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ver.4 njm2505a -1- single isolation amplifier general description package outline njm2505a is the single isolation amplifier developed by the video signal. it can remove the noise of a signal with isolation amplifier and carries in the small package (mtp5), it is suitable for the interface of the video signal of a car av system. features operating voltage 4.5 to 9.0v input: sync-tip clamp common mode noise rejection ratio ?55dbtyp. voltage gain 0dbtyp. frequency characteristics 0dbtyp.at 10mhz bipolar technology package mtp5 pin configuration block diagram NJM2505AF 4 3 2 1 5 1: vout 2: gnd 3: v+ 4: vin 5: vgnd vgnd v + vin vout gnd 4 3 2 1 5
ver.4 njm2505a - 2 - absolute maximum ratings (ta=25 c) parameter symbol ratings unit supply voltage v + 15.0 v power dissipation p d 200 mw operating temperature range topr -40 to +85 c storage temperature range tstg -40 to +125 c recommended operating condition (ta=25 c) parameter symbol test condition min. typ. max. unit operating voltage range vopr 4.5 - 9.0 v electrical characteristics ( v + =5.0v, ta=25 c) parametr symbol test condition min. typ. max. unit supply current i cc no signal - 3.0 6.0 ma maximum output voltage level vom vin=100khz,sin-signal,thd=1%, 2.0 2.2 - vp-p voltage gain gv vin=100khz,1.0vp-p,sin-signal -1.0 0 1.0 db frequency characteristics gf vin=10mhz / 1mhz ,1.0vppsin-signal -1.0 0 1.0 db common mode noise rejection ratio cmr vin=20khz,vin=1vpp - -55 - db differential gain dg vin=1.0vp-p,10step video signal - 0.3 - % differential phase dp vin=1.0vp-p,10step video signal - 0.4 - deg
ver.4 njm2505a - 3 - test circuit when cmr is measured, vgnd is connected with vin. application circuit + vout vgnd vin vcc gnd 2 1 3 5 4 njm2505a + + 2k
4.7uf 4.7uf 75
input resistance 10uf + 0.1uf input resistance 75
+ vout vgnd vin vcc gnd 2 1 3 5 4 njm2505a + + 2k
22uf 4.7uf 4.7uf 50
0.1uf 10uf +
ver.4 njm2505a - 4 - application 1: please connect input surge resistance to 4pin(vin) and 5pin(vgnd). please refer to fig. 1. if resistance is enlarged, a waveform may deteriorate. fig1: external connection fig2: input resistance vs. voltage gain fig3: input resistance vs. common mode rejection ratio -0.5 -0.4 -0.3 -0.2 -0.1 0 0.1 0.2 0.3 0.4 0.5 0 20 40 60 80 100 120 140 160 180 input resistance ( ? ) gv(db) -80 -75 -70 -65 -60 -55 -50 -45 -40 0 20 40 60 80 100 120 140 160 180 input resistance( ) cmr(db) 4,5pin njm2505 a surge resistance P 100 ? surge diode surge diode
ver.4 njm2505a - 5 - 2: please connect a diode in a vgnd at large common mode noise may be inputted into a vin(4pin) and vgnd(5pin). thereby, large common noise is restricted(refer to fig.4).current flows to a diode. be careful of current capacity. fig4: external connection 5pin njm2505 a vgnd
ver.4 njm2505a - 6 - equivalent circuit pin.no symbol inside equivalent circuit voitage 1 vout 0.92v 2 gnd - - 3 v + - - 4 vin 1.67v 5 vgnd 1.67v 31k ? 30k ? 240 ? 80 ?
ver.4 njm2505a -7- typical characteristics voltage gain vs. frequency common mode rejection ratio vs. frequency (vin=100khz,1.0vp-p,ta=25 c) (vin=1.0vp-p,ta=25 c) supply current vs. supply voltage maximum output voltage vs. supply voltage (ta=25 c) (vin=100khz,ta=25 c) voltage gain vs. supply voltage frequency characteristics vs. supply voltage (vin=100khz,1.0vpp,ta=25 c) (vin=1.0vpp,10mhz/1mhz,ta=25 c) -60 -50 -40 -30 -20 -10 10 100 1000 10 4 10 5 10 6 10 7 10 8 cmr[db] frequency [hz] -20 -15 -10 -5 0 5 10 5 10 6 10 7 10 8 gv[db] frequency [hz] 2.0 3.0 4.0 5.0 4.00 8.00 12.00 16.00 icc[ma] vcc [v] 2.0 2.5 3.0 3.5 4.00 8.00 12.00 16.00 vom[v] vcc [v] -1.0 -0.5 0.0 0.5 1.0 4.00 8.00 12.00 16.00 gv1[db] vcc [v] -1.0 -0.5 0.0 0.5 1.0 4.00 8.00 12.00 16.00 gf[db] vcc [v]
ver.4 njm2505a - 8 - typical characteristics ? common mode noise ratio vs. supply voltage differential gain vs. supply voltage (vin=20khz,1.0vpp,ta=25 c) (vin=1.0vpp,ta=25 c) differential phase vs. supply voltage (vin=1.0vpp, ta=25 c) supply current vs. ambient temperature maximum output voltage vs. ambient temperature (vcc=5v) (vcc=5v,vin=100khz) -80.0 -70.0 -60.0 -50.0 -40.0 -30.0 4.00 8.00 12.00 16.00 cmr[db] vcc [v] 0.0 0.2 0.4 0.6 0.8 1.0 4.00 8.00 12.00 16.00 dg[%] vcc [v] 0.0 0.2 0.4 0.6 0.8 1.0 4.00 8.00 12.00 16.00 dp[%] vcc [v] 2.0 2.5 3.0 3.5 4.0 4.5 5.0 -50.00 0.00 50.00 100.00 150.00 icc[ma] temp [ o c] 2.0 2.5 3.0 3.5 -50.00 0.00 50.00 100.00 150.00 vom[v] temp [ o c]
ver.4 njm2505a - 9 - typical characteristics voltage gain vs. ambient temperature frequency characteristics vs. ambient temperature (vcc=5v,vin=100khz,1.0vpp) (vcc=5v,vin=1.0vpp 10mhz/1mhz) common mode noise ratio vs. ambient temperature differential gain vs. ambient temperature (vcc=5v,vin=20khz,1.0vpp) (vcc=5v,vin=1.0vpp) differential phase vs. ambient temperature (vcc=5v,vin=1.0vpp) -1.0 -0.5 0.0 0.5 1.0 -50.00 0.00 50.00 100.00 150.00 gv1[db] temp [ o c] -1.0 -0.5 0.0 0.5 1.0 -50.00 0.00 50.00 100.00 150.00 gf[db] temp [ o c] -80.0 -70.0 -60.0 -50.0 -40.0 -30.0 -50.00 0.00 50.00 100.00 150.00 cmr[db] temp [ 6 c] 0.0 0.2 0.4 0.6 0.8 1.0 -50.00 0.00 50.00 100.00 150.00 dg[%] temp [ o c] 0.0 0.2 0.4 0.6 0.8 1.0 -50.00 0.00 50.00 100.00 150.00 dp[%] temp [ o c] [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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