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njw1201 a ? 1 ? ver.1.0e 2ch electronic volume with dynamic bass boost general description package outline the NJW1201A is a 2-channel electronic volume with dynamic bass boost. 5+1diff-in 1-out selector. it includes 5+1diff input selector, 1st-volume, 2nd-volume, 3 band tone, sound mode, dynamic bass boost. the NJW1201A performs low noise and low distortion characteristics with resistance ladder circuit. all of functions are controlled by i 2 c bus interface. features operating voltage + 7.5 to + 10v i 2 c bus control low output noise -110dbvtyp. low thd 0.01%typ. 5+1diff input selector input gain 0 to + 30db/2dbstep 1st-volume 0 to -62db / 1dbstep, mute 2nd-volume 0 to -28db / 2dbstep, mute 3 band tone 0 to 14db/ 2dbstep (treble,middle), 0 to 17.5db/ 2.5dbstep (bass) sound mode 3 modes (eala, ealatreble, eala & ealatreble) sound gain 2-level gains dynamic bass boost 3-level gains bi-cmos technology package outline lqfp52-h2 block diagram NJW1201Afh2 + input(ach) + + + + + + + 4.7u 4.7u 4.7u 4.7u 4.7u 4.7u 4.7u 4.7u 4.7u 4.7u 4.7u 4.7u 4.7u 4.7u 4.7u 4.7u 4.7u 4.7u 4.7n 4.7n 22u 22n 47n 220n 4.7n 4.7n 22n 47n 220n 4.7n 1u 3k 4.7u input(bch) 4.7k 4.7k 4.7k 4.7k 5.6k 2.2k 220n 220n 75k 4.7u output(ach) output(bch) gnd v+ scl sda vref 1 2 3 4 5 6 7 8 9 10 11 12 13 40 41 42 43 44 45 46 47 48 49 50 51 52 26 25 24 23 22 21 20 19 18 17 16 15 14 39 38 37 36 35 34 33 32 31 30 29 28 27 sound mode & dynamicbassboost 0 to +30db 2db step tre mid bas i 2 c tre mid bas 1stvolume (0 to -62db,mute 1db step) 2ndvolume (0 to -28db,mute 2db step) 50k 50k 50k 50k 50k 50k 50k 50k 50k 50k 50k 50k 50k 25k 25k 0db 0db c1 c2 c3 c4 c5 r1 c6 c7 c8 r2 c9 c10 r3 c11 r4 r5 c12 c13 r6 c14 c15 r7 r8 c16 c17 c18 extsense terminal. pos sible to unconnect agc smoothing filter for dynamic bass boost filter terminal f or sound mode band passfilter terminal for dynamic bass boost input1 bch input2 bch input3 bch input1 ach input2 ach input3 ach input4 bc h input5 bc h input6 bc h input6 dif f input6 a c h input5 a c h input4 a c h c40 c39 c38 c37 c36 c35 c34 c33 c32 c31 c30 c29 c28 c27 c26 c25 c24 c23 r12 r11 c22 r9 c19 c20 r10 68n c21 filter terminal f or sound mode
NJW1201A ? 2 ? pin configuration lqfp52 no. symbol function no symbol function 1 nc not connected 27 srfil filter for sound mode 2 in3a ach input3 28 toneb2b bch bass(tone) filter 1 3 in2a ach input2 29 toneb1b bch bass(tone) filter 2 4 in1a ach input1 30 tonem2b bch middle(tone) filter 1 5 monouta ach monitor output 31 tonem1b bch middle(tone) filter 2 6 recouta ach rec output 32 tonehb bch treble(tone) filter 7 volina ach 1 st volume input 33 volinb bch 1 st volume input 8 toneha ach treble(tone) filter 34 recoutb bch rec output 9 tonem1a ach middle(tone) filter 1 35 monoutb bch monitor output 10 tonem2a ach middle(tone) filter 2 36 in1b bch input1 11 toneb1a ach bass(tone) filter 1 37 in2b bch input2 12 toneb2a ach bass(tone) filter 2 38 in3b bch input3 13 bpf1 filter 1 for dbb 39 nc not connected 14 bpf2 filter 2 for dbb 40 in4b bch input4 15 bpf3 filter 3 for dbb 41 nc not connected 16 vol2capa ach dc coupling for 2 nd volume 42 in5b bch input5 17 outa ach output 43 nc not connected 18 gnd ground 44 in6b bch input6 19 sda i2c data 45 vref reference voltage 20 scl i2c clock 46 in6diff negative input for input6 21 v+ supply voltage 47 in6a ach input6 22 outb bch output 48 nc not connected 23 vol2capb bch 2 nd volume dc coupling 49 nc not connected 24 extsense agc boost level for dbb 50 in5a ach input5 25 int agc smoothing filter for dbb 51 nc not connected 26 surtc filter for sound mode 52 in4a ach input4 1 2 3 4 5 6 7 8 9 10 11 12 13 40 41 42 43 44 45 46 47 48 49 50 51 52 26 25 24 23 22 21 20 19 18 17 16 15 14 39 38 37 36 35 34 33 32 31 30 29 28 27
NJW1201A ? 3 ? absolute maximum rating (ta=25 c) parameter symbol rating unit power supply voltage v + 10.5 v power dissipation p d 1200 (note1) mw maximum input voltage v imax 0 ~ v + (note2) v operating temperature range topr -20 ~ +75 c storage temperature range tstg -40 ~ + 125 c (note1) eia/jedec standard test board (76.2x114.3x1.6mm, 2layer, fr-4) mounting (note2) don?t put input voltage more than power supply voltage. electrical characteristics (ta=25 c,v + =9v, rg=0 ? , rl=47k ? , vin=1vrms, f=1khz,1stvol=0db, all controls flat unless otherwise specified) parameter symbol test condition min. typ. max. unit operating voltage v + 7.5 9.0 10.0 v supply current i dd no signal - 12 18 ma reference voltage v ref no signal 4.0 4.5 5.0 v volume input resistance r invol no signal - 26.5 - k ? maximum input voltage v im 1st volume=-20db thd=1% 2.0 2.4 - vrms maximum output voltage v om thd=1% 2.0 2.4 - vrms maximum input gain g vinmax input gain=+30db vin=50mvrms - 30 - db maximum gain g vmax -1 0 1 db mute level mute 1st volume = mute 2nd volume = mute - -100 -90 db channel balance g cb -1 0 1 db total harmonic distortion thd+n v o =0.5vrms, bw=400hz-30khz - 0.01 0.05 % output noise voltage 1 v no1 rg=0 ? , filter : a-weighted - -100 (10) -94 (20) dbv (uvrms) output noise voltage 2 v no2 1st volume = mute 2nd volume=mute rg=0 ? , filter : a-weighted - -110 (3) -100 (10) dbv (uvrms) cross talk ct selected input : rg=0 ? unselected input : signal - - -80 db channel separation cs rg=0 ? - - -80 db ? tone control (ta=25 c,v + =9v, rg=0 ? , rl=47k ? , vin=0.1vrms, f=1khz,all controls flat unless otherwise specified) parameter symbol test condition min. typ. max. unit high frequency boost hf bst treb=?1111?, f=10khz 11.5 14.0 16.5 db high frequency cut hf cut treb=?0111?, f=10khz -16.5 -14.0 -11.5 db mid frequency boost mf bst midd=?1111?, f=1khz 11.5 14.0 16.5 db mid frequency cut mf cut midd=?0111?, f=1khz -16.5 -14.0 -11.5 db low frequency boost lf bst bass=? 1111?, f=100hz 15.0 17.5 20.0 db low frequency cut lf cut bass=?0111?, f=100hz -20.0 -17.5 -15.0 db
NJW1201A ? 4 ? ? sound mode characteristics (ta=25 c,v + =9v, rg=0 ? , rl=47k ? , vin=0.1vrms, f=1khz,all controls flat unless otherwise specified) parameter symbol test condition min. typ. max. unit sound mode 1 g vm1 soundmode=?01? ain-aout, f=10khz - 4.0 - db sound mode 2 g vm2 soundmode=?10? ain-aout, - 4.0 - db sound mode 3 g vm3 soundmode=?11? ain-aout - 4.5 - db ? sound gain characteristics (ta=25 c,v + =9v, rg=0 ? , rl=47k ? , vin=0.1vrms, f=1khz,all controls flat unless otherwise specified) parameter symbol test condition min. typ. max. unit sound gain 1 g vs1 soundgain =?0? soundmode=?10? ain-aout, - 4.0 - db sound gain 2 g vs2 soundgain =?1? soundmode=?10? ain-aout, - 6.5 - db ? dynamic bass boost characteristics (ta=25 c,v + =9v, rg=0 ? , rl=47k ? , vin=0.05vrms, f=1khz,all controls flat unless otherwise specified) parameter symbol test condition min. typ. max. unit dbb gain 1 g vsdbb1 dbbgain=?01?, (a+b)in-aout - 7.5 - db dbb gain 2 g vsdbb2 dbbgain=?10?, (a+b)in-aout - 10.5 - db dbb gain 3 g vsdbb3 dbbgain=?11?, (a+b)in-aout - 14.0 - db
NJW1201A ? 5 ? ! timing on the i 2 c bus (sda,scl) ! characteristics of i/o stages for i2c bus (sda,scl) i 2 c bus load conditions standard mode : pull up resistance 4k ? (connected to +5v), load capacitance 200pf (connected to gnd) fast mode : pull up resistance 4k ? (connected to +5v), load capacitance 50pf (connected to gnd) standard mode fast mode parameter symbol min. typ. max. min. typ. max. unit low level input voltage v il 0.0 - 1.5 0.0 - 1.5 v high level input voltage v ih 2.7 - 5.0 2.7 - 5.0 v low level output voltage (3ma at sda pin) v ol 0 - 0.4 0 - 0.4 v input current each i/o pin with an input voltage between 0.1v dd and 0.9v ddmax i i -10 - 10 -10 - 10 a sda scl t f t hd:sta t low t r t hd:dat t high t f t su:dat s t su:sta t hd:sta t sp t su:sto sr t r t buf ps
NJW1201A ? 6 ? ! characteristics of bus lines (sda,scl) for i 2 c-bus devices standard mode fast mode parameter symbol min. typ. max. min. typ. max. unit scl clock frequency f scl - - 100 - - 400 khz hold time (repeated) start condition. t hd:sta 4.0 - - 0.6 - - s low period of the scl clock t low 4.7 - - 1.3 - - s high period of the scl clock t high 4.0 - - 0.6 - - s set-up time for a repeated start condition t su:sta 4.7 - - 0.6 - - s data hold time note) t hd:dat 0 - - 0 - - s data set-up time t su:dat 250 - - 100 - - ns rise time of both sda and scl signals t r - - 1000 - - 300 ns fall time of both sda and scl signals t f - - 300 - - 300 ns set-up time for stop condition t su:sto 4.0 - - 0.6 - - s bus free time between a stop and start condition t buf 4.7 - - 1.3 - - s capacitive load for each bus line c b - - 400 - - 400 pf noise margin at the low level v nl 0.5 - - 0.5 - - v noise margin at the high level v nh 1 - - 1 - - v c b ; total capacitance of one bus line in pf. note). data hold time : t hd:dat please hold the data hold time (t hd:dat ) to 300ns or more to avoid status of unstable at scl falling edge. the sda block in the NJW1201A does not hold data. add external data-delay-circuit of the sda terminal, in case of not providing a hold time of at least 300nsec for the sda in the master device. the time-consists of the data-delay-circuit of the sda terminal are as follows. (a) low level high level : t lh r p *c d (b) high level low level : t hl r d *c d in addition, schottky barrier diode (sbd) influences a low level at the acknowledge. therefore choose the low forward voltage (vf) as much as possible. ma ster scl sda v dd r p r p r d sbd c d NJW1201A
NJW1201A ? 7 ? definition of i 2 c register ? ? ? ? i 2 c bus format msb lsb msb lsb msb lsb s slave address a select address a data a p 1bit 8bit 1bit 8bit 1bit 8bit 1bit 1bit s: starting term a: acknowledge bit p: ending term ? ? ? ? slave address slave address hex msb lsb - 1 0 0 0 1 0 0 0 88(h) ? ? ? ? control register table the select address sets each function (input selector, input gain, 1 st -volume, tone control, 2 nd -volume, ealasurrond, dynamic bass boost, other settings). the auto increment function cycles the select address as follows. 00h 01h 02h 03h 04h 00h bit select address d7 d6 d5 d4 d3 d2 d1 d0 00h * input selector input gain (0 to 30db / 2dbstep) 01h * * 1st-vol (0 to -55db / 1dbstep, mute) 02h treb (0 to 14db/ 2dbstep) midd (0 to 14db/ 2dbstep) 03h bass (0 to 17.5db/ 2.5dbstep) 2nd-vol (0 to -28db / 2dbstep, mute) 04h * sound gain sound mode (3 modes) dbb gain (3 levels) dbb sense (3 levels) * : don?t care ? ? ? ? control register default value control register default value is all ?0?. bit select address d7 d6 d5 d4 d3 d2 d1 d0 00h 0 0 0 0 0 0 0 0 01h 0 0 0 0 0 0 0 0 02h 0 0 0 0 0 0 0 0 03h 0 0 0 0 0 0 0 0 04h 0 0 0 0 0 0 0 0
NJW1201A ? 8 ? ! instruction code a) input selector, input gain setting bit select address d7 d6 d5 d4 d3 d2 d1 d0 00h * input selector input gain ? input selector : input 1 to 5 (single ended), input 6 (single ended/differential), mute ? input gain : 0 to +30 db (2db/step) b) hi path filter switch, 1 st volume bit select address d7 d6 d5 d4 d3 d2 d1 d0 01h * * 1 st volume ? 1 st volume : 0 to -62 db (1db/step) , mute c) treble, middle bit select address d7 d6 d5 d4 d3 d2 d1 d0 02h treb midd ? treb : 0 to 14db/ 2dbstep ? midd : 0 to 14db/ 2dbstep d) bass, 2 nd volume bit select address d7 d6 d5 d4 d3 d2 d1 d0 03h bass 2 nd volume ? bass : 0 to 17.5db/ 2.5dbstep ? 2 nd volume : 0 to -28 db/ 2dbstep , mute e) sound enhancement, dynamic bass boost bit select address d7 d6 d5 d4 d3 d2 d1 d0 04h * sound gain sound mode dbb gain dbb sense ? sound gain : sound gain has 2 levels ? sound mode : sound mode has 3 types ? dbb gain : dynamic bass boost gain has 3 levels ? dbb sense : this means detect level of input signal.
NJW1201A ? 9 ? input selector (select address : 00h) 00h d6 d5 d4 input 1 0 0 0 input 2 0 0 1 input 3 0 1 0 input 4 0 1 1 input 5 1 0 0 input 6 (single ended) 1 0 1 input 6 (differential) 1 1 0 mute 1 1 1 *: default value input gain (select address : 00h) 00h gain(db) d3 d2 d1 d0 0* 0 0 0 0 +2 0 0 0 1 +4 0 0 1 0 +6 0 0 1 1 +8 0 1 0 0 +10 0 1 0 1 +12 0 1 1 0 +14 0 1 1 1 +16 1 0 0 0 +18 1 0 0 1 +20 1 0 1 0 +22 1 0 1 1 +24 1 1 0 0 +26 1 1 0 1 +28 1 1 1 0 +30 1 1 1 1 *: default value
NJW1201A ? 10 ? 1 st volume (select address : 01h) 01h gain (db) d5 d4 d3 d2 d1 d0 0 1 1 1 1 1 1 -1 1 1 1 1 1 0 -2 1 1 1 1 0 1 -3 1 1 1 1 0 0 -4 1 1 1 0 1 1 -5 1 1 1 0 1 0 -6 1 1 1 0 0 1 -7 1 1 1 0 0 0 -8 1 1 0 1 1 1 -16 1 0 1 1 1 1 -32 0 1 1 1 1 1 -48 0 0 1 1 1 1 -56 0 0 0 1 1 1 -57 0 0 0 1 1 0 -58 0 0 0 1 0 1 -59 0 0 0 1 0 0 -60 0 0 0 0 1 1 -61 0 0 0 0 1 0 -62 0 0 0 0 0 1 mute 0 0 0 0 0 0 *: default value
NJW1201A ? 11 ? treble (select address : 02h) 02h gain(db) d7 d6 d5 d4 +14 1 1 1 1 +12 1 1 1 0 +10 1 1 0 1 +8 1 1 0 0 +6 1 0 1 1 +4 1 0 1 0 +2 1 0 0 1 0 1 0 0 0 0* 0 0 0 0 -2 0 0 0 1 -4 0 0 1 0 -6 0 0 1 1 -8 0 1 0 0 -10 0 1 0 1 -12 0 1 1 0 -14 0 1 1 1 *: default value middle (select address : 02h) 02h gain(db) d3 d2 d1 d0 +14 1 1 1 1 +12 1 1 1 0 +10 1 1 0 1 +8 1 1 0 0 +6 1 0 1 1 +4 1 0 1 0 +2 1 0 0 1 0 1 0 0 0 0* 0 0 0 0 -2 0 0 0 1 -4 0 0 1 0 -6 0 0 1 1 -8 0 1 0 0 -10 0 1 0 1 -12 0 1 1 0 -14 0 1 1 1 *: default value
NJW1201A ? 12 ? bass (select address : 03h) 03h gain(db) d7 d6 d5 d4 +17.5 1 1 1 1 +15 1 1 1 0 +12.5 1 1 0 1 +10 1 1 0 0 +7.5 1 0 1 1 +5 1 0 1 0 +2.5 1 0 0 1 0 1 0 0 0 0* 0 0 0 0 -2.5 0 0 0 1 -5 0 0 1 0 -7.5 0 0 1 1 -10 0 1 0 0 -12.5 0 1 0 1 -15 0 1 1 0 -17.5 0 1 1 1 *: default value 2 nd volume (select address : 03h) 03h gain(db) d3 d2 d1 d0 0* 1 1 1 1 -2 1 1 1 0 -4 1 1 0 1 -6 1 1 0 0 -8 1 0 1 1 -10 1 0 1 0 -12 1 0 0 1 -14 1 0 0 0 -16 0 1 1 1 -18 0 1 1 0 -20 0 1 0 1 -22 0 1 0 0 -24 0 0 1 1 -26 0 0 1 0 -28 0 0 0 1 mute 0 0 0 0 *: default value
NJW1201A ? 13 ? sound gain (select address : 04h) 04h sound gain d6 gain lo* 0 gain hi 1 *: default value sound enhancement mode (select address : 04h) 04h sound mode d5 d4 off* 0 0 ealatreble 0 1 eala 1 0 eala & ealatreble 1 1 *: default value dynamic bass boost gain (select address : 04h) 04h dbb gain d3 d2 off* 0 0 gain 1 0 1 gain 2 1 0 gain 3 1 1 *: default value dynamic bass boost sense (select address : 04h) 04h dbb sense d1 d0 sense 1* 0 0 sense 2 0 1 sense 3 1 0 sense 4 1 1 *: default value
NJW1201A ? 14 ? ! terminal description no. symbol function equivalent circuit voltage 2 3 4 36 37 38 40 42 44 47 50 52 in3a in2a in1a in1b in2b in3b in4b in5b in6b in6a in5a in4a ach input3 ach input2 ach input1 bch input1 bch input2 bch input3 bch input4 bch input5 bch input6 ach input6 ach input5 ach input4 v+ / 2 5 6 13 15 17 22 34 35 monouta recouta bpf1 bpf3 outa outb recoutb monoutb ach monitor output ach rec output filter 1 for dbb filter 3 for dbb ach output bch output bch rec output bch monitor output v+ / 2 7 33 volina volinb ach 1 st volume input bch 1 st volume input v+ / 2 8 10 12 28 30 32 toneha tonem2a toneb2a toneb2b tonem2b tonehb ach treble(tone) filter ach middle(tone) filter 2 ach bass(tone) filter 2 bch bass(tone) filter 2 bch middle(tone) filter 2 bch treble(tone) filter v+ / 2 18.5k 31.5k 50 fb 9.3k 15.7k 4k (pin.8,32) 5.4k (pin.10.30) 1.7k (pin.12.28)
NJW1201A ? 15 ? ! terminal description no. symbol function equivalent circuit voltage 9 11 29 31 tonem1a toneb1a toneb1b tonem1b ach middle(tone) filter 1 ach bass(tone) filter 1 bch bass(tone) filter 1 bch middle(tone) filter 1 v+ / 2 14 bpf2 filter 2 for dbb v+ / 2 16 23 vol2capa vol2capb ach dc coupling for 2 nd volume bch dc coupling for 2 nd volume v+ / 2 18 gnd ground - 0 5.4k 50
NJW1201A ? 16 ? ! terminal description no. symbol function equivalent circuit voltage 19 20 sda scl i2c data i2c clock - 21 v+ supply voltage - v+ 24 extsense agc boost level for dbb v+ / 2 25 int agc smoothing filter for dbb - 8k vreg 5v 4k v+ 9v scl:gnd sda:ack 36k 50 50 2 k 0.5u
NJW1201A ? 17 ? ! terminal description no. symbol function equivalent circuit voltage 26 surtc filter for sound mode v+ / 2 27 srfil filter for sound mode v+ / 2 45 vref reference voltage v+ / 2 46 in6diff negative input for input6 v+ / 2 16k fb 16k 212k 212k 63k 37k 16k fb 10k
NJW1201A ? 18 ? test circuit input(ach) + 4.7u 4.7u 4.7u 4.7u 4.7u 4.7u 4.7u 4.7u 4.7u 4.7u 4.7u 4.7u 4.7u 4.7u 4.7u 4.7u 4.7u 4.7u 4.7n 4.7n 22u 22n 47n 220n 4.7n 4.7n 22n 47n 220n 4.7n 1u input(bch) 4.7k 4.7k 4.7k 4.7k 10k 15n 47k 2.2u output(ach) output(bch) gnd v+ scl sda vref 1 2 3 4 5 6 7 8 9 10 11 12 13 40 41 42 43 44 45 46 47 48 49 50 51 52 26 25 24 23 22 21 20 19 18 17 16 15 14 39 38 37 36 35 34 33 32 31 30 29 28 27 sound mode & dynamicbassboost 0 to +30db 2db step tre mid bas i 2 c tre mid bas 1stvolume (0 to -62db,mute 1db step) 2ndvolume (0 to -28db,mute 2db step) 50k 50k 50k 50k 50k 50k 50k 50k 50k 50k 50k 50k 50k 25k 25k 0db 0db c1 c2 c3 c6 c7 c8 r2 c9 c10 r3 c11 r4 c13 r6 c14 c15 r7 r8 c16 c17 c18 a gc smoothing filter for dynamic bass boost filter terminal for sound mode low passfilter terminal for dynamic bass boost input1 bch input2 bch input3 bch input1 ach input2 ach input3 ach input4 bc h input5 bc h input6 bc h input6 dif f input6 a c h input5 a c h input4 a c h c40 c39 c38 c37 c36 c35 c34 c33 c32 c31 c30 c27 c26 c25 c24 c23 r12 r11 c22 c20 recout ach monout ach c4 4.7u volin ach c29 recout ach monout ach volin ach bpf1 extsense terminal. 68n c21 filter terminal for sound mode
NJW1201A ? 19 ? application circuit + input(ach) + + + + + + + 4.7u 4.7u 4.7u 4.7u 4.7u 4.7u 4.7u 4.7u 4.7u 4.7u 4.7u 4.7u 4.7u 4.7u 4.7u 4.7u 4.7u 4.7u 4.7n 4.7n 22u 22n 47n 220n 4.7n 4.7n 22n 47n 220n 4.7n 1u 3k 4.7u input(bch) 4.7k 4.7k 4.7k 4.7k 5.6k 2.2k 220n 220n 75k 4.7u output(ach) output(bch) gnd v+ scl sda vref 1 2 3 4 5 6 7 8 9 10 11 12 13 40 41 42 43 44 45 46 47 48 49 50 51 52 26 25 24 23 22 21 20 19 18 17 16 15 14 39 38 37 36 35 34 33 32 31 30 29 28 27 sound mode & dynamicbassboost 0 to +30db 2db step tre mid bas i 2 c tre mid bas 1stvolume (0 to -62db,mute 1db step) 2ndvolume (0 to -28db,mute 2db step) 50k 50k 50k 50k 50k 50k 50k 50k 50k 50k 50k 50k 50k 25k 25k 0db 0db c1 c2 c3 c4 c5 r1 c6 c7 c8 r2 c9 c10 r3 c11 r4 r5 c12 c13 r6 c14 c15 r7 r8 c16 c17 c18 extsense terminal. possible to unconnect agc smoothing filter f or dynamic bass boost filter terminal for sound mode band passfilter terminal for dynamic bass boos t input1 bch input2 bch input3 bch input1 ach input2 ach input3 ach input4 bc h input5 bc h input6 bc h input6 dif f input6 a c h input5 a c h input4 a c h c40 c39 c38 c37 c36 c35 c34 c33 c32 c31 c30 c29 c28 c27 c26 c25 c24 c23 r12 r11 c22 r9 c19 c20 r10 68n c21 filter terminal f or sound mode
NJW1201A ? 20 ? application note [1] input selector (1-1) single ended stereo inputs all single ended inputs (pin.2,3,4,36,37,38,40,42,44,47,50,52) have an input impedance of 50 k ? . (1-2) differential input in6a(pin.47)/in6b(pin.44) can use as single-ended input or differential input. in case of differential input, in6a/in6b are positive input have an input impedance of 50k ? . and in6diff(pin.46) is negative input terminal has an input impedance of 50k ? . to improve cmrr at input, please connect the same value of coupling capacitor to in6a/in6b/in6diff. [2] monitor out(pin.5,35), rec out(pin6,34), volin(pin.7,33) hi-path filter (sallen-key) can be made up with these terminals. 2 1 2 1 0 2 1 c c r r f = 2 1 2 1 2 2 1 2 1 c c r r r c c c c q + = c1 c2 r1 monitorout(pin:5,35) volin(pin:7,33) r2=26.5k rec out( pin:6,34)
NJW1201A ? 21 ? application note [3] tone control (a)bass (a-1)boost (a-2)cut (hz) (db) table.a-1 : internal resistance in each gain. gain r1 r2 17.5db 48.3k ? 1.7k ? 15db 45.8k ? 4.2k ? 12.5db 42.5k ? 7.5k ? 10db 38.1k ? 11.9k ? 7.5db 32.2k ? 17.8k ? 5db 24.4k ? 25.6k ? 2.5db 13.9k ? 36.1k ? 0db 0 ? 50k ? 2 1 3 ) 2 1 ( 2 1 0 c c r r r f ? ? ? + = () () 2 1 3 2 2 1 3 2 3 2 1 20 0 c c r c r c r c r r r log g + ? + ? ? + ? + + = () 2 1 3 2 2 2 1 3 ) 2 1 ( c c r c r c c r r r q + ? + ? ? ? ? + = tone-b2(pin:12,28) tone-b1(pin:11,29) in out r2 r1 c2 c1 r3 out r1 r2 in c1 c2 r3 tone-b1(pin:11,29) tone-b2(pin:12,28)
NJW1201A ? 22 ? (b)middle (b-1)boost (b-2)cut (hz) (db) table.a-1 : internal resistance in each gain. gain r1 r2 14db 44.6k ? 5.4k ? 12db 41.7k ? 8.3k ? 10db 38.1k ? 11.9k ? 8db 33.6k ? 16.4k ? 6db 27.8k ? 22.2k ? 4db 20.6k ? 29.4k ? 2db 11.5k ? 38.5k ? 0db 0 ? 50k ? 2 1 3 ) 2 1 ( 2 1 0 c c r r r f ? ? ? + = () () 2 1 3 2 2 1 3 2 3 2 1 20 0 c c r c r c r c r r r log g + ? + ? ? + ? + + = () 2 1 3 2 2 2 1 3 ) 2 1 ( c c r c r c c r r r q + ? + ? ? ? ? + = tone-m2(pin:10,30) tone-m1(pin:9,31) in out r2 r1 c2 c1 r3 out r1 r2 in c1 c2 r3 tone- m1( pin:10,30) tone- m2( pin:9,31)
NJW1201A ? 23 ? (c)treble (c-1)boost (c-2)cut (db) table.a-1 : internal resistance in each gain. gain r1 r2 14db 22k ? 4k ? 12db 20.2k ? 5.8k ? 10db 18.4k ? 7.6k ? 8db 16.1k ? 9.9k ? 6db 13.3k ? 12.7k ? 4db 9.8k ? 16.2k ? 2db 5.5k ? 20.5k ? 0db 0 ? 26k ? () () ? ? ? ? ? ? ? ? + + = 2 2 1 2 / 1 1 1 2 1 1 20 r c f r r log g v tone-h(pin:8,32) c1 in out r2 r1 in out tone-h(pin:8,32) r1 r2 c1
NJW1201A ? 24 ? application note [4] sound mode there are 3 sound modes in njw120a. 1) ealarebirth :this is a sound effect, this is suitable for compressed audio. 2) eala :this is a comfortable surround that makes much of sound location. 3) ealarebirth & eala :this is a sound effect that be suitable for various music. these sound modes have 2-level gain effects. sound modes and 2-level gain are switched by i2c command. and, frequency effects of sound mode depends on c21,c22. please choose your suitable value of c21,c22 for audio set. recommendation is c21=68nf, c22=4.7nf. frequency response of sound mode is shown in next page. regarding pop noise reduction when sound mode and sound gain switched NJW1201A doesn?t cover about this. *notice: about njw1201 regarding pop noise reduction when sound mode and sound gain switched, *sound mode swtiched: pop noise reduction is cared by capacitor pin.26 *sound gain switched: pop noise reduction is not cared srfil (pin.27) c22 sound-output ach sound-output bch sound-intput ach sound-intput bch sound filter a *hi *lo *ealarebirth *eala * ea l a r eb ir t h & ea l a filter terminal for sound mode surtc (pin.26) filter terminal for sound mode c21
NJW1201A ? 25 ? gain vs frequency (ealarebirth) v+=9v, vin(ach)=0.1vrms, vo(ach), ta=25 o c -5 0 5 10 10 100 1000 10000 100000 frequency (hz) gain (db) gain vs frequency (eala) v+=9v, vin(ach)=0.1vrms, vo(ach), ta=25 o c -5 0 5 10 10 100 1000 10000 100000 frequency (hz) gain (db) gain vs frequency (eala+ealarebirth) v+=9v, vin(ach)=0.1vrms, vo(ach), ta=25 o c -5 0 5 10 10 100 1000 10000 100000 frequency (hz) gain (db) gain vs frequency (ealarebirth) v+=9v, vin(ach)=0.1vrms, vo(ach), ta=25 o c -5 0 5 10 10 100 1000 10000 100000 frequency (hz) gain (db) gain vs frequency (eala+ealarebirth) v+=9v, vin(ach)=0.1vrms, vo(ach), ta=25 o c -5 0 5 10 10 100 1000 10000 100000 frequency (hz) gain (db) gain vs frequency (eala) v+=9v, vin(ach)=0.1vrms, vo(ach), ta=25 o c -5 0 5 10 10 100 1000 10000 100000 frequency (hz) gain (db) 150nf 100nf 47nf 68nf c21:sweep , c22=4.7nf 150nf 100nf 47nf 68nf c21:sweep , c22=4.7nf 47n,68n,100n,150nf c21:sweep , c22=4.7nf 10nf 6.8nf 3.3nf 4.7nf c21:68nf , c22=sweep 10nf 6.8nf 3.3nf 4.7nf c21:68nf , c22=sweep 10nf 6.8nf 3.3nf 4.7nf c21:68nf , c22=sweep
NJW1201A ? 26 ? application note [5] dynamic bass boost (dbb) 5-1. block diagram of dbb dynamic bass boost (dbb) is a system that changes boost gain by changing of input level. the boost gain has 3-levels, this is controlled by i2c. agc circuit changes the boost gain by detecting the input signal. 5-2.setting of ext filter the frequency response of dbb can be changed in ext filter. ext filter is composed of bpf1(pin.13), bpf2(pin.14), bpf3(pin.15). below are examples of filter structure. a) bpf ? ? ? ? ? ? ? ? = 2 3 2 log 20 r r g v () 3 2 1 // 2 1 r r r c f c = 2 1 3 // 2 1 r r r q = ext filter (inverting type) 13 14 15 r1 r2 c c r3 dc cut bpf3:output bpf1 bpf2 bpf1(pin.13) a sound-output ach sound-output bch sound-intput ach sound-intput bch 3-levels a=1, 0.6, 0.33 a gc int(pin.25) bpf2(pin.14) bpf3(pin.15) ext filter (inverting type) nor mally gain=1
NJW1201A ? 27 ? b) lpf (-6db/oct) ? ? ? ? ? ? ? ? = 1 2 log 20 r r g v 2 2 1 cr f c = c) lpf (-12db/oct) ? ? ? ? ? ? ? ? = 1 3 log 20 r r g v 3 2 2 1 2 1 r r c c f c = 5-3. dbb int external capacitor connected to pin.25 decides attack/recovery time of dbb. recovery time (s) = 0.5 x c(uf) (test condition : vin(ach+bch)=2vrms, sense level = 4 ) ext filter (inverting type) 13 14 15 r1 c r2 bpf3:output bpf1 bpf2 ext filter (inverting type) 13 14 15 c1 r1 c2 bpf3:output bpf1 bpf2 r2 r3 recovery time (c=4.7uf) vin=2 0.2vrms f=70hz
NJW1201A ? 28 ? 5-4. detective level in dbb detective level of input signal in dbb is control by i2c or external resistor (rsense:pin.24). in case of without external resistor, detective level is shown in below fig5-4-1, 5-4-2. fig5-4-1 is output voltage vs input voltage when detective level is changed (gain setting = 3). fig5-4-2 is output voltage vs input voltage when gain setting is changed (sense level = 4). ? these figures don?t include the external resistor (rsense:pin.24). regarding detective level (sense level), internal resistance is switched by i2c. this resistance decides detective level. 1. sense 1 = 36k ? 2. sense 2 = 9k ? 3. sense 3 = 5.2k ? 4. sense 4 = 3.6k ? and, if connect the external resistor (rsense:pin.24), detected level is shown in below equations. 1. sense 1 = 36k ? // rsense 2. sense 2 = 9k ? // rsense 3. sense 3 = 5.2k ? // rsense 4. sense 4 = 3.6k ? // rsense output vs input voltage (dbb senselevel sw eep) v+=9 v, dbb=gain3 , vin (a+bch), f=7 0h z vou t=ach , ta =2 5 o c 0.001 0.01 0.1 1 10 0.001 0.01 0.1 1 10 input voltage (vrms) output voltage (vrms) sense4 sense3 sense2 sense1 output vs input voltage (dbb gainlevel sw eep) v+=9v, sense=sense4, vin(a+bch), f=70hz vo u t=ac h , ta = 2 5 o c 0.001 0.01 0.1 1 10 0.001 0.01 0.1 1 10 input voltage (vrms) output voltage (vrms) gain3 gain2 gain1
NJW1201A ? 29 ? application note [6] 2 nd volume 2 nd volume range is 0db to ?28db with ?2db steps. frequency response of 2 nd volume depends on capacitor connected to vol2cap(pin.16,23). it shows frequency response of 2 nd volume in fing.6-1(2 nd volume=-28db), fig6-2(2 nd volume=mute). to flat the frequency response, please choose bigger capacitor. fig.6-1 fig.6-2 but, when power turns on, it takes some charge time to vol2cap(pin.16.23) if 2 nd volume is switched on charge, pop noise occurs. the cause of pop noise is gap of voltage between vref and vol2cap. to be fast the charge time, connect smaller capacitor to vol2cap. fig.6-3.vol2cap=1uf fig.6-4.vol2cap=4.7uf fig.6-4.vol2cap=10uf gain vs frequency (2nd volume) v+=9v, 2ndvol=-28db, vin=1vrms, ta=25 o c -60 -50 -40 -30 -20 -10 0 10 100 1000 10000 100000 frequency (hz) gain (db) 2ndvol=mute c=1uf 2ndvol=mute c=10uf 2ndvol=mute c=4.7uf gain vs frequency (2nd volume) v+=9v, 2ndvol=mute, vin=1vrms, ta=25 o c -120 -100 -80 -60 -40 -20 0 10 100 1000 10000 100000 frequency (hz) gain (db) 2ndvol=mute c=10uf 2ndvol=mute c=1u f 2ndvol=mute c=4.7 uf 1st&2ndvol=mute dc voltage vs time (2nd volume) v +=0 ---> 9v, ta=25 o c 0 1 2 3 4 5 6 7 8 -0.5 0 0.5 1 1.5 2 time (s) dc voltage (v) vol2cap=1uf vdc at vol2cap vref dc voltage vs time (2nd volume) v+=0 ---> 9v, ta=25oc 0 1 2 3 4 5 6 7 8 -0.5 0 0.5 1 1.5 2 time (s) dc voltage (v) vol2cap=4.7uf vref vdc at vol2cap dc voltage vs time (2nd volume) v+=0 ---> 9v, ta=25oc 0 1 2 3 4 5 6 7 8 -0.5 0 0.5 1 1.5 2 time (s) dc voltage (v) vol2cap=10uf vdc at vol2cap vref
NJW1201A ? 30 ? [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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