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NJU7391 ? 1 ? 2-channel audio processor with eala surround general description package outline the NJU7391 is a 2-channel audio processor with 5-in 1-out stereo audio selector, 2-band tone control and eala surround. the NJU7391 performs low noise and low distortion characteristics with resistance ladder circuit. all of functions are controlled via three-wired serial bus. features operating voltage + 4.7 to + 9.7v three-wired serial bus low output noise -110dbvtyp. low thd 0.002%typ. (vin=1vrms, vol=0db) 0.010%typ. (vin=2vrms, vol=0db) input selector(x5) input gain 0 to + 14db/2dbstep volume 0 to -95.0db / 1dbstep, mute tone control 0 to 14db/2dbstep eala surround 3-level effects cmos technology package outline ssop32 block diagram NJU7391v 32 31 30 27 26 25 24 23 29 28 20 19 18 17 22 21 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 bias + + + + + + + + + + input(ach) input(bch) tre vol bass tre bass vol + + output(bch) output(ach) 3-wire eala + v+ digi v+ ana 1uf 1uf 6.8nf 47nf 220nf 5.6k 4.7nf 4.7uf 1uf 1uf 6.8nf 47nf 220nf 5.6k 4.7nf 4.7uf 4.7uf da ta clock latch v+ gnd ana gnd digi 100uf
NJU7391 ? 2 ? pin configuration ssop32 no. symbol function no symbol function 1 in1a ach input1 terminal 17 latch 3-wired latch input terminal 2 in2a ach input2 terminal 18 v+ a analog supply terminal 3 in3a ach input3 terminal 19 v+ d digital supply terminal 4 in4a ach input4 terminal 20 vref reference voltage terminal 5 in5a ach input5 terminal 21 outb bch output terminal 6 selouta ach selector output terminal 22 srb bch surround filter terminal 7 vol1a ach volume input terminal 23 tone-dbb bch bass(tone) filter terminal 8 tone-ha ach treble(tone) filter terminal 24 tone-bb bch bass(tone) filter terminal 9 tone-ba ach bass(tone) filter terminal 25 tone-hb bch treble(tone) filter terminal 10 tone-dba ach bass(tone) filter terminal 26 vol1b bch volume input terminal 11 sra ach surround filter terminal 27 seloutb bch selector output terminal 12 outa ach output terminal 28 in5b bch input5 terminal 13 gnd d digital ground terminal 29 in4b bch input4 terminal 14 gnd a analog ground terminal 30 in3b bch input3 terminal 15 data 3-wired data input terminal 31 in2b bch input2 terminal 16 clock 3-wired clock input terminal 32 in1b bch input1 terminal 2 3 4 5 6 7 8 9 10 11 12 13 14 15 1 30 29 28 27 26 in1 a in2 a in3 a selout a vol1 a in4 a in5 a tone-h a tone-b a tone-db a sr a out a gnd d gnd a dat a in1b in2b in3b seloutb vol1b in5b tone-hb tone-bb tone-dbb srb 25 24 23 22 21 outb vref v+ d v+ a 20 19 18 17 32 in4b 16 clock latch 31
NJU7391 ? 3 ? absolute maximum rating (ta=25 c) parameter symbol rating unit power supply voltage v + 10 (note1) v power dissipation p d 800 (note2) mw maximum input voltage v imax 0 ~ v + (note3) v operating temperature range topr -40 ~ +85 c storage temperature range tstg -40 ~ +125 c (note1) pay attention to supply voltage not to exceed the absolute maximum power supply voltage by spike noise etc. because the difference between the absolute maximum power supply voltage and the operating voltage is small. (note2) eia/jedec standard test board (76.2x114.3x1.6mm, 2layer, fr-4) mounting (note3) don?t apply the input voltage that exceeds supply voltage. electrical characteristics (ta=25 c,v + =9v,rl=47k ? ,vin=100mvrms/1khz,vol=0db,tone=off,sur=off) parameter symbol test condition min. typ. max. unit operating voltage v + 4.7 9.0 9.7 v supply current i dd no signal - 10 18 ma reference voltage v ref no signal 3.5 4.0 4.5 v input impedance r in - 60 - k ? output impedance r out - 200 - ? maximum input voltage v im vol=0db,thd=1% - 3.0 - vrms maximum output voltage v om output vol=0db,thd=1% - 3.0 - vrms maximum gain g vmax vol=0db -1.0 0 1.0 db minimum gain g vmin v in =1vrms, vola/b=mute - -100 -90 db maximum input gain g vinmax gvin=?111?(+14db) - 14 - db channel balance g cb vol=0db -1 0 1 db cross talk ct v in =1vrms selected input : 0 ? unselected input : signal - - -80 db channel separation cs v in =1vrms - - -80 db total harmonic distortion 1 thd+n1 v o =1vrms, bw=400hz-30khz - 0.002 0.01 % total harmonic distortion 2 thd+n2 v o =2vrms, bw=400hz-30khz - 0.01 - % output noise v no rg=0 ? , a-weight - -110 -97 dbv tone control characteristics parameter symbol test condition min. typ. max. unit high frequency boost hf bst bct=?1?,treb=?111?, f=10khz 11.5 14.0 16.5 db high frequency cut hf cut bct=?0?,treb=?111?, f=10khz -16.5 -14.0 -11.5 db low frequency boost lf bst bcb=?1?,bass=?111?, f=100hz 11.5 14.0 16.5 db low frequency cut lf cut bcb=?0?,bass=?111?, f=100hz -16.5 -14.0 -11.5 db
NJU7391 ? 4 ? surround (eala) characteristics parameter symbol test condition min. typ. max. unit surround 1 sur 1 sur=?01?, f=100hz, ain-aout 1.6 3.6 5.6 db surround 2 sur 2 sur=?10?, f=100hz, ain-aout 4.3 6.3 8.3 db surround 3 sur 3 sur=?11?, f=100hz, ain-aout 6.6 8.6 10.6 db surround 4 sur 4 sur=?11?, f=100hz, ain-bout 2.8 4.8 6.8 db logic control characteristics parameter symbol test condition min. typ. max. unit high level input voltage v ih data,clock,latch 2.6 - 5.5 v low level input voltage v il data,clock,latch 0 - 1.0 v
NJU7391 ? 5 ? ! ! ! ! control data format ( ? ) msb first symbol parameter min typ max unit t1 clock clock width 4 - - sec t2 clock pulse width (high) 2 - - sec t3 clock pulse width (low) 2 - - sec t4 latch rise hold time 4 - - sec t5 data setup time 1.6 - - sec t6 data hold time 1.6 - - sec t7 clock setup time 1.6 - - sec t8 latch high pulse width 1.6 - - sec ! ! ! ! control data NJU7391 control data is constructed with 16bits. msb lsb d15 d14 d13 d12 d11 d10 d9 d8 d7 d6 d5 d4 d3 d2 d1 d0 data select address chip address msb d15 d14 d13 d12 d11 d10 d9 d8 d7 d6 d5 d4 d3 d2 d1 d0 don?t care vola 0 0 0 0 0 1 0 1 don?t care volb 0 0 0 1 0 1 0 1 bcb bas bct tre 0 0 1 0 0 1 0 1 sur sel gvin 0 0 1 1 0 1 0 1 lsb ! ! ! ! initial condition msb lsb d15 d14 d13 d12 d11 d10 d9 d8 d7 d6 d5 d4 d3 d2 d1 d0 0 0 0 0 0 0 0 0 0 0 0 0 0 1 0 1 0 0 0 0 0 0 0 0 0 0 0 1 0 1 0 1 0 0 0 0 0 0 0 0 0 0 1 0 0 1 0 1 0 0 0 0 0 0 0 0 0 0 1 1 0 1 0 1 latch dat a clock d15 d14 d13 d12 d11 d10 d9 d8 d7 d6 d5 d4 d3 d2 d1 d0 msb lsb t7 t1 t2 t3 t4 t8 t5 t6
NJU7391 ? 6 ? ! ! ! ! definition of resistor volume a, volume b 0db to -95db in 1db/step. *each volume is controlled independently. d15 d14 d13 d12 d11 d10 d9 d8 d7 d6 d5 d4 d3 d2 d1 d0 don?t care vola 0 0 0 0 0 1 0 1 don?t care volb 0 0 0 1 0 1 0 1 < volume control data > data setting d14 d13 d12 d11 d10 d9 d8 1 1 1 1 1 1 1 0db ( ? ) 1 1 1 1 1 1 0 -1db 1 1 1 1 1 0 1 -2db 1 1 1 1 1 0 0 -3db 1 1 1 1 0 1 1 -4db 1 1 1 1 0 1 0 -5db 1 1 1 1 0 0 1 -6db 1 1 1 1 0 0 0 -7db 1 1 1 0 1 1 1 -8db 1 1 1 0 1 1 0 -9db 1 1 1 0 1 0 1 -10db 1 1 1 0 1 0 0 -11db 1 1 1 0 0 1 1 -12db 1 1 1 0 0 1 0 -13db 1 1 1 0 0 0 1 -14db 1 1 1 0 0 0 0 -15db 1 1 0 1 1 1 1 -16db ? ? ? ? ? ? 0 1 0 1 1 1 1 -80db 0 1 0 0 1 1 1 -88db 0 1 0 0 0 0 0 -95db 0 0 don?t care mute ( ? ) ( ? )initial setting
NJU7391 ? 7 ? _tone control d15 d14 d13 d12 d11 d10 d9 d8 d7 d6 d5 d4 d3 d2 d1 d0 bcb bas bct tre 0 0 1 0 0 1 0 1 bcb : boost cut select for bass control ?0? : cut ?1? : boost bas : bass level setting cut level : -14 to 0db (2db/step) boost level : 0 to +14db (2db/step) bct : boost cut select for treble control ?0? : cut ?1? : boost tre : bass level setting cut level : -14 to 0db (2db/step) boost level : 0 to +14db (2db/step) < tone control data > ? bas: tone-bass level data d15 d14 d13 d12 bcb bas setting 1 1 1 1 +14db 1 1 1 0 +12db 1 1 0 1 +10db 1 1 0 0 +8db 1 0 1 1 +6db 1 0 1 0 +4db 1 0 0 1 +2db 1 0 0 0 0db 0 0 0 0 0db ( ? ) 0 0 0 1 -2db 0 0 1 0 -4db 0 0 1 1 -6db 0 1 0 0 -8db 0 1 0 1 -10db 0 1 1 0 -12db 0 1 1 1 -14db ( ? )initial setting ? tre: tone-treble level data d11 d10 d9 d8 bct tre setting 1 1 1 1 +14db 1 1 1 0 +12db 1 1 0 1 +10db 1 1 0 0 +8db 1 0 1 1 +6db 1 0 1 0 +4db 1 0 0 1 +2db 1 0 0 0 0db 0 0 0 0 0db ( ? ) 0 0 0 1 -2db 0 0 1 0 -4db 0 0 1 1 -6db 0 1 0 0 -8db 0 1 0 1 -10db 0 1 1 0 -12db 0 1 1 1 -14db ( ? )initial setting
NJU7391 ? 8 ? surround(eala), input selector, input gain d15 d14 d13 d12 d11 d10 d9 d8 d7 d6 d5 d4 d3 d2 d1 d0 sur sel gvin 0 0 1 1 0 1 0 1 < surround(eala) data > data d15 d14 setting 0 0 bypass ( ? ) 0 1 surround1(min) 1 0 surround2(mid) 1 1 surround3(max) ( ? ) initial setting < input selector data > data d13 d12 d11 setting 0 0 0 input 1 ( ? ) 0 0 1 input 2 0 1 0 input 3 0 1 1 input 4 1 0 0 input 5 ( ? ) initial setting < input gain data > data d10 d9 d8 setting 0 0 0 bypass ( ? ) 0 0 1 +2db 0 1 0 +4db 0 1 1 +6db 1 0 0 +8db 1 0 1 +10db 1 1 0 +12db 1 1 1 +14db ( ? ) initial setting
NJU7391 ? 9 ? ! terminal description no. symbol function equivalent circuit voltage 1 2 3 4 5 28 29 30 31 32 in1a in2a in3a in4a in5a in5b in4b in3b in2b in1b ach input1 terminal ach input2 terminal ach input3 terminal ach input4 terminal ach input5 terminal bch input5 terminal bch input4 terminal bch input3 terminal bch input2 terminal bch input1 terminal 200 60k v+ ? (4/9) 6 9 12 21 24 27 selouta tone-ba outa outb tone-bb seloutb ach selector output terminal ach bass(tone) filter terminal ach output terminal bch output terminal bch bass(tone) filter terminal bch selector output terminal 200 v+ ? (4/9) 7 26 vol1a vol1b ach volume input terminal bch volume input terminal 200 40k :vol= 0 ~ -7db 80k :vol= -8db ~ v+ ? (4/9) 8 10 23 25 tone-ha tone-dba tone-dbb tone-hb ach treble(tone) filter terminal ach bass(tone) filter terminal bch bass(tone) filter terminal bch treble(tone) filter terminal 200 v+ ? (4/9) 11 22 sra srb ach surround filter terminal bch surround filter terminal 200 v+ ? (4/9)
NJU7391 ? 10 ? ! terminal description no. symbol function equivalent circuit voltage 15 16 17 data clock latch 3-wired data terminal 3-wired clock terminal 3-wired latch terminal 4k 20 vref reference voltage terminal 160k 200k 200 v+ ? (4/9)
NJU7391 ? 11 ? ! ! ! ! application circuit 32 31 30 27 26 25 24 23 29 28 20 19 18 17 22 21 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 bias + + + + + + + + + + input(ach) input(bch) tre vol bass tre bass vol + + output(bch) output(ach) 3-wire eala + v+ digi v+ ana 1uf 1uf 6.8nf 47nf 220nf 5.6k 4.7nf 4.7uf 1uf 1uf 6.8nf 47nf 220nf 5.6k 4.7nf 4.7uf 4.7uf da ta clock latch + v+ gnd 100uf gnd ana gnd digi 100nf please connect the wiring for the de-coupling capacitor (especially c13) between v+ and gnd as short as possible to reduce the digital bus noise.
NJU7391 ? 12 ? supply current vs supply voltage ta=25 o c 0 5 10 15 0 5 10 15 supply voltage (v) supply current (ma) gain vs volume control v+=9v, vin(volin)=1vrms,f=1khz,rg=0 ? -100 -80 -60 -40 -20 0 -100 -80 -60 -40 -20 0 volume control (db) gain (db) gain vs frequency (volume) v+=9v, vol=0db to mute -10dbstep, vin=1vrms, ta=25 o c -120 -100 -80 -60 -40 -20 0 10 100 1000 10000 100000 frequency (hz) gain (db) supply current vs temparature v+=9v 5 10 15 -50 0 50 100 temparature ( o c) supply current (ma) mute level vs frequency (mute) v+=9v, vi n(vo l in)=1 vrm s , vo l =mute, r g=0 ? , ta=25 o c 0 20 40 60 80 100 120 10 100 1000 10000 100000 frequency (hz) mute level (db ) channel separation vs frequency v+=9v, vin=1vrms,vo=output, rg=0 ? , vol=0db, ta=25 o c 0 20 40 60 80 100 120 10 100 1000 10000 100000 frequency (hz) channel separation (db) mut e 85,25,-40 o c ain-bout, bin-aout ! ! ! ! typical characteristics
NJU7391 ? 13 ? crosstalk vs frequency v+=9v, vin(sel2-5)=1vrms,vin(sel1)=gnd, vo=output, rg=0 ? , vol=0db, ta=25 o c 0 20 40 60 80 100 120 10 100 1000 10000 100000 frequency (hz) cross talk (db) thd+n vs output voltage (volume sw eep) v+=9v, vin(ach), f=1khz, vo(ach)output, rg=0 ? , bw=20hz-20khz, ta=25 o c 0.0001 0.001 0.01 0.1 1 10 0.01 0.1 1 10 output voltage (vrms) thd + n (%) thd+n vs outputvoltage (frequency sw eep) v+=9v,vin(ach),vo(ach)output,rg=0 ? bw=20hz-80khz,ta=25 o c 0.0001 0.001 0.01 0.1 1 10 0.01 0.1 1 10 output voltage (vrms) thd + n (%) thd+n vs output voltage v+=9v, vin(ach), f=1khz, vo(ach)output, rg=0 ? , bw=20hz-20khz 0.0001 0.001 0.01 0.1 1 10 0.01 0.1 1 10 output voltage (vrms) thd + n (%) 0db -10db -20db -30db 100,1khz 20khz 85 o c -40 o c 25 o c output noise vs temparature v+=9v, vin=gnd, rg=0 ? , a-weight -120 -115 -110 -105 -100 -50 0 50 100 temparature ( o c) output noise (dbv) ! ! ! ! typical characteristics
NJU7391 ? 14 ? gain vs frequency (tone bass) v+=9v, vin=0.1vrms, bass gain=2db steps, ta=25 o c -20 -15 -10 -5 0 5 10 15 20 10 100 1000 10000 100000 frequency (hz) gain (db) gain vs frequency (eala) v+=9v, vin(ach)=0.1vrms, vout=bch, ta=25 o c -15 -10 -5 0 5 10 15 10 100 1000 10000 100000 frequency (hz) gain (db) gain vs frequency (tone) v+=9v, vin=0.1vrms, tone gain=+14db, -14db -20 -15 -10 -5 0 5 10 15 20 10 100 1000 10000 100000 frequency (hz) gain (db) gain vs frequency (eala) v+=9v, vin(ach)=0.1vrms, vout=ach, ta=25 o c -15 -10 -5 0 5 10 15 10 100 1000 10000 100000 frequency (hz) gain (db) gain vs frequency (eala) v+=9v, vin(ach)=0.1vrms,surround level=surround3 -15 -10 -5 0 5 10 15 10 100 1000 10000 100000 frequency (hz) gain (db) gain vs frequency (tone treb) v+=9v, vin=0.1vrms, treb gain=2db steps, ta=25 o c -20 -15 -10 -5 0 5 10 15 20 10 100 1000 10000 100000 frequency (hz) gain (db) -40 o c -40 o c 25 o c 85 o c 85 o c 25 o c surround3 surround1 surround2 surround1 surround2 surround3 85,25 o c 85,25 o c -40 o c ain-aout ain-bout ! ! ! ! typical characteristics
NJU7391 ? 15 ? [caution] the specifications on this databook are only given for information , without any guarantee as regards either mistakes or omissions. the application circuits in this databook are described only to show representative usages of the product and not intended for the guarantee or permission of any right including the industrial rights.

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