TDA7705 STMicroelectronics, TDA7705 Datasheet
TDA7705
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TDA7705 Summary of contents
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... I C/SPI bus controlled ■ Single 5 V supply ■ LQFP64 package Description The TDA7705 highly integrated tuner (HIT new generation of high performance tuners for carradio applications. Table 1. Device summary Order code TDA7705 TDA7705TR March 2010 Highly integrated tuner for AM/FM car radio ...
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... Absolute maximum ratings . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 16 3.2 Thermal data . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 16 3.3 General key parameters . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 16 3.4 Electrical characteristics . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 17 3.4.1 3.4.2 3.4.3 3.4.4 3.4.5 2/42 Serial interface choice / boot mode . . . . . . . . . . . . . . . . . . . . . . . . . . . . bus protocol . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 13 SPI bus protocol . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . section . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . section . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 18 VCO . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 19 Phase locked loop . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 19 Tuning DAC . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 19 Doc ID 15938 Rev 8 TDA7705 ...
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... TDA7705 3.4.6 3.4.7 3.4.8 3.4.9 3.4.10 3.4.11 3.5 Overall system performance . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 23 3.5.1 3.5.2 3.5.3 3.5.4 3.5.5 4 Front-end processing . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 30 5 Weak signal processing . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 33 5.1 FM IF-processing . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 33 5.1.1 5.1.2 5.1.3 5.1.4 5.1.5 5.1.6 5.2 AM IF-processing . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 36 5.2.1 5.2.2 5.2.3 6 Application schematics . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 38 6.1 Basic application schematic . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 38 6 ...
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... Dynamic channel selection filter (DISS Table 27. Soft mute . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 33 Table 28. Adjacent channel mute . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 34 Table 29. Stereo blend . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 34 Table 30. High cut control . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 35 Table 31. De-emphasis filter . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 36 Table 32. Stereo decoder . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 36 Table 33. Channel selection filter . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 36 Table 34. Soft mute . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 36 Table 35. High cut control . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 37 Table 36. Document revision history . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 41 4/42 Doc ID 15938 Rev 8 TDA7705 ...
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... TDA7705 List of figures Figure 1. Functional block diagram . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6 Figure 2. Pin connection (top view Figure "write" sequence . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 13 2 Figure "read" sequence . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 14 Figure 5. SPI modes . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 15 Figure 6. SPI "write" sequence . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 15 Figure 7. SPI "read" sequence Figure bus timing diagram . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 21 Figure 9. SPI bus timing diagram Figure 10. ...
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... Block diagram and pins description 1 Block diagram and pins description 1.1 Block diagram Figure 1. Functional block diagram 6/42 SUM SUM Doc ID 15938 Rev 8 TDA7705 ...
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... TDA7705 1.2 Pin description Figure 2. Pin connection (top view) Table 2. Pin description Pin # Pin name 1 LF1 2 PLLTEST 3 DAC 4 TCAGCFM 5 FMMIX1dec 6 FMIX1in 7 FMIX2in 8 GND-RF 9 FMPINDRV 10 VCC-RF 11 TCAM 12 AMPINDRV 13 PINDdec 14 PINDin 15 GND-LNA 16 LNAin LFI 2 PLLTEST 3 DAC 4 TCAGCFM 5 FMMIX1dec 6 FMMIX1in 7 FMMIX2in 8 GND-RF 9 FMPINDRV VCC-RF ...
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... DSP supply RDS interrupt Reserved Reserved Reserved Reserved For debug purpose only, connected to GND Reset pin (active low) Test input 1.2V DSP supply Digital GND for 1.2V VDD 5V supply of audio DAC Xtal osc output Xtal osc input Doc ID 15938 Rev 8 TDA7705 ...
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... TDA7705 Table 2. Pin description (continued) Pin # Pin name 52 GND-DAC 53 DACoutL 54 DACoutR 55 GND-IFADC 56 LIFrefL 57 LIFrefH 58 VCC-IFADC 59 VCC-PLL 60 GND-PLL 61 VCO-dec 62 LFref 63 VCC-VCO 64 GND-VCO Block diagram and pins description Function Audio DAC GND Audio output left Audio output right IF ADC GND IF ADC reference low ...
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... The time constant of the AM-AGC is defined with an external capacitor and programmable internal currents. 2 mixers The image-rejection mixer has two AM inputs selectable via software. It easily supports low- cost applications for extended frequency bands like SW, DRM. The input frequency is converted to low IF with high image rejection. 10/42 Doc ID 15938 Rev 8 TDA7705 ...
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... TDA7705 2.6 IF A/D converters A high performance IQ-IFADC converts the IF-signal to digital IF for subsequent digital signal processing. 2.7 Audio D/A converters A stereo DAC provides the left / right audio signals after IF-processing and stereodecoding by the DSP. 2.8 VCO The VCO is fully integrated without any external tuning component. It covers all FM frequency bands including EU Japan, EastEU, Weatherband and AM-bands including LW, MW, SW ...
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... The high level commands include among others: ● set frequency (which allows to avoid computing the PLL divider factors); ● start seek (the seek operation can be carried out by the TDA7705 in a completely autonomous fashion); ● RDS seek/search (jumps to AF and quality measurements are automatically sequenced) ...
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... TDA7705 Table 3. Boot mode pin configuration Configuration: Pin at reset 0 39 RDSINT in 37 SCL x 36 SDA (SPI_MISO (SPI_CS serial bus is chosen as means of communication with the controlling device, two chip addresses are possible: 0xC2/C3 or 0xC8/C9, depending on the initial configuration of pins 35 and 39. The status of pins 35 and 39 during the reset phase can be set to: high, through external < ...
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... The sequence is very similar to the "write" one and has the same constraints for start, stop, data latching. The differences follow: ● a chip address must always be sent by the µP to the TDA7705; the address must be C3 (if C2 had been selected at boot (if C8 had been selected at boot); ● ...
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... TDA7705 Figure 5. SPI modes In the case of the TDA7705, the data are latched on the clock's rising edge, with CPOL = 1 and CPHA = 1 (mode 3 in the figure above). According to the specification of this mode, the polarity of the CLK line when no communication is taking place is high. A "write" communication example is shown in the figure below, for an unspecified number of bits (see the relevant technical documentation for frame structure description): Figure 6 ...
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... V = 1.08 V 1V2 (2) see note V = 1.2 V 1V2 (2) see note V = 1.32 V 1V2 (2) see note Doc ID 15938 Rev 8 TDA7705 Min Typ Max Units - - 5.5 V -55 - 150 °C ≥ ±2000 ≥ ±450 V ≥ ±750 ≥ ±150 Value Units 55 ° ...
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... TDA7705 3.4 Electrical characteristics 3.4 section Table section Symbol Parameter FM IMR mixer R Input resistance in V Input noise voltage noise rd IIP3 3 order intercept point FM AGC RFAGC threshold, referred to mixer input; RF level RFAGC-Thr Threshold steps Threshold error Threshold temperature drift IFAGC threshold, referred to mixer input ...
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... MHz source - High ohmic Mix 1,2 min setting Mix 1,2 max setting - @ °C amb - ( °C; see note amb - ( °C; see note amb Doc ID 15938 Rev 8 TDA7705 Min Typ Max Units kΩ - 126 - dBµV - 8.5 12 nV/√Hz - 8.5 12 126 129 - dBµ ...
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... TDA7705 3.4.3 VCO Table 9. VCO Symbol Parameter F Frequency range VCO VCO PN Phase noise of LO dev Deviation error (rms) 3.4.4 Phase locked loop Table 10. Phase locked loop Symbol Parameter T Settling time FM settle FM step FM frequency step AM step AM frequency step 3.4.5 Tuning DAC Table 11. ...
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... RSTN must be low reset the device Minimum time during which the voltage applied at pins 25 and 39 must be kept in order to latch the correct boot mode (serial bus configuration out out Doc ID 15938 Rev 8 TDA7705 Min Typ Max Units - 1 - Vrms - 15 - KHz Ω 600 750 ...
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... TDA7705 2 3.4 interface The following parameters apply to the serial bus communication when I been selected at start-up. For the other electrical characteristics of the pins, applies. The parameters of the following table are defined Table 15 interface Symbol f SCL Clock frequency SCL t SCL low to SDA data valid ...
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... HI-Z SPI_MISO V OL 3.4.11 Warning When the TDA7705 is not powered on, the internal ESD protection diodes pull-down keep 2 the I C/SPI lines connected to ground. This implies that the I TDA7705 may not be used to drive other devices when the TDA7705 is powered off. 22/42 Parameter t CSS ...
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... TDA7705 3.5 Overall system performance All measurements obtained with application of control) unless otherwise specified. 3.5.1 FM overall system performance Antenna level equivalence: 0 dBµ µV Figure 10. FM input set- 6dB rf Input level referred to signal generator loaded with 50 Ω input not connected kHz. De-emphasis = 50 µs. Unless otherwise specified audio Table 17 ...
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... Desired = 40 dBµV, dev = 40 kHz, 400 Hz, SINAD = 30 dB Undesired1 = ±400 kHz, dev = 40 kHz, 1 kHz (1) Undesired2 = ±800 kHz, no mod Desired = 40 dBµV, dev=40kHz, 400 Hz, SINAD=30 dB Undesired1 =±1 MHz, dev=40kHz, 1 kHz Undesired2=±2MHz, no mod m =30 % Doc ID 15938 Rev 8 TDA7705 Min Typ Max Units - 0. 140 - kHz - 25 - ...
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... TDA7705 Table 17. FM overall system performance (continued) Parameter Image rejection Logarithmic field strength indicator 1. Signal levels referred to combiner output. 3.5 overall system performance Antenna level equivalence: 0 dBµ µV Figure 11 input set 6dB rf Level referred to SG output before antenna dummy (V 15pF+68pF, FM input not connected. F ...
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... Doc ID 15938 Rev 8 TDA7705 Min Typ Max Units - ...
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... TDA7705 3.5 overall system performance Antenna level equivalence: 0 dBµ µV Figure 12 input set- 6dB rf Level referred to SG output before antenna dummy (V 15pF+68pF; FM input not connected 400 Hz, unless otherwise specified. audio Table 19 overall system performance Parameter Tuning range LW Tuning step LW Sensitivity Ultimate S/N AGC F ...
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... Test condition (can be modified by the user) (can be modified by the user) S/N =20dB @ 80 dBµV Ref.=74 dBµV -10dB drop point Doc ID 15938 Rev 8 TDA7705 PCB UNDER TEST 68pF =74 dBµV, mod = 30 %, Min Typ Max Units 2300 - 30000 kHz ...
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... TDA7705 3.5.5 WX overall system performance Antenna level equivalence: 0 dBµ µV Figure 14. WX input set- 6dB rf Input level referred to signal generator loaded with 50 Ω input not connected =400 Hz. De-emphasis = 75 µs. Application: WX using mixer input 2, in conjunction audio with FM narrow-band. Unless otherwise specified. ...
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... AM AGC time constant slow (125 ms with 1 µF) medium (25 ms with 1 µF) fast (5 ms with 1 µF) AM AGC threshold @ mixin 90 dBµV 91 dBµV 92 dBµV 93 dBµV 90 dBµV 89 dBµV 88 dBµV 87 dBµV AM AGC attack time constant normal fast TDA7705 ...
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... TDA7705 Table 23. Register 0x01 MSB Table 24. Register 0x02 MSB … … … … … … … … 1. Normally handled by tuner drivers. Register number Register number Doc ID 15938 Rev 8 Front-end processing Register definition LSB mixer input selector input #1 input #2 FM mixer gain ...
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... Front-end processing Table 25. Register 0x05 MSB 32/42 Register number Doc ID 15938 Rev 8 Register definition LSB PLLTEST output status 0 low 1 high TDA7705 ...
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... TDA7705 5 Weak signal processing All the parameters in this section refer to the programmability of the DSP part of the device. The typical values are those set by default parameters (start-up without parametric change from main µP); the max and the min values refer to the programmability range. The values ...
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... V step-like variation from rf 0.001 80 dBµ dBµV Threshold on pilot tone deviation for mono-stereo transition Difference in pil. det. deviation threshold for stereo to mono transition compared to PilThrM2S Doc ID 15938 Rev 8 TDA7705 Min Typ Max Units Min Typ Max Units 0 40 ...
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... TDA7705 5.1.5 High cut control Table 30. High cut control (continuous set) Symbol Parameter HCFSsp Start point vs. field strength HCFSep End point vs. field strength Field strength-related HCFStW2N transition time from wide to narrow band Field strength-related HCFStN2W transition time from narrow to wide band HCMPsp Start point vs ...
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... Test condition response: - 3dB Test condition audio atten = 1 dB read “FM_softmute” no adjacent channel present audio atten = SMd + 1 dB read “FM_softmute” no adjacent channel present - - 0.001 - 0.001 Doc ID 15938 Rev 8 TDA7705 Min Typ Max Units - 50 - µ Min Typ Max Units ...
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... TDA7705 5.2.3 High cut control Table 35. High cut control (continuous set) Symbol Parameter HCFSsp Start point vs. field strength HCFSep End point vs. field strength Field strength-related HCFStW2N transition time from wide to narrow band Field strength-related HCFStN2W transition time from narrow to wide band ...
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... OSCout 50 OSCin 51 GND-DAC 52 DACoutL 53 DACoutR 54 GND-IFADC 55 LIFrefL 56 LIFrefH 100nF 57 VCC-IFADC 58 VCC-PLL 59 GND-PLL 60 VCOdec 61 LFref 62 VCC-VCO 63 GND-VCO 64 Doc ID 15938 Rev 8 TDA7705 1uF 10nF 1/2W 27 VDD-3V3 32 REG-1V2 31 470nF VCCREG12 30 VCC-DIG 100nF 29 GND-DIG 28 1uF VREFdec 27 VREF165 1uF 26 GND-IF 25 68pF AMMIXdec 24 AMMIXin1 1K 23 AMMIXin2 22 68uH ...
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... TDA7705 6.2 Application schematic example with SPI-bus and tuned preselection Figure 16. Example of FM tuned (narrow-band) application / SPI control DACOUT_L DACOUT_R 1. Note: components marked with a * are being considered for replacement with resistors, pending optimization test results. VCC-DAC 49 OSCout 50 OSCin 51 GND-DAC 52 DACoutL 53 DACoutR ...
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... TQFP64 Doc ID 15938 Rev 8 TDA7705 OUTLINE AND MECHANICAL DATA LQFP64 ( 1.4mm 0.08mm ccc Seating Plane C K 0051434 F ® ...
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... TDA7705 8 Revision history Table 36. Document revision history Date 31-Jul-2007 01-Aug-2008 08-May-2009 09-Jun-2009 01-Jul-2009 13-Jan-2010 29-Jan-2010 22-Mar-2010 Revision 1 Initial release. 2 Full update datasheet. Document status promoted from preliminary data to datasheet. Updated Table 1: Device summary on page Updated Section 3: Electrical specifications on page 3 Updated Section 4: Front-end processing on page ...
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... Australia - Belgium - Brazil - Canada - China - Czech Republic - Finland - France - Germany - Hong Kong - India - Israel - Italy - Japan - Malaysia - Malta - Morocco - Philippines - Singapore - Spain - Sweden - Switzerland - United Kingdom - United States of America 42/42 Please Read Carefully: © 2010 STMicroelectronics - All rights reserved STMicroelectronics group of companies www.st.com Doc ID 15938 Rev 8 TDA7705 ...