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mo sa ms6714 4 stereo inputs / 1 stereo output audio processor rev 3 1/18 www.mosanalog.com 4 stereo inputs and 1 stereo output volume, tone, balance, loudness and selectable input gain features ? operation range : 2.7v~6.5v ? 4 stereo inputs with selectable input gain ? 2 independent speaker controls for balance ? tone controls (treble and bass) ? loudness and independent mute function ? volume control in 1.25 db/step ? i 2 c interface ? components less and good psrr ? housed in sop28, ssop28 package applications ? portable audio device ? car stereo audio ? hi-fi audio system description the ms6714 is a 4 stereo inputs/2-channel outputs d igital control audio processor for the low voltage operation. volume, tone (bass and treble), and balance (left/r ight) processor are incorporated into a single chip . the ms6714 also has the loudness function and selectable input gain . these functions can be built a hi-fi audio system easily. all functions are programmable via the serial i 2 c bus. the default states of the chip as the power is on are: the volume is -78.75db, the stereo 4 is selected, all the speaker s are mute and the gains of the input stage, the ba ss and the treble are 0db. block diagram rin2 rin1 treble bass volume & londness volume & londness bass treble lin1 lin2 lin3 rin3 ref r b r b input selector & gain control loud_r rout rin treb_r bout_r bin_r loud_l lout lin treb_l bout_l bin_l 28 6 7 9 3 4 5 14 15 16 10 11 12 20 21 22 17 18 19 supply avdd agnd 1 2 speaker att mute speaker att mute scl sda dgnd out_l out_r 25 26 24 23 27 serial bus decoder and latches lin4 rin4 8 13
mo sa ms6714 4 stereo inputs / 1 stereo output audio processor rev 3 2/18 www.mosanalog.com pin configuration symbol pin description vdd 1 supply input voltage agnd 2 analog ground treb_l 3 left channel input for treble controller treb_r 4 right channel input for treble controller rin 5 audio processor right channel input rout 6 gain output and input selector for right cha nnel loud_r 7 right channel loudness input rin4 8 right channel input 4 rin3 9 right channel input 3 rin2 10 right channel input 2 rin1 11 right channel input 1 loud_l 12 left channel loudness input lin4 13 left channel input 4 lin3 14 left channel input 3 lin2 15 left channel input 2 lin1 16 left channel input 1 lin 17 audio processor left channel input lout 18 gain output and input selector for left cha nnel bin_l 19 left bass controller input channel bout_l 20 left bass controller output channel bin_r 21 right bass controller input channel bout_r 22 right bass controller output channel out_r 23 right speaker output out_l 24 left speaker output dgnd 25 digital ground sda 26 i 2 c data input scl 27 i 2 c clock input ref 28 analog reference voltage 1/2vdd lin lin1 lin2 lin3 lin4 loud_l rin1 27 26 25 28 2 3 4 1 scl sda dgnd out_l ref vdd agnd treb_l out_r bout_r bin_r bout_l bin_l lout rin2 rin3 loud_r rout rin treb_r 23 22 21 24 6 7 8 5 19 18 17 20 10 11 12 9 15 16 14 13 ms6714 rin4 sop28 / ssop28
mo sa ms6714 4 stereo inputs / 1 stereo output audio processor rev 3 3/18 www.mosanalog.com ordering information package part number packaging marking transport media 28-pin sop (lead free) MS6714GTR ms6714g 1k units t ape and reel 28-pin sop (lead free) ms6714gu ms6714g 25 units tu be 28-pin ssop (lead free) ms6714ssgtr ms6714g 2.5k un its tape and reel 28-pin ssop (lead free) ms6714ssgu ms6714g 50 units tube rohs compliance absolute maximum ratings symbol parameter rating unit v dd supply voltage 6.5 v v esd electrostatic handling -3000 to 3000 v t stg storage temperature range -65 to 150 t a operating ambient temperature range -40 to 85 t j maximum junction temperature 150 t s soldering temperature, 10 seconds 260 r thja thermal resistance from junction to ambient in free air sop28 ssop28 210 210 /w operating ratings symbol parameter min typ max unit v dd supply voltage 2.7 - 6.5 v
mo sa ms6714 4 stereo inputs / 1 stereo output audio processor rev 3 4/18 www.mosanalog.com 5v electrical characteristics (ta=25 , all stages 0db, f=1khz, c ref =22uf, refer to the application circuit; unless ot herwise specified) symbol parameter conditions min typ max unit supply i q quiescent current v in =0v - 12.2 12.5 ma psrr power supply rejection ratio c ref = 22uf, f = 100hz 55 60 - db input selectors r in input resistance input 1,2,3,4 35 50 70 k g in input gain range gain 0 - 11.25 db g step step resolution - 3.75 - db err g gain setting error -0.2 0 0.2 db loud loudness c loud =100nf, f =20hz volume=-40db 19 20 - db volume control cr vol volume control range attenuation -78.75 - 0 db res vol volume step resolution - 1.25 - db av = 0 to -40db -0.5 0 1 db err vol volume setting error av = -40 to -60db -1 0 5 db speaker attenuators cr spk speaker control range attenuation -37.5 - 0 db res spk speaker step resolution - 1.25 - db err spk speaker setting error -0.2 0 0.1 db mute output mute attenuation - -65 -60 db bass control cr bas bass control range boost/cut -14 - 14 db res bas bass step resolution - 2 - db err bas speaker setting error f =100hz -0.3 0 0.1 db r b internal feedback resistance 34 44 58 k treble control cr bas treble control range boost/cut -14 - 14 db res bas treble step resolution - 2 - db err bas treble setting error f =20khz -0.3 0 0.1 db general vo max maximum output voltage swing (thd+n)/s <0.3% 4.3 - - vpp - -75 - db thd+n total harmonic distortion plus noise v out =2vpp - 0.0177 - % s/n signal-to-noise ratio v out =4vpp - 97 - db cs channel separation left/right 93 97 - db bus input v ih bus high input level 2 - - v v il bus low input level - - 0.8 v notes: bass and treble response see to curve. the center f requency and quality of the response behavior can b e chosen by the external.
mo sa ms6714 4 stereo inputs / 1 stereo output audio processor rev 3 5/18 www.mosanalog.com 2.7v electrical characteristics (ta=25 , all stages 0db, f=1khz, c ref =22uf, refer to the application circuit; unless ot herwise specified) symbol parameter conditions min typ max unit supply i q quiescent current v in =0v - 8.7 9 ma psrr power supply rejection ratio c ref = 22uf, f = 100hz 53 58 - db general vo max maximum output voltage swing (thd+n)/s <0.3% - 2.5 - vpp - -50 - db thd+n total harmonic distortion plus noise v out =2vpp - 0.3 - % s/n signal-to-noise ratio v out =2.5vpp 90 94 - db cs channel separation left/right 90 94 - db typical performance characteristics (ta=25 , all stages 0db, f=1khz, c ref =22uf, refer to the application circuit; unless ot herwise specified) loud (db) frequency (hz) loud (db) frequency (hz) loud (db) frequency (hz) loudness vs. volume loudness vs. frequency vs. volume loudness vs. external capacitors tone (db) frequency (hz) channel separation (db) frequency (hz) quiescent current (ma) supply voltage (v) typical tone response channel separation vs. frequency quiescent current vs. supply voltage v dd =5v c loud = 100nf 220nf open v dd =5v v in =0dbv v dd =5v treble=bass= -14~14db v dd =5v v dd =5v volume=-40db 56nf 100nf loudness off 33nf 10nf v dd =2.7v v in =-3dbv
mo sa ms6714 4 stereo inputs / 1 stereo output audio processor rev 3 6/18 www.mosanalog.com thd+n (%) frequency (hz) thd+n (%) output voltage (dbv) thd+n (%) output voltage (dbv) thd+n vs. frequency thd+n vs. output voltage thd+n vs. output voltage psrr (db) frequency (hz) psrr (db) frequency (hz) psrr vs. frequency psrr vs. frequency v dd =5v v o =2vpp v dd =5v f=1khz f=20hz f=20khz v dd =2.7v v o =2vpp v dd =2.7v f=1khz f=20hz f=20khz cap=22uf cap=10uf v dd =5v v rr =-20dbv cap=22uf cap=10uf v dd =2.7v v rr =-20dbv
mo sa ms6714 4 stereo inputs / 1 stereo output audio processor rev 3 7/18 www.mosanalog.com i 2 c bus description start and stop conditions a start condition is activated when the scl is set to high and sda shifts from high to low state. the stop condition is activated when scl is set to high and sda shifts from low to high state. please refer to the timing diagram below. sda scl start stop scl : serial clock line, sda : serial data line data validity a data on the sda line is considered valid and stab le only when the scl signal is in high state. the h igh and low states of the sda line can only change when the scl signal is low. please refer to the figure belo w. sda scl data line stable, data valid data change allowed byte format every byte transmitted to the sda line consists of 8 bits. each byte must be followed by an acknowledg e bit. the msb is transmitted first. acknowledge during the acknowledge clock pulse, the master (up) put a resistive high level on the sda line. the pe ripheral (audio processor) that acknowledges has to pull-dow n (low) the sda line during the acknowledge clock p ulse so that the sda line is in a stable low state during this c lock pulse. please refer to the diagram below. scl sda msb acknowledge 1 2 3 7 8 9 start the audio processor that has been addressed has to generate an acknowledge after receiving each byte, otherwise, the sda line will remain at the high level during t he ninth (9 th ) clock pulse. in this case, the master transmitter can generate the stop information in order to abort the transfer.
mo sa ms6714 4 stereo inputs / 1 stereo output audio processor rev 3 8/18 www.mosanalog.com timing of sda and scl bus lines t f s t low t hd;sta t r t hd;dat t su;dat t f t high t hd;sta t su;sta s r s p t sp t su;sto t r t buf sda scl standard mode symbol parameter min max unit f scl scl clock frequency 0 100 khz t hd:sta hold time (repeated) start condition. after this period, the first clock pulse is generat ed 4.0 - us t low low period of the scl clock 4.7 - us t high high period of the scl clock 4.0 - us t su:sta set-up time for a repeated start condition 4.7 - us t hd:dat data hold time: for i 2 c-bus devices 0 3.45 us t su:dat data-set-up time 250 - ns t r rise time of both sda and scl signals - 1000 ns t f fall time of both sda and scl signals - 300 ns t su:sto set-up time for stop condition 4.0 - us t buf bus free time between a stop and start condition 4. 7 - us c b capacitive load for each bus line - 400 pf v nl noise margin at the low level for each connected device (including hysteresis) 0.1v dd - v v nh noise margin at the high level for each connected d evice (including hysteresis) 0.2v dd - v bus interface data are transmitted to and from the mcu to the ms6 714 via the sda and scl. the sda and scl make up th e bus interface. it should be noted that pull-up resi stors must be connected to the positive supply volt age. sda (serial data line) rp rp scl (serial clock line) pull up resistors v dd mcu ms6714
mo sa ms6714 4 stereo inputs / 1 stereo output audio processor rev 3 9/18 www.mosanalog.com interface protocol the format consists of the following ? a start condition ? a chip address byte including the ms6714 address. ( 7bits) ? the 8 th bit of the byte must be 0.(write=0, read=1) ? ms6714 must always acknowledge the end of each tran smitted byte. ? a data sequence (n-bytes + acknowledge) ? a stop condition scl sda 1-7 8 9 1-7 8 9 9 8 1-7 s p address r / w -- ack ack ack data data start condition stop condition address code the chip address of the ms6714 is 88h. 1 0 0 0 0 0 1 0 7 bits address ms6714 address w data bytes description the default states of the chip as the power is on a re: the volume is -78.75db, the stereo 4 is select ed, all the speakers are mute and the gains of the input stage, the bass and the treble are 0db. msb lsb function 0 0 b2 b1 b0 a2 a1 a0 volume control 1 1 0 b1 b0 a2 a1 a0 speaker att l 1 1 1 b1 b0 a2 a1 a0 speaker att r 0 1 0 g1 g0 s2 s1 s0 audio switch 0 1 1 0 c3 c2 c1 c0 bass control 0 1 1 1 c3 c2 c1 c0 treble control where ax = 1.25db steps; bx = 10db steps; cx = 2db steps; gx = 3.75db steps
mo sa ms6714 4 stereo inputs / 1 stereo output audio processor rev 3 10/18 www.mosanalog.com volume msb lsb function 0 0 b2 b1 b0 a2 a1 a0 volume 1.25 db steps 0 0 0 0 0 0 1 -1.25 0 1 0 -2.5 0 1 1 -3.75 1 0 0 -5 1 0 1 -6.25 1 1 0 -7.5 1 1 1 -8.75 0 0 b2 b1 b0 a2 a1 a0 volume 10db steps 0 0 0 0 0 0 1 -10 0 1 0 -20 0 1 1 -30 1 0 0 -40 1 0 1 -50 1 1 0 -60 1 1 1 -70 the default volume is C78.75db. speaker attenuator msb lsb function db 1 1 0 b1 b0 a2 a1 a0 speaker att l 1 1 1 b1 b0 a2 a1 a0 speaker att r 0 0 0 0 0 0 1 -1.25 0 1 0 -2.5 0 1 1 -3.75 1 0 0 -5 1 0 1 -6.25 1 1 0 -7.5 1 1 1 -8.75 0 0 0 0 1 -10 1 0 -20 1 1 -30 1 1 1 1 1 mute lf: left front, rf: right front, lr: left rear, rr: right rear the default state is mute.
mo sa ms6714 4 stereo inputs / 1 stereo output audio processor rev 3 11/18 www.mosanalog.com audio switch msb lsb function 0 1 0 g1 g0 s2 s1 s0 audio switch 0 0 stereo 1 0 1 stereo 2 1 0 stereo 3 1 1 stereo 4 0 loudness on 1 loudness off 0 0 +11.25db 0 1 +7.5db 1 0 +3.75db 1 1 0db the default state is stereo 4, loudness off and gai n 0db. bass and treble msb lsb function db 0 1 1 0 c3 c2 c1 c0 bass 0 1 1 1 c3 c2 c1 c0 treble 0 0 0 0 -14 0 0 0 1 -12 0 0 1 0 -10 0 0 1 1 -8 0 1 0 0 -6 0 1 0 1 -4 0 1 1 0 -2 0 1 1 1 0 1 0 0 0 0 1 0 0 1 2 1 0 1 0 4 1 0 1 1 6 1 1 0 0 8 1 1 0 1 10 1 1 1 0 12 1 1 1 1 14 the default state is bass 0db and treble 0db.
mo sa ms6714 4 stereo inputs / 1 stereo output audio processor rev 3 12/18 www.mosanalog.com examples set volume at C37.5db. msb ack start 0 0 0 1 1 0 1 1 ms6714 address lsb stop ack -30db -7.5db data byte set speaker right at C30db. msb ack start 1 1 1 1 0 0 1 0 ms6714 address lsb stop ack -30db 0db speaker r data byte set speaker left in mute-on. msb ack start 1 1 0 1 1 1 1 1 ms6714 address lsb stop ack speaker l mute data byte set stereo 2 input with gain of +7.5 db and loudnes s on. msb ack start 0 1 0 0 0 1 1 0 ms6714 address lsb stop ack +7.5db stereo 2 loudness on data byte set treble at -10db. msb ack start 0 1 1 1 1 0 0 0 ms6714 address lsb stop ack treble -10db data byte
mo sa ms6714 4 stereo inputs / 1 stereo output audio processor rev 3 13/18 www.mosanalog.com application information basic application example mcu ms6714 ref sda avdd agnd loud_r rout rin treb_r bout_r bin_r loud_l lout lin treb_l bout_l bin_l 28 1 2 6 5 25 26 27 scl dgnd 18 17 12 2.2u 2.2u avdd 22u 7 100n 22 100n 21 100n 5.6k 4 2.7n 20 100n 19 5.6k 100n 100n 3 2.7n out_l out_r 24 23 10u 10u output rin2 rin1 lin1 lin2 lin3 rin3 9 14 15 16 10 11 2.2u input lin4 rin4 8 13 2.2u
mo sa ms6714 4 stereo inputs / 1 stereo output audio processor rev 3 14/18 www.mosanalog.com external dimensions sop28 (300mil) h h x45 c detail a 0.25mm detail a l ? e a1 e b a d dimension in mm dimension in inch symbol min max min max a 2.35 2.65 0.0926 0.1043 a1 0.10 0.30 0.0040 0.0118 b 0.33 0.51 0.013 0.020 c 0.23 0.32 0.0091 0.0125 e 1.27 basic 0.050 basic e 7.40 7.60 0.2914 0.2992 h 10.00 10.65 0.394 0.419 l 0.40 1.27 0.016 0.050 d 17.70 18.10 0.6969 0.7125 h 0.25 0.75 0.010 0.029 0 o 8 o 0 o 8 o
mo sa ms6714 4 stereo inputs / 1 stereo output audio processor rev 3 15/18 www.mosanalog.com ssop28 a a2 a1 e1 e l1 detail a l ? 2 ? 1 r1 r ? detail a h x45 c d zd e b dimension in mm dimension in inch symbol min nom max min nom max a 1.35 1.63 1.75 0.053 0.064 0.069 a1 0.10 0.15 0.25 0.004 0.006 0.010 a2 - - 1.50 - - 0.059 b 0.20 - 0.30 0.008 - 0.012 c 0.18 - 0.25 0.007 - 0.010 e 0.635 basic 0.025 basic d 9.8 9.91 10.01 0.388 0.390 0.394 e 5.79 5.99 6.20 0.228 0.236 0.244 e1 3.81 3.91 3.99 0.150 0.154 0.157 l 0.41 0.635 1.27 0.016 0.025 0.050 h 0.25 - 0.50 0.010 - 0.020 zd 0.838ref 0.033ref r1 0.20 - 0.33 0.008 - 0.013 r 0.20 - - 0.008 - - 0 o - 8 o 0 o - 8 o 1 0 o - -0 o - - 2 5 o 10 o 15 o 5 o 10 o 15 o
mo sa ms6714 4 stereo inputs / 1 stereo output audio processor rev 3 16/18 www.mosanalog.com demo board the demo board used ir technique controller to cont rol the ms6714. the default states of demo board ar e stereo 4, input gain 0db, volume C20db, attenuator speakers 0 db, loudness off, bass 0db and treble 0db. label 1: supply voltage the avdd and dvdd should be the same supply voltage , the supply range is 2.7 ~ 6.5 vdc. label 2: led indicator the led indicates the power status and the ir recei ved status. it is red-dark blink once when the mcu has received the function code correctly. label 3: output section please connected to a post-power-amplifier, as acti ve speaker. label 4: input section there are four stereo inputs in the section. please input stereo audio signal, as music or sine wave. label 5: mcu reset the ms6714 will be loaded the default values by mcu . the default states of demo board are stereo 4, in put gain 0db, volume C20db, attenuator speakers 0db, loudness off , bass 0db and treble 0db. 1 2 3 1 4 5
mo sa ms6714 4 stereo inputs / 1 stereo output audio processor rev 3 17/18 www.mosanalog.com ir controller in1, in2, in3, in4 : select stereo input. in1, 2, 3, 4 represents stereo input 1, 2, 3, 4. vol+, vol- : the volume control keys. the volume control in 1.5db/step as the switch is p ressed once, the range is C79db to 0db. gain+, gain- : the gain control keys for stereo input. the gain control in 3.75db/step as the switch is pr essed once, the range is 0db to 11.25db. attl+, attl- : the attenuation control keys for left speaker outpu t. the attenuation in 1.25db/step as the switch is pre ssed once, the range is -37.5db to 0db. attr+, attr- : the attenuation control keys for right speaker outp ut. the attenuation in 1.25db/step as the switch is pre ssed once, the range is -37.5db to 0db. tre+, tre- : the treble control keys. the treble control in 2db/step as the switch is pre ssed once, the range is C14db to 14db. bas+, bas- : the bass control keys. the bass control in 2db/step as the switch is press ed once, the range is -14db to 14db. loud : the loudness key press the key once to set loudness on or loudness o ff. mute : the mute key controls all speaker outputs press the key once to set mute-on or mute-off.
mo sa ms6714 4 stereo inputs / 1 stereo output audio processor rev 3 18/18 www.mosanalog.com circuit y1 12m rst 1 p3.0 2 p3.1 3 xtal2 4 xtal1 5 p3.2 6 p3.3 7 p3.4 8 p3.5 9 gnd 10 vcc 20 p1.7 19 p1.6 18 p1.5 17 p1.4 16 p1.3 15 p1.2 14 p1.1 13 p1.0 12 p3.7 11 u1 at89x51 1 2 j1 dvcc r4 10k s1 rst ir_in + c3 10u + c6 20p + c7 20p dvcc(3v) vs 3 ir 1 gnd 2 j2 ir r3 10k + c5 470p + c2 47u ir_in r1 220 sda scl vdd 1 agnd 2 treb_l 3 treb_r 4 rin 5 rout 6 loud_r 7 rin4 8 rin3 9 rin2 10 rin1 11 loud_l 12 lin4 13 lin3 14 lin2 15 lin1 16 lin 17 lout 18 bin_l 19 bout_l 20 bin_r 21 bout_r 22 out_r 23 out_l 24 dgnd 25 sda 26 scl 27 ref 28 u2 ms6714 1 2 j5 avdd(6v) + c13 10u + c14 10u + c15 10u + c16 10u + c17 10u + c18 10u + c27 22u + c19 2.2u + c8 10u + c11 10u + c25 10u + c24 10u + c26 2.2u r5 5.6k r6 5.6k + c23 0.1u + c22 0.1u + c21 0.1u + c20 0.1u + c31 0.1u + c30 0.1u + c29 2.7n + c28 2.7n + c9 0.1u sda scl avdd w1 jumper j6 front_out j11 in1 j8 in4 j9 in3 j10 in2 1 2 3 4 5 6 7 8 9 j7 input 1 2 3 j4 out 1 2 3 j3 lcd rx tx rx tx + c4 0.1u + c1 10u + c12 10u r2 1k d1 power r22 10k r21 10k

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