TDA7340G STMicroelectronics, TDA7340G Datasheet
TDA7340G
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TDA7340G Summary of contents
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... DEVIATION AND FIELD STRENGTH DE- PENDENT TRIGGER ADJUSTMENT PAUSE DETECTOR: PROGRAMMABLE THRESHOLD ALL FUNCTIONS PROGRAMMABLE VIA I DESCRIPTION 2 The TDA7340G I C bus controlled audio signal processor contains all signal processing blocks of September 1999 AUDIO SIGNAL PROCESSOR ORDERING NUMBER: TDA7340G a high performance car radio, including audio- processor, stereodecoder, noise blanker, pause detector and different mute functions ...
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... TDA7340G AUDIO PROCESSOR PART FEATURES: Input Multiplexer: DIFFERENTIAL CD STEREO INPUT CASSETTE STEREO INPUT FM STEREO INPUT FROM STEREODE- CODER AM INPUT: MONO OR STEREO MODE (PROGRAMMA- BLE) BEEP INPUT (ONLY IN AM MONO MODE) TELEPHONE DIFFERENTIAL MONO INPUT GAIN PROGRAMMABLE 3.75dB STEPS Loudness: FULLY PROGRAMMABLE ...
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... BLOCK DIAGRAM R BIN L BOUT L BIN OUT R OUT TDA7340G 3/27 ...
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... TDA7340G ABSOLUTE MAXIMUM RATINGS Symbol V Operating Supply Voltage S T Operating Temperature Range amb T Storage Temperature Range stg PIN CONNECTION THERMAL DATA Symbol R Thermal Resistance Junction-pins th j-pins ELECTRICAL CHARACTERISTICS ( unless otherwise specified, refer to the Test Circuit.) REF Symbol Parameter SUPPLY V Supply Voltage ...
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... I RMS 20Hz to 20KHz; Flat 1KHz CM RMS RMS 20Hz to 3 KHz; Flat G = -20 to 20dB G = -20 to -59.7dB Adjacent Attenuation Steps from 0dB to A MAX WIN = 11 WIN = 10 WIN = 01 WIN = 00 0dB to Mute C = 22nF EXT MAX 0 to -20dB MIN TDA7340G Min. Typ. Max. Unit 0.01 0. ...
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... TDA7340G ELECTRICAL CHARACTERISTICS (continued.) Symbol Parameter BASS CONTROL C Control Range RANGE A Step Resolution STEP R Internal Feedback Resistance B TREBLE CONTROL C Control Range RANGE A Step Resolution STEP SPEAKER ATTENUATORS C Control Range RANGE A Step Resolution STEP A Output Mute Attenuation MUTE E Attenuation Set Error Step ...
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... VDC f = 20Hz to 16KHz RMS for stereo "ON" for stereo "OFF" 6dB 3.6V (note 26dB 1nF 100mV 13 14 HCC- 100mV HCC- -1.3V (note 6) HCC-VR TDA7340G = 3.5dB un- I amb Min. Typ. Max. Unit 0.5 1.25 V RMS 2.5 3.5 4.5 dB 9.5 11 12.5 dB 1.75 2.5 3. ...
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... TDA7340G ELECTRICAL CHARACTERISTICS (continued) Symbol Parameter NOISE INTERFERENCE DETECTOR V Trigger Threshold (see pulse slope fig 3) V Rectifier Voltage RECT T Suppression Pulse Duration S I Input Offset Current During OS Suppression Time V Deviation Dependent Rectifier RECTDEV Voltage 9) V Field strength Controlled Rectifier RECTFS Voltage 10) ...
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... OVD represent the SPKR_LR bit pair D 10) FSC represent the SPKR_RF bit pair D 11) The TDA7340G has a dedicated internal circuitry providing a soft power-on. The I2C bus data programmation must start after the reference DC level has reached the target Vs/2 value, otherwise a pop can be generated. The Cref pin and Out pins rise time at power on are riported in Figg ...
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... TDA7340G Figure 1: High Cut Control Figure 3 V MPX V TH DC-LEVEL D94AU185 HIGH BUS INTERFACE PROTOCOL The interface protocol comprises: A start condition (s) A chip address byte, (the LSB bit determines read/write transmission). CHIP ADDRESS MSB LSB R/W D95AU216 ACK = Acknowledge S = Start P = Stop ...
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... Quasi Diff Full Diff Stereo Decoder Cassette Stereo Mono Telephone Mono Beep Mono Stereo Not allowed Not allowed Not allowed 0 11.25dB gain 1 7.5dB Gain 0 3.75dB Gain Gain 0dB Differential input Gain (CD Input) -6dB Differential input Gain (CD Input) TDA7340G FUNCTION FUNCTION 11/27 ...
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... TDA7340G LOUDNESS MSB For example to select -17.5dB loudness the Data Byte is: XXX01110 Note (1): If the loudness is switched OFF, the loudness stage is acting like a volume attenuator with flat frequency response determine the attenuation level MUTE MSB additional direct mute function is included in the Speaker Attenuators ...
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... Stereo Decoder Muted 1 Stereo Decoder Off Forced Mono Noise Blanker Threshold 1 NBT 35mV Noise Blanker Threshold 2 NBT 45mV Noise Blanker Threshold 3 NBT 55mV Noise Blanker Threshold 4 NBT 65mV Pilot Threshold High (P Pilot Threshold Low (P TDA7340G SPEAKER ATTENUATORS LF, LR, RF, RR FUNCTION = 13/27 ...
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... TDA7340G NOISE BLANKER: SPKR LF MSB NOISE BLANKER: SPKR LR MSB NOISE BLANKER: SPKR RF MSB NOISE BLANKER: SPKR RR MSB See Noise blanker description 14/27 LSB Noise Contrelled Trigger Adjustment (NAT THNOISE V THNOISE V THNOISE V THNOISE Noise Blanker Trigger Threshold Fine Adjust The NBT Threshold is reduced by 5mV ...
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... For example12dB TREBLE and -8dB BASS give the following Data Byte : 00111001 LSB TREBLE STEPS -14dB -12dB -10dB -8dB -6dB -4dB -2dB 0dB 0dB 2dB 4dB 6dB 8dB 10dB 12dB 14dB BASS STEPS -14dB -12dB -10dB -8dB -6dB -4dB -2dB 0dB 0dB 2dB 4dB 6dB 8dB 10dB 12dB 14dB TDA7340G FUNCTION 15/27 ...
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... TDA7340G VOLUME MSB For example to select -47.81dB Volume the Data Byte is: 11011001 STATUS AFTER POWER ON RESET VOLUME -59.69dB BASS, TREBLE Treble = +2dB, Bass = 0dB, symmetrical SPKRS LF, RF, LR, RR -37.5dB LOUDNESS OFF, -17.5dB INPUT No input selected, GAIN = 0dB, DIFF CD GAIN = -06dB, FULLY DIFF MODE ...
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... Input Mode The NB of TDA7340G offers two input modes. The first one uses the internal trigger path and optional the LEVEL input. But the TDA7340G of- fers also an external trigger mode. During this mode the internal MPX trigger path is disabled whereas the high pass at the LEVEL pin is bypassed ...
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... TDA7340G Figure 4: Block Diagram of the Noise Blanker 80KHz LP 140KHz HP MPX IN 120KHz HP LEVEL 2 I C-BUS D95AU330 Figure 5: Trigger Threshold vs STEPS 18/27 SIGNAL PATH RECT PEAK AUTOMATIC AMP BUF THRESHOLD CONTROL RECT-PEAK 2 4 ADDITIONAL THRESHOLD CONTROL (ATC-SB, MPX_RECT) R PEAK C PEAK 82K 47nF peak VTH MIN ...
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... V PEAK (V) 3.2 2.3 1.3 0.9 D95AU332A MUTE & PAUSE FEATURES The TDA7340G provides three types of mute, controlled via I2C bus (see pag.12, MUTE BYTE register). SOFT MUTE Bit D0=1 Soft Mute ON Bit D0=0 Soft Mute OFF It allows an automatic soft muting and unmuting of the signal ...
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... TDA7340G In application, the soft mute ON programmation should be followed by programmation of DIRECT MUTE ON (see later) in order to achieve a final 100dB attenuation. Beside the I2C bus programmation, the Soft Mute ON can be generated in a fast way by forcing a LOW level at pin phone GND, controlled by the P through a transistor. This approach is recom- mended for fast RDS AF switching ...
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... STOP condition BUS READ MODE The TDA7340G gives to the master a 1 byte "TRANSMITTED INFO" via I2C bus in read mode. The read mode is Master activated by sending the chip address with LSB set to 1, fol- lowed by acknowledge bit. ...
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... TDA7340G No possibility to change the loud boost rate at a certain volume level. The TDA7340G implements a fully programmable loudness control in 15 steps of 1.25dB. It allows a customized loudness response for each application. The external network connected to the loudness pins LOUD_L and LOUD_R fixes the type of loud- ...
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... D95AU383 Vout VS=8V Ripple=0.2VRMS AV=-15dB 10K Freq(Hz) Capacitor C =10 F REF BWL 0.5s/DIV SOFT MUTE=ON SLOPE=FAST Vout=500mVrms V V CH1 9V DC CH1 0.5V CH2 20mV SOFT MUTE CH3 0.2V CH4 20mV TDA7340G D95AU381 2 1 TIME D95AU384 Chan 2 1ms 0.2V Chan 3 1ms TIME T/div 1ms ...
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... TDA7340G Figure 13: Soft Mute ON SOFT MUTE=OFF SLOPE=FAST Vout=500mVrms V Main Menu Pin Csm V Vout CH1 9V DC SOFT MUTE Figure 16: Pause Detector PAUSE DETECTOR ZCW=160mV Cpause=100nF V Vout Main Menu CH2 4.12V DC 24/27 Figure 14: Zero Crossing Mute ON V Panel STATUS Memory Save PANEL Recall ...
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... Figure 18: Sym _Bass (dB -10 -15 10 100 1K Figure 20: Loudness ATT (dB 100 1K Figure 19: Non_Sym _Bass ATT D95AU393 (dB -10 -15 -20 -25 10K Freq(Hz) 10 D95AU395 10K Freq(Hz) TDA7340G D95AU394 100 1K 10K Freq(Hz) 25/27 ...
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... TDA7340G mm DIM. MIN. TYP. MAX. A 2.45 A1 0.25 A2 1.95 2.00 2.10 B 0.30 0.45 c 0.13 0.23 D 12.95 13.20 13.45 D1 9.90 10.00 10.10 D3 8.00 e 0.80 E 12.95 13.20 13.45 E1 9.90 10.00 10.10 E3 8.00 L 0.65 0.80 0. (min.), 7 (max 26/27 inch MIN. TYP. MAX. 0.096 ...
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