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1/15 www.rohm.com 2010.10 - rev. a ? 2010 rohm co., ltd. all rights reserved. sound processors for boom box / mini-component stereo sound processors with built-in 3-band equalizers BD3403FV, bd3861fs, bd3883fs description the sound processor has a built-in 3 band equalizer and can be controlled with a 2-wire serial. it is suited for a sound quality design which incorporates various functions, ranging from source selectors, such as boom box, mini-audio systems and micro-audio systems to preamplif iers at the front stage of the power amp. features 1) high s/n, achieved by implementing 2-stage configuration of front volume and rear volume. 2) provides surround and rear volume with soft-switch to reduce a shock sound during switching functions(bd3883fs). 3) volume and tone implemented with the resistance ladder circuit (to achieve high performance with low noise and low distortion). 4) uses the bicmos process that ac hieves low-consumption current, which c ontributes to an energy-saving design. using the bicmos process, has the advantage in quality over the scaling down of the internal regulators and heat controls. 5) ssop-a32 and ssop-b40 are used for t he packages. input pins and output pins are organized and separately laid out so as to keep the signal flows in one direction wh ich consequently, simplify pattern layout of the set board and decrease the board dimensions. applications boom box, mini-audio system s, and micro-audio systems. product lineup parameter BD3403FV bd3861fs bd3883fs operating voltage range 6.5 to 9. 5v 6.5 to 9.5v 6.5 to 9.5v equalizer 3 band (bass, middle, treble) 3 band (bass, middle, treble) 3 band (bass, middle, treble) front volume 0 to -30db/2db step 0 to -50db/2db step -50 to -70db/4db step, - db 0 to -87db/1db step, - db rear volume 0 to -59db/1db step, - db 0 to -59db/1db step, - db 0, -10db input gain 0 to 26db/2db step 0 to 26db/2db step 0, 6, 12, 16, 20, 23, 26, 29db microphone input ? surround ? package ssop-b40 ssop-a32 ssop-a32 absolute maximum ratings (ta=25 ) prameter symbol ratings unit BD3403FV bd3861fs,bd3883fs power supply voltage vcc 10 10 v power dissipation pd 900 *1 950 *2 mw input voltage range vin gnd-0.3 to vcc+0.3 gnd-0.3 to vcc+0.3 v operating temperature range t opr -25 to +75 -25 to +75 storage temperature range tstg -55 to +125 -55 to +125 *1 reduced by 9.0 mw/ over 25 , when installed on the standard board (size: 70701.6mm) for (BD3403FV). *2 reduced by 9.5 mw/ over 25 , when installed on the standard board (s ize:70701.6mm) for (bd3861fs,bd3883fs). operating voltage range prameter symbol ratings unit BD3403FV vcc 6.5 to 9.5 v bd3861fs bd3883fs no.10086eat01
technical note 2/15 www.rohm.com 2010.10 - rev. a ? 2010 rohm co., ltd. all rights reserved. BD3403FV,bd3861fs,bd3883fs electrical characteristics BD3403FV v cc =9v, f=1khz, vin=1vrms, rg=600 ? , rl=10k ? , ta=25 , input gain=0db, vol=0db, bass, middle, treble=0db, surround=off, unless otherwise noted. parameter symbol limits unit condition min. typ. max. total circuit current iq - 16.0 30.0 ma at no signal output voltage gain gv -1.5 0.0 1.5 db gv ? 20log(vout/vin) total harmonic distortion ratio thd - 0.02 0.08 % 400 to 30khz bpf maximum output voltage vom 2.0 2.5 - vrms thd ? 1% output noise voltage vno - 1.8 6.0 vrms rg ? 0k , ihf-a cross-talk between channels ct - 3.0 9.0 vrms rg ? 0k , ihf-a input 6dbsw gain gv6 5 6 7 db vin ? ? 20log(vout/vin) input voltage gain 1 gvmaxi1 -1 *2 +1 db vin ? ? ? 20log(vout/vin) input gain switching step gvmaxist - 2 - db from 0 to 26db input total harmonic distortion ratio thdi - 0.02 0.08 % 400 to 30khz bpf input maximum output voltage vomi 2.0 2.5 - db thd ? 1% cross-talk between selectors cs - -80.0 -70.0 db rg=0k , ihf-a cs ? 20log(vout/vin) input impedance ri 35.0 50.0 65.0 k ri ? 51kvout/ (vin-vout) e input sw attenuation gre - -20.0 -15.0 db gre ? 20log(vout/vin) input volume input volume 1 giv1 -2 *3 +2 db from 0 to -30db giv1 ? 20log(vout/vin) volume switching step 1 givst1 - 2 - db from 0 to -30db output volume output volume gov -1 *1 +1 db from 0 to ? 59db gov=20log(vout/vin) output switching step govst - 1 - db from 0 to ?59db maximum attenuation gmino - - -90.0 db ihf-a, gmino=20log(vout/vin) surround surround gain ch1 ch2 gsur1 5 7 9 db v in =200mvrms, f=1khz surround gain ch2 ch1 gsur2 5 7 9 db v in =200vrms, f=1khz bass bass boost gain gbb -2 *1 +2 db v in =200mvrms, f=90hz, from 0 to 14db gbb=20log(vout/vin) bass cut gain gbc -2 *1 +2 db v in =200mvrms, f =90hz, from ?14 to 0db gbc=20log(vout/vin) bass switching step gbst - 2 - db v in =200mvrms, f=90hz middle middle boost gain gmb -2 *1 +2 db v in =200mvrms, from 0 to 12db gmb=20log(vout/vin) middle cut gain gmc -2 *1 +2 db v in =200mvrms, from -12 to 0db gmc=20log(vout/vin) middle switching step gmst - 2 - db v in =200mvrms treble treble boost gain gtb -2 *1 +2 db v in =200mvrms, f=10khz from 0 to 12db gtb=20log(vout/vin) treble cut gain gtc -2 *1 +2 db v in =200mvrms, f=10khz from -12 to 0db gtc=20log(vout/vin) treble switching step gtst - 2 - db v in =200mvrms, f=10khz mic microphone voltage gain gmic 4.5 6.0 7.5 db v in =200mvrms gmic=20log(vout/vin) *1 *2 typ. is set to the value descrived in condition. min. and max. mean the error.
technical note 3/15 www.rohm.com 2010.10 - rev. a ? 2010 rohm co., ltd. all rights reserved. BD3403FV,bd3861fs,bd3883fs ? bd3861fs vcc=9v, f=1khz, vin=1vrms, rg=600 ? , rl=10k ? , ta=25 , input gain=0db, vol=0db, bass, middle, treble=0db, unless otherwise noted. parameter symbol limits unit condition min. typ. max. total circuit current iq - 13.0 26.0 ma at no signal output voltage gain gv -1.5 0.0 1.5 db gv=20log(vout/vin) total harmonic distortion thd - 0.02 0.08 % 400 to 30khz bpf maximum output voltage vom 2.0 2.5 - vrms thd=1% output noise voltage vno - 8.0 15.0 vrms rg=0k , ihf-a cross-talk between channels ct - -80 -70 db rg=0k , ihf-a input 6db sw gain gv6 5 6 7 db vin=200mvrms gv6=20log(vout/vin) input voltage gain 1 gvmaxi1 -1 *1 +1 db vin=200mvrms from 0 to 10db gvmaxi1=20log(vout/vin) input voltage gain 2 gvmaxi2 -1.5 *1 +1.5 db vin=200mvrms, from 12 to 26db gvmaxi2=20log(vout/vin) input gain switching step gvmaxist - 2 - db from 0 to 26db input total harmonic distortion thdi - 0.02 0.08 % 400 to 30khz bpf input maximum output voltage vomi 2.0 2.5 - db thd=1% cross-talk between selectors cs - -80.0 -70.0 db rg=0k , ihf-a cs=20log(vout/vin) input impedance ri 35.0 50.0 65.0 k ri=51kvout/ (vin-vout) e input sw attenuation gre - - 20.0 -15.0 db gre=20log(vout/vin) input volume input volume 1 giv1 -2 *1 +2 db from 0 to -50db giv1=20log(vout/vin) input volume 2 giv2 -3 *1 +3 db from -54 to ? 70db giv2=20log(vout/vin) volume switching step 1 givst1 - 2 - db from 0 to -50db volume switching step 2 givst2 - 4 - db from -54 to ?70db maximum attenuation gmini - - -90.0 d b ihf-a, gmini=20log(vout/vin) output volume output volume gov -1 *1 +1 db from 0 to ? 59db gov=20log(vout/vin) output switching step govst - 1 - db from 0 to ?59db maximum attenuation gmino - - -90.0 db ihf-a gmino=20log(vout/vin) bass bass boost gain gbb -2 *1 +2 db vin=200mvrms, f=90hz, from 0 to 14db gbb=20log(vout/vin) bass cut gain gbc -2 *1 +2 db vin=200mvrms, f =90hz, from -14 to 0db gbc=20log(vout/vin) bass switching step gbst - 2 - db vin=200mvrms, f=90hz middle middle boost gain gmb -2 *1 +2 db vin=200mvrms, from 0 to 12db gmb=20log(vout/vin) middle cut gain gmc -2 *1 +2 db vin=200mvrms, from -12 to 0db gmc=20log(vout/vin) middle switching step gmst - 2 - db vin=200mvrms treble treble boost gain gtb -2 *1 +2 db vin=200mvrms, f=10khz from 0 to 12db gtb=20log(vout/vin) treble cut gain gtc -2 *1 +2 db vin=200mvrms, f=10khz from -12 to 0db gtc=20log(vout/vin) treble switching step gtst - 2 - db vin=200mvrms, f=10khz mic microphone voltage gain gmic 4.5 6.0 7.5 db vin=200mvrms gmic=20log(vout/vin) *1 typ. is set to the value descrived in condition. min. and max. mean the error.
technical note 4/15 www.rohm.com 2010.10 - rev. a ? 2010 rohm co., ltd. all rights reserved. BD3403FV,bd3861fs,bd3883fs ? bd3883fs ta = 2 5 , vcc=8v, f=1khz, vi=200mvrms, rl=10k ? , rg=600 ? , input selector=ach, input gain=0db, volu me=0db, bass=0db, middle=0db, treble=0db, surround=off, recout=off, unless otherwise noted. parameter symbol limits unit condition min. typ. max. total circuit current iq - 8 21 ma at no signal total output voltage gain gv -2 0 2 db total harmonic distortion thdo - 0.01 0.1 % bw=400 to 30khz maximum output voltage vomaxo 1.6 2.1 - vrms thd=1% bw=400 to 30khz total residual noise voltage vno - 2 10 vrms rg=0 , vol=- db bw=ihf-a, rear att=-10db total output noise voltage vmno - 4 15 vrms rg=0 , vol=0db bw=ihf-a cross-talk between channels ctc12 - -80 -70 db rg=0 , bw=ihf-a vout=1vrms input impedance rin 70 100 130 k output impedance rout - - 50 input cross-talk between selectors cts1 - -80 -70 db vout=1vrms rg=0 , bw=ihf-a volume volume control range vri -90 -8 7 -84 db bw=ihf-a ,vout=1vrms volume setting error 1 vei1 -2 0 2 db 0 to -53db,bw=ihf-a vout=1vrms volume setting error 2 vei2 -3 0 3 db -54 to ?87db,bw=ihf-a vout=1vrms maximum attenuation vmin - - -90 db bw=ihf-a vout=1vrms volume input impedance rvin 39 56 73 k bass bass gain gb -17.5 to +17.5 db bass gain setting error be -2.5 0 -2.5 db middle middle gain gm -14 to +14 db middle gain setting error me -2 0 -2 db treble treble gain gt -14 to +14 db treble gain setting error te -2 0 2 db surround surround in-phase gain vsur1 -2 0 2 db surround single-phase gain vsur2 4.3 6.3 8.3 db ac-grounding opposite-phase gain vsur3 8 10 12 db this ic is not designed to be radiation-resistant.
technical note 5/15 www.rohm.com 2010.10 - rev. a ? 2010 rohm co., ltd. all rights reserved. BD3403FV,bd3861fs,bd3883fs control signal specifications 1. signal timing conditions ? data is read on the rising edge of the clock. ? latch is read on the falling edge of the clock. ? latch signal must terminate with the low state. ? to avoid malfunctions, clock and data signals must terminate with the low state. 1byte=8bit fig.1 parameter symbol limits unit min. typ. max. minimum clock width twc 2.0 - - s minimum data width twd 2.0 - - s minimum latch width tw1 2.0 - - s data set-up time (data ? clk) tsd 1.0 - - s data hold time (clk ? data) thd 1.0 - - s latch set-up time (clk ? latch) ts1 1.0 - - s latch hold time (data ? latch) th1 1.0 - - s latch low set-up time ts 1.0 - - s latch low hold time th 1.0 - - s 2. voltage conditions for control signals (BD3403FV, bd3861fs) parameter condition limits unit min. typ. max. ?h? input voltage vcc=6.5 to 9.5v 2.6 - 5.5 v ?l? input voltage vcc=6.5 to 9.5v 0 - 1.1 v 3. voltage conditions for control signals (bd3883fs) parameter condition limits unit min. typ. max. ?h? input voltage vcc=6.5 to 9.5v 2.2 - 5.5 v ?l? input voltage vcc=6.5 to 9.5v 0 - 1.0 v sc (clock) si data latch thd thd th ts ts1 th1 tsd twc twd twd tw1 tsu data data latch 90% 90% 90% 90% 10% 10% 10% 90% 90% 90% 90% 90% 10% 10% 10% twc low
technical note 6/15 www.rohm.com 2010.10 - rev. a ? 2010 rohm co., ltd. all rights reserved. BD3403FV,bd3861fs,bd3883fs control data format list (BD3403FV) address 1 d10 d11 d12 d13 d14 d15 d16 d17 output volume 1 output volume 2 function select 0 0 address 2 d20 d21 d22 d23 d24 d25 d26 d27 input volume surround 0:off 1:on function select 0 1 0 address 3 d30 d31 d32 d33 d34 d35 d36 d37 input selector 6db sw 0: 0db 1:+6db in e mute 0:off 1:on function select 0 0 1 address 4 d40 d41 d42 d43 d44 d45 d46 d47 input gain/bass 0: input gain 1: bass function select 1 0 1 address 5 d50 d51 d52 d53 d54 d55 d56 d57 middle/treble 0: middle 1: treble function select 0 1 1 (bd3861fs) address 1 d10 d11 d12 d13 d14 d15 d16 d17 output volume output volume 2 function select 0 0 address 2 d20 d21 d22 d23 d24 d25 d26 d27 input volume function select 0 1 0 address 3 d30 d31 d32 d33 d34 d35 d36 d37 input selector 6dbsw 0: 0db 1:+6db in e mute 0:off 1:on function select 0 0 1 address 4 d40 d41 d42 d43 d44 d45 d46 d47 input gain/bass 0: input gain 1: bass function select 1 0 1 address 5 d50 d51 d52 d53 d54 d55 d56 d57 middle/treble 0: middle 1: treble function select 0 1 1
technical note 7/15 www.rohm.com 2010.10 - rev. a ? 2010 rohm co., ltd. all rights reserved. BD3403FV,bd3861fs,bd3883fs (bd3883fs) ? basic configuration of control data format ? data input direction msb lsb data d9 d8 d7 d6 d5 d4 d3 d2 d1 d0 data select address ? control data formats ? data input direction select address data(1) d9 d8 d7 d6 d5 d4 d3 d2 d1 d0 input gain input selector treble fc 0 0 data(2) d9 d8 d7 d6 d5 d4 d3 d2 d1 d0 front volume a front volume b * 0 1 data(3) d9 d8 d7 d6 d5 d4 d3 d2 d1 d0 bass gain treble gain 1 0 data(4) d9 d8 d7 d6 d5 d4 d3 d2 d1 d0 middle gain time constan t select rec out surroun d rear volume 1 1 * indicates 0 or 1. ? by changing the setting of select address, four di fferent control formats are selectable. (bd3883fs) ? at power-on sequence, initialize all data. example: ? data input direction msb lsb msb lsb msb lsb msb lsb data(1) l data(2) l data(3) l data(4) l ?l? means a ?latch.? ? after power-on, for the second and subsequent times, only the necessary data can be selected for setting. example: when changing the volume: ? data input direction msb lsb data(2) l ?l? means a ?latch.? ? recout, surround and rear volume in data(4) are soft-switched using time constants. (bd3883fs)
technical note 8/15 www.rohm.com 2010.10 - rev. a ? 2010 rohm co., ltd. all rights reserved. BD3403FV,bd3861fs,bd3883fs block diagram, application circuit, pin assignment (BD3403FV) unit resistance : capacitance : f fig.2 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 21 1 2 3 4 5 6 7 8 9 1011121314151617181920 bass2 fo=90hz bass1 fo=90hz middle1 fo=1khz middle2 fo=1khz treble2 fc=10khz treble1 fc=10khz 0db -30db vcc/2 vcc/2 25k 25k 25k 25k 25k 25k 25k 25k 25k 25k 25k vcc/2 100k logic 25k 25k 25k 25k 25k 25k 25k 25k 25k surround 026db 2db/step 026db 2db/step treble -12db+12db 2db/step middle -12db +12db 2db/step bass -14db+14db 2db/step 0db-59db 1db/step mute + - + - + - + - vcc + - 10 + 10 + + + 3.3k 0.15 0.15 3.3k 0.15 0.15 4700p 4700p 1 2.2k + + 10 10 + 10 + 10 + 10 + 10 + 10 + 10 + 10 + 10 47 + + 10 4.7k + 10 4.7k + 10 10 10 3.3k 0.015 0.015 3.3k 0.015 0.015 + 47
technical note 9/15 www.rohm.com 2010.10 - rev. a ? 2010 rohm co., ltd. all rights reserved. BD3403FV,bd3861fs,bd3883fs (bd3861fs) unit resistance : capacitance : f fig.3 17 18 19 20 21 22 23 24 25 26 27 28 29 30 32 31 treble2 f c =10khz middle1 f 0 =1khz middle2 f 0 =1khz out2 vcc/2 vcc/2 16 15 14 13 12 11 10 9 8 7 6 5 4 3 1 2 data latch clook e2 4.7k e1 d2 d1 c2 c1 b2 b1 a2 a1 vcc logic vcc/2 vcc/2 out1 10 10 bass2 f 0 =90hz treble1 f c =10khz 47 10 4.7k 10 10 10 10 10 10 10 10 10 10 10 3.3k 0.15 vcc/2 0db -59db vcc/2 0db -59db bass1 f 0 =90hz 0.15 3.3k 0.15 0.15 3.3k 0.015 0.015 3.3k 0.015 0.015 4700p 4700p 0db -70db mic 100k 12k 24k 25k 25k 25k 25k 25k 25k 25k 25k 25k 25k 25k 25k 25k 25k 25k 25k 25k 25k 25k 25k + 10 + 47 vcc/2 vcc/2 vcc/2 vcc/2
technical note 10/15 www.rohm.com 2010.10 - rev. a ? 2010 rohm co., ltd. all rights reserved. BD3403FV,bd3861fs,bd3883fs (bd3883fs) when using recout: unit resistance: capacitor: f fig.4 0.22 17 18 19 20 21 30 31 32 22 23 24 27 28 25 26 29 16 15 14 12 3 2 1 11 10 9 8 7 6 5 4 13 logic vcc/2 vcc/2 vcc/2 vcc/2 surround 0db - 87db - vcc/2 0db - 87db - middle1 f 0 =1khz treble1 fc=8.15khz vcc/2 vin sel vin2 sel2 a a2 b b2 c c2 d d2 e e2 filter sc si vcc cap out2 bout2 bnf2 bout1 bnf1 mout2 mnf2 mout1 mnf1 rec2 rec1 vcc 0.33 4.7k 4.7k 5.6k 5.6k 5.6k 0.1 0.1 5.6k 0.1 0.1 4.7 4.7 0.01 0.01 0.01 0.22 0.1 0. 1 0.1 0.1 0.1 0.1 0.1 0.1 0.1 10 bass2 f 0 =80hz out1 att 0,-10db 100k 100k 100k 100k 100k 100k 100k 100k 65k 35k 65k 35k 4.7 4.7 treble1 fc=8.15khz middle1 f 0 =1khz bass1 f 0 =80hz att 0,-10db 0.01 0.1 0,6,12,16,20,23,26,29db 0,6,12,16,20,23,26,29db gnd
technical note 11/15 www.rohm.com 2010.10 - rev. a ? 2010 rohm co., ltd. all rights reserved. BD3403FV,bd3861fs,bd3883fs (bd3883fs) when using 2ndhpf: unit resistance: capacitor:f fig.5 56k 56k 0.1 17 18 19 20 21 30 31 32 22 23 24 27 28 25 26 29 16 15 14 12 3 2 1 11 10 9 8 7 6 5 4 13 logic vcc/2 vcc/2 vcc/2 vcc/2 surround vcc/2 0db - -87db - - middle1 f0=1khz treble1 fc=8.15khz vcc/2 vin 1 sel 1 vin2 sel a a2 b b2 c c2 d d2 e e2 filt er gnd sc si vcc cap out2 bout bnf2 bout1 bnf1 mout2 mnf2 mout1 mnf1 rec2 rec1 vcc 0.33 4.7k 5.6k 5.6k 5.6k 5.6k 4.7 4.7 10 bass2 f0=80hz out1 att 0,-10db 100k 100k 100k 100k 100k 100k 100k 100k 65k 35k 65k 35k treble2 fc=8.15khz middle2 f0=1khz bass1 f0=80hz att 0,-10db 0,6,12,16,20,23,26,29d 0,6,12,16,20,23,26,29d b 0db -87db - 0.1 0.1 0.1 0.1 0.1 0.1 0.1 0.1 0.1 0.1 0.1 4.7k 0.1 0.01 0.1 0.1 0.1 0.1 0.01 0.01 0.01
technical note 12/15 www.rohm.com 2010.10 - rev. a ? 2010 rohm co., ltd. all rights reserved. BD3403FV,bd3861fs,bd3883fs 0 5 10 15 0246810 vcc(v) icc(ma) 0 5 10 15 0246810 vcc(v) icc(ma) -10 -8 -6 -4 -2 0 2 4 6 8 10 10 100 1000 10000 100000 frequency(hz) gain(db) 0.001 0.01 0.1 1 10 0.001 0.01 0.1 1 10 input voltage(vrms) output voltage(vrms) 0.01 0.1 1 10 0.001 0.01 0.1 1 10 output voltage(vrms) thd+n(%) 0.001 0.01 0.1 1 10 0.001 0.01 0.1 1 10 output voltage(vrms) thd+n(%) -15 -10 -5 0 5 10 15 10 100 1000 10000 100000 frequency(hz) gain(db) +14db -14db -14db +14db 2db/step -15 -10 -5 0 5 10 15 10 100 1000 10000 100000 frequency(hz) gain(db) +12db -12db -12db +12db 2db/step -15 -10 -5 0 5 10 15 10 100 1000 10000 100000 frequency(hz) gain(db) +12db -12db -12db +12db 2db/step 0 2 4 6 8 10 12 14 16 10 100 1000 10000 100000 frequency(hz) gain(db) 4.68khz 5.64khz 6.67kh 8.15kh -18 -16 -14 -12 -10 -8 -6 -4 -2 0 2 10 100 1000 10000 10000 0 frequency(hz) gain(db) fig.6 circuit current ? supply voltage (BD3403FV) fig.7circuit current ? supply voltage (bd3883fs) fig.8 voltage gain - frequency fig.9 output voltage - input voltage fig.10 total harmonic distortion ratio - output voltage (BD3403FV, bd3861fs) fig.11total harmonic distortion ratio - output voltage (bd3883fs) fig.12 bass gain - frequency BD3403FV, bd3861fs fig.13 middle gain - frequency (BD3403FV, bd3861fs) fig.14 treble gain - frequency (BD3403FV, bd3861fs) fig.15 variable treble cut-off frequency (bd3883fs) fig.16 2ndhpf - frequency (bd3883fs) reference data
technical note 13/15 www.rohm.com 2010.10 - rev. a ? 2010 rohm co., ltd. all rights reserved. BD3403FV,bd3861fs,bd3883fs notes for use 1) numbers and data in entries are representative desi gn values and are not guaranteed values of the items. 2) although rohm is confident that the example application circuit reflects the best possible recommendations, be sure to verify circuit characteristics for your particular application. modification of constants for other externally connected circui ts may cause variations in both static and transient characteristics for external components as well as this rohm ic. allow for sufficient margins when determining circuit constants. 3) absolute maximum ratings use of the ic in excess of absolute maximum ratings, such as the applied voltage or operating temperature range (topr), may result in ic damage. assumptions should not be made re garding the state of the ic (short mode or open mode) when such damage is suffered. a physical safety measure, such as a fuse, should be implemented when using the ic at times where the absolute maximum ratings may be exceeded. 4) gnd potential ensure a minimum gnd pin potential in all operating conditions . make sure that no pins are at a voltage below the gnd at any time, regardless of whether it is a transient signal or not. 5) thermal design perform thermal design, in which there are adequate margins, by taking into account the permissible dissipation (pd) in actual states of use. 6) short circuit between terminals and erroneous mounting pay attention to the assembly direction of the ics. wrong m ounting direction or shorts between terminals, gnd, or other components on the circuits, can damage the ic. 7) operation in strong electromagnetic field using the ics in a strong electromagnetic field can cause operation malfunction. 8) 2-wire serial control because sc and si terminals are designed for inputting high-fr equency digital signals, wiring and layout patterns should be routed as not to cause interference with the analog-signal-related lines. 9) e input external resistance (bd3883fs) to avoid a sudden noise into e input, external resistance (4.7k ) should be connected as close as possible to the ic terminal. 10) function switching action to absorb shock sounds is taken when switching between the volume, treble, middle and bass functions. 11) power-on reset (bd3883fs) a built-in circuit for performing initialization inside the ic at power-on is provided. specific ally, the initial states are s et as described in the table below. in the case of the setting design, however, to be on the safe side, it is recommended that data shall be sent to all the addresses as initial data at power-on and, until this sending operation is completed, mute shall be applied. to avoid malfunctions, serial data signals must be set to the low state at power-on/off. function initial state input selector mute input gain 0 db recout off volume ? db surround off treble 0 db middle 0 db bass 0 db rear volume 0db 12) step switching noise (bd3883fs) for surround and rear volume, an external capacitor c is atta ched to the cap pin to control the switching step noise. in the application circuit, a constant value, as an example, is shown by the cap pin. the time constant for charge/discharge of the capacitor c (varying between vbe to 5vbe (2.65v)) controls the slow switching operation. the switching time constant t is calculated as the follows: t=2.55 10 5 c vbe has temperature characterist ics and may affect the value of the time constant t.
technical note 14/15 www.rohm.com 2010.10 - rev. a ? 2010 rohm co., ltd. all rights reserved. BD3403FV,bd3861fs,bd3883fs 13) input selector and input gain when changing input selector or input gain, the soft-switchi ng is not applied. therefore, it is recommended to implement the mute function. ? mute setting example fig.17 14) constraints of serial control (bd3883fs) on soft-switching of the recout, surround, and rear volume f unctions, data must not be sent serially to the functions before the switching operation is completed. fig.18 15) function setting while muting volume (bd3883fs) while muting volume, to avoid increasing residual noise, se t bass, middle and treble to 0db, surround to off, and rear volume to -10db. mute serial data 40 60ms serial data input source switching if the function for soft-switch should serially send the data (data(4)) on the same select address, the time interv al between the send operations must be set to 500 -600msec. data(4) t data(4) direction l=on h=off
technical note 15/15 www.rohm.com 2010.10 - rev. a ? 2010 rohm co., ltd. all rights reserved. BD3403FV,bd3861fs,bd3883fs ordering part number b d 3 4 0 3 f v - e 2 part no. part no. 3403 3861,3883 package fv: ssop-b40 fs: ssop-a32 packaging and forming specification e2: embossed tape and reel ? order quantity needs to be multiple of the minimum quantity. embossed carrier tape tape quantity direction of feed the direction is the 1pin of product is at the upper left when you hold reel on the left hand and you pull out the tape on the right hand 2000pcs e2 () direction of feed reel 1pin (unit : mm) ssop-a32 1 17 16 32 0.11 0.3min 0.36 0.1 0.8 13.6 0.2 0.15 0.1 5.4 0.2 7.8 0.3 1.8 0.1 (max 13.95 include burr) 0.1 (unit : mm) ssop-b40 0.08 m 0.1 s 0.22 0.1 0.65 0.15 0.1 0.5 0.2 7.8 0.3 5.4 0.2 1.8 0.1 0.1 1 40 20 21 13.6 0.2 (max 13.95 include burr) ? order quantity needs to be multiple of the minimum quantity. embossed carrier tape tape quantity direction of feed the direction is the 1pin of product is at the upper left when you hold reel on the left hand and you pull out the tape on the right hand 2000pcs e2 () direction of feed reel 1pin
r1010 a www.rohm.com ? 2010 rohm co., ltd. all rights reserved. notice rohm customer support system http://www.rohm.com/contact/ thank you for your accessing to rohm product informations. more detail product informations and catalogs are available, please contact us. notes no copying or reproduction of this document, in part or in whole, is permitted without the consent of rohm co.,ltd. the content specied herein is subject to change for improvement without notice. the content specied herein is for the purpose of introducing rohm's products (hereinafter "products"). if you wish to use any such product, please be sure to refer to the specications, which can be obtained from rohm upon request. examples of application circuits, circuit constants and any other information contained herein illustrate the standard usage and operations of the products. the peripheral conditions must be taken into account when designing circuits for mass production. great care was taken in ensuring the accuracy of the information specied in this document. however, should you incur any damage arising from any inaccuracy or misprint of such information, rohm shall bear no responsibility for such damage. the technical information specied herein is intended only to show the typical functions of and examples of application circuits for the products. rohm does not grant you, explicitly or implicitly, any license to use or exercise intellectual property or other rights held by rohm and other parties. rohm shall bear no responsibility whatsoever for any dispute arising from the use of such technical information. the products specied in this document are intended to be used with general-use electronic equipment or devices (such as audio visual equipment, ofce-automation equipment, commu- nication devices, electronic appliances and amusement devices). the products specied in this document are not designed to be radiation tolerant. while rohm always makes efforts to enhance the quality and reliability of its products, a product may fail or malfunction for a variety of reasons. please be sure to implement in your equipment using the products safety measures to guard against the possibility of physical injury, re or any other damage caused in the event of the failure of any product, such as derating, redunda ncy, re control and fail-safe designs. rohm shall bear no responsibility whatsoever for your use of any product outside of the prescribed scope or not in accordance with the instruction manual. the products are not designed or manufactured to be used with any equipment, device or system which requires an extremely high level of reliability the failure or malfunction of which may result in a direct threat to human life or create a risk of human injury (such as a medical instrument, transportation equipment, aerospac e machinery, nuclear-reactor controller, fuel- controller or other safety device). rohm shall bear no responsibility in any way for use of any of the products for the above special purposes. if a product is intended to be used for any such special purpose, please contact a rohm sales representative before purchasing. if you intend to export or ship overseas any product or technology specied herein that may be controlled under the foreign exchange and the foreign trade law, you will be required to obtain a license or permit under the law.

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