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june 2011 doc id 9837 rev 2 1/37 1 tda7416 car radio signal processor features 3 stereo inputs 1 pseudo differential stereo input volume control 7 band equalizer filter control high-pass filter for subwoofer application d i r e c t m u t e a n d s o f t m u t e 4 independent speaker outputs soft-step speaker control subwoofer output with soft step 7 band spectrum analyzer full mixing capability hpf2 with zerocross i 2 c bus interface description the device includes a high performance audio processor with 7 bands equalizer and spectrum analyzer. the digital control allows a programming in a wide range of all the filter characteristics. table 1. device summary order code package packing e-tda7416 tqfp44 tray '!0'03 tqfp44 www.st.com
contents tda7416 2/37 doc id 9837 rev 2 contents 1 block diagram . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6 2 pins connection . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7 3 electrical specifications . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8 3.1 supply . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8 3.2 thermal data . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8 3.3 absolute maximum ratings . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8 3.4 esd . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8 3.5 electrical characteristics . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9 4 description of the audi o processor part . . . . . . . . . . . . . . . . . . . . . . . . 13 4.1 audio processor features . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 13 4.2 input stages . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 14 4.2.1 pseudo-differential stereo input (in1) . . . . . . . . . . . . . . . . . . . . . . . . . . 14 4.2.2 single-ended stereo inputs . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 15 4.3 autozero . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 15 4.3.1 autozero remain . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 15 4.4 loudness . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 15 4.4.1 attenuation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 15 4.4.2 peak frequency . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 16 4.4.3 loudness filter order . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 16 4.4.4 flat mode . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 16 4.5 soft-mute . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 17 4.6 soft-step volume and speaker . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 17 4.7 equalizer filter . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 18 4.7.1 attenuation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 18 4.7.2 center frequency . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 18 4.7.3 quality factors . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 19 4.7.4 superposition of all equalizer filters . . . . . . . . . . . . . . . . . . . . . . . . . . . . 19 4.7.5 dc-mode of equalizer band 1 (62/100 hz) . . . . . . . . . . . . . . . . . . . . . . 20 4.8 subwoofer application . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 20 4.9 spectrum analyzer . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 21
tda7416 contents doc id 9837 rev 2 3/37 4.10 ac coupling . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 22 4.11 front speaker attenuator and mixing . . . . . . . . . . . . . . . . . . . . . . . . . . . . 22 4.12 audio processor testing . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 23 4.13 application diagram . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 23 5 i2c bus interface . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 24 5.1 interface protocol . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 24 5.1.1 auto increment . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 24 5.1.2 transmitted data (send mode) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 24 5.1.3 reset condition . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 25 5.2 subaddress (receive mode) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 25 5.3 data byte specification . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 26 5.3.1 input selector (0) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 26 5.3.2 loudness (1) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 26 5.3.3 volume (2) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 27 5.3.4 equalizer (3,4,5,6,7,8,9) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 28 5.3.5 mixing programming (10) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 29 5.3.6 soft-mute and hpf2 (11) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 30 5.3.7 subwoofer configuration / spectrum analyzer / high-pass (12) . . . . . . . 31 5.3.8 configuration audio processor i (13) . . . . . . . . . . . . . . . . . . . . . . . . . . . 32 5.3.9 mixer level control (14) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 33 5.3.10 speaker and subwoofer level control (15,16,17,18,19) . . . . . . . . . . . . . 33 5.3.11 testing audio processor (20) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 34 6 package information . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 35 7 revision history . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 36
list of tables tda7416 4/37 doc id 9837 rev 2 list of tables table 1. device summary . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1 table 2. supply . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8 table 3. thermal data. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8 table 4. absolute maximum ratings . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8 table 5. electrical characteristics . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9 table 6. subaddress (receive mode) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 25 table 7. input selector (0) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 26 table 8. loudness (1) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 26 table 9. volume (2) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 27 table 10. equalizer (3,4,5,6,7,8,9) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 28 table 11. mixing programming (10) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 29 table 12. soft-mute and hpf2 (11) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 30 table 13. subwoofer configuration / spectrum analyzer / high-pass (12). . . . . . . . . . . . . . . . . . . . . . 31 table 14. configuration audio processor i (13) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 32 table 15. mixer level control (14) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 33 table 16. speaker and subwoofer level control (15,16,17,18,19) . . . . . . . . . . . . . . . . . . . . . . . . . . . 33 table 17. testing audio processor (20) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 34 table 18. document revision history . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 36
tda7416 list of figures doc id 9837 rev 2 5/37 list of figures figure 1. block diagram . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6 figure 2. pins connection (top view) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7 figure 3. input stages . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 14 figure 4. loudness attenuation @ fp = 400 hz . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 15 figure 5. loudness center frequencies @ attn. = 15 db . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 16 figure 6. 1 st and 2 nd order loudness @ attn. = 15 db, f p = 400 hz. . . . . . . . . . . . . . . . . . . . . . . . . . 16 figure 7. soft-mute timing . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 17 figure 8. soft-step timing for volume . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 17 figure 9. equalizer filter control @ fcenter = 1khz, q = 1.0 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 18 figure 10. center frequencies @ gain = 15db, q = 1.0 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 18 figure 11. quality factors @ boost = 15db, fcenter = 1khz . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 19 figure 12. superposition of all eq bands @ boost = 15db . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 19 figure 13. eq band1, normal- and dc-mode @ boost = 15 db, fcenter = 62 hz. . . . . . . . . . . . . . . . 20 figure 14. subwoofer application with low-pass @ 80/120/160hz and high-pass @ 90/135/180hz . 20 figure 15. spectrum analyzer block diagram . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 21 figure 16. timing spectrum analyzer. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 21 figure 17. ac/dc coupling . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 22 figure 18. output selector . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 22 figure 19. application diagram . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 23 figure 20. interface protocol . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 24 figure 21. tqfp44 mechanical data and package dimensions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 35
block diagram tda7416 6/37 doc id 9837 rev 2 1 block diagram figure 1. block diagram '!0'03 -ain 3elector ). 'ain 0ower ,oudness 3pectrum !nalizer 3oft-ute ss 2ear 3elector ).054 -ain6olume band%qualizer )#"us (0& (0& -ixer /54,& &),/2 !#).2 !#/542 &),/, !#)., !#).2 !#/542 !#)., !#/54, !#).37 !#/5437 #,+ 3$! 62%&/54 6$$ #2%& '.$ -54% 3!#,+ 3!/54 !#/54, /542& /54,2 /5422 /537 -ixer &ader (0& 3ubwoofer ss &ader ss &ader :ero#ross ss &ader ss &ader ss &ader ss3oft3tep -)8 ).2 )., ).2 )., ).2 )., ). ).2 ).,
tda7416 pins connection doc id 9837 rev 2 7/37 2 pins connection figure 2. pins connection (top view) .# .# !582 0$, 0$ .# 0$2 -)8 .# '.$ .# 3$! 3#, 3!). -54% 3!/54 /5437 &),/2 !#/54 !#).2 /5422 /52& .# !#/542 !#).37 !#/5437 #ref .# !-, !-2 -$, -$2 !58, .# /54,2 /54,& &),/, !#/54, !#)., 6$$ 62%&/54 !#)., !#/54, !#).2 '!0'03
electrical specifications tda7416 8/37 doc id 9837 rev 2 3 electrical specifications 3.1 supply 3.2 thermal data 3.3 absolute maximum ratings 3.4 esd all pins are protected against esd according to the mil883 standard. table 2. supply symbol parameter test conditions min. typ. max. unit v s supply voltage 7.5 9 10 v i s supply current v s = 9 v 35 45 55 ma svrr ripple rejection @ 1khz audio processor (all filters flat) - 60 - db table 3. thermal data symbol description value unit r th j-pins thermal resistance junction-to-pins max 65 c/w table 4. absolute maximum ratings symbol parameter value unit v s operating supply voltage 10.5 v t amb operating temperature range -40 to 85 c t stg storage temperature range -55 to +150 c
tda7416 electrical specifications doc id 9837 rev 2 9/37 3.5 electrical characteristics v s = 9 v; t amb = 25 c; r l = 10 k ; all gains = 0 db; f = 1 khz; unless otherwise specified. table 5. electrical characteristics symbol parameter test condition min. typ. max. unit input selector r in input resistance all single-ended inputs 70 100 130 k v cl clipping level - 1.8 2.2 v rms s in input separation - 80 100 db g in min min. input gain - -1 0 1 db g in max max. input gain - 13 15 17 db g step step resolution - 0.5 1 1.5 db v dc dc steps adjacent gain steps -5 1 5 mv g min to g max -10 1 10 mv v offset remaining offset with autozero - - 0.5 - mv differential stereo inputs r in input resistance (see figure 3 ) differential 70 100 130 k cmrr common mode rejection ratio v cm = 1 v rms @ 1 khz 46 70 - db v cm = 1 v rms @ 10 khz 46 60 - db e no output-noise @ speaker-outputs 20hz - 20khz, flat; all stages 0db - 11 - v mixing control m level mixing ratio main / mix-source - -6/-6 - db g max max. gain - 13 15 17 db a max max. attenuation - -83 -79 -75 db a step attenuation step - 0.5 1 1.5 db loudness control a step step resolution - 0.5 1 1.5 db a max max. attenuation - -21 -19 -17 db f peak peak frequency f p1 180 200 220 hz f p2 360 400 440 hz f p3 540 600 660 hz f p4 720 800 880 hz volume control g max max. gain - 18 20 22 db a max max. attenuation - -83 -79 -75 db a step step resolution - 0 0.5 1 db
electrical specifications tda7416 10/37 doc id 9837 rev 2 e a attenuation set error g = -20 to +20 db -0.75 0 +0.75 db g = -80 to -20 db -4 0 3 db e t tracking error - - - 2 db v dc dc steps adjacent attenuation steps - 0.1 3 mv from 0db to g min -0.55mv soft-mute a mute mute attenuation - 80 100 - db t d delay time t1 - 0.48 1 ms t2 - 0.96 2 ms t3 70 123 170 ms v th low low threshold for sm-pin 1) ---1v v th high high threshold for sm - pin - 2.5 - - v r pu internal pull-up resistor - 32 45 58 k v pu internal pull-up voltage - - 3.3 - v equalizer control c range control range - + 14 + 15 + 16 db a step step resolution - 0.5 1 1.5 db f c1 center frequency band 1 f c1a 55 62 69 hz f c1b 90 100 110 hz f c2 center frequency band 2 f c2 141 157 173 hz f c3 center frequency band 3 f c3 365 396 437 hz f c4 center frequency band 4 f c4 0.911.1khz f c5 center frequency band 5 f c5 2.25 2.51 2.76 khz f c6 center frequency band 6 f c6a 3.644.4khz f c6b 5.70 6.34 6.98 khz f c7 center frequency band 7 f c7a 13.5 15 16.5 khz f c7b 14.4 16 17.6 khz q quality factor q 1 0.911.1 q 2 1.26 1.4 1.54 q 3 1.62 1.8 1.98 q 4 1.98 2.2 2.44 dc gain dc-gain, band 1 dc = off -1 0 +1 db dc = on, 15db boost 4 db table 5. electrical characteristics (continued) symbol parameter test condition min. typ. max. unit
tda7416 electrical specifications doc id 9837 rev 2 11/37 spectrum analyzer control v saout output voltage range - 0 3.3 v f c1 center frequency band 1 f c1 55 62 69 hz f c2 center frequency band 2 f c2 141 157 173 hz f c3 center frequency band 3 f c3 356 396 436 hz f c4 center frequency band 4 f c4 0.911.1khz f c5 center frequency band 5 f c5 2.26 2.51 2.76 khz f c6 center frequency band 6 f c6 5.70 6.34 6.98 khz f c7 center frequency band 7 f c7 14.4 16 17.6 khz q quality factor q 1 1.62 1.8 1.98 q 2 3.15 3.5 3.85 f saclk clock frequency - 1 - 100 khz t sadel analog output delay time - 2 - - s t repeat spectrum analyzer repeat time - 50 - - ms t intres internal reset time - - 3 - ms hpf2 v th zero crossing threshold - - 20 - mv e max max. effect - - 22 - db e min min. effect - - 4 - db e step step resolution - 1.5 2 2.5 db speaker attenuators r in input impedance - 35 50 65 k g max max. gain - 13 15 17 db a max max. attenuation - -83 -79 -75 db a step step resolution - 0.5 1 1.5 db a mute output mute attenuation - 80 90 - db e e attenuation set error - - - 3 db v dc dc steps adjacent attenuation steps - 0.5 5 mv m r mixing ratio signal/mix in - 50/50 - % audio outputs v clip clipping level thd=0.3% 1.8 2.2 - v rms r l output load re sistance - 2 - - k c l output load capacitance - - - 10 nf r out output impedance - - 30 120 w table 5. electrical characteristics (continued) symbol parameter test condition min. typ. max. unit
electrical specifications tda7416 12/37 doc id 9837 rev 2 v dc dc voltage level - 4.3 4.5 4.7 v high-pass f hp high-pass corner frequency f hp1 81 90 99 hz f hp2 122 135 148 hz f hp3 162 180 198 hz f hp4 194 215 236 hz subwoofer attenuator r in input impedance - 35 50 65 k g max max. gain - 14 15 16 db a at t n max. attenuation - -83 -79 -75 db a step step resolution - 0.5 1 1.5 db a mute output mute attenuation - 80 90 - db e e attenuation set error - - 2 db v dc dc steps adjacent attenuation steps - 1 5 mv subwoofer low-pass f lp low-pass corner frequency f lp1 72 80 88 hz f lp2 108 120 132 hz f lp3 144 160 176 hz general e no output noise bw = 20 hz - 20 khz output muted - 315v bw = 20 hz - 20 khz all gains = 0db single-ended inputs - 15 20 v v s/n signal-to-noise ratio all gains = 0 db flat; v o = 2 v rms -103- db all eq-bands at +12db; q = 1.0 a-weighted; v o = 2.6v rms -87-db d distortion v in = 1v rms ; all stages 0db - 0.01 0.1 % v out = 1v rms ; bass & treble = 12db -0.050.1% s c channel separation left/right - 80 90 - db table 5. electrical characteristics (continued) symbol parameter test condition min. typ. max. unit
tda7416 description of the audio processor part doc id 9837 rev 2 13/37 4 description of the audio processor part 4.1 audio processor features input multiplexer ? 1 pseudo differential cdc stereo input, programmable as single-ended input ? 3 single-ended stereo inputs ? input gain adjust 0 to 15 db with 1 db steps ?direct mute ? internal offset-cancellation (autozero) mixing stage ? mixable mix input to front speaker outputs ? input controls +15 to -79 db with 1 db steps ?direct mute ? loudness ? programmable center frequency and filter slope ? 19 db with 1db steps ? selectable flat-mode (constant attenuation) volume ? +32 to -79.5 db with 0.5 db step resolution ? soft-step control with programmable blend times ? 100 db range equalizer ? seven bands ?2 nd order frequency response ? center frequency programmable for lowest and highest filter ? programmable quality factor in four steps for each filter ? -15 to 15 db range with 1db resolution spectrum analyzer ? seven bandpass filters ?2 nd order frequency response ? programmable quality factor for different visual appearance ? analog output ? controlled by external serial clock high-pass ?2 nd order butterworth high-pass with programmable cut-off frequency ? selectable flat-mode speaker ? 4 independent soft-step speaker controls, +15 to -79 db with 1 db steps ?mute ? 4 independent programmable mix inputs with 50% mixing ratio subwoofer
description of the audio processor part tda7416 14/37 doc id 9837 rev 2 ? single-ended monaural output independent soft-step level control +15 to -79 db with 1 db steps mute functions ?direct mute ? digitally controlled soft-mute with 3 programmable mute-times effect ? gain effect or high-pass effect fixed external components 4.2 input stages in the basic configuration one pseudo-differential, three single-ended stereo are available. figure 3. input stages 4.2.1 pseudo-differential stereo input (in1) the in1- input is implemented as a buffered pseudo-differential stereo stage with 100 k input-impedance at each input pin. this input is also configurable as single-ended stereo input. the common input-pin, in1- features a fast charge switch to speed up the charge time of external capacitors. this switch is released the first time the input-selector data-byte (0) is accessed. '!0'03 6ref 6ref 6ref 6ref 6ref 6ref 6ref ). ). ). ). ). )n'ain &ader 3tereo 0seudo differential -ain3elector -u te 2ear3elector -u te ). ). ). ). ). ). ). ).
tda7416 description of the audio processor part doc id 9837 rev 2 15/37 4.2.2 single-ended stereo inputs all single-ended inputs have an input impedance of 100 k . 4.3 autozero the autozero allows a reduction of the number of pins as well as external components by canceling any offset generated by or before the in-gain-stage (please notice that externally generated offsets, e.g. generated through the leakage current of the coupling capacitors, are not canceled). the auto-zeroing is started every time the data-byte 0 is selected and needs max. 0.3 ms for the alignment. to avoid audible clicks the audioprocessor have to be muted by soft-mute or hard-mute during this time. 4.3.1 autozero remain in some cases, for example if the p is executing a refresh cycle of the iic-bus- programming, it is not useful to start a ne w autozero action because no new source is selected and an undesired mute would appear at the out-puts. for such applications the tda7416 could be switched in the autozero remain-mode (bit 6(i1) of the subaddress- byte). if this bit is set to high, the databyte 0 could be loaded without invoking the autozero and the old adjustment-value remains. 4.4 loudness there are four parameters programmable in the loudness stage. 4.4.1 attenuation figure 4 shows the attenuation as a function of frequency at f p = 400 hz figure 4. loudness attenuation @ f p = 400 hz '!0'03 d" (z + +
description of the audio processor part tda7416 16/37 doc id 9837 rev 2 4.4.2 peak frequency figure 5 shows the four possible peak-frequencies at 200, 400, 600 and 800hz figure 5. loudness center frequencies @ attn. = 15 db 4.4.3 loudness filter order different shapes of 1 st and 2 nd -order loudness figure 6. 1 st and 2 nd order loudness @ attn. = 15 db, f p = 400 hz 4.4.4 flat mode in flat mode the loudness stage works as a 0db to -19db attenuator. '!0'03 d" (z + + '!0'03 d" (z + +
tda7416 description of the audio processor part doc id 9837 rev 2 17/37 4.5 soft-mute the digitally controlled soft-mute stage allows muting/demuting the signal with a i 2 c bus programmable slope. the mute process can either be activated by the soft-mute pin or by the i 2 c bus. this slope is realized in a special s-shaped curve to mute slow in the critical regions (see figure 7 ). for timing purposes the bit0 of the i 2 c bus output register is set to 1 from the start of muting until the end of de-muting. figure 7. soft-mute timing 1. please notice that a started mute-action is always terminated and could not be interrupted by a change of the mute -signal. 4.6 soft-step volume and speaker when the speaker-level is changed audible clicks could appear at the output. the root cause of those clicks could either be a dc-offset before the speaker-stage or the sudden change of the envelope of the audio signal. with the soft-step feature both kinds of clicks could be reduced to a minimum and are no more audible. the blend-time from one step to the next is programmable in four steps. figure 8. soft-step timing for volume 1. for steps more than 0.5db (volume) or 1db (spea ker) the soft-step mode should be deactivated because it could generate a hard 1db step during blending. '!0'03 '!0'03 d" d" d" d" 334 ime
description of the audio processor part tda7416 18/37 doc id 9837 rev 2 4.7 equalizer filter there are three parameters programmable in the equalizer filter: 4.7.1 attenuation figure 9 shows the boost and cut response as a func tion of frequency at a center frequency of 1khz. figure 9. equalizer filter control @ f center = 1khz, q = 1.0 4.7.2 center frequency this parameter is programmable in the filter stage 1(62/100hz), 6(4/6.34khz) and 7(15/16khz) only. figure 10 shows the center frequencies 62, 156, 396, 1000, 2510, 6340 and 15000 hz of the 7 equalizer filters. figure 10. center frequencies @ gain = 15db, q = 1.0 '!0'03 k k (z d" k '!0'03 k k (z d"
tda7416 description of the audio processor part doc id 9837 rev 2 19/37 4.7.3 quality factors figure 11 shows the four possible quality factors 1, 1.4, 1.8 and 2.2 figure 11. quality factors @ boost = 15db, f center = 1khz 4.7.4 superposition of all equalizer filters figure 12 shows the superposition of all equalizer filter curves for different quality factors. the gain for all filters is +15db. figure 12. superposition of all eq bands @ boost = 15db '!0'03 k k (z d" '!0'03 k k (z d"
description of the audio processor part tda7416 20/37 doc id 9837 rev 2 4.7.5 dc-mode of equalize r band 1 (62/100 hz) in this mode, the dc-gain 4db when set to 15db boost. figure 13. eq band1, normal- and dc-mode @ boost = 15 db, f center = 62 hz 1. the center frequency, q, dc-mode and boost/cut can be set fully independently for each filter. 4.8 subwoofer application figure 14. subwoofer application with low-pass @ 80/120/160hz and high-pass @ 90/135/180hz both filters, the low-pass as well as the high-pass filter, have butterworth characteristic so that their cut-off frequencies are not equal but shifted by the factor 1.125 to get a flat frequency response. '!0'03 + + (z d" '!0'03 d" (z + +
tda7416 description of the audio processor part doc id 9837 rev 2 21/37 4.9 spectrum analyzer a fully integrated seven band spectrum analyzer with programmable quality factor is present in the tda7416 ( figure 15 ). the spectrum analyzer consists of seven band pass filters with rectifier and sample capacitor which stores the ma ximum peak signal level since the last read cycle. this peak signal level can be read by a microprocessor at the saout-pin. to allow easy interfacing to an analog port of the microprocessor, the output voltage at this pin is referred to device ground. the microprocessor starts a read cycle with the negative going clock edge at the saclk input. on the following positive clock edges, the peak signal level for the band pass filters is subsequently switched to saout. each analog output data is valid after the time t sadel . a reset of the sample capacitors is in duced whenever saclk remains high for the time t intres . note that a proper reset requires the clock signal saclk to be held at high potential. figure 15 shows the block diagram and figure 16 illustrates the read cycle timing of the spectrum analyzer. figure 15. spectrum analyzer block diagram figure 16. timing spectrum analyzer '!0'03 '!0'03
description of the audio processor part tda7416 22/37 doc id 9837 rev 2 4.10 ac coupling in some applications additional signal manipulations are desired. for this purpose an ac- coupling is placed before the speaker (fader)-attenuators, which can be activated or internally shorted by i 2 c bus. in short condition the input-signal of the speaker-attenuator is available at the ac-outputs. the input-impedance of this ac-inputs is 50k. in addition there are mix inputs available. with this inputs it is possible to mix an external signal to every speaker with a mixing ratio of 50% (see figure 16 ). the source of front and rear speaker can be set independently. as source is choosable: internal dc coupling (not recommended) external ac coupling using acin pins figure 17. ac/dc coupling 4.11 front speaker attenuator and mixing a mixing-stage is placed after front speaker- attenuator and can be set independently to mixing-mode. having a full volume for the mix- signal the stage offers a wide flexibility to adapt the mixing levels. figure 18. output selector '!0'03 6ref 6r ef leftchannel rightchannel 37in !#in, !#out, 37out &ront&ader 2ear &ader 3ubwoofer &ader 2earselector (ighpass ,o wpass fr flat fr flat '!0'03 &ront &rom-) 8in /ut& 6olume d" d"step 6olume d" d"step (ighpass k k
tda7416 description of the audio processor part doc id 9837 rev 2 23/37 4.12 audio processor testing during the test mode, which can be activated by setting bit i 2 of the subaddress byte and d 0 of the audioprocessor testing byte, several internal signals are available at the mix pin. during this mode the input resistance of 100 kohm is disconnected from the pin. the internal signals available are shown in the data-byte specification. 4.13 application diagram figure 19. application diagram )., )., ).2 )., ).2 !#out37 !#out2 !#out, 62%&out ). 2 )., )., ).2 -)8 3$! 3#, 3!#,+ 3-ute 3!/ut 37/ut /ut,2 /ut2& /ut22 /ut,& &) ,/2 !#)n2 !#/ut2 &),/, !#)n, !#/ut, 63 '!0'03
i2c bus interface tda7416 24/37 doc id 9837 rev 2 5 i 2 c bus interface 5.1 interface protocol the interface protocol comprises: ? a start condition (s) ? a chip address byte (the lsb bit determines read / write transmission) ? a subaddress byte ? a sequence of data (n-bytes + acknowledge) ? a stop condition (p) figure 20. interface protocol s = start r/w = ?0? -> receive-mode (chip could be programmed by p) ?1? -> transmission-mode (data could be received by p) ack = acknowledge p = stop max clock speed 500kbits/s 5.1.1 auto increment if bit i in the subaddress byte is set to ?1?, the auto increment of the subaddress is enabled. 5.1.2 transmitted data (send mode) sm = soft-mute activated x = not used the transmitted data is automatically updated after each ack. transmission can be repeated without new chip address. '!0'03 #()0!$$2%33 35"!$$2%33 $!4!$!4!n -3" ,3" -3" ,3" -3" ,3" 327!#+4!:) !!!!!!#+ $!4! !#+ 0 msb lsb xxx x x x xsm
tda7416 i2c bus interface doc id 9837 rev 2 25/37 5.1.3 reset condition a power-on-reset is invoked if the supply volta ge is below than 3.5v. after that, the following data is written automatically into the registers of all subaddresses: the programming after por is marked bold-face / underlined in the programming tables. with this programming all the outputs are muted to v ref (v out = v dd /2). 5.2 subaddress (receive mode) msb lsb 1111 1 1 1 0 table 6. subaddress (receive mode) 1msb lsb function i 2 i 1 i 0 a 4 a 3 a 2 a 1 a 0 0 1 audio processor testmode off on 0 1 autozero remain off on 0 1 auto-increment mode off on 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 1 1 1 1 1 0 0 0 0 1 0 0 0 1 1 1 1 1 1 1 1 0 0 0 0 0 0 0 0 0 1 1 1 1 0 0 0 0 1 1 1 1 0 0 0 0 1 0 0 1 1 0 0 1 1 0 0 1 1 0 0 1 1 0 0 1 1 0 0 1 0 1 0 1 0 1 0 1 0 1 0 1 0 1 0 1 0 1 0 subaddress source selector loudness volume eq filter 1 (62/100hz) eq filter 2 (157hz) eq filter 3 (396hz) eq filter 4 (1khz) eq filter 5 (2.51khz) eq filter 6 (4/6.34khz) eq filter 7 (15/16khz) mixing programming soft-mute subwoofer / spectrum analyzer / high-pass configuration audio processor i mixing level control speaker attenuator lf speaker attenuator rf speaker attenuator lr speaker attenuator rr subwoofer attenuator testing audio processor
i2c bus interface tda7416 26/37 doc id 9837 rev 2 5.3 data byte specification the status after power-on-reset is marked bold-face / underlined in the programming tables. 5.3.1 input selector (0) 5.3.2 loudness (1) table 7. input selector (0) msb lsb function d 7 d 6 d 5 d 4 d 3 d 2 d 1 d 0 x x x x 0 0 1 1 0 1 0 1 source selector bus/pd aux md am/fm 0 0 : 1 1 0 0 : 1 1 0 0 : 1 1 0 1 : 0 1 input gain 0db 1db : 14db 15db 0 1 mute off on table 8. loudness (1) msb lsb function d 7 d 6 d 5 d 4 d 3 d 2 d 1 d 0 0 0 : 0 0 : 1 : 0 0 : 1 1 : 0 : 0 0 : 1 1 : 0 : 0 0 : 1 1 : 1 : 0 1 : 0 1 : 1 : attenuation 0 db -1 db : -14 db -15 db : -19 db not allowed 0 0 1 1 0 1 0 1 center frequency 200hz 400hz 600hz 800hz 0 1 loudness order first order second order
tda7416 i2c bus interface doc id 9837 rev 2 27/37 5.3.3 volume (2) note: it is not recommended to use a gain more than 20db for system performance reason. in general, the max. gain should be limited by software to the ma ximum value, which is needed for the system. table 9. volume (2) msb lsb function d 7 d 6 d 5 d 4 d 3 d 2 d 1 d 0 0 0 : 0 0 0 : 0 0 0 : 1 1 0 0 : 0 0 0 : 0 1 1 : 1 1 0 0 : 0 0 0 : 1 0 0 : x x 0 0 : 1 1 1 : 1 0 0 : 1 1 0 0 : 1 1 1 : 1 0 0 : 1 1 0 0 : 0 0 0 : 1 0 0 : 1 1 0 0 : 0 0 1 : 1 0 0 : 1 1 0 1 : 0 1 0 : 1 0 1 : 0 1 gain/attenuation (+32.0db) (+31.5db) : +20.0db +19.5db +19.0db : +0.5db 0.0db -0.5db : -79.0db -79.5db
i2c bus interface tda7416 28/37 doc id 9837 rev 2 5.3.4 equalizer (3,4,5,6,7,8,9) table 10. equalizer (3,4,5,6,7,8,9) msb lsb function d 7 d 6 d 5 d 4 d 3 d 2 d 1 d 0 0 0 : 0 0 1 1 : 1 1 0 0 : 1 1 1 1 : 0 0 0 0 : 1 1 1 1 : 0 0 0 0 : 1 1 1 1 : 0 0 0 1 : 0 1 1 0 : 1 0 equalizer cut/boost level -15db -14db : -1db 0db 0db +1db : +14db +15db 0 0 1 1 0 1 0 1 equalizer q-factor 2.2 1.8 1.4 1.0 0 1 equalizer center frequency (only subaddresses 3,8,9) 62hz(addr 3)/4khz(addr 8)/15khz(addr 9) 100hz(addr 3)/6.24khz(a ddr 8)/16khz(addr 9) 0 1 dc mode eq band 1 (62/100 hz, subaddress. 4!) on off
tda7416 i2c bus interface doc id 9837 rev 2 29/37 5.3.5 mixing programming (10) table 11. mixing programming (10) msb lsb function d 7 d 6 d 5 d 4 d 3 d 2 d 1 d 0 0 1 mixing mute enable 0 0 1 1 0 1 0 1 rear source selector bus?(pd) aux md am/fm 0 1 0 1 mixing target speaker lf off speaker lf on speaker rf off speaker rf on 0 1 x x zerocross on hpf2 on off 0 1 spectrum analyzer detect point after eq before eq
i2c bus interface tda7416 30/37 doc id 9837 rev 2 5.3.6 soft-mute and hpf2 (11) note: it is recommended to set d3(filter available or not) during initial mute. table 12. soft-mute and hpf2 (11) msb lsb function d 7 d 6 d 5 d 4 d 3 d 2 d 1 d 0 0 1 soft-mute on (mute) off 0 0 1 0 1 x soft-mute time mute time = 0.48ms mute time = 0.96ms mute time = 123ms 0 1 secondary high-pass enable filter available no filter (gain) 0 0 0 0 0 0 0 0 1 1 1 0 0 0 0 1 1 1 1 x x x 0 0 1 1 0 0 1 1 x 0 1 0 1 0 1 0 1 0 1 0 1 1 secondary high-pass ef fect (with zerocross) 4 db 6 db 8 db 10 db 12 db 14 db 16 db 18db 20db 22db 0db
tda7416 i2c bus interface doc id 9837 rev 2 31/37 5.3.7 subwoofer configuration / spectrum analyzer / high-pass (12) table 13. subwoofer configuration / spectrum analyzer / high-pass (12) msb lsb function d 7 d 6 d 5 d 4 d 3 d 2 d 1 d 0 0 0 1 1 0 1 0 1 subwoofer filter off 80hz 120hz 160hz x x 0 1 subwoofer coupling ac using sw in pin dc 0 1 spectrum analyzer q-factor 3.5 1.8 0 1 high-pass enable filter off filter on 0 0 1 1 0 1 0 1 high-pass cut-off frequenc y 90hz 135hz 180hz 225hz
i2c bus interface tda7416 32/37 doc id 9837 rev 2 5.3.8 configuration audio processor i (13) table 14. configuration audio processor i (13) msb lsb function d 7 d 6 d 5 d 4 d 3 d 2 d 1 d 0 0 1 pd input mode single ended pseudo differential 0 1 pd input gain -6 db 0 db 0 1 soft-step volume off on 0 0 1 1 0 1 0 1 soft-step time 320s 1.28ms 5.12ms 20.4ms 0 1 loudness flat filter on 0 1 front ac speaker ac coupling (acin) dc coupling 0 1 rear effect no effect signal equalizing signal
tda7416 i2c bus interface doc id 9837 rev 2 33/37 5.3.9 mixer level control (14) 5.3.10 speaker and subwoofer level control (15,16,17,18,19) ) table 15. mixer level control (14) msb lsb function d 7 d 6 d 5 d 4 d 3 d 2 d 1 d 0 1 1 1 0 0 : 0 0 : 0 0 x 0 : 0 0 0 0 : 0 0 : 1 1 1 0 : 0 0 0 0 : 0 0 : 0 0 1 0 : 0 0 0 0 : 0 1 : 0 0 x 1 : 0 0 0 0 : 1 0 : 1 1 x 1 : 0 0 0 0 : 1 0 : 1 1 x 1 : 0 0 0 0 : 1 0 : 1 1 x 1 : 1 0 0 1 : 1 0 : 0 1 x gain/attenuation +15db : + 1db 0db 0db - 1db : -15db -16db : -78db -79db mute table 16. speaker and subwoofer level control (15,16,17,18,19) msb lsb function d 7 d 6 d 5 d 4 d 3 d 2 d 1 d 0 0 : 0 0 0 0 : 0 : 0 : 1 : 1 : 1 1 0 : 0 0 0 0 : 1 : 1 : 0 : 0 : 0 1 0 : 0 0 1 1 : 0 : 1 : 0 : 1 : 1 x 1 : 0 0 0 0 : 0 : 0 : 0 : 0 : 1 x 1 : 0 0 0 0 : 0 : 0 : 0 : 0 : 1 x 1 : 0 0 0 0 : 0 : 0 : 0 : 0 : 1 x 1 : 1 0 0 1 : 0 : 0 : 0 : 0 : 1 x gain/attenuation +15db : + 1db 0db 0db - 1db : -16db : -32db : -48db : -64db -79db mute 0 1 soft-step on/off on off
i2c bus interface tda7416 34/37 doc id 9837 rev 2 5.3.11 testing audio processor (20) note: this byte is used for testing or evaluation purposes only and must not set to other values than ? 11111110 ? in the application! table 17. testing audio processor (20) msb lsb function d 7 d 6 d 5 d 4 d 3 d 2 d 1 d 0 0 1 audio processor test-mode off on 0 1 0 1 0 1 x 0 1 x x x 0 0 0 0 0 0 0 1 1 1 1 1 0 0 0 0 1 1 1 0 0 0 1 1 0 0 1 1 0 0 1 0 0 1 0 1 test-multiplexer spectrum analyzer filter 62hz spectrum analyzer filter 157hz spectrum analyzer filter 396hz spectrum analyzer filter 1khz spectrum analyzer filter 2.51khz spectrum analyzer filter 6.34khz spectrum analyzer filter 16khz switch-ron measurement setup (level input) not used 200khz oscillator nb-hold internal reference 0 1 clock external internal 0 1 az function off on 0 1 sc-clock fast mode normal mode
tda7416 package information doc id 9837 rev 2 35/37 6 package information in order to meet environmental requirements, st offers these devices in different grades of ecopack ? packages, depending on their level of environmental compliance. ecopack ? specifications, grade definitions and product status are available at: www.st.com . ecopack ? is an st trademark. figure 21. tqfp44 mechanical data and package dimensions /54,).%!.$ -%#(!.)#!,$!4 ! $)- mm inch -). 490 -!8 -). 490 -!8 ! ! ! " # $ $ $ % % % e , , k ?min ?typ ?max 41&0xxmm ! ! ! " 3eating0lane # % % $ $ e + " 41&0 , mm $ '!0'03
revision history tda7416 36/37 doc id 9837 rev 2 7 revision history table 18. document revision history date revision changes 20-sep-2003 1 initial release. 30-jun-2011 2 document reformatted. updated order code in the table 1: device summary on page 1 .
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