TDA7705TR STMicroelectronics, TDA7705TR Datasheet
TDA7705TR
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TDA7705TR Summary of contents
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... Table 1. Device summary Order code TDA7705 TDA7705TR March 2010 Highly integrated tuner for AM/FM car radio It contains mixers and IF amplifiers for AM and FM, fully integrated VCO and PLL synthesizer, IF-processing including adaptive bandwidth control, stereo decoder and RDS decoder on a single chip ...
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Contents Contents 1 Block diagram and pins description . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6 1.1 Block diagram ...
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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 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . ...
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List of tables List of tables Table 1. Device summary . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . ...
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TDA7705 List of figures Figure 1. Functional block diagram . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . ...
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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 ...
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Block diagram and pins description Table 2. Pin description (continued) Pin # Pin name 17 LNAdec 18 LNAout 19 LNAin2 20 LNAout2 21 LNAdec2 22 AMMIXin2 23 AMMIXin1 24 AMMIXdec 25 GND-IF 26 VREF165 27 VREFdec 28 GND-DIG 29 VCC-DIG ...
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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 ...
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Function description 2 Function description 2 mixers The image-rejection mixer has two FM inputs, selectable through software. These inputs feed stages with different gains, noise figures, and IIP3. They are optimized for best performance in case of a ...
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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 ...
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Function description 2.12 IO interface pins The TDA7705 has the following IO pins: PLLTEST pin 2 SPI_CS pin 34 SPI_MISO pin 35 SDA/MOSI pin 36 SCL/CLK pin 37 RDSINT pin 39 RSTN pin 45 The pins labeled GPIO0 ...
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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 ...
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Function description The sequence consists of the following phases: ● START: SDA line transitioning from with SCL fixed H. This signifies a new transmission is starting; ● data latching: on the rising SCL edge. The SDA line ...
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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 ...
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Electrical specifications 3 Electrical specifications 3.1 Absolute maximum ratings Table 4. Absolute maximum ratings Symbol Parameter V Supply voltage CC T Storage temperature stg V ESD withstand voltage ESD 3.2 Thermal data Table 5. Thermal data Symbol Parameter Thermal resistance ...
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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 ...
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Electrical specifications 3.4 section Table section Symbol Parameter AM IMR Mixer R Input resistance in V Max. output voltage out_max V Input noise voltage N,in rd IIP3 3 order intercept point nd IIP2 2 order ...
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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 ...
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Electrical specifications 3.4.7 Audio DAC Table 13. Audio DAC Symbol Parameter V Max. output voltage out BW Bandwidth R Output resistance out V Output noise N, out THD Distortion 3.4.8 IO interface pins Table 14. IO interface pins Symbol Parameter ...
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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 as in ...
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Electrical specifications 3.4.10 SPI interface The following parameters apply to the serial bus communication when SPI protocol has been selected at start-up. For the other electrical characteristics of the pins, applies. Table 16. SPI interface Symbol f Clock frequency SCK ...
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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 ...
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Electrical specifications Table 17. FM overall system performance (continued) Parameter Distortion Max deviation Adjacent channel selectivity Alternate channel selectivity Max. strong signal interferer Max. strong signal interferer no preselection (“wide-band”) application 3 signal performance 3 signal performance no preselection (“wide-band”) ...
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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 ...
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Electrical specifications Table 18 overall system performance (continued) Parameter Strong signal interferer SNR Strong signal interferer suppression Strong signal interferer cross-modulation Image rejection Logarithmic field strength indicator 26/42 Test condition ΔF= ±40 kHz desired = 40 dBµV undesired ...
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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. F ...
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Electrical specifications 3.5 overall system performance Antenna level equivalence: 0dBµV = 1µV Figure 13 input set- 6dB rf Level referred to SG output before antenna dummy (V 15pF+68pF; FM input not connected ...
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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 ...
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Front-end processing 4 Front-end processing All the parameters in this section refer to the programmability of the FE part of the device (registers). The part of the registers that are not described here have either fixed values or values written ...
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TDA7705 Table 23. Register 0x01 MSB Table 24. Register 0x02 MSB ...
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Front-end processing Table 25. Register 0x05 MSB 32/42 Register number Doc ID 15938 Rev 8 Register definition LSB ...
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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 ...
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Weak signal processing 5.1.3 Adjacent channel mute Table 28. Adjacent channel mute (continuous set) Symbol Parameter ACMd Depth 5.1.4 Stereo blend- Table 29. Stereo blend (continuous set) Symbol Parameter MaxSep Maximum stereo separation SBFSsp Start point vs. field strength SBFSep ...
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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 ...
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Weak signal processing Table 31. De-emphasis filter (continuous set) Symbol Parameter De-emphasis time constant 1 - DEtc De-emphasis time constant 2 - 5.1.6 Stereo decoder Table 32. Stereo decoder Symbol Parameter PilSup Pilot signal suppression SubcSup Subcarrier suppression 5.2 AM ...
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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 ...
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Application schematics 6 Application schematics 6.1 Basic application schematic Figure 15. FM wide-band application / I DACOUT_L DACOUT_R 1. Note: components marked with a * are being considered for replacement with resistors, pending optimization test results. 38/ control ...
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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 ...
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Package information 7 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. ...
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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 ...
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