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NJW1240 ? 1 ? ver. 1.1e 5vrms ground referenced 6-channel line amplifier ? ? ? ? general description the NJW1240 is a 6-channel audio line amplifier for high voltage pre-out of car av system. it can swing 5vrms(14.1v peak-to peak) singal at 8v opearating voltage because of including the charge pump circuit. ground-referenced outputs eliminate output coupling capacitor. the pop noise suppression circuit reduces a pop noise at the power-on and power-off. ? ? ? ? features operating voltage +6 to +10v operating current i dd =15ma typ. at v + =8v, r l =47k ? , no signal maximum output voltage 5.0vrms min. low distortion 0.0008% typ low output noise -102db typ. output coupling capacitor-less external synchronizing divide-by-2 pop noise suppression circuit external mute gain select +6db/+8.3db rf immunity opamp tolerant to fr noise. (ex. mobile phone) bi-cmos technology package outline ssop32 ? ? ? ? block diagram package outline NJW1240v in1 in2 in3 in4 in6 in5 out1 out2 out3 out4 out6 out5 char ge pu mp v - gain select v + detector pop noise suppression v + v - mute tr v + v - mute tr v + v - mute tr v + v - mute tr v + v - mute tr v + v - mute tr
NJW1240 ? 2 ? ? ? ? ? pin configuration no. symbol function no. symbol function 1 in1 input 1 17 nc no connect 2 in2 input 2 18 fb v- power supply external setting 3 in3 input 3 19 cp flying capacitor positive terminal 4 in4 input 4 20 nc no connect 5 in5 input 5 21 nc no connect 6 in6 input 6 22 gnd ground 7 mute mute / pop noise suppression 23 cn flying capacitor negative terminal 8 gain gain select 24 mute_tc pop noise suppression capacitor 9 v - in v- power input 25 v + a v+ power supply for analog 10 v - out v- power output 26 gnd ground 11 regcnt v- power control 27 out6 output 6 12 nc no connect 28 out5 output 5 13 nc no connect 29 out4 output 4 14 clk external clock input 30 out3 output 3 15 v + reg v+ power supply for regulator 31 out2 output 2 16 nc no connect 32 out1 output 1 NJW1240
NJW1240 ? 3 ? ? ? ? ? absolute maximum rating (ta=25 c) parameter symbol rating unit supply voltage v + 10.5 v clk terminal voltage v clk -0.3 +6 v v - power supply control voltage v regcnt -0.3 +6 v fb terminal voltager v fb (v - out)+6 v maximum input voltage v in v + +0.3 v power dissipation p d 905 (note1) mw operating temperature range topr -40 ~ +85 c storage temperature range tstg -40 ~ + 125 c (note1) eia/jedec standard test board (76.2x114.3x1.6mm, 2layer, fr-4) mounting recommended operating conditions (ta=25 c unless otherwise specified) parameter symbol test condition min. typ. max. unit operating voltage v + 6 8 10 v external clock input range ?6;,e f clk 150 - 1250 khz external clock duty input range duty 45 - 80 % (note2) the regulator for v- power supply operates by the half of f clk . ? electrical characteristics (ta=25 c, v + =8v, f=1khz, vin=0dbv, r l =47k ? , gain=low, mute=high, regcnt=high unless otherwise specified) parameter symbol test condition min. typ. max. unit operating current i dd no signal - 12 20 ma voltage gain1 g v1 5.5 6.0 6.5 db voltage gain2 g v2 gain=high 7.8 8.3 8.8 db maximum output voltage v omax thd=1% 5 - - vrms mute level v mute mute=low - -100 -80 db output noise voltage v no rg=0 ? , a=weighted - -102 (7.94) - dbv ( v) total harmonic distortion thd bw:400hz-22khz - 0.0008 - % channel separation cs rg=600 ? 80 - - db internal oscillating frequency f osc f clk =no signal - 300 - kxhz output offset voltage v os rg=0 ? - - 8 mv ? control characteristics (ta=25 c, v + =8v, f=1khz, vin=0dbv, r l =47k ? unless otherwise specified) parameter symbol test condition min. typ. max. unit mute terminal high mute h mute off 2.3 - v + v mute terminal low mute l mute on 0 - 0.7 v gain terminal high gain h gv=8.3db 2.3 - v + v gain terminal low gain l gv=6db 0 - 0.7 v clk terminal high clk h 2.3 - 5.5 v clk terminal low clk l 0 - 0.7 v
NJW1240 ? 4 ? ? terminal description terminal symbol function equivalent circuit voltage 1 2 3 4 5 6 in1 in2 in3 in4 in5 in6 input1 input2 input3 input4 input5 input6 0v 7 8 mute gain mute/pop noise suppression gain select 0v 11 regcnt v- power control 0v 14 clk external clock input 0v 18 fb v- power supply external setting - 1pf 50k ? 10k ? v + a v + a v + a v - in v - in 100k ? 1pf 20k ? v + av + a v - in reg(5v) 500k ? 500k ? 100 ? reg(5v) 1m ? 100 ? reg(5v) 2pf 100 ? 1k ? reg(5v) v - out
NJW1240 ? 5 ? ? terminal description terminal symbol function equivalent circuit voltage 19 cp flying capacitor positive terminal - 23 cn flying capacitor negative terminal - 24 mute_tc pop noise suppression capacitor 0v 27 28 29 30 31 32 out6 out5 out4 out3 out2 out1 output6 output5 output4 output3 output2 output1 0v v + reg v - out v - out v - out 100k ? 1m ? 50k ? v + a v - in v + av + a v - in v - in 50 ? 200 ? 200 ? fb v + a v + a v + a v - in v - in v - in
NJW1240 ? 6 ? ? ? ? ? test circuit (i dd ) ? ? ? ? test circuit (gv, v omax , thd, v mute ) c1=1uf c8=1uf c10=1uf v + rl=47k ? rl=47k ? rl=47k ? rl=47k ? rl=47k ? rl=47k ? c2=1uf c3=1uf c4=1uf c5=1uf c6=1uf v + v + r2=680k ? c11=1uf v + reg re gcnt mute 32 in1 out1 mute 1 31 2 mute 30 in3 out3 mute 3 29 4 mute 28 in5 out5 mute 5 27 6 negative voltage regulator pop noise s u pp re ssi o n bias in2 in4 in6 out2 out4 out6 7 8 9 10 11 12 13 14 15 16 26 25 24 23 22 21 20 19 18 17 mute gnd mute _tc v + a gain v - out cn gnd cp fb nc clk nc nc nc gain select 6db/8db nc nc 50k ? 50k ? 50k ? 50k ? 50k ? 50k ? 100k ? 100k ? v - in v - out a v + c12=10nf c9=10nf v + c19=10uf + c1=1uf c8=1uf c10=1uf v + rl=47k ? rl=47k ? rl=47k ? rl=47k ? rl=47k ? rl=47k ? c2=1uf c3=1uf c4=1uf c5=1uf c6=1uf v + v + r2=680k ? c11=1uf v + reg regcnt mute 32 in1 out1 mute 1 31 2 mute 30 in3 out3 mute 3 29 4 mute 28 in5 out5 mute 5 27 6 negative voltage regulator pop noise suppression bias in2 in4 in6 out2 out4 out6 7 8 9 10 11 12 13 14 15 16 26 25 24 23 22 21 20 19 18 17 mute gnd mute _tc v + a gain v - out cn gnd cp fb nc clk nc nc nc gain select 6db/8db nc nc 50k ? 50k ? 50k ? 50k ? 50k ? 50k ? 100k ? 100k ? v - in v - out v c12=10nf c9=10nf v + c19=10uf +
NJW1240 ? 7 ? ? ? ? ? test circuit (v no ) ? ? ? ? test circuit (cs) c10=1uf v + rl=47k ? rl=47k ? rl=47k ? rl=47k ? rl=47k ? rl=47k ? v + v + c11=1uf v + reg re gcnt mute 32 in1 out1 mute 1 31 2 mute 30 in3 out3 mute 3 29 4 mute 28 in5 out5 mute 5 27 6 negative voltage regulator pop noise s u pp re ssi o n bias in2 in4 in6 out2 out4 out6 7 8 9 10 11 12 13 14 15 16 26 25 24 23 22 21 20 19 18 17 mute gnd mute _tc v + a gain v - out cn gnd cp fb nc clk nc nc nc gain select 6db/8db nc nc 50k ? 50k ? 50k ? 50k ? 50k ? 50k ? 100k ? 100k ? v - in v - out v c1=1uf c8=1uf c2=1uf c3=1uf c4=1uf c5=1uf c6=1uf r2=680k ? c9=10nf c12=10nf v + c19=10uf + c10=1uf v + rl=47k ? rl=47k ? rl=47k ? rl=47k ? rl=47k ? rl=47k ? v + v + c11=1uf v + reg regcnt mute 32 in1 out1 mute 1 31 2 mute 30 in3 out3 mute 3 29 4 mute 28 in5 out5 mute 5 27 6 negative voltage regulator pop noise suppression bias in2 in4 in6 out2 out4 out6 7 8 9 10 11 12 13 14 15 16 26 25 24 23 22 21 20 19 18 17 mute gnd mute _tc v + a gain v - out cn gnd cp fb nc clk nc nc nc gain select 6db/8db nc nc 50k ? 50k ? 50k ? 50k ? 50k ? 50k ? 100k ? 100k ? v - in v - out v rg=600 ? rg=600 ? rg=600 ? rg=600 ? rg=600 ? rg=600 ? c1=1uf c8=1uf c2=1uf c3=1uf c4=1uf c5=1uf c6=1uf r2=680k ? c9=10nf c12=10nf v + c19=10uf +
NJW1240 ? 8 ? ? ? ? ? application circuit c1=1uf c8=1uf c10=1uf c7=1uf v + rl=47k ? rl=47k ? rl=47k ? rl=47k ? rl=47k ? rl=47k ? r1=10 ? c2=1uf c3=1uf c4=1uf c5=1uf c6=1uf 3v~v + v + r2=680k ? c11=1uf r3=1k ? v + reg regcnt mute 32 in1 out1 mute 1 31 2 mute 30 in3 out3 mute 3 29 4 mute 28 in5 out5 mute 5 27 6 negative voltage regulator pop noise suppression bias in2 in4 in6 out2 out4 out6 7 8 9 10 11 12 13 14 15 16 26 25 24 23 22 21 20 19 18 17 mute gnd mute _tc v + a gain v - out cn gnd cp fb nc clk nc nc nc gain select 6db/8db nc nc 50k ? 50k ? 50k ? 50k ? 50k ? 50k ? 100k ? 100k ? v - in *connect to v - out[10pin] c9=1uf c12=1uf v + c19=100uf +
NJW1240 ? 9 ? ? ? ? ? typical characteristics supply current vs temperature v+=8v , rl=noload , mute=h , gain=l 0 5 10 15 20 -50 -25 0 25 50 75 100 125 temperature[ o c] supply current[ma] supply current vs supply voltage rl=noload , mute=h , gain=l 0 5 10 15 20 0123456 7891011 supply voltage[v ] supply current[ma] ta=85 o c ta=- 40 o c ta=25 o c voltagegain vs frequency v+=8v , vin=0dbv , rl=47k ? , mute=h 0 5 10 15 10 100 1000 10000 100000 frequency[hz] voltagegain[db] gain=h ta=-40,25,85 o c ga in=l ta=-40,25,85 o c mutelevel vs frequency v +=8v, rl=47k ? , mute=l , gain=l filter=bandpass -120 -100 -80 -60 -40 -20 0 10 100 1000 10000 100000 freauency[hz] mutelevel[db] ta=- 40 o c ta=85 o c ta=25 o c outputnoisel vs temperature v+=8v, rg=0 ? , rl=47k ? , mute=h , gain=l filter=a-w eighted -120 -100 -80 -60 -40 -20 0 -50 -25 0 25 50 75 100 temperature[ o c] outputnoise[dbv] output dc offset vs temperature v+=8v , vin=nosignal , rl=47k ? mute=h , gain=l -5 -4 -3 -2 -1 0 1 2 3 4 5 -50 -25 0 25 50 75 100 125 temperature[ o c] output dc offset[mv] ch6 ch2 ch1 ch3 ch4 ch5
NJW1240 ? 10 ? ? ? ? ? typical characteristics thd+n vs frequency v+=8v , vin=0dbv , rl=47k ? , mute=h , gain=l ta=25 o c , filter=22hz to 80khz 0.0001 0.001 0.01 0.1 1 10 10 100 1000 10000 100000 frequency[hz] thd+n[% ] thd+n vs output voltage v+=8v , f=1khz , rl=47k ? , mute=h , gain=l filter=400hz to 22khz 0.0001 0.001 0.01 0.1 1 10 0.01 0.1 1 10 output voltage[vrms] thd+n[% ] ta=-40 o c ta=25,85 o c psrr vs frequency v+=8v, vripple=100mvrms , rl=47k ? , mute=h ga in=l , ta=25 o c , filter=bandpass 0 10 20 30 40 50 60 70 80 10 100 1000 10000 100000 freauency[hz] psrr[db ] channelseparation vs frequency v+=8v, vin=0dbv , input=in1,2,4,5,6 , rl=47k ? mute=h , gain=l , ta=25 o c , filter=bandpass measure=out3 , cs=vin*gv/ measure 0 20 40 60 80 100 120 10 100 1000 10000 100000 freauency[hz] channelseparation[db] rg=0 ? rg=620 ? channelseparation vs frequency v+=8v, vin=0dbv , input=in1,2,4,5,6 , rg=620 ? rl=47k ? , mute=h , gain=l , filter=bandpass measure=out3 , cs=vin*gv/ measure 0 20 40 60 80 100 120 10 100 1000 10000 100000 freauency[hz] channelseparation[db] ta=-40 o c ta=25 o c ta=85 o c thd+n v s output v oltage v+=8v , rl=47k ? , mute=h , gain=l , ta=25 o c filter=22hz to 22khz 0.0001 0.001 0.01 0.1 1 10 0.01 0.1 1 10 output voltage[vrms] thd+n[% ] f=10khz f =100hz,1khz
NJW1240 ? 11 ? ? ? ? ? typical characteristics outputnoise vs fosc v+=8v, rg=0 ? , rl=47k ? , mute=h , gain=l ta=25 o c , filter=a-weighted -120 -100 -80 -60 -40 -20 0 0 200 400 600 800 1000 1200 fosc[khz] outputnoise[dbv] thd+n v s f os c v+=8v, vin=0dbv , f=1khz , rl=47k ? , mute=h gain=l , ta=25 o c , filter=400hz to 22khz 0.0001 0.001 0.01 0.1 0 200 400 600 800 1000 1200 fosc[khz] thd+n[% ] maximumoutputvoltage vs f osc v+=8v, f =1khz , input=in1~in6 , rl=47k ? mute=h , ga in=l , ta=25 o c , thd+n=1% filter=400hz to 22khz 4 4.5 5 5.5 6 0 200 400 600 800 1000 1200 fosc[khz] maximumoutputvoltage[vrms ] mutelevel vs mute terminal voltage v+=8v, vin=0dbv , f=1khz , rl=47k ? , gain=l ta=25 o c -100 -80 -60 -40 -20 0 20 00.511.522.53 mute terminal voltage[v] mutelevel[db] l->h h->l voltage gain vs gain terminal voltage v+=8v, vin=0dbv , f=1khz , rl=47k ? , mute=h ta=25 o c 5 6 7 8 9 10 0 0.5 1 1.5 2 2.5 3 gain teaminal voltage[v] voltagegain[db] l->h h- >l maximumoutputvoltage vs loadresistance v+=8v, f=1khz , input=in1~in6 , mute=h , gain=l fosc=internal , ta=25 o c , thd+n=1% filter=400hz to 22khz 2 3 4 5 6 7 8 1 10 100 roadresistance[k ? ] maximumoutputvoltage[vrms ] v+=10v v+=8v v+=6v
NJW1240 ? 12 ? [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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