0236 0.0295 1.00 0.0393 TQFP64 0°(min.), 7°(max.) K D D1 A D3 A2 A1 48 33 49 32 0.10mm E E1 E3 B B Seating Plane 17 64 1 16 C L L1 e K TQFP64 41/42 TDA7512 Information furnished is believed to be accurate and reliable. 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