njm2752 -1- ver.1.8 2-input / 1-output stereo audio selector general description package outline the njm2752 is 2-input / 1-output stereo audio selector. the njm2752 consists of switches and buffer operational amplifiers. based on the internal switch op-amp technology, the njm2752 features lower output noise, lower distortion and higher channel separation than the general multiplexers or analogue switches. the njm2752 contains compatibility with njm2753 (3in-1out sw),njm2755 (4in-1out sw). it is suitable for lcd-tv/pdp-tv, car stereo, and any audio system. features operating voltage 4.7 to 10v 2-input / 1-output audio selectors dual channel for stereo use low output noise -114dbv typ. low distortion 0.0009% typ. bipolar technology package outline tvsp10,ssop14 block diagram njm2752v NJM2752RB2 outb outa logic cnt1 vref vref v gnd in1a in1b in2a in2b
njm2752 - 2 - pin configurations njm2752/njm2753/njm2755 6 9 8 7 10 1 2 3 4 5 gnd outb in2a in1b in2b v re f v+ in1a outa cnt1 njm2752 njm2752(tvsp10) njm2755(ssop16) njm2753(ssop14) njm2752(ssop14) 8 9 10 13 12 11 14 1 2 3 4 5 6 7 in3a gnd outb in2a in1b in2b v re f in3b v+ in1a outa cnt1 n.c cnt2 njm2753 10 11 12 15 14 13 9 16 1 2 3 4 5 6 7 8 in3a in4a gnd outb in2a in1b in2b v re f in3b v+ in1a outa cnt1 in4b n.c cnt2 njm2755 8 9 10 13 12 11 14 1 2 3 4 5 6 7 n.c gnd outb in2a in1b in2b v re f n.c v+ in1a outa cnt1 n.c n.c njm2752
njm2752 -3- absolute maximum ratings (ta=25c) electrical characteristics ( ta=25c, v + =9v) parameter symbol test condition min. typ. max. unit operating voltage v + 4.7 9.0 10 v supply current i cc no signal - 10 15 ma reference voltage v ref - 4.5 - v voltage gain g v vin=1vrms, f=1khz -1 0 1 db total harmonic distortion thd+n vin=1vrms, f=1khz - 0.0009 0.03 % output noise voltage v no a-weighted - - -114 (2) -100 (10) dbv (vrms) maximum output voltage v om f=1khz, thd=1% 6 (2.0) 8 (2.5) - dbv (vrms) cross talk ct vin=1vrms, f=1khz, a-weighted 70 100 - db channel separation cs vin=1vrms, f=1khz, a-weighted 80 110 - db switch-on voltage level v ch 2.4 - - v switch-off voltage level v cl - - 0.5 v input impedance r in - 100 - k ? output impedance r out - 45 - ? switch control logic parameter symbol rating unit supply voltage v + 12 v power dissipation p d tvsp10 470 1) 640 2) ssop14 450 1) 570 2) note 1): eia/jedec standard test board (76.2x114.3x1.6mm, 2layer, fr-4) mounting 2): eia/jedec standard test board (76.2x114.3x1.6mm, 4layer, fr-4) mounting mw operating temperature range t opr -40 to +85 c storage temperature range t str -40 to +150 c cnt1 input selector ach / bch l 1 h 2
njm2752 - 4 - measurement circuit (ssop14) 8 9 10 13 12 11 14 1 2 3 4 5 6 7 n.c gnd outb in2a in1b in2b v re f n.c v+ in1a outa cnt1 n.c n.c njm2752 + + + + + + + + 10 f 10 f 10 f 10 f 10 f 10 f 10 f 100 f
njm2752 -5- application circuit (ssop14) application note: resister(100k) and capacitor(1 f) connected to cnt1 are added to reduce pop-noise. the value of input capacitor connected to in1a and in2a depends on cut-off frequency(calculated by fc=1/2 rc) you need. 8 9 10 13 12 11 14 1 2 3 4 5 6 7 n.c gnd outb in2a in1b in2b v re f n.c v+ in1a outa cnt1 n.c n.c njm2752 + + + + + + + + 10 f 10 f 10 f 10 f 10 f 10 f 10 f 100 f 100k 1 f
njm2752 - 6 - terminal description pin no. symbol function equivalent circuit terminal voltage 2 4 11 13 in1a in2a in2b in1b ach input terminal1 ach input terminal2 bch input terminal2 bch input terminal1 v+/2 5 cnt1 control switch terminal1 0v (gnd) 1 14 outa outb ach output terminal bch output terminal v+/2 10 vref reference terminal v+/2 3 12 v+ gnd power supply terminal gnd terminal v+ 0v 650 100k 3p in1a in2a in1b in2b 100k 650 cnt 650 50k 50k vref 45 100k outa outb 12k v + gnd
njm2752 -7- ! ! ! ! typical characteristics icc vs supply voltage no signal 0 2 4 6 8 10 12 14 02468101214 supply voltage [v] icc [ma ] 25 105 -40 thd+n vs frequency i/o: ina 1- a out 0.0001 0.001 0.01 0.1 1 10 100 1000 10000 100000 frequency [hz] thd+n [% ] -40 105 thd+n vs input voltage bw:10-22khz(f=100hz), 400-30khz(f=1khz, 10khz) i/o: ina 1- a out 0.0001 0.001 0.01 0.1 1 10 100 0.01 0.1 1 10 input voltage [vrms] thd+n [% ] -40 25 105 vref vs supply voltage no signal 0 1 2 3 4 5 6 7 02468101214 supply voltage [v] vref[v] -40 105 gain vs frequency v + =9v , i/o: ina 1- a out -1 -0.8 -0.6 -0.4 -0.2 0 0.2 0.4 0.6 0.8 1 10 100 1000 10000 100000 frequency [hz] gain output [db] -40 105 maximum output voltage vs frequency v + =9v, thd=1%, i/o: ina1-aout 2.3 2.35 2.4 2.45 2.5 2.55 2.6 2.65 2.7 1 10 100 1000 10000 100000 frequency [hz] maximum output voltage [vrms ]
njm2752 - 8 - ! ! ! ! typical characteristics maximum output voltage vs supply voltage thd=1%, i/o: ina1-1aout 0 0.5 1 1.5 2 2.5 3 3.5 4 02468101214 supply voltage [v] maximum output voltage [vrms ] maximum output voltage vs load resistance v + =9v, thd=1%, f=1khz, i/o: ina1-aout / inb1-bout 0.0 0.5 1.0 1.5 2.0 2.5 3.0 1 10 100 1000 10000 100000 rl[ ? ] maximum output voltage [vrms ] cross talk vs frequency v + =9v, vin=1vrms, bw:10-80khz, i/o: ina1-aout, select channel:2ch -110 -100 -90 -80 -70 -60 -50 -40 10 100 1000 10000 100000 frequency [hz] cross talk[db ] rg=0 ? rg=620 ? rg=3.3k ? rg=5.1k ? cross talk vs frequency v + =9v, vin=1vrms, bw:10-80khz, i/o: ina1-aout, select channel:2ch -110 -100 -90 -80 -70 -60 -50 -40 10 100 1000 10000 100000 frequency [hz] cross talk[db ] 105 25 -40 channel separation vs frequency v + =9v, vin=1vrms, bw:10-80khz, i/o: inb1- a out -110 -100 -90 -80 -70 -60 -50 -40 10 100 1000 10000 100000 frequency [hz] channel separation[db] rg=0 ? rg=620 ? rg=3.3k ? rg=5.1k ? channel separation vs frequency v + =9v, vin=1vrms, bw:10-80khz, i/o: inb1- a out -110 -100 -90 -80 -70 -60 -50 -40 10 100 1000 10000 100000 frequency [hz] channel separation[db] 105 25 -40
njm2752 -9- ! ! ! ! typical characteristics [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. cnt voltage vscross talk v + =9v, vin=1vrms, a-w eghit i/o: in2a-aout -130 -120 -110 -100 -90 -80 -70 -60 -50 -40 -30 -20 -10 0 10 00.511.52 cnt voltage[v] cross talk[db ] 105 -40 25 cnt voltage vscross talk v + =9v, vin=1vrms, a-w eghit i/o: in1a - a out -130 -120 -110 -100 -90 -80 -70 -60 -50 -40 -30 -20 -10 0 10 00.511.522.53 cnt voltage[v] cross talk[db ] 105 -40 25
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