TDA7512 STMicroelectronics, TDA7512 Datasheet

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TDA7512

Manufacturer Part Number
TDA7512
Description
Manufacturer
STMicroelectronics
Datasheet

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FM-PART
AM-PART
ADDITIONAL FEATURES
September 2003
This is preliminary information on a new product now in development or undergoing evaluation. Details are subject to change without notice.
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
MIXER FOR 2
INTERNAL 450KHz BANDPASS FILTER WITH
THREE BANDWIDTHS CONTROLLED BY ISS
FULLY INTEGRATED FM-DEMODULATOR
WITH NOISE CANCELLATION
WIDE AND NARROW AGC GENERATION
PREAMPLIFIER AND MIXER FOR 1ST IF
10.7MHz, AM UPCONVERSION
MIXER FOR 2
INTEGRATED AM-DEMODULATOR
OUTPUT FOR AM-STEREO-DECODER
VCO FOR WORLD TUNING RANGE
HIGH PERFORMANCE FAST PLL FOR RDS-
SYSTEM
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
nd
nd
AM/FM CAR RADIO TUNER IC WITH INTELLIGENT
IF 450KHz
IF 450KHz
DESCRIPTION
The TDA7512 is a high performance tuner circuit for
AM/FM car radio. It contains mixer, IF amplifier, de-
modulator for AM and FM, quality detection, ISS filter
and PLL synthesizer with IF counter on a single chip.
Use of BICMOS technology allows the implementa-
tion of several tuning functions and a minimum of ex-
ternal components.
SELECTIVITY SYSTEM (ISS)
ISS (INTELLIGENT SELECTIVITY SYSTEM)
FOR CANCELLATION OF ADJACENT
CHANNEL AND NOISE INFLUENCES
ADJACENT CHANNEL MUTE
FULLY ELECTRONIC ALIGNMENT
ALL FUNCTIONS I
ISS FILTER STATUS INFORMATION I
READABLE
ORDERING NUMBER: TDA7512
TQFP64
2
C-BUS CONTROLLED
PRELIMINARY DATA
TDA7512
2
C-BUS
1/42

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TDA7512 Summary of contents

Page 1

... C-BUS CONTROLLED ISS FILTER STATUS INFORMATION I READABLE DESCRIPTION The TDA7512 is a high performance tuner circuit for AM/FM car radio. It contains mixer, IF amplifier, de- modulator for AM and FM, quality detection, ISS filter and PLL synthesizer with IF counter on a single chip. Use of BICMOS technology allows the implementa- tion of several tuning functions and a minimum of ex- ternal components ...

Page 2

... TDA7512 BLOCK DIAGRAM 2/42 ...

Page 3

... VREF1 47 GNDDEM 46 FMMIX2IN1 45 FMMIX2IN2 44 REFDEMC FM/AM 43 AMIF2IN 42 MUTETC 41 AMDETC 40 AMAGC2TC 39 AMIFBPF 38 AMIFREF 37 MPX/AFAM 36 VCC1 35 FSW 34 AMST/MP 33 GNDVCC1 TQFP64 Function TDA7512 3/42 ...

Page 4

... TDA7512 PIN DESCRIPTION (continued) N° Pin Name 14 FSU Unweighted Fieldstrength Output 15 ISSTC Time Constant for ISS Filter Switch 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 ...

Page 5

... MIX Tank 10.7MHz THERMAL DATA Table 1. Symbol R Thermal resistance junction to ambient th(j-a) ABSOLUTE MAXIMUM RATINGS Table 2. Symbol V Supply Voltage S T Ambient Temperature amb T Storage Temperature stg Function Parameter Parameter TDA7512 Value Unit 68 max. °C/W Value Unit 10 °C -55 to +150 °C 5/42 ...

Page 6

... TDA7512 Table 3. ELECTRICAL CHARACTERISTICS T = +25° amb CC1 CC2 f = 1kHz 10.7MHz, f MOD IF1 specified. Symbol Parameter Supply V Digital supply voltage CC1 V Analog supply voltage CC2 V Analog tuning voltage CC3 V VCO supply voltage CCVCO V MIX1 supply voltage CCMIX1 V MIX2 supply voltage ...

Page 7

... RF Min. Typ. Max. 98 RMS, 3.6 RMS 2 -12.5 = 2.5V 1. 2.5V - 100 3 100 122 - TDA7512 Unit REF1 BE 0 DEG dB dB 7/42 ...

Page 8

... TDA7512 Table 3. ELECTRICAL CHARACTERISTICS (continued +25° amb CC1 CC2 f = 1kHz 10.7MHz, f MOD IF1 specified. Symbol Parameter IF1 Amplifier1 +2 (10.7MHz) G Min. gain min G Max. gain max R Input resistance IN R Output resistance OUT CP 1dB compression point 1dB IIP3 3rd order Intermodulation ...

Page 9

... RMS RMS ACG=0 ACG=1 ACF=0 ACF=1 MPG=0 MPG=1 MPF=0 MPF=1 =8.5V 98MHz, dev. = 40kHz, RF Min. Typ. Max. -15 15 200 0 2.5 4 100 100 70 0.1 4 0.1 4.9 2.5 TDA7512 Unit dB ppm kHz kHz kHz kHz kHz 9/42 ...

Page 10

... TDA7512 Table 3. ELECTRICAL CHARACTERISTICS (continued +25° amb CC1 CC2 f = 1kHz 10.7MHz, f MOD IF1 specified. Symbol Parameter ISS (intelligent Selectivity System) Filter 450kHz f Centre frequency centre BW 3dB Bandwidth, -3dB BW Bandwidth, -20dB 20dB BW 3dB Bandwidth, -3dB BW Bandwidth, -20dB 20dB BW 3dB Bandwidth weather band ...

Page 11

... ACM ACMD V = 60dB V, ANT_min dev.= 40kHz,LP=15KHz deemphasis =8.5V 98MHz, dev. = 40kHz, RF Min. Typ. Max. 4 - Upper 36 Upper 0.2 60 340 4 10 -47.5 2.5 66 TDA7512 Unit kHz kHz 11/42 ...

Page 12

... TDA7512 Table 4. ELECTRICAL CHARACTERISTICS T = +25° amb CC1 CC2 30% AMf = 10.7MHz 450kHz, f IF1 IF2 V antenna input). INRF Symbol Parameter Global V Max. sensitivity ANT min V us Usable sensitivity ANT IF2 AGC Range V ANT (S+N)/N Signal to Noise Ratio a IF rejection IF f Frequency response ...

Page 13

... Test Condition differential differential differential referred to diff. mixer input IF1T IF1T IF1T referred to diff. mixer input Mixer2 tank output IF2T IF2T IF2T TDA7512 = 8.5V 1MHz 400Hz at RF MOD Min. Typ. Max. 1.2 4 100 115 132 8 26 ...

Page 14

... TDA7512 Table 5. ADDITIONAL PARAMETERS Symbol Parameter Output of Tuning Voltages (TV1,TV2) V Output voltage OUT R Output impedance OUT Xtal Reference Oscillator f Reference frequency LO C Min. cap step Step C Max. cap max f/f Deviation versus VCC2 Deviation versus temp f C-Bus interface f Clock frequency SCL ...

Page 15

... 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 I (MPOFF). The multipath information is available as analog output signal after rectifier and +8dB output buffer Bus. This level produces digital signals (ac, ac TDA7512 2 C Bus 15/42 ...

Page 16

... 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 ...

Page 17

... 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 REF 32 C-Bus will switch the chargepump in the high current mode. TDA7512 2 C Bus (A, B, CURRH, LPF). and f . SYN REF ...

Page 18

... TDA7512 narrow filtered IF2 before demodulation. A switch controlled by IF counter mode (IFCM) is chosing the input sig- nal 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. ...

Page 19

... 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 TDA7512 ...

Page 20

... 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 ON OFF) ...

Page 21

... XTAL0 IFG11 IFG10 IF2T3 IF2T2 IF2T1 PH3 PH2 PH1 CLKSEP TEST3 TEST2 OUT3 OUT2 OUT1 OUT11 OUT10 OUT9 OUT15 OUT14 OUT13 TDA7512 0 A0 PC0 PC8 TV1O0 TV2O0 IFS0 CF0 AMSEEK CTLOFF - MPOFF TDEV0 SMTH0 SMCTH VCOD0 RFAGC0 WAGC0 DEM0 SL0 IFG2 ...

Page 22

... TDA7512 Table 7. (continued) Register Name 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 ...

Page 23

... VCO divider WAGC AM wide band AGC XTAL Xtal frequency adjust 2.2.1 Subaddress Table 8. MSB Function LSB Charge pump control PLL lock detector - - - - I/Q ADJ Page mode “OFF” Page mode enable TDA7512 Function 23/42 ...

Page 24

... TDA7512 2.3 DATA BYTE SPECIFICATION 2.3.1 Addr 0 Charge Pump Control Table 9. MSB 2.3.2 Addr 1PLL Counter 1 (LSB) Table 10. MSB ...

Page 25

... MSB = MSB = 256 MSB = 512 - - - - MSB = 64768 MSB = 65024 MSB = 65280 MSB = 65536 LSB Tuning Voltage Offset = TVO = 25mV TVO = 50mV - - - - TVO = 3175mV -TVO +TVO TDA7512 Function Function 25/42 ...

Page 26

... TDA7512 2.3.5 Addr 5 IF Counter Control 1 Table 13. MSB 2.3.6 Addr 6 IF Counter Control 2 Table 14. MSB ...

Page 27

... Disable TV offset for weather band Enable TV offset for weather band (+4V) discharge current1 A, charge current mid 74 discharge current3 A, charge current mid 72 discharge current5 A, charge current mid 70 discharge current7 A, charge current mid 68 - discharge current15 A,charge current mid 60 TDA7512 Function Function narrow124 narrow122 narrow120 narrow118 narrow110 ...

Page 28

... TDA7512 2.3.9 Addr 9 Quality Detection Adjacent Channel Table 17. MSB 2.3.10 Addr 10 Quality Detection Multipath Table 18. MSB 28/42 LSB 0/1 Not valid 0 AC highpass frequency 100kHz ...

Page 29

... Mute depth 0 in application 18dB Mute depth 1 in application 20dB Mute depth 2 in application 22dB Mute depth 3 in application 24dB - (logarithmically behaviour) Mute depth 15 in application 36dB Mute disable Mute enable TDA7512 Function discharge current 6 discharge current 8 discharge current 10 discharge current 12 discharge current 20 Function ...

Page 30

... TDA7512 2.3.13 Addr 13 Softmute Control 2 Table 21. MSB 2.3.14 Addr 14 VCODIV/PLLREF Table 22. MSB 30/42 LSB Disable mute threshold for ISS filter “ON” ...

Page 31

... IFAGC threshold V KAGC threshold 80dB V KAGC threshold 82dB V KAGC threshold 84dB V KAGC threshold 86dB V KAGC threshold 88dB V KAGC threshold 90dB V KAGC threshold 92dB V Keying AGC “OFF” has to be “0” TDA7512 Function = 85(77 ANT)dB V 7-9TH = 90(82 ANT)dB V 7-9TH = 94(86 ANT)dB V 7-9TH = 96(88 ANT)dB V 7-9TH ...

Page 32

... TDA7512 2.3.16 Addr 16 AM AGC Table 24. MSB ...

Page 33

... S meter offset SL=1dB meter offset SL=2dB - - - - meter offset SL=15dB S meter offset -SL S meter offset +SL S Meter slope 1V/decade S meter slope 1.5V/decade Select external AM-IF input Select internal AM-IF input Overdeviation correction “ON” Overdeviation correction “OFF” TDA7512 Function Function 33/42 ...

Page 34

... TDA7512 2.3.19 Addr 19 IF GAIN/XTAL Adjust Table 27. MSB 2.3.20 Addr 20 Tank Adjust Table 28. MSB ...

Page 35

... Only for testing ( have to be set to 0) LSB Only for testing ( have to be set to 0) LSB Only for testing ( have to be set to 0) LSB Only for testing ( have to be set to 0) TDA7512 Function Function Function Function Function 35/42 ...

Page 36

... TDA7512 3. APPENDIX Figure 1. Block diagram I/Q mixer Figure 2. Block diagram VCO 36/42 ...

Page 37

... Figure 3. Block diagram keying AGC Figure 4. Block diagram ISS function 5.7V TDA7512 37/42 ...

Page 38

... TDA7512 Block Diagram Quality Detection Principle (without overdeviation correction) Table 34. Signal LOW ac No adjacent channel ac+ No strong adjacent channel sm Fieldstrength higher as softmute threshold dev Deviation lower as threshold DWTH dev+ Deviation lower as threshold DTH*DWTH inton ISS filter off by logic (wide) int80 ISS filter 120kHz (mid) Table 35 ...

Page 39

... 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. TDA7512 39/42 ...

Page 40

... TDA7512 4.0 Application notes Following items are important to get highest performance of TDA7512 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 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 ...

Page 41

... E3 7.50 L 0.40 0.60 0.75 0.0157 0.0236 0.0295 L1 1.00 K (min.), 7 (max inch TYP. MAX. MECHANICAL DATA 0.063 0.006 0.055 0.057 0.009 0.011 0.472 0.394 0.295 0.0197 0.472 0.394 0.295 0.0393 TQFP64 TDA7512 OUTLINE AND TQFP64 0.10mm Seating Plane C K 41/42 ...

Page 42

... TDA7512 Information furnished is believed to be accurate and reliable. However, STMicroelectronics assumes no responsibility for the consequences of use of such information nor for any infringement of patents or other rights of third parties which may result from its use. No license is granted by implication or otherwise under any patent or patent rights of STMicroelectronics. Specifications mentioned in this publication are subject to change without notice ...

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