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 September 1999 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. 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 2/16 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 1µF 6x 1µF MPX VCO PHONE GND PHONE IN CASS L (AM MONO) AM_L (BEEP) CASS R AM_R VDD GND SUPPLY 80KHz LP MUX CREF CD R+ OUT R OUT L PAUSE IN R C1 47nF C15 PAUSE TDA7340 PLL 456KHz FM L FM R 1µF C3 field strength LEVEL HP 47nF C5 C7 4x 100nF C8 C9 TBLANK 470pF C17 PEAK 100K R3 PULSE FORMER C10 VSB BOUT R 6.2K R2 NOISE BLANKER BASS 47nF C16 19KHz NOTCH I2C BUS SOFT MUTE CSM 47nF C6 PEAK DETECTOR 25KHz LP LOUD R VOLUME + LOUDNESS DEMODULATOR MUTE LOUD L 47nF C4 BOUT L 6.2K R1 BIN R 1µF C2 BIN L IN L (**) NETWORK TO BE ADAPTED TO THE SPECIFIC REQUESTS FOR STEREO BLEND AND HIGH CUT CONTROL CD L+ 4x 4.7µF CD R5 68K reflevel VR LEVEL CONTROL 47K R4 (*) 47K R6 VHCC OUT RF D93AU046B HC R HC L 1nF C14 1nF C13 DIGGND SDA SCL OUT RR OUT RF OUT LF OUT RR OUT LR OUT LF OUT LR level TR R 2.7nF C12 HIGH CUT CONTROL TREBLE TR L C11 2.7nF TDA7340 BLOCK DIAGRAM 3/16 TDA7340 ABSOLUTE MAXIMUM RATINGS Symbol Parameter Value 10.5 V Tamb Operating Temperature Range -40 to 85 °C Tstg Storage Temperature Range -55 to 150 °C VS Operating Supply Voltage Unit TR R CASS R CASS L AM_R (AM MONO) AM_L (BEEP) BOUT L BIN L BOUT R BIN R OUT R IN R PIN CONNECTION 44 43 42 41 40 39 38 37 36 35 34 OUT L 1 33 TR L IN L 2 32 CD L+ CREF 3 31 CD L- LOUD L 4 30 CD R- LOUD R 5 29 CD R+ GND 6 28 PHON IN DIGGND 7 27 PHON GND VDD 8 26 OUT LF CSM 9 25 OUT RF SCL 10 24 OUT LR SDA 11 23 OUT RR TDA7340P (PQFP44) MPX VHCC VR VSB HCL HCR LEVEL TBLANK PEAK VCO PAUSE 12 13 14 15 16 17 18 19 20 21 22 D94AU055A THERMAL DATA Symbol Rth j-pins Parameter Thermal Resistance Junction-pins Value Unit max 85 °C/W ELECTRICAL CHARACTERISTICS (VS = 9V; Tamb = 25°C; RL = 10KΩ; all gains = 0dB; f = 1KHz; unless otherwise specified, refer to the Test Circuit.) Symbol Parameter Test Condition Min. Typ. Max. Unit 6 10 5 9 20 12.5 90 55 10 25 20 V mA mA dB dB 70 2.1 80 2 -0.75 10.25 2.75 100 2.6 100 130 0 11.25 3.75 2.3 2 3 0.75 12.25 4.75 KΩ Vrms dB KΩ dB dB dB µV mV mV SUPPLY VS IS Supply Voltage Supply Current SVR Ripple Rejection Stereo Decoder = ON Stereo Decoder = OFF Audioprocessor Stereo Decoder + Audioprocessor INPUT SECTION RI VCL SI RL GI MIN GI MAX GSTEP eIN VDC 4/16 Input Resistance Clipping Level Input Separation Output Load Resistance Minimum Input Gain Max Input Gain Step Resolution Input Noise Dc Steps d ≤ 0.3% Single Ended Input Adjacent Gain Step GMIN to GMAX 10 TDA7340 ELECTRICAL CHARACTERISTICS (continued.) Symbol Parameter Test Condition Min. Typ. Max. Unit Input selector BIT D6 = 0 (0dB) Input selector BIT D6 = 1(-6dB) VCM = 1VRMS ; f = 1KHz f = 10KHz 10 14 48 15 20 75 20 30 KΩ KΩ dB 45 70 0.01 5 0.08 dB % -1 -7 0 -6 1 -5 µV dB dB 14 45 20 60 26 KΩ dB 0.5 -4.75 0.15 10 -3.75 -2.75 % µV dB DIFFERENTIAL CD STEREO INPUT RI CMRR d e IN GDIFF Input Resistance Common Mode Rejection Ratio Distortion Input Noise VI = 1VRMS 20Hz to 20KHz; Flat; D6 = 0 Differential Gain D6 = 0 D6 = 1 DIFFERENTIAL TELEPHONE MONO INPUT RI CMRR d e IN GDIFF Input Resistance Common Mode Rejection Ratio Distortion Input Noise Differential Gain VCM = 1VRMS ; f = 1KHz VI = 1VRMS 20Hz to 3 KHz; Flat VOLUME CONTROL 24 35 46 KΩ C MAX AMAX ASTEPC RI Input Resistance (INR, INL) Max Gain Max Attenuation Step Resolution Coarse Attenuation 18.75 57.7 0.50 20 59.7 1.25 21.25 62.7 2.00 dB dB dB ASTEPF 0.11 0.31 0.51 dB EA Step Resolution Fine Attenuation Attenuation Set Error -1.25 3 0 ET Tracking Error 1.25 2 2 dB dB dB VDC DC Steps -3 0.1 0.5 3 5 mV mV G = -20 to 20dB G = -20 to -59.7dB Adjacent Attenuation Steps from 0dB to AMAX LOUDNESS CONTROL (LOUDL, LOUDR) RI ASTEP Internal Resistance Step Resolution 35 0.5 50 1.25 65 2.0 KΩ dB AMAX Max Attenuation 17.5 18.75 20.0 dB ZERO CROSSING MUTE V TH AMUTE VDC Zero Crossing Threshold (1) Mute Attenuation DC Step WIN = 11 WIN = 10 WIN = 01 20 40 80 mV mV mV WIN = 00 160 100 0.3 3 mV dB mV 60 1.5 25 2.0 45 dB ms ms 80 0dB to Mute SOFT MUTE AMUTE tD Mute Attenuation Delay Time C EXT = 22nF; 0 to -20dB; I = IMAX I = I MIN 45 0.8 15 (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. Typ. Max. Unit BASS CONTROL C RANGE ASTEP RB ±11.5 ±14 ±16 dB Step Resolution 1 2 3 dB Internal Feedback Resistance 35 50 65 KΩ ±13 ±14 ±15 dB 1 2 3 dB 35.0 37.5 40.0 dB 0.5 1.25 2.0 dB 80 100 1.50 dB 3 mV Control Range TREBLE CONTROL C RANGE ASTEP Control Range Step Resolution SPEAKER ATTENUATORS C RANGE Control Range ASTEP Step Resolution AMUTE Output Mute Attenuation EA Attenuation Set Error VDC DC Step Data Word = 38.75dB Adjacent Attenuation Steps 0.1 dB AUDIO OUTPUTS VCLIP RL Clipping Level d = 0.3% Output Load Resistance ROUT Output Impedance VDC DC Voltage Level 2.1 2.6 VRMS 2 3.5 KΩ 30 100 Ω 3.8 4.1 V PAUSE DETECTOR V TH Zero Crossing Threshold (1) WIN = 11 20 mV WIN = 10 40 mV WIN = 01 80 mV WIN = 00 IDELAY Pull-up Current VTHP Pause Threshold 160 15 25 mV 35 3.0 µA V GENERAL ENO S/N Output Noise BW = 20Hz to 20KHz, flat Output Muted All gains = 0dB 2.5 5 Signal to Noise Ratio All gains 0dB; VO = 1VRMS ; 106 d Distortion VI = 1VRMS ; 0.01 SC Channel Separation Left/Right ET Total Tracking Error 80 15 µV µV dB 0.08 % 100 dB AV = 0 to -20dB; 0 1 dB AV = -20 to -60dB; 0 2 dB 1 V 5 µA 0.8 V BUS INPUT V IL Input Low Voltage VIH Input High Voltage IIN Input Current VIN = 0.4V VO Output Voltage SDA Acknowledge IO = 1.6mA 3 (1) WIN represent the MUTE programming bit paIr D6,D5 for the zero crossing window threshold 6/16 V -5 0.4 TDA7340 STEREO DECODER PART ELECTRICAL CHARACTERISTICS (VS = 9V; modulation frequency: 1KHz; de-emphasis time: T = 50µs; nominal MPX input voltage: VMPX = 0.5VRMS (75KHz deviation); GI = 3.5dB; T amb = 27°C; unless otherwise specified) Symbol Parameter VIN R IN GMIN GMAX GSTEP SVRR VO MPX Input Level Input Resistance Minimum Input Gain Maximum Input Gain Step Resolution Supply Voltage Ripple Rejection DC Output Voltage (HCL, HCR) α THD S+N N Channel Separation Total Harmonic distortion Signal plus noise to noise ratio Test Condition VRIPPLE = 100mV; f = 1KHz Min. Typ. Max. Unit 35 2.5 9.5 1.75 50 4.2 0.5 50 3.5 11 2.5 60 4.5 1.25 65 4.5 12.5 3.25 VRMS KΩ dB dB dB dB V VSB - VR = 100mVDC 50 0.02 91 f = 200Hz to 16KHz; S = 2VRMS 4.8 0.2 dB % dB CARRIER AND HARMONIC SUPPRESSION AT THE OUTPUT α19 α38 α57 α76 Pilot Signal f = 19KHz Subcarrier f = 38KHz Subcarrier f = 57KHz Subcarrier f = 76KHz 55 75 75 62 90 dB dB dB dB 65 75 dB dB 70 dB 75 dB 95 84 dB dB INTERMODULATION (note 1) α2 α3 fmod = 10KHz; fspur = 1KHz fmod = 13KHz; fspur = 1KHz TRAFFIC RADIO (note 2) α57 Signal f = 57KHz SCA - SUBSIDIARY COMMUNICATIONS AUTHORIZATION (note 3) α67 Signal f = 67KHz ACI - ADJACENT CHANNEL INTERFERENCE (note4) α114 α190 Signal f = 114KHz Signal f = 190KHz MONO/ STEREO SWITCH VINTH Pilot Threshold Voltage VINTH Pilot Threshold Voltage for stereo ”ON” Pth = 1 Pth = 0 for stereo ”OFF” Pth = 1 P th = 0 11 18 6 13 15 25 12 19 22 34 18 25 mVRMS mVRMS mVRMS mVRMS -0.31 -0.26 -0.23 V STEREO BLEND VSB-VR VSB-VR Control Voltage for Channel Separation Control Voltage for Channel Separation α = 6dB; VR = 3.6V (note 5) α = 26dB; -50 mV C13, C14 = 1nF; V HCC-VR = 100mV VHCC-VR = 100mV VHCC-VR = -1.3V (note 6) 50 50 150 µs KΩ KΩ HIGH CUT CONTROL τdeemp R HCC R HCC De-Emphasis Time Constant High Cut Control Resistance High Cut Control Resistance 115 185 VCO fOSC Oscillator Frequency ∆f/f 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 NTB = 00 100 mVP NTB = 10 NTB = 11 NTB = 00 NTB = 10 130 170 150 200 mVP mVP mVP mVP NTB = 11 VRECT Rectifier Voltage TS Suppression Pulse Duration IOS Input Offset Current During Suppression Time VMPXIN = 0mV 0.5 250 0.9 1.3 mVP V VMPXIN = 50mV;f = 150KHz VMPXIN = 100mV; f = 150KHz 2.0 1.5 2.5 3.0 V V C BLANK = 470pF (1) NTB represent the STDEC programming bit pair D6, D5 for the noise blanker trigger threshold NOTES TO THE CHARACTERISTICS 1 INTERMODULATION SUPPRESSION α2 = VO (signal) (at1KHz) ; fs = (2 x 10KHz) - 19KHz VO (spurious) (at1KHZ) α3 = 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 α57 (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) α67 = 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) α114 = VO (signal) (at1KHz) ; fs = 110KHz - (3 x 38KHz) VO (spurious) (at4KHZ) α190 = 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 40 10 µs pA 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 D94AU056 SEP (dB) 50 VR=3.6V 40 30 20 10 0 -0.4 -0.3 -0.2 -0.1 VSB-VR(V) Figure 3 (*) All thresholds are measured by using a pulse with TR = 2µs, THIGH = 2µs and TF = 10µs. The repetition rate must not increase the PEAK voltage. VMPX VTH DC-LEVEL Time D94AU185 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 SUBADDRESS LSB 0 0 0 1 0 0 A subaddress byte A sequence of data (N-bytes + acknowledge) A stop condition (P) R/W MSB ACK X DATA 1 ... DATA n LSB X T I A3 A2 A1 A0 MSB ACK LSB DATA ACK P 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 LSB X X T T = Testmode I A2 A1 A0 0 0 0 0 Input Selector 0 0 0 1 Loudness 0 0 1 0 Volume 0 0 1 1 Bass, Treble 0 1 0 0 Speaker Attenuator LF 0 1 0 1 Speaker Attenuator LR 0 1 1 0 Speaker Attenuator RF 0 1 1 1 Speaker Attenuator RR 1 0 0 0 Mute 1 0 0 1 Stereodecoder I = Autoincrement X = Not Used TRANSMITTED DATA (SEND MODE) MSB X LSB X FUNCTION A3 X X ST SM ZM P P = Pause (low active) ZM =Zero Crossing Muted (HIGH = active) SM = Soft mute activated (HIGH = active) 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. DATA BYTE SPECIFICATION X = not relevant; set to ”1”during testing INPUT SELECTOR MSB D7 LSB D6 D5 D4 D3 FUNCTION D2 D1 D0 0 0 0 0 Quasi Diff CD 1 0 0 0 Full Diff CD 0 0 1 Stereo Decoder 0 1 0 Cassette Stereo 1 0 1 1 0 1 0 AM Mono Telephone Mono 1 1 0 1 Beep Mono 0 0 1 1 AM Stereo 0 1 1 0 1 1 0 Not allowed Not allowed 1 1 1 Not allowed 0 0 11.25dB gain 0 1 7.5dB Gain 1 0 3.75dB Gain 1 1 0 dB Gain 0 0dB Differential input Gain (CD Input) 1 -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 LSB LOUDNESS D7 D6 D5 D4 D3 D2 D1 D0 X X X 0 0 0 0 0 0dB X X X 0 0 0 0 1 -1.25dB X X X 0 0 0 1 0 -2.5dB X X X 0 0 0 1 1 -3.75dB X X X 0 0 1 0 0 -5dB X X X 0 0 1 0 1 -6.25dB X X X 0 0 1 1 0 -7.5dB X X X 0 0 1 1 1 -8.75dB X X X 0 1 0 0 0 -10dB X X X 0 1 0 0 1 -11.25dB X X X 0 1 0 1 0 -12.5dB X X X 0 1 0 1 1 -13.75dB X X X 0 1 1 0 0 -15dB X X X 0 1 1 0 1 -16.25dB X X X 0 1 1 1 0 -17.5dB X X X 0 1 1 1 1 -18.75dB X X X 1 D3 D2 D1 D0 loudness OFF (1) 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 LSB D6 D5 D4 D3 D2 1 D1 FUNCTION D0 1 Soft Mute On 0 1 Soft Mute with fast slope (I = IMAX) 1 1 Soft Mute with slow slope (I = IMIN) Direct Mute 0 1 Zero Crossing Mute ON 0 0 ZC Mute OFF (delayed until next zero crossing) 1 Zero Crossing Mute and Pause Detector Reset 0 0 160mV ZC Window Threshold (WIN = 00) 0 1 80mV ZC Window Threshold (WIN = 01) 1 0 40mV ZC Window Threshold (WIN = 10) 1 1 20mV ZC Window Threshold (WIN = 11) 0 Nonsymmetrical Bass Cut 1 Symmetrical Bass Cut An additional direct mute function is included in the Speaker Attenuators 11/16 TDA7340 SPEAKER ATTENUATORS MSB LSB D7 D6 D5 1 1 1 1 D4 D3 SPEAKER ATTENUATORS LF, LR, RF, RR D2 D1 D0 1 0 0 0 0dB 1 1 0 0 1 -1.25dB 1 1 0 1 0 -2.5dB 1 1 1 0 1 1 -3.75dB 1 1 1 1 0 0 -5dB 1 1 1 1 0 1 -6.25dB 1 1 1 1 1 0 -7.5dB 1 1 1 1 1 1 -8.75dB 1 1 1 0 0 0dB 1 1 1 0 1 -10dB 1 1 1 1 0 -20dB 1 1 1 1 1 1 1 1 1 1 -1.25dB STEPS 10dB STEPS -30dB 1 1 1 Speaker Mute For example an attenuationof 25dB on a selected output is given by: 11110100 STEREO DECODER MSB D7 LSB D6 D5 D4 D3 D2 1 1 1 FUNCTION D1 D0 0 0 11dB Input Gain 0 1 8.5dB Input Gain 1 0 6dB Input Gain 1 1 3.5dB Input Gain Stereo Decoder Muted Stereo Decoder Off Forced Mono 0 0 Noise Blanker Threshold 1 (NTB = 00) 1 0 Noise Blanker Threshold 2 (NTB = 10) 1 1 Noise Blanker Threshold 3 (NTB = 11) 0 Pilot Threshold High (Pth = 0) 1 Pilot Threshold Low (Pth = 1) 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 LSB D6 D5 D4 FUNCTION D3 D2 D1 D0 0 0 0 0 -14dB 0 0 0 1 -12dB 0 0 1 0 -10dB 0 0 1 1 -8dB 0 1 0 0 -6dB 0 1 0 1 -4dB 0 1 1 0 -2dB 0 1 1 1 0dB 1 1 1 1 0dB 1 1 1 0 2dB 1 1 0 1 4dB 1 1 0 0 6dB 1 0 1 1 8dB 1 0 1 0 10dB 1 0 0 1 12dB 1 0 0 0 14dB TREBLE STEPS BASS STEPS 0 0 0 0 -14dB 0 0 0 1 -12dB 0 0 1 0 -10dB 0 0 1 1 -8dB 0 1 0 0 -6dB 0 1 0 1 -4dB 0 1 1 0 -2dB 0 1 1 1 0dB 1 1 1 1 0dB 1 1 1 0 2dB 1 1 0 1 4dB 1 1 0 0 6dB 1 0 1 1 8dB 1 0 1 0 10dB 1 0 0 1 12dB 1 0 0 0 14dB For example12dB TREBLE and -8dB BASS give the following Data Byte : 00111001 13/16 TDA7340 VOLUME MSB D7 LSB D6 D5 D4 D3 D2 D1 FUNCTION D0 0.31dB FINE ATTENUATION STEPS 0 0 0 0 1 -0.31dB 1 0 -0.62dB 1 1 -0.94dB 1.25dB COARSE ATTENUATION STEPS 0 0 0 0dB 0 0 1 -1.25dB 0 1 0 -2.5dB 0 1 1 -3.75dB 1 0 0 -5dB 1 0 1 -6.25dB 1 1 0 -7.5dB 1 1 1 -8.75dB 10dB GAIN ATTENUATION STEPS 0 0 0 0 0 1 20dB 10dB 0 1 0 0dB 0 1 1 -10dB 1 0 0 -20dB 1 0 1 -30dB 1 1 0 -40dB 1 1 1 -50dB For example to select -47.81dB Volume the Data Byte is: 11011001 STATUS AFTER POWER ON RESET VOLUME BASS, TREBLE -59.69dB 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 STEREODEC OFF, FORCED MONO, 6dB GAIN, PILOT THRESHOLD LOW, NOISE BLANKER =11 MUTE DIRECTLY MUTED, SOFT OFF, ZEROCROSS RESET, WINDOW THRESHOLD =11 14/16 TDA7340 mm DIM. MIN. TYP. A inch MAX. MIN. TYP. 2.45 A1 0.25 A2 1.95 B 0.096 0.010 2.10 0.077 0.30 0.45 0.012 0.018 c 0.13 0.23 0.005 0.009 D 12.95 13.20 13.45 0.51 0.52 0.53 D1 9.90 10.00 10.10 0.390 0.394 0.398 2.00 0.079 D3 8.00 0.315 e 0.80 0.031 0.083 E 12.95 13.20 13.45 0.510 0.520 0.530 E1 9.90 10.00 10.10 0.390 0.394 0.398 E3 8.00 L 0.65 L1 OUTLINE AND MECHANICAL DATA MAX. 0.80 0.315 0.95 0.026 1.60 K 0.031 0.037 0.063 PQFP44 (10 x 10) 0°(min.), 7°(max.) D D1 A D3 A2 A1 33 23 22 34 0.10mm .004 44 B E E1 B E3 Seating Plane 12 11 1 C L L1 e 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 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