TDA7437 STMicroelectronics, TDA7437 Datasheet
TDA7437
Specifications of TDA7437
Available stocks
Related parts for TDA7437
TDA7437 Summary of contents
Page 1
... FOUR INDEPENDENT SPEAKERS CONTROL IN 1dB STEPS FOR BALANCE AND FADER FACILITIES PAUSE DETECTOR THRESHOLD ALL FUNCTIONS PROGRAMMABLE VIA SE- 2 RIAL I CBUS DESCRIPTION The audioprocessor TDA7437 is an upgrade of the TDA731X audioprocessor family. PIN CONNECTION TREB_R MUXOUT_R LOUD_R DIFFGND_R STEREO4_R STEREO1_R STEREO2_R STEREO3_R ...
Page 2
... TDA7437 ABSOLUTE MAXIMUM RATINGS Symbol Operating Supply Voltage Operating Ambient Temperature amb T Storage Temperature Range stg THERMAL DATA Symbol R Thermal Resistance Junction-pins th j-amb QUICK REFERENCE DATA Symbol Supply Voltage ( Max. input signal handling CL THD Total Harmonic Distortion V = 1Vrms f = 1KHz S/N Signal to Noise Ratio ...
Page 3
... BLOCK DIAGRAM TREBL_L IN_L MULTIPLEXER TDA7437 PAUSE SMEXT BASS_RO) TREB_R IN_R MUXOUT_R 3/23 ...
Page 4
... TDA7437 ELECTRICAL CHARACTERISTICS (AV all gains = 0dB 1KHz. Refer to the test circuit, unless otherwise specified.) Symbol Parameter INPUT SELECTOR (MONO AND STEREO INPUTS) R Input Resistance I V Clipping Level CL S Input Separation I R Output Load Resistance L G Minimum Input Gain I MIN G Maximum Input Gain ...
Page 5
... DC Voltage Level DC Test Condition C = 22nF -20dB CSM MAX C = 22nF -20dB CSM MIN CSM MAX CSM MIN (note 2) Soft Mute Active -40dB V Data Word = 1111XXXX -40dB V Adjacent Attenuation Steps d = 0.3% TDA7437 Min. Typ. Max. Unit 0.8 1.5 2 100 K 3 11.5 14 ...
Page 6
... WIN = 10 WIN = 01 WIN = 1KHz Output Muted ( 20kHz flat) All Gains 0dB (B = 200 to 20kHz flat -20dB -20 to -60dB V All Gains = 0dB 2. =1V all gain = 0dB IN VIN = 0. 1.6mA for the zero crossing window threshold TDA7437 D00AU1125 Min. Typ. Max 110 220 3 10 111 ...
Page 7
... I C BUS INTERFACE Data transmission from microprocessor to the TDA7437 and viceversa takes place thru the 2 2 wires I C BUS interface, consisting of the two lines SDA and SCL (pull-up resistors to positive supply voltage must be externally connected). Data Validity As shown in fig. 3, the data on the SDA line must be stable during the high period of the clock ...
Page 8
... TDA7437 SOFTWARE SPECIFICATION Interface Protocol The interface protocol comprises: A start condition (s) A chip address byte,(the LSB bit determines CHIP ADDRESS MSB LSB R/W ACK = Acknowledge S = Start P = Stop I = Auto Increment X = Not used MAX CLOCK SPEED 500kbits/s ADDRpin open ADDRpin close AUTO INCREMENT If bit I in the subaddress byte is set to " ...
Page 9
... LOUDNESS OFF FINE VOLUME 0dB -0.25dB -0.5dB -0.75dB TDA7437 9/23 ...
Page 10
... TDA7437 Mute MSB Volume MSB 10/23 LSB FUNCTION Soft Mute On Soft Mute with fast slope Soft Mute with slow slope Zero Mute Direct Mute Reset Zerocross window (220mV) Zerocross window (110mV) Zerocross window (60mV) Zerocross window (30mV) Nonsymmetrical Bass Symmetrical Bass ...
Page 11
... Speaker MSB LSB TDA7437 FUNCTION 1.25dB step 0dB -1dB -2dB -3dB -4dB -5dB -6dB -7dB 0dB -8dB -16dB -24dB -32dB -40dB -48dB -56dB -64dB -72dB MUTE 11/23 ...
Page 12
... TDA7437 Bass Treble MSB 12/ LSB FUNCTION D0 TREBLE STEP 0 -14dB 1 -12dB 0 -10dB 1 -8dB 0 -6dB 1 -4dB 0 -2dB 1 0dB 1 0dB 0 2dB 1 4dB 0 6dB 1 8dB 0 10dB 1 12dB 0 14dB BASS STEPS -14dB -12dB -10dB -8dB -6dB -4dB -2dB 0dB 0dB 2dB 4dB 6dB 8dB 10dB 126B ...
Page 13
... MSB TDA7437 LSB FUNCTION D0 IN-GAIN STEP 0 0dB 1 1dB 0 2dB 1 3dB 0 4dB 1 5dB 0 6dB 1 7dB 0 8dB 1 9dB 0 10dB 1 11dB 0 12dB 1 13dB 0 14dB 1 15dB MIDDLE STEP -14dB -12dB -10dB -8dB -6dB -4dB -2dB 0dB 0dB 2dB 4dB 6dB 8dB 10dB 126B 14dB 13/23 ...
Page 14
... TDA7437 MUTE & PAUSE FEATURES The TDA7437 provides three types of mute, con- trolled via I2C bus (see pag. 10, MUTE BYTE regis- ter). 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. ...
Page 15
... Soft mute OFF bit Stereo signal detected (input MPX) bit Mono signal detected (input MPX) The TDA7437 allows the reading of four info bits. The type (Stereo/Mono) of received broadcasting signal is easily checked and displayed by using the ST bit. The P bit check is useful in tuning jumps without signal muting ...
Page 16
... STOP condition BUS READ MODE The TDA7437 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. ...
Page 17
... 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 TDA7437 D95AU381 2 1 TIME D95AU384 Chan 2 1ms 0.2V Chan 3 1ms TIME T/div 1ms ...
Page 18
... TDA7437 Figure 13: Soft Mute OFF 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 18/23 Figure 14: Zero Crossing Mute ON V Panel STATUS Memory Save PANEL ...
Page 19
... 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 D98AU887 10K Freq(Hz) TDA7437 D95AU394 100 1K 10K Freq(Hz) 19/23 ...
Page 20
... TDA7437 TEST BOARD DIAGRAM GND V CON1 C17 C18 22 F 100nF C19 5.6nF TRL C20 5.6nF 44 TRR 1 IN_R 2 C21 2 O_R C22 4.7nF CON4 4 LOUDR C23 4.7 F DIFG_R 5 DIFG_R C24 4.7 F DIFF_R 6 DIFF_R C25 470nF ST4_R 7 ST4_R C26 470nF ST1_R 8 ST1_R C27 470nF ...
Page 21
... L1 1.00 K (min.), 3.5˚(typ.), 7 (max inch TYP. MAX. MECHANICAL DATA 0.063 0.006 0.055 0.057 0.014 0.018 0.008 0.472 0.394 0.315 0.031 0.472 0.394 0.315 0.024 0.030 0.039 TQFP44 ( TQFP4410 TDA7437 OUTLINE AND 0.10mm .004 Seating Plane C K 21/23 ...
Page 22
... TDA7437 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 22/23 inch MIN. TYP. MAX. 0.096 ...
Page 23
... Australia - Brazil - Canada - China - Finland - France - Germany - Hong Kong - India - Israel - Italy - Japan - Malaysia - Malta - Morocco - Singapore - Spain - Sweden - Switzerland - United Kingdom - United States system, provided that the system conforms to the I The ST logo is a registered trademark of STMicroelectronics STMicroelectronics GROUP OF COMPANIES http://www.st.com TDA7437 2 C Patent 2 C 23/23 ...