NJW1241 ? 1 ? ver. 0.4e 3-chanels differential output line amplifier ? general description the NJW1241 is a differential output 3-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 /single-end output 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 l operating voltage 6.0v to +10v l operating current i dd =12ma typ. at v + =8v, r l =47k ? , no signal l maximum output voltage 5.0vrms min. @single-end output l low distortion 0.004% typ l output coupling capacitor-less l external synchronizing divide-by-2 l pop noise suppression circuit l external mute l gain select +6db/+8db l rf immunity opamp tolerant to fr noise. (ex. mobile phone) l bi-cmos technology l package outline ssop32 ? block diagram package outline NJW1241v in1 in2 in3 out1a out1b out2a out2b out3b out3a charge pu mp v - gain select v + detector pop noise suppression v + v - mute tr mute tr v + v - mute tr mute tr v + v - mute tr mute tr
NJW1241 ? 2 ? ? pin configuration no. symbol function no. symbol function 1 in1 input 1 17 nc no connect 2 ref1 reference 1 18 fb v- power supply external setting 3 in2 input 2 19 cp flying capacitor positive terminal 4 ref2 reference 2 20 nc no connect 5 in3 input 3 21 nc no connect 6 ref3 reference 3 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 out3b output 3b 12 nc no connect 28 out3a output 3a 13 nc no connect 29 out2b output 2b 14 clk external clock input 30 out2a output 2a 15 v + reg v+ power supply for regulator 31 out1b output 1b 16 nc no connect 32 out1a output 1a NJW1241
NJW1241 ? 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 / p u f
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 6.5 db voltage gain2 g v2 gain=high 7.5 8 8.5 db maximum output voltage v omax thd=1%, 5 - - vrms mute level v mute mute=low - -100 -80 db s/n ratio v no1 vin=500mvrms , a=weighted differential output - 100 - db total harmonic distortion thd bw:400hz-22khz, differential output - 0.004 - % channel separation cs rg=600 ? 80 - - db internal oscillating frequency f osc f clk =no signal - 300 - khz ? 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=8db 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
NJW1241 ? 4 ? ? terminal description terminal symbol function equivalent circuit voltage 1 3 5 in1 in2 in3 input1 input2 input3 0v 2 4 6 ref1 ref2 ref3 reference1 reference2 reference3 0v 7 8 mute gain mute/pop noise suppression gain select 0v 11 regcnt v- power control 0v 14 clk external clock input 0v 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) 1pf 50k ? 10k ? v + a v + a v + a v - in v - in 6.3k ?
NJW1241 ? 5 ? ? terminal description terminal symbol function equivalent circuit voltage 18 fb v- power supply external setting - 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 2pf 100 ? 1k ? reg(5v) v - out
NJW1241 ? 6 ? ? test circuit (i dd ) ? test circuit (gv, v omax , thd, v mute ) c1=1uf c5=1uf c7=1uf v + rl=47k ? rl=47k ? rl=47k ? rl=47k ? rl=47k ? rl=47k ? c2=1uf c3=1uf v + r2=680k ? c8=1uf v + reg regcnt 32 in1 out1a 1 31 2 30 in2 out2a 3 29 4 28 in3 out3a 5 27 6 negative voltage regulator pop noise suppression bias ref1 ref2 ref3 out1b out2b out3b 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 100k ? 100k ? v - in v - out [pin 10] c6=1uf c9=1uf mute mute 50k ? mute mute 50k ? mute mute 50k ? c10=100uf + a v + c1=1uf c5=1uf c7=1uf v + rl=47k ? rl=47k ? rl=47k ? rl=47k ? rl=47k ? rl=47k ? c2=1uf c3=1uf v + r2=680k ? c8=1uf v + reg regcnt 32 in1 out1a 1 31 2 30 in2 out2a 3 29 4 28 in3 out3a 5 27 6 negative voltage regulator pop noise suppression bias ref1 ref2 ref3 out1b out2b out3b 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 100k ? 100k ? v - in v - out [pin 10] c6=1uf c9=1uf mute mute 50k ? mute mute 50k ? mute mute 50k ? c10=10uf + v 3v~v +
NJW1241 ? 7 ? ? test circuit (v no ) ? test circuit (cs) c1=1uf c5=1uf c7=1uf v + rl=47k ? rl=47k ? rl=47k ? rl=47k ? rl=47k ? rl=47k ? c2=1uf c3=1uf v + r2=680k ? c8=1uf v + reg regcnt 32 in1 out1a 1 31 2 30 in2 out2a 3 29 4 28 in3 out3a 5 27 6 negative voltage regulator pop noise suppression bias ref1 ref2 ref3 out1b out2b out3b 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 100k ? 100k ? v - in v - out [pin 10] c6=1uf c9=1uf mute mute 50k ? mute mute 50k ? mute mute 50k ? c10=10uf + v v c1=1uf c5=1uf c7=1uf v + rl=47k ? rl=47k ? rl=47k ? rl=47k ? rl=47k ? rl=47k ? c2=1uf c3=1uf v + r2=680k ? c8=1uf v + reg regcnt 32 in1 out1a 1 31 2 30 in2 out2a 3 29 4 28 in3 out3a 5 27 6 negative voltage regulator pop noise suppression bias ref1 ref2 ref3 out1b out2b out3b 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 100k ? 100k ? v - in v - out [pin 10] c6=1uf c9=1uf mute mute 50k ? mute mute 50k ? mute mute 50k ? c10=10uf + v v
NJW1241 ? 8 ? ? application circuit [caution] the specifications on this databook are only given for information , without any guarantee as regards either mist akes 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. c1=1uf c5=1uf c7=1uf c4=1uf v + rl=47k ? rl=47k ? rl=47k ? rl=47k ? rl=47k ? rl=47k ? r1=10 ? c2=1uf c3=1uf 3v~v + v + r2=680k ? c8=1uf r3=1k ? v + reg regcnt 32 in1 out1a 1 31 2 30 in2 out2a 3 29 4 28 in3 out3a 5 27 6 negative voltage regulator pop noise suppression bias ref1 ref2 ref3 out1b out2b out3b 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 100k ? 100k ? v - in v - out [pin 10] c6=1uf c9=1uf mute mute 50k ? mute mute 50k ? mute mute 50k ? c10=100uf +
|
