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(R) TDA7340 AUDIO SIGNAL PROCESSOR AUDIOPROCESSOR: MUTE, SOFT MUTE AND ZERO CROSSING MUTE ONE DIFFERENTIAL, TWO STEREO AND TWO MONO INPUTS DIFFERENTIAL PHONE INPUT VOLUME, BASS, TREBLE AND LOUDNESS CONTROL FOUR SPEAKER ATTENUATORS WITH INDEPENDENT ATTENUATION CONTROL STEREODECODER: ADJUSTMENT FREE INTEGRATED 456KHz VCO HIGH CUT CONTROL STEREO BLEND NOISE BLANKER: INTEGRATED HIGH-PASS FILTER NOISE RECTIFIER OUTPUT FOR QUALITY DETECTION PROGRAMMABLE TRIGGER THRESHOLD PAUSE DETECTOR: PROGRAMMABLE THRESHOLD ALLFUNCTIONS PROGRAMMABLEVIA I2C BUS DESCRIPTION The TDA7340 I2C bus controlled audio signal processor contains all signal processing blocks of a high performance car radio, including audioprocessor, stereodecoder, noise blanker, pause PQFP44 ORDERING NUMBER: TDA7340P detector and different mute functions. The use of BICMOS technology allows the implementation of several filter functions with switched capacitor techniques like fully integrated, adjustment free PLL Loop filter, pilot detector with integrator and two 19KHz notch filters. This minimizes the number of external components. Due to a highly linear signal processing, using CMOS-switching techniques instead of standard bipolar multipliers, very low distortion and very low noise are obtained also in the stereodecoder part. The audioprocessor contains several new features like softmute, zero-crossing mute and pause detector. Very low Dc stepping is obtained by use of a BICMOS technology. September 1999 1/16 TDA7340 AUDIO PROCESSOR PART FEATURES: Input Multiplexer: DIFFERENTIAL CD STEREO INPUT CASSETTE STEREO INPUT FM STEREO INPUT FROM STEREODECODER AM INPUT: MONO OR STEREO MODE (PROGRAMMABLE) BEEP INPUT (ONLY IN AM MONO MODE) TELEPHONE DIFFERENTIAL MONO INPUT GAIN PROGRAMMABLE IN 3 x 3.75dB STEPS Loudness: FULLY PROGRAMMABLE 15 x 1.25dB STEPS Volume Control: 1.25dB COARSE ATTENUATOR 0.31dB FINE ATTENUATORS MAX GAIN 20dB MAX ATTENUATION 59.7dB (PLUS LOUDNESS) Bass Control 7 x 2dB STEPS 2nd ORDER SYMMETRICAL OR NON SYMMETRICAL FREQUENCY RESPONSE (PROGRAMMABLE) Treble Control 7 x 2dB STEPS Speaker Control 4 INDEPENDENT SPEAKER CONTROL IN 1.25dB STEPS CONTROL RANGE 37.5dB INDEPENDENT SPEAKER MUTE Mute Functions DIRECT MUTE ZERO CROSSING MUTE WITH PROGRAMMABLE THRESHOLD SOFT MUTE WITH EXTERNAL DEFINED SLOPE Pause Detector PROGRAMMABLE THRESHOLD DELAY TIME DEFINED BY AN EXTERNAL CAPACITOR STEREO DECODER PART FEATURES: INTEGRATED 19KHZ NOTCH FILTER FOR PILOT CANCELLATION ON CHIP FILTER FOR PILOT DETECTOR AND PLL ADJUSTMENT FREE VOLTAGE CONTROLLED OSCILLATOR AUTOMATIC PILOT DEPENDENT MONO/STEREO SWITCHING VERY HIGH INTERMODULATION AND INTERFERENCE SUPPRESSION 2 I C BUS CONTROLLED (STD OFF, FORCED MONO, STEREO) HIGH CUT CONTROL STEREO BLEND NOISE BLANKER PART FEATURES: INTERNAL 2nd ORDER HIGH-PASS FILTER NOISE RECTIFIER OUTPUT FOR SIGNAL QUALITY DETECTION PROGRAMMABLE TRIGGER THRESHOLD TRIGGER THRESHOLD DEPENDENT ON HIGH FREQUENCY NOISE BLANKING TIME PROGRAMMABLE BY EXTERNAL CAPACITOR VERY LOW OFFSET CURRENT DURING HOLD TIME DUE TO OPAMPS WITH MOS INPUTS LEVEL INPUT FOR ADDITIONAL SPIKE DETECTION ON FIELD STRENGTH 2/16 1F C2 CD 47nF C4 IN R IN L BIN L BOUT L BIN R LOUD L LOUD R CSM BOUT R TR L TR R OUT LR MUTE VOLUME + LOUDNESS BASS TREBLE SOFT MUTE OUT LF OUT RR OUT RF 47nF C5 47nF C6 C7 C9 C10 C11 2.7nF 2.7nF C12 BLOCK DIAGRAM 6.2K R1 4x 100nF C8 6.2K R2 OUT R CD L+ CD R+ OUT L 4x 4.7F 1F C3 6x 1F OUT LR OUT LF OUT RR OUT RF SCL SDA DIGGND AM_R (AM MONO) AM_L (BEEP) CASS R PAUSE I2C BUS CASS L MUX PHONE IN FM R FM L PHONE GND VCO PLL 456KHz DEMODULATOR 19KHz NOTCH 25KHz LP NOISE BLANKER HC L 1nF C13 HIGH CUT CONTROL HC R 1nF C14 HP LEVEL CONTROL PULSE FORMER MPX 80KHz LP 1F SUPPLY PEAK DETECTOR TDA7340 CREF C1 47nF C15 field strength PAUSE LEVEL PEAK 47nF C16 TBLANK 470pF C17 100K R3 VSB VR 68K 47K R4 (*) reflevel level R5 VHCC D93AU046B VDD GND 47K R6 (**) NETWORK TO BE ADAPTED TO THE SPECIFIC REQUESTS FOR STEREO BLEND AND HIGH CUT CONTROL TDA7340 3/16 TDA7340 ABSOLUTE MAXIMUM RATINGS Symbol VS Tamb Tstg Operating Supply Voltage Operating Temperature Range Storage Temperature Range Parameter Value 10.5 -40 to 85 -55 to 150 Unit V C C PIN CONNECTION AM_R (AM MONO) AM_L (BEEP) BOUT R CASS R BOUT L CASS L OUT R BIN R BIN L 44 43 42 41 40 39 38 37 36 35 34 OUT L IN L CREF LOUD L LOUD R GND DIGGND VDD CSM SCL SDA 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 PAUSE VCO TBLANK LEVEL VHCC PEAK MPX HCR VSB HCL VR 33 32 31 30 TR L CD L+ CD LCD RCD R+ PHON IN PHON GND OUT LF OUT RF OUT LR OUT RR TR R 29 28 27 26 25 24 23 D94AU055A IN R TDA7340P (PQFP44) THERMAL DATA Symbol Rth j-pins Parameter Thermal Resistance Junction-pins Value max 85 Unit C/W ELECTRICAL CHARACTERISTICS (VS = 9V; Tamb = 25C; RL = 10K; all gains = 0dB; f = 1KHz; unless otherwise specified, refer to the Test Circuit.) Symbol Parameter Supply Voltage Supply Current Ripple Rejection Test Condition Min. 6 10 5 Typ. 9 20 12.5 90 55 100 2.6 100 0 11.25 3.75 2.3 2 3 Max. 10 25 20 Unit V mA mA dB dB K Vrms dB K dB dB dB V mV mV SUPPLY VS IS SVR Stereo Decoder = ON Stereo Decoder = OFF Audioprocessor Stereo Decoder + Audioprocessor INPUT SECTION RI VCL SI RL GI MIN GI MAX GSTEP eIN VDC Input Resistance Clipping Level Input Separation Output Load Resistance Minimum Input Gain Max Input Gain Step Resolution Input Noise Dc Steps d 0.3% 70 2.1 80 2 -0.75 10.25 2.75 130 0.75 12.25 4.75 10 Single Ended Input Adjacent Gain Step GMIN to GMAX 4/16 TDA7340 ELECTRICAL CHARACTERISTICS (continued.) Symbol Parameter Test Condition Min. Typ. Max. Unit DIFFERENTIAL CD STEREO INPUT RI CMRR d eIN GDIFF Input Resistance Common Mode Rejection Ratio Distortion Input Noise Differential Gain Input selector BIT D6 = 0 (0dB) Input selector BIT D6 = 1(-6dB) VCM = 1VRMS ; f = 1KHz f = 10KHz VI = 1VRMS 20Hz to 20KHz; Flat; D6 = 0 D6 = 0 D6 = 1 -1 -7 10 14 48 45 15 20 75 70 0.01 5 0 -6 20 30 K K dB dB % V dB dB 0.08 1 -5 DIFFERENTIAL TELEPHONE MONO INPUT RI CMRR d eIN GDIFF Input Resistance Common Mode Rejection Ratio Distortion Input Noise Differential Gain VCM = 1VRMS ; f = 1KHz VI = 1VRMS 20Hz to 3 KHz; Flat -4.75 14 45 20 60 0.15 10 -3.75 26 0.5 -2.75 K dB % V dB VOLUME CONTROL RI C MAX AMAX ASTEPC ASTEPF EA ET VDC Input Resistance (INR, INL) Max Gain Max Attenuation Step Resolution Coarse Attenuation Step Resolution Fine Attenuation Attenuation Set Error Tracking Error DC Steps Adjacent Attenuation Steps from 0dB to AMAX -3 0.1 0.5 24 18.75 57.7 0.50 0.11 G = -20 to 20dB G = -20 to -59.7dB -1.25 3 35 20 59.7 1.25 0.31 0 46 21.25 62.7 2.00 0.51 1.25 2 2 3 5 K dB dB dB dB dB dB dB mV mV LOUDNESS CONTROL (LOUDL, LOUDR) RI ASTEP AMAX Internal Resistance Step Resolution Max Attenuation 35 0.5 17.5 50 1.25 18.75 65 2.0 20.0 K dB dB ZERO CROSSING MUTE VTH Zero Crossing Threshold (1) WIN = 11 WIN = 10 WIN = 01 WIN = 00 AMUTE VDC Mute Attenuation DC Step 80 0dB to Mute 20 40 80 160 100 0.3 mV mV mV mV dB mV 3 SOFT MUTE AMUTE tD Mute Attenuation Delay Time CEXT = 22nF; 0 to -20dB; I = IMAX I = IMIN 45 0.8 15 60 1.5 25 2.0 45 dB ms ms (1) WIN represents the MUTE programming bit pair D6,D5 for the zero crossing window threshold 5/16 TDA7340 ELECTRICAL CHARACTERISTICS (continued.) Symbol Parameter Test Condition Min. 11.5 1 35 13 1 Typ. 14 2 50 14 2 Max. 16 3 65 15 3 Unit BASS CONTROL C RANGE ASTEP RB Control Range Step Resolution Internal Feedback Resistance dB dB K TREBLE CONTROL CRANGE ASTEP Control Range Step Resolution dB dB SPEAKER ATTENUATORS CRANGE ASTEP AMUTE EA VDC Control Range Step Resolution Output Mute Attenuation Attenuation Set Error DC Step Adjacent Attenuation Steps 0.1 Data Word = 38.75dB 35.0 0.5 80 37.5 1.25 100 1.50 3 40.0 2.0 dB dB dB dB mV AUDIO OUTPUTS VCLIP RL ROUT VDC Clipping Level Output Load Resistance Output Impedance DC Voltage Level 3.5 d = 0.3% 2.1 2 30 3.8 100 4.1 2.6 VRMS K V PAUSE DETECTOR VTH Zero Crossing Threshold (1) WIN = 11 WIN = 10 WIN = 01 WIN = 00 IDELAY VTHP Pull-up Current Pause Threshold 15 20 40 80 160 25 3.0 35 mV mV mV mV A V GENERAL ENO Output Noise BW = 20Hz to 20KHz, flat Output Muted All gains = 0dB All gains 0dB; VO = 1VRMS ; VI = 1VRMS ; 80 AV = 0 to -20dB; AV = -20 to -60dB; 2.5 5 106 0.01 100 0 0 1 2 0.08 15 V V dB % dB dB dB S/N d SC ET Signal to Noise Ratio Distortion Channel Separation Left/Right Total Tracking Error BUS INPUT V IL VIH IIN VO Input Low Voltage Input High Voltage Input Current Output Voltage SDA Acknowledge VIN = 0.4V IO = 1.6mA 3 -5 0.4 5 0.8 1 V V A V (1) WIN represent the MUTE programming bit paIr D6,D5 for the zero crossing window threshold 6/16 TDA7340 STEREO DECODER PART ELECTRICAL CHARACTERISTICS (VS = 9V; modulation frequency: 1KHz; de-emphasis time: T = 50s; nominal MPX input voltage: VMPX = 0.5VRMS (75KHz deviation); GI = 3.5dB; T amb = 27C; unless otherwise specified) Symbol VIN R IN GMIN GMAX GSTEP SVRR VO THD Parameter MPX Input Level Input Resistance Minimum Input Gain Maximum Input Gain Step Resolution Supply Voltage Ripple Rejection DC Output Voltage (HCL, HCR) Channel Separation Total Harmonic distortion Signal plus noise to noise ratio Test Condition Min. 35 2.5 9.5 1.75 50 4.2 Typ. 0.5 50 3.5 11 2.5 60 4.5 50 0.02 91 Max. 1.25 65 4.5 12.5 3.25 4.8 0.2 Unit VRMS K dB dB dB dB V dB % dB VRIPPLE = 100mV; f = 1KHz VSB - VR = 100mVDC f = 200Hz to 16KHz; S = 2VRMS S+N N 19 38 57 76 2 3 57 67 114 190 VINTH VINTH CARRIER AND HARMONIC SUPPRESSION AT THE OUTPUT Pilot Signal f = 19KHz Subcarrier f = 38KHz Subcarrier f = 57KHz Subcarrier f = 76KHz 55 75 75 62 90 dB dB dB dB INTERMODULATION (note 1) fmod = 10KHz; fspur = 1KHz fmod = 13KHz; fspur = 1KHz Signal f = 57KHz 65 75 dB dB TRAFFIC RADIO (note 2) 70 dB SCA - SUBSIDIARY COMMUNICATIONS AUTHORIZATION (note 3) Signal f = 67KHz 75 dB ACI - ADJACENT CHANNEL INTERFERENCE (note4) Signal f = 114KHz Signal f = 190KHz 95 84 dB dB MONO/ STEREO SWITCH Pilot Threshold Voltage Pilot Threshold Voltage for stereo "ON" Pth = 1 Pth = 0 for stereo "OFF" Pth = 1 Pth = 0 = 6dB; VR = 3.6V (note 5) = 26dB; 11 18 6 13 15 25 12 19 22 34 18 25 mVRMS mVRMS mVRMS mVRMS V mV STEREO BLEND VSB-VR VSB-VR Control Voltage for Channel Separation Control Voltage for Channel Separation -0.31 -0.26 -50 -0.23 HIGH CUT CONTROL deemp R HCC R HCC De-Emphasis Time Constant High Cut Control Resistance High Cut Control Resistance C13, C14 = 1nF; V HCC-VR = 100mV VHCC-VR = 100mV VHCC-VR = -1.3V (note 6) 50 50 150 s K K 115 185 VCO fOSC f/f Oscillator Frequency Capture and Holding Range 456 1 7/16 TDA7340 ELECTRICAL CHARACTERISTICS (continued) Symbol Parameter Test Condition Min. Typ. Max. Unit NOISE INTERFERENCE DETECTOR V TR Trigger Threshold (1) (see pulse slope fig 3) meas. with VRECT = 1.2V meas. with VRECT = 1.4V VRECT Rectifier Voltage VMPXIN = 0mV VMPXIN = 50mV;f = 150KHz VMPXIN = 100mV; f = 150KHz TS IOS Suppression Pulse Duration Input Offset Current During Suppression Time CBLANK = 470pF NTB = 00 NTB = 10 NTB = 11 NTB = 00 NTB = 10 NTB = 11 0.5 2.0 100 130 170 150 200 250 0.9 1.5 2.5 40 10 1.3 3.0 mVP mVP mVP mVP mVP mVP V V V s pA (1) NTB represent the STDEC programming bit pair D6, D5 for the noise blanker trigger threshold NOTES TO THE CHARACTERISTICS 1 INTERMODULATION SUPPRESSION 2 = 3 = VO (signal) (at1KHz) ; fs = (2 x 10KHz) - 19KHz VO (spurious) (at1KHZ) VO (signal) (at1KHz) ; fs = (3 x 13KHz) - 38KHz VO (spurious) (at1KHZ) measured with : 91% mono signal; 9% pilot signal; fm=10KHz or 13KHz 2. TRAFFIC RADIO (V.F.) suppression 57 (V.W.F.) = VO(signal) (at1KHz) VO (spurious) (at1KHZ 23Hz) measured with : 91% stereo signal; 9% pilot signal; fm=1KHz; 5% subcarrier (f=57KHz, fm = 23Hz AM, m = 60%) 3. SCA (SUBSIDIARY COMMUNICATIONS AUTHORIZATION) 67 = VO(signal) (at1KHz) ; fs = (2 x 38KHz) - 67KHz VO (spurious) (at9KHZ) measured with : 81% mono signal; 9% pilot signal; fm=1KHz; 10% SCA - subcarrier (fs = 67KHz, unmodulated) 4. ACI (ADJACENT CHANNEL INTERFERENCE) 114 = 190 = VO (signal) (at1KHz) ; fs = 110KHz - (3 x 38KHz) VO (spurious) (at4KHZ) VO (signal) (at1KHz) ; fs = 186KHz - (5 x 38KHz) VO (spurious) (at4KHZ) measured with : 90% mono signal; 9% pilot signal; fm=1KHz; 1% spurious signal (fs = 110KHz or 186KHz, unmodulated) 8/16 TDA7340 NOTES TO THE CHARACTERISTICS (continued) 5. Control range typ 11% of VR (see figure 2) 6. Control range typ 30% of VR (see figure 1) Figure 1: High Cut Control Figure 2: Stereo Blend SEP (dB) 50 VR=3.6V 40 30 20 10 0 -0.4 -0.3 -0.2 -0.1 VSB-VR(V) D94AU056 Figure 3 VMPX VTH (*) All thresholds are measured by using a pulse with TR = 2s, THIGH = 2s and TF = 10s. The repetition rate must not increase the PEAK voltage. DC-LEVEL D94AU185 Time TR T HIGH TF I2C BUS INTERFACE Interface Protocol The interface protocol comprises: A start condition (s) A chip address byte, (the LSB bit determines read/write transmission). CHIP ADDRESS MSB S 1 0 0 0 1 0 0 LSB R/W ACK MSB X X T I SUBADDRESS A subaddress byte A sequence of data (N-bytes + acknowledge) A stop condition (P) DATA 1 ... DATA n LSB MSB ACK DATA LSB ACK P A3 A2 A1 A0 D95AU216 ACK = Acknowledge S = Start P = Stop I = Autoincrement MAX CLOCK SPEED 500kbits/s Autoincrement If bit I in the subaddress byte is set to "1", the autoincrement of subaddress is enabled. 9/16 TDA7340 SUBADDRESS (RECEIVE MODE) MSB X X T I A3 0 0 0 0 0 0 0 0 1 1 A2 0 0 0 0 1 1 1 1 0 0 A1 0 0 1 1 0 0 1 1 0 0 LSB A0 0 1 0 1 0 1 0 1 0 1 Input Selector Loudness Volume Bass, Treble Speaker Attenuator LF Speaker Attenuator LR Speaker Attenuator RF Speaker Attenuator RR Mute Stereodecoder FUNCTION T = Testmode I = Autoincrement X = Not Used ST = Stereo (HIGH = active) X = Not used The transmitted data is automatically updated after each 9th clock pulse. Transmission can be repeated without new chipaddress. TRANSMITTED DATA (SEND MODE) MSB X X X X ST SM ZM LSB P P = Pause (low active) ZM =Zero Crossing Muted (HIGH = active) SM = Soft mute activated (HIGH = active) DATA BYTE SPECIFICATION X = not relevant; set to "1"during testing INPUT SELECTOR MSB D7 0 1 D6 D5 D4 D3 D2 0 0 0 0 1 1 0 0 0 1 1 0 1 1 1 0 0 1 1 0 1 0 1 0 1 D1 0 0 0 1 1 0 0 1 0 1 1 LSB D0 0 0 1 0 1 0 1 1 1 0 1 Quasi Diff CD Full Diff CD Stereo Decoder Cassette Stereo AM Mono Telephone Mono Beep Mono AM Stereo Not allowed Not allowed Not allowed 11.25dB gain 7.5dB Gain 3.75dB Gain 0 dB Gain FUNCTION 0dB Differential input Gain (CD Input) -6dB Differential input Gain (CD Input) For example to select quasi diff CD input with 0dB diff gain and 7.5dB input gain the Data Byte is: 00001000 10/16 TDA7340 LOUDNESS MSB D7 X X X X X X X X X X X X X X X X X D6 X X X X X X X X X X X X X X X X X D5 X X X X X X X X X X X X X X X X X D4 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 1 D3 0 0 0 0 0 0 0 0 1 1 1 1 1 1 1 1 D3 D2 0 0 0 0 1 1 1 1 0 0 0 0 1 1 1 1 D2 D1 0 0 1 1 0 0 1 1 0 0 1 1 0 0 1 1 D1 LSB D0 0 1 0 1 0 1 0 1 0 1 0 1 0 1 0 1 D0 0dB -1.25dB -2.5dB -3.75dB -5dB -6.25dB -7.5dB -8.75dB -10dB -11.25dB -12.5dB -13.75dB -15dB -16.25dB -17.5dB -18.75dB loudness OFF (1) LOUDNESS 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. D0 to D3 determine the attenuation level. MUTE MSB D7 D6 D5 D4 D3 D2 D1 0 1 1 0 0 1 0 0 1 1 0 1 0 1 0 1 1 0 LSB D0 1 1 1 Soft Mute On Soft Mute with fast slope (I = IMAX) Soft Mute with slow slope (I = IMIN) Direct Mute Zero Crossing Mute ON ZC Mute OFF (delayed until next zero crossing) Zero Crossing Mute and Pause Detector Reset 160mV ZC Window Threshold (WIN = 00) 80mV ZC Window Threshold (WIN = 01) 40mV ZC Window Threshold (WIN = 10) 20mV ZC Window Threshold (WIN = 11) Nonsymmetrical Bass Cut Symmetrical Bass Cut FUNCTION An additional direct mute function is included in the Speaker Attenuators 11/16 TDA7340 SPEAKER ATTENUATORS MSB D7 1 1 1 1 1 1 1 1 1 1 1 1 1 D6 1 1 1 1 1 1 1 1 1 1 1 1 1 D5 1 1 1 1 1 1 1 1 1 1 1 1 1 0 0 1 1 1 0 1 0 1 1 1 1 1 D4 D3 D2 0 0 0 0 1 1 1 1 D1 0 0 1 1 0 0 1 1 LSB D0 0 1 0 1 0 1 0 1 SPEAKER ATTENUATORS LF, LR, RF, RR -1.25dB STEPS 0dB -1.25dB -2.5dB -3.75dB -5dB -6.25dB -7.5dB -8.75dB 10dB STEPS 0dB -10dB -20dB -30dB Speaker Mute For example an attenuationof 25dB on a selected output is given by: 11110100 STEREO DECODER MSB D7 D6 D5 D4 D3 D2 D1 0 0 1 1 1 1 1 0 1 1 0 1 0 0 1 LSB D0 0 1 0 1 11dB Input Gain 8.5dB Input Gain 6dB Input Gain 3.5dB Input Gain Stereo Decoder Muted Stereo Decoder Off Forced Mono Noise Blanker Threshold 1 (NTB = 00) Noise Blanker Threshold 2 (NTB = 10) Noise Blanker Threshold 3 (NTB = 11) Pilot Threshold High (Pth = 0) Pilot Threshold Low (Pth = 1) FUNCTION For example pilot threshold low, noise blanker threshold 2 (NTB = 10), Stereo decoder ON, 6dB input gain is given by: 11000010. 12/16 TDA7340 BASS/TREBLE MSB D7 D6 D5 D4 D3 0 0 0 0 0 0 0 0 1 1 1 1 1 1 1 1 0 0 0 0 0 0 0 0 1 1 1 1 1 1 1 1 0 0 0 0 1 1 1 1 1 1 1 1 0 0 0 0 0 0 1 1 0 0 1 1 1 1 0 0 1 1 0 0 0 1 0 1 0 1 0 1 1 0 1 0 1 0 1 0 D2 0 0 0 0 1 1 1 1 1 1 1 1 0 0 0 0 D1 0 0 1 1 0 0 1 1 1 1 0 0 1 1 0 0 LSB D0 TREBLE STEPS 0 1 0 1 0 1 0 1 1 0 1 0 1 0 1 0 -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 FUNCTION For example12dB TREBLE and -8dB BASS give the following Data Byte : 00111001 13/16 TDA7340 VOLUME MSB D7 D6 D5 D4 D3 D2 D1 0 0 1 1 0 0 0 0 1 1 1 1 0 0 0 0 1 1 1 1 0 0 1 1 0 0 1 1 0 1 0 1 0 1 0 1 0 0 1 1 0 0 1 1 0 1 0 1 0 1 0 1 LSB D0 0 1 0 1 0 -0.31dB -0.62dB -0.94dB 1.25dB COARSE ATTENUATION STEPS 0dB -1.25dB -2.5dB -3.75dB -5dB -6.25dB -7.5dB -8.75dB 10dB GAIN ATTENUATION STEPS 20dB 10dB 0dB -10dB -20dB -30dB -40dB -50dB FUNCTION 0.31dB FINE ATTENUATION STEPS For example to select -47.81dB Volume the Data Byte is: 11011001 STATUS AFTER POWER ON RESET VOLUME BASS, TREBLE SPKRS LF, RF, LR, RR LOUDNESS INPUT STEREODEC MUTE -59.69dB Treble = +2dB, Bass = 0dB, symmetrical -37.5dB OFF, -17.5dB No input selected, GAIN = 0dB, DIFF CD GAIN = -06dB, FULLY DIFF MODE OFF, FORCED MONO, 6dB GAIN, PILOT THRESHOLD LOW, NOISE BLANKER =11 DIRECTLY MUTED, SOFT OFF, ZEROCROSS RESET, WINDOW THRESHOLD =11 14/16 TDA7340 DIM. MIN. A A1 A2 B c D D1 D3 e E E1 E3 L L1 K 0.65 12.95 9.90 0.25 1.95 0.30 0.13 12.95 9.90 13.20 10.00 8.00 0.80 13.20 10.00 8.00 0.80 1.60 0(min.), 7(max.) 0.95 0.026 13.45 10.10 0.510 0.390 2.00 2.10 0.45 0.23 13.45 10.10 mm TYP. MAX. 2.45 0.010 0.077 0.012 0.005 0.51 0.390 0.52 0.394 0.315 0.031 0.520 0.394 0.315 0.031 0.063 0.037 0.530 0.398 0.079 0.083 0.018 0.009 0.53 0.398 MIN. inch TYP. MAX. 0.096 OUTLINE AND MECHANICAL DATA PQFP44 (10 x 10) D D1 D3 A1 33 34 23 22 0.10mm .004 Seating Plane A A2 E3 E1 B 44 1 11 12 E B e L1 L C K PQFP44 15/16 TDA7340 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. Specification mentioned in this publication are subject to change without notice. This publication supersedes and replaces all information previously supplied. STMicroelectronics products are not authorized for use as critical components in life support devices or systems without express written approval of STMicroelectronics. The ST logo is a registered trademark of STMicroelectronics (c) 1999 STMicroelectronics - Printed in Italy - All Rights Reserved STMicroelectronics GROUP OF COMPANIES Australia - Brazil - China - Finland - France - Germany - Hong Kong - India - Italy - Japan - Malaysia - Malta - Morocco Singapore - Spain - Sweden - Switzerland - United Kingdom - U.S.A. http://www.st.com 16/16 |
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