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p-dso-28-1 semiconductor group 1 04.96 audioprocessor tda 4350x 1 overview 1.1 features stereo-soundprocessing ? three stereo af inputs, one of the inputs is equipped with floating ground. ? input level control for individual level setting of the several af sources in addition with a clipping detector. ? volume control with software controlled switchable loudness function. frequency response fixed by external components. ? bass- and treble control with clipping detector. ? four independent settable output attenuators for balance/fader function. ? fan-out of the af outputs software controlled. ? af outputs switchable for driving bride power amplifiers. ? i 2 c bus controlled immediately, or zero cross detector dependent mute, or immediately mute via extra pin. control part ? i 2 c bus interface ? control of sound processing ? read out of the clipping detector status. 1.2 application the tda 4350x is a single-chip audio-soundsystem. the circuit can be partitioned into two functional blocks: stereo-soundprocessing and control part. type ordering code package tda 4350x Q67000-A5060 p-dso-28-1
tda 4350x semiconductor group 2 04.96 1.3 pin configuration (top view) figure 1 p-dso-28-1
tda 4350x semiconductor group 3 04.96 1.4 pin definitions and functions pin no. function 1 cd input right 2 input 2 right 3 input 3 right 4 loudness output right 5 loudness input right 6 digital ground 7 mute 8 i 2 c bus scl 9 i 2 c bus sda 10 + v s supply voltage 11 corner frequency treble left 12 corner frequency treble right 13 af output right front 14 af output right rear 15 af output left rear 16 af output left front 17 rc network bass right 18 rc network bass right 19 rc network bass left 20 rc network bass left 21 analog ground 22 bias for af operation point 23 loudness output left 24 loudness input left 25 input 3 left 26 input 2 left 27 cd ground 28 cd input left
tda 4350x semiconductor group 4 04.96 1.5 functional block diagram figure 2 block diagram
tda 4350x semiconductor group 5 04.96 2 circuit description 2.1 signalprocessing 1. the selection of the af inputs happens in the input switch. there are three stereo-inputs available. one of the input pairs is equipped with a separate floating ground connection especially provided for external signal sources. crosstalk to this input is suppressed by common mode rejection. an input level control circuitry behind input switch realizes the adaption of different signal source levels. the circuit offers a control range from 0 db to + 25 db with a stepwidth of 2.5 db. an i 2 c bus controlled first clipping detector allows a software controlled level adaption. 2. next stage in signal path is volume control, with common setting for both channels, a control range of 0 db to C 78.75 db and a stepwidth of 1.25 db. in this stage a loudness function is realized. a loudness control circuit, in fact a second volume control circuit with identical structure, is to be set to a higher level as volume control. the resulting level difference fixes the maximum amplitude response of the loudness function. the frequency response, only bass boost or combined bass and treble boost is fixed by external components. because the volume and loudness control are strictly independent of each other, the frequency response and threshold of the loudness function is programmable via software. a switch bit allows to enable the loudness function easily. some possible loudness setups: figure 3 loudness function starting at max. vol. then d continuously increasing.
tda 4350x semiconductor group 6 04.96 figure 4 figure 5 loudness function starting at vol. a then d continuously increasing. loudness function starting at max. vol. increasing to d , following constant d .
tda 4350x semiconductor group 7 04.96 figure 6 3. in the following signalpath there is tone control, consisting of bass and treble control. bass control offers a control range of + 16 db to C 14 db with a stepwidth of 2 db. frequency characteristic, 1st order or 2nd order (resonance type) is fixed by external components. treble control also offers a control range of + 16 db to C 14 db with a stepwidth of 2 db. the treble control corner frequency is determinated by an external capacitor. a second clipping detector allows to detect clipping in tone control part. 4. last stages in signal path are four strictly independent controllable output attenuators to realize balance and fader function. each unit offers a control range of 0 db to C 38.75 db in steps of 1.25 db. the af outputs are of a class a-type to avoid distortion via software, the output fan-out can be increased to drive loads up to > 1.5 k w . one output of each stereo channel can be inverted software controlled, to drive easily bridge power amplifiers. 5. mute control may be either done via the volume control setting, or directly for all outputs by setting the im (immediately mute) bit via i 2 c bus. the second bus controlled mute mode is mute after signal zero crossing (zcm). two zero cross detectors are built-in, therefore this mute control works independent for left and right channel. signal off- and on-switching is performed under zero cross detector control. the zcm status can be read out via i 2 c bus (zcs). after activating zcm, the zcs (zero crossing status) bit is set to 1, when all outputs are muted after zero crossing. after deactivating zcm, the zcs bit is set to 0 when all outputs are switched on after zero crossing. the im mute overwrites zcm mute. third mute control is hardware mute via a mute pin. if the mute pin is switched to ground all outputs are muted immediately. hardware mute overwrites all other mute modes. loudness function starting at vol. a increasing to d , following constant d .
tda 4350x semiconductor group 8 04.96 2.2 controlpart all functions are controlled via an i 2 c bus interface. all data are stored into a latch circuit. the telegram structure is built as follows: startcondition C chipaddress C any number of databytes C stopcondition. for the databytes the following conditions must be fulfilled: before transmitting a databyte a subaddress byte must first be placed in the data telegram. 2.2.1 chipaddress 2.2.2 subaddress bytes msb lsb 1000011r/w r/w = 0 ? read r/w = 1 ? write msb lsb switchbyte 0 0 0 0 0 0 0 0 inputlevel 0 0 0 0 0 0 0 1 volume 0 0 0 0 0 0 1 0 loudness 0 0 0 0 0 0 1 1 bass/treble 0 0 0 0 0 1 0 0 out rear left 0 0 0 0 0 1 0 1 out front left 0 0 0 0 0 1 1 0 out rear right 0 0 0 0 0 1 1 1 out front right 0 0 0 0 1 0 0 0
tda 4350x semiconductor group 9 04.96 2.2.3 control bytes a) switch control byte b) input level control byte msb lsb zcm im fan ph in-3 in-2 in-cd x in-cd = 0 in-cd = 1 cd input off; power on cd input on in-2 = 0 in-2 = 1 input 2 off; power on input 2 on in-3 = 0 in-3 = 1 input 3 off; power on input 3 on if no input is selected, mute function is active. if no protection against multiple selection implemented! ph = 0 ph = 1 bridgepower amplifier operation on; power on normal operation fan = 0 fan = 1 normal operation; power on increased fan out on im = 0 im = 1 normal operation; power on immediate mute for all af outputs zcm = 0 zcm = 1 normal operation; power on mute after signal zero crossing im overwrites zcm, handware mute overwrites all other mute modes. msb lsb min. gain xxxx0 0 0 0 min. gain + 1 xxxx0 0 0 1 power on max. gain C 1 xxxx1 0 0 1 max. gain xxxx1 0 1 0 to max. gain xxxx1 1 1 1
tda 4350x semiconductor group 10 04.96 c) volume level control byte d) loudness control byte msb lsb min. gain x 0000000 min. gain + 1 x 0000001 power on max. gain C 1 x 0111110 max. gain x 0111111 msb lsb min. gain x ld 000000 min. gain + 1 x ld 000001 power on max. gain C 1 x ld 111110 max. gain x ld 111111 ld = 0 loudness off; power on (loudness attenuator has the same setting as volume attenuator) ld = 1 loudness on
tda 4350x semiconductor group 11 04.96 e) treble/bass control byte f ) output control bytes msb lsb linear 10001000 max. treble, lin. bass 00001000 min. treble, lin. bass 11111000 lin. treble, max. bass 10000000 lin. treble, min. bass 10001111 max. treble, max. bass 00000000 min. treble, min. bass 11111111 power on 00000001 treble bass msb lsb min. gain xxxx0 0 0 0 min. gain + 1 xxxx0 0 0 1 power on max. gain C 1 xxxx1 1 1 0 max. gain xxxx1 1 1 1
tda 4350x semiconductor group 12 04.96 2.2.4 talkmode figure 7 af inputs pin 1/2/3/25/26/27/28 msb lsb ci1 ci2 zcs x x x x x ci1 = 0 ci1 = 1 cl 2 = 0 cl2 = 1 zcs = 0 zcs = 1 normal operation input level control output at clipping level normal operation tone control output at clipping level all af outputs are on after zcs set to 0 all af outputs are muted after zcm set to 1
tda 4350x semiconductor group 13 04.96 figure 8 af outputs pin 13/14/15/16 figure 9 mute pin 7, i 2 c bus scl pin 8
tda 4350x semiconductor group 14 04.96 figure 10 i 2 c bus sda pin 9 figure 11 corner frequency treble pin 11/12
tda 4350x semiconductor group 15 04.96 figure 12 loudness pin 4/5/23/24 figure 13 rc network bass pin 17/18/19/20
tda 4350x semiconductor group 16 04.96 figure 14 bias for af operation point pin 22
tda 4350x semiconductor group 17 04.96 3 electrical characteristics 3.1 absolute maximum ratings t a = C 40 c to 85 c parameter symbol limit values unit remarks min. max. supply voltage v 10 014v max. dc voltage v 1 0 v 10 v max. dc voltage v 2 0 v 10 v max. dc voltage v 3 0 v 10 v max. dc voltage v 5 0 v 10 v max. dc voltage v 7 0 v 10 v max. dc voltage v 8 0 v 10 v max. dc voltage v 9 0 v 10 v max. dc voltage v 11 0 v 10 v max. dc voltage v 12 0 v 10 v max. dc voltage v 17 0 v 10 v max. dc voltage v 19 0 v 10 v max. dc voltage v 22 0 v 10 v max. dc voltage v 23 0 v 10 v max. dc voltage v 25 0 v 10 v max. dc voltage v 26 0 v 10 v max. dc voltage v 27 0 v 10 v max. dc voltage v 28 0 v 10 v max. dc current i 4 02ma max. dc current i 13 05ma max. dc current i 14 05ma max. dc current i 15 05ma max. dc current i 16 05ma max. dc current i 18 02ma max. dc current i 20 02ma max. dc current i 24 02ma
tda 4350x semiconductor group 18 04.96 note: maximum ratings are absolute ratings; exceeding only one of these values may cause irreversible damage to the integrated circuit. 3.2 operational range note: in the operating range the functions given in the circuit description are fulfilled. junction temperature t j 150 c storage temperature t g 125 c thermal resistance r thsa 76 k/w esd voltage, hbm v esd1 C 4 4 kv 1.5 k w, 100 pf esd voltage, af outputs v esd2 C 6 6 kv 1.5 k w, 100 pf parameter symbol limit values unit min. max. supply voltage v s 7.5 13.2 v ambient temperature range t a C 40 85 c input frequency range f i 0.01 20 khz 3.1 absolute maximum ratings (contd) t a = C 40 c to 85 c parameter symbol limit values unit remarks min. max.
tda 4350x semiconductor group 19 04.96 3.3 ac/dc characteristics v 10 = 10 v; t a = 25 c parameter symbol limit values unit test condition test circuit min. typ. max. current consumption i 10 45 ma 1 signal section gain g 13-1 0db 1 gain g 14-1 0db 1 analogous values are apply for feeding in on pins 2 and 3. gain g 15-28 0db 1 gain g 16-28 0db 1 analogous values are apply for feeding in on pins 25 and 26. input level control min. gain g 13-1 g 14-1 g 15-28 g 16-28 0db 1 max. gain g 13-1 g 14-1 g 15-28 g 16-28 25 db 01,0a v inp 10 1 stepwidth g 13-1 g 14-1 g 15-28 g 16-28 2.5 db 01,x-01, x 1 v inp x-v inp (x 1) 1 analogous values are apply for feeding in on pins 2, 3, 25 and 26. threshold clipping detector 1 v 1 ci1 v 28 ci1 1.9 vrms 1
tda 4350x semiconductor group 20 04.96 volume control max. gain g 13-1 g 14-1 g 15-28 g 16-28 0db 1 min. gain g 13-1 g 14-1 g 15-28 g 16-28 C 78.25 db 02,00; 03,00 vol. 0; loud. off 1 tracking error d g 13-14 d g 15-16 d g 13-16 d g 14-15 2 db 02,3f-02,24; 03,3f vol. 63-36; loud. off 1 stepwidth d g 13 d g 14 d g 15 d g 16 1.25 db 02,x-02, (x 1) vol. x-vol. (x 1) 1 loudness control max. gain g 4-1 g 24-28 C 6 db 03,7f; 02,00 loud. on 1 min. gain g 4-1 g 24-28 C 84.75 db 03,40; 02,00 loud. 0 1 tracking error d g 5-24 2 db 03,7f-03,64; 02,00 loud. 63-36; loud. on 1 stepwidth d g 4 d g 24 1.25 db 03,x-03, (x 1) loud. x-loud. (x 1) 1 3.3 ac/dc characteristics (contd) v 10 = 10 v; t a = 25 c parameter symbol limit values unit test condition test circuit min. typ. max.
tda 4350x semiconductor group 21 04.96 output control max. gain g 13-1 g 14-1 g 15-28 g 16-28 0db 1 min. gain g 13-1 g 14-1 g 15-28 g 16-28 C 38.75 db 08,00; out 0 07,00; out 0 05,00; out 0 06,00; out 0 1 stepwidth d g 13 d g 14 d g 15 d g 16 1.25 db 08,x-08, (x 1) outx-out (x 1) 07,x-07, (x 1) outx-out (x 1) 05,x-05, (x 1) outx-out (x 1) 06,x-06, (x 1) outx-out (x 1) 1 3.3 ac/dc characteristics (contd) v 10 = 10 v; t a = 25 c parameter symbol limit values unit test condition test circuit min. typ. max.
tda 4350x semiconductor group 22 04.96 bass control bass boost g 13-1 g 14-1 g 15-28 g 16-28 14 16 db 04,80; f 1 = 40 hz bass min, treble lin 1 bass cut g 13-1 g 14-1 g 15-28 g 16-28 C 14 db 04,8f; f 1 = 40 hz bass min, treble lin 1 bass stepwidth d g 13 d g 14 d g 15 d g 16 1 2 3 db 04,8x (x 1) bassx-bass (x 1) 1 treble control treble boost g 13-1 g 14-1 g 15-28 g 16-28 14 16 db 04,80; f 1 = 15 khz treble max, bass lin 1 treble cut g 13-1 g 14-1 g 15-28 g 16-28 C 14 db 04,8f; f 1 = 15 khz treble min, bass lin 1 treble stepwidth d g 13 d g 14 d g 15 d g 16 1 2 3 db 04,8x-04, (x 1) 8 treblex-treble (x 1) 1 tone linearity d g 13 d g 14 d g 15 d g 16 1 2 3 db 04, 88-04, f 1 = 40 hz 15 khz treble, bass lin 1 threshold clipping detector 2 v 1 ci2 v 28 ci2 380 mvrms 04,00 f 1 = 40 hz or 15 khz treble max, bass max 1 3.3 ac/dc characteristics (contd) v 10 = 10 v; t a = 25 c parameter symbol limit values unit test condition test circuit min. typ. max.
tda 4350x semiconductor group 23 04.96 channel separation d g 14-15 d g 13-16 80 db v 1 or v 28 = 300 mvrms 1 analogous values apply for feeding on pins 2, 3, 25 and 26. crosstalk attenuation input switch a in use/out interf. 80 db v i use. = 0 v i interf. = 300 mvrms 1 feed on pins 1-3 and 25, 26, 28, measured on pins 13-16. attenuation mute a 1-13 a 1-14 a 28-15 a 28-16 80 db 02,7f; v 1 = 300 mvrms mute active 00,20; v 1 = 300 mvrms notselect 02,7f; v 28 = 300 mvrms mute active 00,20; v 28 = 300 mvrms notselect 1 max. input voltage v 1 v 28 2 2 vrms vrms thd 13 < 1 % thd 14 < 1 % thd 15 < 1 % thd 16 < 1 % 1 1 max. output voltage v 13 v 14 v 15 v 16 2.2 vrms thd 13 < 1 % 01,07; v inp. 7 thd 14 < 1 % 01,07; v inp. 7 thd 15 < 1 % 01,07; v inp. 7 thd 16 < 1 % 01,07; v inp. 7 1 distortion thd 13 thd 14 thd 15 thd 16 0.01 0.05 % v 1 = 300 mvrms v 28 = 300 mvrms 1 3.3 ac/dc characteristics (contd) v 10 = 10 v; t a = 25 c parameter symbol limit values unit test condition test circuit min. typ. max.
tda 4350x semiconductor group 24 04.96 analog values apply for feeding in on pins 2, 3, 25 and 26. distortion thd 13 thd 14 thd 15 thd 16 0.01 0.1 % v 1 = 300 mvrms 02,2f; 03,6f; vol. 47 v 28 = 300 mvrms 02,2f; 03,6f; vol. 47 1 distortion thd 13 thd 14 thd 15 thd 16 0.05 0.2 % v 1 = 150 mvrms 04,xx any tone setting v 28 = 150 mvrms 04,xx any tone setting 1 unweighted signal/noise ratio a s / n 13 a s / n 14 a s / n 15 a s / n 16 105 db v nrms 20 hz 20 khz v 1 = 2 vrms v nrms 20 hz 20 khz v 28 = 2 vrms 1 unweighted signal/noise ratio a s / n 13 a s / n 14 a s / n 15 a s / n 16 60 db v nrms 20 hz 20 khz v 1 = 0.3 vrms 02,27; 03,67 vol. 39 v nrms 20 hz 20 khz v 28 = 0.3 vrms 02,27; 03,67 vol. 39 1 unweighted noise voltage v n13 v n14 v n15 v n16 20 m vrms v nrms 20 hz 20 khz 02,00; 03,00 vol. 0 1 bridge power-amp f 13-14 180 bit ph = 0 1 modus f 15-16 180 bit ph = 0 1 load resistor r l13, 14 r l15, 16 r l13, 14 r l15, 16 4.5 1.5 k w k w v 13, 14 = 2.5 v; thd < 1 % v 15, 16 = 2.5 v; thd < 1 % bit fan = 1 v 13, 14 = 2.5 v; thd < 1 % bit fan = 1 v 15, 16 = 2.5 v; thd < 1 % 1 1 dc jump d 1 bit d v 13 4 mv sub, x-sub, x 11 3.3 ac/dc characteristics (contd) v 10 = 10 v; t a = 25 c parameter symbol limit values unit test condition test circuit min. typ. max.
tda 4350x semiconductor group 25 04.96 analog values apply for measuring on pins 14, 15 and 16. dc jump d 1 bit d v 13 6 mv 01, 03-01, 04-01, 05-01, 06-01, 07 input level control 1 dc jump d 1 bit d v 13 10 mv 01, 07-01, 08-01, 09-01, 0a-01, 08 input level control 1 psrr power supply ripple rejection a psrr13 a psrr14 a psrr15 a psrr16 70 70 70 70 db db db db v i interf. = 1 vrms f i interf. = 100 hz 20 khz r g = 220 w r g = 220 w measurement ccir 651 effective 1 1 1 1 zero crossing detector window 30 mv 1 mute active v qml 0.3 1.5 v 1 mute inactive v qmh 3 5.5 v 1 input current i qh i ql 50 100 m a m a 1 1 design hints input resistance r 1 r 2 r 3 r 25 r 26 r 28 30 k w output resistance r 13 r 14 r 15 r 16 70 w 3.3 ac/dc characteristics (contd) v 10 = 10 v; t a = 25 c parameter symbol limit values unit test condition test circuit min. typ. max.
tda 4350x semiconductor group 26 04.96 i 2 c bus (scl, sda) scl, sda edges rise time t r 1 m s fall time t f 300 ns shift register clock pulse scl frequency f scl 0 100 khz h pulse width t high 4 m s l pulse width t low 4 m s start set-up time t susta 4 m s hold time t hdsta 4 m s stop set-up time t susto 4 m s bus free time t buf 4 m s data transfer set-up time t sudat 250 ns hold time t hddat 1 m s input scl, sda input voltage v qh v ql 3 5.5 1.5 v1 input current i qh i ql 350 100 m a m a 1 3.3 ac/dc characteristics (contd) v 10 = 10 v; t a = 25 c parameter symbol limit values unit test condition test circuit min. typ. max.
tda 4350x semiconductor group 27 04.96 note: the listed characteristics are ensured over the operating range of the integrated circuit. typical characteristics specify mean values expected over the production spread. if not otherwise specified, typical characteristics apply at t a = 25 c and the given supply voltage. output sda (open collector) output voltage v qh v ql 5.5 0.4 v r l = 2.5 k w i ql = 3 ma 1 3.3 ac/dc characteristics (contd) v 10 = 10 v; t a = 25 c parameter symbol limit values unit test condition test circuit min. typ. max.
tda 4350x semiconductor group 28 04.96 figure 15 test circuit
tda 4350x semiconductor group 29 04.96 application circuit 1 figure 16 bass loudness circuitry and bass control resonance characteristic
tda 4350x semiconductor group 30 04.96 application circuit 2 figure 17 bass/treble loudness circuitry and 1. order bass control characteristic
tda 4350x semiconductor group 31 04.96 diagram figure 18 i 2 c bus timing
tda 4350x semiconductor group 32 04.96 4 package outlines p-dso-28-1 (plastic dual small outline package) gps05123 sorts of packing package outlines for tubes, trays etc. are contained in our data book package information. dimensions in mm smd = surface mounted device

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