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mosa ms6258 gain and attenuation volume controller ic rev 6 1 www.mosanalog.com gain and attenuation volume controller ic 4 sets of stereo input, low voltage gain and attenuation 15~-79db features ? operation range: 2.7v~6.5v. ? low power consumption. ? gain/attenuation: 15db to ?79db. ? +1db/step, -1db/step and -10db/step are controlled independently. ? good psrr and low pop noise. ? i 2 c interface. ? housed in 16 pin sop, ssop package. applications ? multimedia system. ? hi-fi audio system. ? mp3 pda. description the ms6258 is a stereo audio volume controller ic with 4 se ts of stereo input. it uses cmos technology specially for the low voltage application with low noise, rail-to-rail output. the ms6258 provide an i 2 c control interface with gain / attenuation range of 15db to -79db. the gain and attenuation, +1db/step, -1db/step and -10db/step are controlled independently. the initial condition is set to be maximum attenuation ?79db (-70db + -9db), gain 0db and mute on mode when the power is up. block diagram ref sda scl r-out l-out i 2 c interface -10db/step -1db/step 1db/step serial bus decoder and latches reference circuit 1db/step -1db/step -10db/step mute control attenuation 0~-79db gain 0~15db gain 0~15db attenuation 0~-79db r-in2 r-in3 l-in1 l-in2 l-in3 r-in1 r-in4 l-in4 v ref
mosa ms6258 gain and attenuation volume controller ic rev 6 2 www.mosanalog.com pin configuration symbol pin description a.o. 1 address option * l-in4 2 4 th left channel input l-in3 3 3 rd left channel input l-in2 4 2 nd left channel input l-in1 5 1 st left channel input l-out 6 left channel output v ss 7 ground sda 8 i 2 c data input scl 9 i 2 c clock input v dd 10 positive supply voltage r-out 11 right channel output r-in1 12 1 st right channel input r-in2 13 2 nd right channel input r-in3 14 3 rd right channel input r-in4 15 4 th right channel input v ref 16 reference voltage = 1/2v dd 16 15 14 13 12 11 10 9 ms6258 a.o. 1 2 3 4 5 6 7 l-in3 l-in2 l-in1 l-out v ss sda scl v ref r-in3 r-in2 r-in1 r-out v dd 8 l-in4 r-in4 ms6258 note: 1. pin 1 is set to lo or open , the address code is 88h (10001000b). 2. pin 1 is set to hi , the address code is 8ch (10001100b). 3. the v ref connects a capacitor to vss. ordering information package part number packag ing marking transport media 16-pin sop (lead free) ms6258gtr ms6258asg 2.5k units tape and reel 16-pin sop (lead free) ms6258gu ms6258asg 50 units tube 16-pin ssop (lead free) ms6258ssgtr ms6258g 2.5k units tape and reel 16-pin ssop (lead free) ms6258ssgu ms6258g 100 units tube rohs compliance absolute maximum ratings symbol parameter rating unit v dd supply voltage 6.5 v v esd electrostatic handling -4500 to 4500 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 junc tion to ambient in free air sop16 ssop16 210 210 /w
mosa ms6258 gain and attenuation volume controller ic rev 6 3 www.mosanalog.com operating ratings symbol parameter min typ max unit v dd supply voltage 2.7 - 6.5 v 5v electrical characteristics (v dd =5.0v, v ss =0v, attenuation=0db, gain=0db, f=1khz, v o =0dbv, v ref cap=10uf; unless otherwise specified) symbol parameter conditions min typ max unit dc characteristics i q quiescent current - 3.8 4.2 ma max gain - 15 - db a ga gain/attenuation max attenuation - -79 - db a step gain/attenuation step - 1 - db e ga gain/attenuation step error - 0.3 - db cs channel separation 95 105 - db psrr power supply rejection ratio vripple = -20dbv, 100hz - 53 - db mute mute attenuation vin=0dbv - 85 - db rin input impedance 18 20 - k rout output impedance - 50 100 ac characteristics vo maximum output voltage swing (thd+n)/s < 0.1% - 4.8 - vpp thd+n total harmonic distortion plus noise - -69 -64 db s/n signal-to-noise ratio v o =4.5vpp 95 100 - db bus characteristics v ih bus high input level - - 0.7v dd v v il bus low input level 0.3v dd - - v
mosa ms6258 gain and attenuation volume controller ic rev 6 4 www.mosanalog.com 3.3v electrical characteristics (v dd =3.3v, v ss =0v, attenuation=0db, gain=0db, f=1khz, v o =-3dbv, v ref cap=10uf; unless otherwise specified) symbol parameter conditions min typ max unit dc characteristics i q quiescent current - 3.7 4.1 ma cs channel separation 90 100 - db psrr power supply rejection ratio vripple = -20dbv, 100hz - 52 - db mute mute attenuation vin=-3dbv - 80 - db ac characteristics vo maximum output voltage swing (thd+n)/s < 0.1% - 3 - vpp thd+n total harmonic distortion plus noise - -69 -64 db s/n signal-to-noise ratio 85 90 - db 2.7v electrical characteristics (v dd =2.7v, v ss =0v, attenuation=0db, gain=0db, f=1khz, v o =-3dbv, v ref cap=10uf; unless otherwise specified) symbol parameter conditions min typ max unit dc characteristics i q quiescent current - 3.2 3.6 ma cs channel separation 90 100 - db psrr power supply rejection ratio vripple = -20dbv, 100hz - 50 - db mute mute attenuation vin=-3dbv - 80 - db ac characteristics vo maximum output voltage swing (thd+n)/s < 0.3% - 2 - vpp thd+n total harmonic distortion plus noise - -69 -64 db s/n signal-to-noise ratio 85 90 - db
mosa ms6258 gain and attenuation volume controller ic rev 6 5 www.mosanalog.com typical performance characteristics (ta=25 , v ref cap=10uf; unless otherwise specified) thd+n (%) output voltage (dbv) thd+n (%) output voltage (dbv) thd+n (%) output voltage (dbv) thd+n vs. output voltage thd+n vs. output voltage thd+n vs. output voltage f=20hz f=20hz f=20hz f=1khz f=20khz f=20khz f=1khz f=1khz f=20khz v dd =5v v dd =2.7v v dd =3.3v thd+n (%) frequency (hz) channel separation (db) frequency (hz) quiescent current (ma) supply voltage (v) thd+n vs. frequency channel separation vs. frequency quiescent current vs. supply voltage v dd =5v v o =0dbv v dd =3.3v v o =-3dbv v dd =2.7v v o =-3dbv v dd =5v v o =0dbv v dd =2.7v v o =-3dbv v dd =3.3v v o =-3dbv psrr (db) frequency (hz) psrr (db) frequency (hz) psrr (db) frequency (hz) psrr vs. frequency psrr vs. frequency psrr vs. frequency cap=22uf cap=22uf cap=22uf cap=10uf cap=10uf cap=10uf cap=2.2uf cap=2.2uf cap=2.2uf v dd =5v v rr =-20dbv v dd =3.3v v rr =-20dbv v dd =2.7v v rr =-20dbv
mosa ms6258 gain and attenuation volume controller ic rev 6 6 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 sh ifts 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 stable only when the scl signal is in high state. the high and low states of the sda line can only change when the sc l signal is low. please refer to the figure below. sda scl data line stable, data valid data change allowed byte format ev ery byte transmitted to the sda line consists of 8 bits . each byte must be followed by an acknowledge bit. the msb is transmitted first. acknowledge d uring the acknowledge clock pulse, the master (up) put a resistive high level on the sda line. the peripheral (audio processor) that acknowledges has to pull-down (low) the sda line during the acknowledge clock pulse so that the sda line is in a stable low state during this clock pulse. please refer to the diagram below. scl sda msb acknowledge 123 789 start the audio processor that has been addr essed has to generate an acknowledge after receiving each byte, otherwise, the sda line will remain at the high level during the ninth (9 th ) clock pulse. in this case, the master transmitter can generate the stop information in order to abort the transfer.
mosa ms6258 gain and attenuation volume controller ic rev 6 7 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 sp 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 generated 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 n oise margin at the low level for each connected device (including hysteresis) 0.1v dd - v v nh n oise margin at the high level for each connected device (including hysteresis) 0.2v dd - v
mosa ms6258 gain and attenuation volume controller ic rev 6 8 www.mosanalog.com bus interface data are transmitted to and from the mcu to the ms6 258 via the sda and scl. the sda and scl make up the bus interface. it should be noted that pull-up resistors must be connected to the positive supply voltage. sda (serial data line) rp rp scl (serial clock line) pull up resistors v dd mcu ms6258 interface protocol the fo rmat consists of the following ? a start condition ? a chip address byte including the ms6258 address. (7bits) ? the 8 th bit of the byte must be ?0?.(write=0, read=1) ? ms6258 must always acknowledge th e end of each transmitted 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 protocol address pin1(a.o.) = low or open 1000 00 10 7 bits address ms6258 address w pin1(a.o.) = high 1000 00 11 7 bits address ms6258 address w
mosa ms6258 gain and attenuation volume controller ic rev 6 9 www.mosanalog.com data bytes description functi on bits msb lsb function 1 1 1 1 1 1 1 1 function off (-79db) 1 1 0 1 a3 a2 a1 a0 2-channel, -1db/step 1 1 1 0 0 b2 b1 b0 2-channel, -10db/step 1 0 1 0 a3 a2 a1 a0 left channel, -1db/step 1 0 1 1 0 b2 b1 b0 left channel, -10db/step 0 0 1 0 a3 a2 a1 a0 right channel, -1db/step 0 0 1 1 0 b2 b1 b0 right channel, -10db/step 1 1 0 0 c3 c2 c1 c0 2-channel, +1db/step 0 1 1 0 c3 c2 c1 c0 left channel, +1db/step 0 1 0 1 c3 c2 c1 c0 right channel, +1db/step 0 0 0 0 stereo1 0 0 0 1 stereo2 0 0 1 0 stereo3 0 1 0 0 0 0 1 1 stereo4 0 0 0 1 power off preparation (pop noise free) 1 0 0 1 2-channel, mute on 0 1 1 1 1 0 0 0 2-channel, mute off gain / attenuation bits a3 a2 a1 a0 attenuation (db) gain (db) - b2 b1 b0 c3 c2 c1 c0 a b c 0 0 0 0 0 0 0 0 0 0 1 -1 -10 +1 0 0 1 0 -2 -20 +2 0 0 1 1 -3 -30 +3 0 1 0 0 -4 -40 +4 0 1 0 1 -5 -50 +5 0 1 1 0 -6 -60 +6 0 1 1 1 -7 -70 +7 1 0 0 0 -8 - +8 1 0 0 1 -9 - +9 1 0 1 0 - - +10 1 0 1 1 - - +11 1 1 0 0 - - +12 1 1 0 1 - - +13 1 1 1 0 - - +14 1 1 1 1 - - +15 1. attenuation bit, ax = -1db/step, bx = -10db/step 2. gain bit, cx = +1db/step 3. total gain / attenuation equal ax + bx + cx. 4. the function of power off preparation is to prevent pop noise when power off.
mosa ms6258 gain and attenuation volume controller ic rev 6 10 www.mosanalog.com example mute off the initial condition is ?79db and mute on when power on. the first command must disable the mute function. data byte 1000 00 msb 10 ack start 0111 00 10 ms6258 address 2-ch, mute off lsb stop ack set gain of 2 channel at 0db, and selected stereo 1 input. ack stop 1100 00 00 2-ch, +1db/step, 0db ack start ms6258 address ack 1110 00 00 2-ch, -10db/step, 0db 1101 00 00 ack 2-ch, -1db/step, 0db 0100 0 00 ack stereo 1 input 0 set gain of 2 channel at 6db, and selected stereo 2 input. the value of attenuation must be set zero when the volume from attenuation to gain. ack stop 1100 10 01 2-ch, +1db/step, 6db ack start ms6258 address ack 1110 00 00 2-ch, -10db/step, 0db 1101 00 00 ack 2-ch, -1db/step, 0db ack 0100 0 00 1 stereo 2 input set gain of 2 channel at -3db , and selected stereo 3 input. the value of gain must be set zero when the volume from gain to attenuation. ack start ms6258 address ack 1100 00 00 2-ch, +1db/step, 0db 1110 00 00 ack 2-ch, -10db/step, 0db ack 1101 11 00 2-ch, -1db/step, -3db ack stop 0100 1 00 0 stereo 3 input set attenuation of left channel at ?3 3db, and selected stereo 4 input. ack start ms6258 address ack 1011 11 00 l-ch, -10db/step, -30db 1010 11 00 ack l-ch, -1db/step, -3db ack 0100 11 00 stereo 4 input stop
mosa ms6258 gain and attenuation volume controller ic rev 6 11 www.mosanalog.com an example of the volume control. (volume = ax + bx + cx) set two channels at 0db. (ax + bx + cx = 0db + 0db + 0db) next, the volume changes from 0db to -9db. (ax + bx + cx = -9db + 0db + 0db) next, the volume changes from -9db to -19db. (ax + bx + cx = -9db + -10db + 0db) next, the volume changes from -19db to -20db. (ax + bx + cx = 0db + -20db + 0db) next, the volume changes from -20db to -14db. (ax + bx + cx = 0db + -20db + 6db) next, the volume changes from -14db to +6db. (ax + bx + cx = 0db + 0db + 6db) note: we suggest the gain is set as the power is up. for ex ample, set and fix the gain +10db, the volume range will be controlled from +10db to ?69db. ack start ms6258 address stop 1110 10 00 ack 2-ch, -10db/step, -20db 1101 00 00 ack 2-ch, -1db/step, 0db
mosa ms6258 gain and attenuation volume controller ic rev 6 12 www.mosanalog.com application information basic application example mcu sda 8 9 scl v dd v ss supply 10 7 47uf 0.1uf stereo signal 1 ms6258 l-in1 r-in1 5 12 10uf 10uf l-in2 r-in2 4 13 10uf 10uf l-in3 r-in3 3 14 10uf 10uf l-in4 r-in4 2 15 10uf 10uf stereo signal 2 stereo signal 3 stereo signal 4 10k l-out 6 10uf r-out 11 power amplifier 10uf 10k a.o v ref 10uf lo : addr 10001000b hi : addr 10001100b 16 1 basic application flowchart volume control for attenuation volume down to -79 db step by step enable mute function mute on power down v dd = 0v pop noise free power off preparation wait 0.5 sec procedure of power down procedure of power up setting gain set the max signal initial conditions function off (-79db) mute on pop noise free wait 1 sec disable mute function mute off power up v dd = 5v volume control for attenuation volume up/down step by step 1. the initial condition is ?79db, gain 0db and mute on when power on. 2. in order to prevent pop noise when power on, please wait 1 sec to transmit i 2 c command.
mosa ms6258 gain and attenuation volume controller ic rev 6 13 www.mosanalog.com external dimensions sop16 f h d a a1 b e h x 45 c detail a 0.25mm detail a l ssop16 a a2 a1 d e1 e detail a b e zd l1 h x 45 c detail a l 2 1 r1 r dimension in mm dimension in inch symbol min max min max a 1.35 1.75 0.053 0.069 a1 0.10 0.25 0.004 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 4.80 5.00 0.189 0.197 e 5.79 6.20 0.228 0.244 e1 3.81 3.99 0.150 0.157 l 0.41 1.27 0.016 0.050 h 0.25 0.50 0.010 0.020 l1 0.254 basic 0.010 basic zd 0.229 ref 0.009 ref 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 15 o 5 o 15 o dimension in mm dimension in inch symbol min max min max a 1.35 1.75 0.0532 0.0688 a1 0.10 0.25 0.0040 0.0098 b 0.33 0.51 0.013 0.020 c 0.19 0.25 0.0075 0.0098 e 1.27 bsc 0.050 bsc d 9.80 10.00 0.3859 0.3937 h 5.80 6.20 0.2284 0.2440 e 3.80 4.00 0.1497 0.1574 l 0.40 1.27 0.016 0.050 h 0.25 0.50 0.0099 0.0196 0 o 8 o 0 o 8 o
mosa ms6258 gain and attenuation volume controller ic rev 6 14 www.mosanalog.com tape and reel (unit : mm) sop16 4.00 1.50 min section a - a 2.00 1.0 8.00 2.10 r 0.3 max 0.30 0.5 1.5 +0.1/-0.0 6.50 10.30 r 0.5 typ a a 7.5 0.1 16.0 0.3 1.75 1.0 ssop16 3.0 3.6 12.0 6.9 8.0 5.5 1.75 5.4 2.0 4.0 1.5+0.1/-0.0 dia 0.5 radius typical 1.5 min 0.30 0.3r max 1.7 2.0 0.05 0.05 0.05 0.3
mosa ms6258 gain and attenuation volume controller ic rev 6 15 www.mosanalog.com demo board 1 3 6 1 5 2 4 function description 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 leds indicate the chip status and ir received status. it keeps on a light state when the ms6257 is active. the other hand, keeps on a dark state wh en the ms6257 is power-off. it is red-dark b link once when the mcu has received the function code correctly. label 3: reset all i/o pins are reset to default values. volume 0db and mute on. label 4: input section please input stereo audio signa l, as music or sine wave. label 5: i2c address option as the jump is closed, the address code is 88h. as the jump is open, the address code is 8ch. label 6: output section please connected to a post-power -amplifier, as stereo speaker.
mosa ms6258 gain and attenuation volume controller ic rev 6 16 www.mosanalog.com ir controller 2-ch+ : the volume-up switch for stereo channel the volume increase by +1db as the switch is pressed once, the maximum value is up to +15db. the default value is 0db on initial status. l-channel and r-channel are active synchronic. 2-ch- : the volume-down switch for stereo channel the volume decrease by -1db as the switch is pressed once, the minimum value is up to -79db. l-channel and r-channel are active synchronic. lch+ : the volume-up switch for left channel the volume increase by +1db as the switch is pressed once, the maximum value is up to +15db. lch- : the volume-down switch for left channel the volume decrease by -1db as the switch is pressed once, the minimum value is up to -79db. rch+ : the volume-up switch for right channel the volume increase by +1db as the switch is pressed once, the maximum value is up to +15db. rch- : the volume-down switch for right channel the volume decrease by -1db as the switch is pressed once, the minimum value is up to - 79db. mute : press the switch once to enter mute-on or mute-off. the default status is mute-off on initial status. in1~in4 : stereo channel selection there are four sets, stereo 1 to 4. the default channel is stereo 1 on initial status.
mosa ms6258 gain and attenuation volume controller ic rev 6 17 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 at89cx51 1 2 j1 dvcc r4 10k s1 rst ir_in + c2 10u + c4 20p + c5 20p dvcc vs 3 ir 1 gnd 2 j2 ir r2 10k r1 220 + c3 4 70p + c1 47u ir_in sda scl 1 2 j4 avdd + c9 10u + c11 10u + c12 10u + c8 10u + c10 10u + c7 0.1u avdd w1 jumper j5 output j6 in1 d1 led r3 1k 1 2 3 j3 lcd rx tx rx tx a.o. 1 l-in4 2 l-in3 3 l-in2 4 l-in1 5 l-out 6 vss 7 sda 8 scl 9 vdd 10 r-out 11 r-in1 12 r-in2 13 r-in3 14 r-in4 15 cap 16 u3 ms6258 + c6 10u scl sda r8 10k r7 10k r6 10k r5 10k 1 2 3 4 5 6 7 8 9 10 j7 input 1 2 3 j8 output + c1 3 0.1u + c14 10u 1 2 j9 a.o. avdd + c19 10u + c20 10u j12 in2 + c17 10u + c18 10u j11 in3 c15 10u j10 in4 + + c16 10u r14 10k r13 10k r12 10k r11 10 k r10 10 k r9 10k

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