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mo sa ms6283 volume controller with soft step ic v1.1 1/18 www.mosanalog.com 3 stereo inputs (1 differential input) with gain 0~ +15db volume controller -79db~+15db with soft step class ab headphone driver, low voltage features ? operation range: 2.5v~6.5v. ? one quasidifferential input. ? soft step volume control 79db ~ +15db. ? input gain: 0db ~ +15db. ? low power consumption. ? good psrr and low pop noise. ? i 2 c interface. ? housed in 16 pin sop, ssop packages. applications ? multimedia system ? hifi audio system. ? bluetooth. ? dab description the ms6283 is a class ab headphone drivers with aud io volume controller. the ms6283 have 3 sets of ste reo input(1 differential input), soft step control with programmable blend times. it uses cmos technology specially for the low voltage application with low noise, railto rail output. block diagram
mo sa ms6283 volume controller with soft step ic v1.1 2/18 www.mosanalog.com pin configuration symbol pin description lin3n / nc 1 negative input for 3 rd left channel(differential) / no connected(single end) lin3p / lin3 2 positive input for 3 rd left channel(differential) / 3 rd left channel input nc 3 no connected lin2 4 2 nd left channel input lin1 5 1 st left channel input lout 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 rout 11 right channel output rin1 12 1 st right channel input rin2 13 2 nd right channel input rin3n / nc 14 negative input for 3 rd right channel(differential) / no connected(single end) rin3p / rin3 15 positive input for 3 rd right channel(differential) / 3 rd right channel input v ref 16 reference voltage = 1/2v dd 16 15 14 13 12 11 10 9 ms6258 l-in3n/nc 1 23 4 5 6 7 l-in3p/l-in3 l-in2 l-in1 l-out v ss sda scl v ref r-in3n/nc r-in2 r-in1 r-out v dd 8 nc r-in3p/r-in3 ms6283
mo sa ms6283 volume controller with soft step ic v1.1 3/18 www.mosanalog.com ordering information package part number packaging marking transport media 16pin sop (lead free) ms6283gtr ms6283g 2.5k units tape and reel 16pin sop (lead free) MS6283GU ms6283g 50 units tu be 16pin ssop (lead free) ms6283ssgtr ms6283g 2.5k un its tape and reel 16pin ssop (lead free) ms6283ssgu ms6283g 100 unit s 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 120 t s soldering temperature, 10 seconds 260 r thja thermal resistance from junction to ambient in free air sop16 ssop16 110.9 115.9 /w operating ratings symbol parameter min typ max unit v dd supply voltage 2.5 6.5 v 5v electrical characteristics (ta=25 ;v dd =5v, v ss =0v; c ref = 1uf ; r l =32 ; refer to the application circuit; unless ot herwise specified) symbol parameter conditions min typ max unit supply i q quiescent current v in =0v 5.6 6.2 ma i pd power down current v in =0v 130 ua psrr power supply rejection ratio f = 100hz 55 58 db input selectors r in input resistance input 1,2,3 100 k r indiff input resistance differential 100 k g in input gain range gain 0 15 db g step step resolution 1 db err g gain setting error 0.2 0 0.2 db cmrr common mode rejection ratio vcm = 1vrms @ 1khz 40 55 db vcm = 1vrms @ 10khz 40 55 db
mo sa ms6283 volume controller with soft step ic v1.1 4/18 www.mosanalog.com volume control cr vol volume control range attenuation & gain 79 +15 d b res vol volume step resolution 1 db err vol volume setting error av = +15 to 40db 0.5 0 1 db av = 40 to 79db 1 0 5 db mute mute attenuation vin=0dbv 90 db general vo max maximum output voltage swing (thd+n)/s <0.1% 1.45 vrms thd+n total harmonic distortion plus noise v out = 1vrms 64 db 0.063 % s/n signaltonoise ratio v out = 1vrms 93 db cs channel separation 90 95 db bus input v ih bus high input level 1.8 v v il bus low input level 0.8 v 3.3v electrical characteristics (ta=25 ;v dd =3.3v, v ss =0v; c ref = 1uf ; r l =32 ; refer to the application circuit; unless ot herwise specified) symbol parameter conditions min typ max unit supply i q quiescent current v in =0v 4.7 5.2 ma i pd power down current v in =0v 82 ua psrr power supply rejection ratio f = 100hz 65 70 db general v omax maximum output voltage swing (thd+n)/s <0.1% 1 vrms thd+n total harmonic distortion plus noise v out = 0.707vrms 65 db 0.056 % s/n signaltonoise ratio v out = 0.707vrms 90 db cs channel separation left/right 90 93 db 2.5v electrical characteristics (ta=25 ;v dd =2.5v, v ss =0v; c ref = 1uf ; r l =32 ; refer to the application circuit; unless ot herwise specified) symbol parameter conditions min typ max unit supply i q quiescent current v in =0v 3.3 3.6 ma i pd power down current v in =0v 60 ua psrr power supply rejection ratio f = 100hz 60 65 db general vo max maximum output voltage swing (thd+n)/s <0.1% 0.707 vrms thd+n total harmonic distortion plus noise v out = 0.707vrms 65 db 0.056 % s/n signaltonoise ratio v out = 0.707vrms 90 db cs channel separation left/right 90 93 db
mo sa ms6283 volume controller with soft step ic v1.1 5/18 www.mosanalog.com typical performance characteristics (ta=25 ; c ref = 1uf,10uf; r l =32 ; refer to the application circuit; unless ot herwise 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 thd+n (%) frequency (hz) channel separation (db) frequency (hz) quiescent current (ma) supply voltage (v) thd+n vs. frequency cmrr vs. frequency quiescent current vs. supply voltage psrr (db) frequency (hz) psrr (db) frequency (hz) psrr (db) frequency (hz) psrr vs. frequency psrr vs. frequency psrr vs. frequency v dd =5v f=1khz f=20hz f=20khz v dd =3.3v f=1khz f=20hz f=20khz v dd =2.5v f=1khz f=20hz f=20khz v dd =5v v dd =3.3v cap=1uf v dd = 5v v rr =-20dbv cap=10uf v dd = 3.3v v rr =-20dbv cap=1uf cap=10uf cap=1uf v dd = 2.5v v rr =-20dbv cap=10uf v dd =2.5v v dd =5v v o =0dbv v dd =3.3v v o =-3dbv v dd =2.5v v o =-3dbv
mo sa ms6283 volume controller with soft step ic v1.1 6/18 www.mosanalog.com channel separation (db) frequency (hz) attenuation (db) frequency (hz) channel separation vs. frequency mute vs. frequency
mo sa ms6283 volume controller with soft step ic v1.1 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 pulldow 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 ms6283 volume controller with soft step ic v1.1 8/18 www.mosanalog.com bus interface data are transmitted to and from the mcu to the ms6 283 via the sda and scl. the sda and scl make up th e bus interface. it should be noted that pullup 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 ms6283 interface protocol the format consists of the following ? a start condition ? a chip address byte including the ms6283 address. ( 7bits) ? the 8 th bit of the byte must be 0. ? the ms6283 must always acknowledge the end of each transmitted byte. ? a data sequence (nbytes + acknowledge) ? a stop condition chip address the chip address of the ms6283 is 88h.
mo sa ms6283 volume controller with soft step ic v1.1 9/18 www.mosanalog.com subaddress msb lsb function a7 a6 a5 a4 a3 a2 a1 a0 0 0 0 0 0 0 0 0 softstep time / on/off , se/diff s elector 0 0 0 0 0 0 0 1 lchannel, input selector / input g ain control 0 0 0 0 0 0 1 0 rchannel, input selector / input g ain control 0 0 0 0 0 0 1 1 2channel, input selector / input g ain control 0 0 0 0 0 1 0 0 lchannel, volume control 0 0 0 0 0 1 0 1 rchannel, volume control 0 0 0 0 0 1 1 0 2channel, volume control 0 0 0 0 0 1 1 1 power management soft-step time / on / off , se/diff selector (0h) msb lsb function d7 d6 d5 d4 d3 d2 d1 d0 soft-step time 0 0 0 0.64ms 0 0 1 1.28ms 0 1 0 2.56ms 0 1 1 5.12ms 1 0 0 10.24ms 1 0 1 20.48ms 1 1 0 40.96ms 1 1 1 81.92ms soft-step 0 on 1 off se/diff 0 differential 1 singleended the initial condition is singleended, softstep of f, softstep time 40.96ms.
mo sa ms6283 volume controller with soft step ic v1.1 10/18 www.mosanalog.com input selector & gain control (01h , 02h , 03h) msb lsb function d7 d6 d5 d4 d3 d2 d1 d0 input selector 0 0 in 1 0 1 in 2 1 0 grouded 1 1 in 3 / diff input gain 0 0 0 0 0db 0 0 0 1 1db 0 0 1 0 2db 0 0 1 1 3db 0 1 0 0 4db 0 1 0 1 5db 0 1 1 0 6db 0 1 1 1 7db 1 0 0 0 8db 1 0 0 1 9db 1 0 1 0 10db 1 0 1 1 11db 1 1 0 0 12db 1 1 0 1 13db 1 1 1 0 14db 1 1 1 1 15db the initial condition is in3, 14db. we suggest the gain is set as the power is up. for example, set an d fix the gain +10db, the volume range will be controlled from 69 db to +25db.
mo sa ms6283 volume controller with soft step ic v1.1 11/18 www.mosanalog.com volume control (04h , 05h , 06h) msb lsb function d7 d6 d5 d4 d3 d2 d1 d0 0 0 0 1 1 1 1 15db 0 0 0 1 1 1 0 14db : : : : : : : : 0 0 0 0 0 0 0 0db 0 0 1 0 0 0 0 0db 0 0 1 0 0 0 1 1db : : : : : : : : 0 0 1 1 1 1 1 15db 0 1 0 0 0 0 0 16db : : : : : : : : 0 1 0 1 1 1 1 31db 0 1 1 0 0 0 0 32db : : : : : : : : 0 1 1 1 1 1 1 47db 1 0 0 0 0 0 0 48db : : : : : : : : 1 0 0 1 1 1 1 63db 1 0 1 0 0 0 0 64db : : : : : : : : 1 0 1 1 1 1 1 79db 1 1 x x x x x mute the initial condition is mute. power management (07h) msb lsb function d7 d6 d5 d4 d3 d2 d1 d0 0 release of v ref to gnd. 1 set the voltage of v ref to v dd /2. 0 x all devices active 1 1 power down the initial condition is power down , v ref = gnd.
mo sa ms6283 volume controller with soft step ic v1.1 12/18 www.mosanalog.com example softstep time 10.24ms , softstep on , singleende d mode. set the 1/2v dd , all device active. set input gain of both channels at +4db , select in put as in1. set volume of bothchannels at 15db
mo sa ms6283 volume controller with soft step ic v1.1 13/18 www.mosanalog.com soft-step volume when the volumelevel is changed audible clicks cou ld appear at the output. the root cause of those cl icks could be the sudden change of the envelope of the audio signal. with the softstep feature, this click could be red uced to a minimum. softstep supports n db volume change, including mu te. example soft-step time = 5.12ms 0db -16db 0db vin = 1vrms @ 1khz vin = 1vrms @ 2khz
mo sa ms6283 volume controller with soft step ic v1.1 14/18 www.mosanalog.com +8db -16db +8db vin = 0.5vrms @ 1khz 0db mute 0db vin = 1vrms @ 1khz
mo sa ms6283 volume controller with soft step ic v1.1 15/18 www.mosanalog.com application information basic application example(single-ended mode) basic application example(differential mode)
mo sa ms6283 volume controller with soft step ic v1.1 16/18 www.mosanalog.com basic application flowchart [volume down to mute] volume down to mute step by step [power down preparation] 07h, 00h wait 0.5 sec [power off] v dd = 0v [all device power down] 07h, 06h power off power up [initial conditions] in3, 14db, mute powerdown, vref = 0v [pop noise free] wait 0.5 sec [set the default function] (soft-step time,on/off differential input on/off input selection , gain) [power up] v dd = 5v [all device active] 07h,01h wait 0.5 sec [volume control] volume up/down
mo sa ms6283 volume controller with soft step ic v1.1 17/18 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 ? symbol dimension in mm dimension in inch 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 symbol dimension in mm dimension in inch 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
mo sa ms6283 volume controller with soft step ic v1.1 18/18 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

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