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njm2739 - 1 - e1 dual precision operational amplifier general description package outline precision v io =60v max. v io =100v max. (ta=-40oc to +85oc) low offset drift v io / t=0.9v/oc max. (ta=-40oc to +85oc) specified for 15v and 5v operation cmr 128db min. low noise v ni =80nvrms typ. at f=1 to 100hz en=8nv/ hz typ. at f=100hz open loop gain av=130db min. guaranteed temperature ta=-40oc to +85oc unity gain stable operating voltage vopr=3v to 18v unity gain frequency f t =1.1mhz typ. supply current icc=3.2ma max. package emp8 features the njm2739 is a high performance oper ational amplifier featured very low offset voltage and drift. features are low offset voltage and drift, hi common mode rejection, low noise and open loop gain. dc characteristics are100% tested and specified from ? 40 oc to 85 oc. the njm2739 is suitable for high gain circuit amplif ied small signal and sets required stable behavior over a wide temperature range. apprication t hermocouple sensor bridge amplifier current sensor instrumentation amplifier reference voltage circuit pin configuration package description NJM2739E 5.00.3 1.27 3.90.2 6.00.4 8 5 1 4 0.74max 8 7 6 5 1 2 3 4 a b outpu t v ? ? input a +input a v + +input b output b ? input b (top view)
njm2739 - 2 - e1 absolute maximum rating (ta=25 o c unless otherwise specified) parameter symbol rating unit supply voltage v + /v - 20 v common mode input voltage range (note1 ) v icm 20 v differential input voltage range v id 30 v power dissipation (note2) p d 640 mw operating temperature range topr -40~+85 oc storage temperature range tstg -50~+125 oc (note1) for supply voltage less than 20v, the ma ximum input voltage is equal to the supply voltage. (note2) mounted on the eia/jedec standard board (114.376. 21.6mm, two layer, fr-4). recommended operating voltage parameter symbol test condition min. typ. max. unit supply voltage v + /v - 3 - 18 v electronic characteristics (v + /v - =15v ta=+25oc, v cm =0v unless otherwise specified) dc characteristics parameter symbol test condition min. typ. max. unit input characteristics input offset voltage v io 1 - 20 60 v v io 2 ta=-40oc ~+85oc - 20 100 v input offset voltage drift vio/ t ta=-40oc +25oc / ta=+25oc +85oc - 0.3 0.9 v/oc common mode input voltage range v icm 1 13 14 - v v icm 1 ta=-40oc ~+85oc 13 13.5 - db common mode rejection ratio cmr1 v cm =0v -13v / v cm =0v +13v 128 135 - db cmr2 ta=-40oc ~+85oc, v cm =0v -13v / v cm =0v +13v 120 130 - db supply voltage rejection ratio svr1 v+/v-=3v~18v 115 125 - db svr2 ta=-40oc ~+85oc, v+/v-=3v~18v 110 120 - db input bias current i b 1 -0.2 1.2 2.8 na i b 2 ta=-40oc ~+85oc -1.5 1.7 6 na input bias current drift i b / t ta=-40oc +85oc - 8 60 pa/oc input offset current i io 1 - 0.3 2.8 na i io 2 ta=-40oc ~+85oc - 0.3 4.5 na input offset current drift i io / t ta=-40oc +85oc - 1.5 72 pa/oc differential input impedance r id *1 - 90 - m ? common-mode input impedance r ic *1 - 800 - g ? voltage gain av1 r l =2k ? , vo= -10v 0v / 0v +10v / -10v +10v 130 142 - db av2 ta=-40oc ~+85oc, r l =2k ? , vo= -10v 0v / 0v +10v / -10v +10v 126 136 - db channel separation cs dc - 0.01 - v/v output characteristics maximum output voltage v om 1 r l =10k ? 13.5 14.0 - v v om 2 ta=-40oc ~+85oc, r l =10k ? 13.0 14.0 - v v om 3 r l =2k ? 12.5 13.0 - v v om 4 ta=-40oc ~+85oc, r l =2k ? 12.0 13.0 - v v om 5 r l =1k ? 12.0 12.5 - v output resistance r o open-loop - 60 - ? supply characteristics supply current i cc 1 a v =+1, r l = - 2.6 3.2 ma i cc 2 ta=-40oc ~+85oc, av=+1, r l = - 2.7 3.4 ma i cc 3 v + /v - =3v, a v =+1, r l = - 1.3 1.6 ma p d 1 a v=+1, r l = - 78 96 mw p d 1 v + /v - =3v, a v =+1, r l = - 81 102 mw *1 theoretical value by design
njm2739 - 3 - e1 ac characteristics parameter symbol test condition min. typ. max. unit frequency characteristics unity gain frequency f t a v =+100, r l =2k ? , c l =10pf - 1.1 - mhz slew rate +sr rise, a v =+1, v in =1vpp, r l =2k ? 0.1 0.3 - v/ s -sr fall, a v =+1, v in =1vpp, r l =2k ? 0.1 0.3 - v/ s noise characteristics equivalent input noise voltage v ni fo=1hz~100hz - 80 - nvrms equivalent input noise current i ni fo=1hz~100hz - 3 - parms electronic characteristics (v + /v - =5v ta=+25oc, v cm =0v unless otherwise specified) parameter symbol test condition min. typ. max. unit input characteristics input offset voltage v io 1 - 30 70 v v io 2 ta=-40oc ~+85oc - 35 110 v common mode input voltage range v icm 1 3 3.9 - v v icm 1 ta=-40oc ~+85oc 3 3.5 - db common mode rejection ratio cmr1 v cm =0v -3v / v cm =0v +3v 115 125 - db cmr2 ta=-40oc ~+85oc, v cm =0v -3v / v cm =0v +3v 105 118 - db input bias current i b 1 -0.2 0.7 2.0 na i b 2 ta=-40oc ~+85oc -0.2 1.0 6.0 na input offset current i io 1 - 0.3 2.8 na i io 2 ta=-40oc ~+85oc - 0.3 4.5 na voltage gain av1 r l =2k ? , vo= -3v 0v / 0v +3v / -3v +3v 115 130 - db av2 ta=-40oc ~+85oc, r l =2k ? , vo= -3v 0v / 0v +3v / -3v +3v 110 125 - db channel separation cs dc - 0.01 - v/v output characteristics maximum output voltage v om 1 r l =10k ? 3.5 4.0 - v v om 2 ta=-40oc ~+85oc, r l =10k ? 3.5 4.0 - v v om 3 r l =2k ? 3.5 4.0 - v v om 4 ta=-40oc ~+85oc, r l =2k ? 3.5 4.0 - v supply characteristics supply current i cc 1 a v =+1, r l = - 1.6 2.0 ma i cc 2 ta=-40oc ~+85oc, a v =+1, rl= - 1.7 2.1 ma
njm2739 - 4 - e1 explanation of meas urement condition parameter explanation input offset voltage drift i nput offset voltage drift = v io / t t : amount of temperature change. v io : amount of input offset voltage. common mode input voltage range a range of input volt age at which the operational amplifier can function. common mode rejection ratio cmr = 20log | ( v in / v io )| v in : amount of input voltage. v io : amount of input offset voltage. supply voltage rejection ratio svr = 20log |( v s / v io )| v s : amount of supply voltage. v io : amount of input offset voltage. common mode input impedance r incm = v in / i b v in : amount of input voltage. i b : amount of input bias current. voltage gain av = 20log |( v in / v o )| v o : amount of output voltage. v in : amount of input voltage.
njm2739 - 5 - e1 typical characteristics 0 5 10 15 20 25 30 35 40 -1 -0.8 -0.6 -0.4 -0.2 0 0.2 0.4 0.6 0.8 1 input offset volta g e drift d istribution v + /v - = 5v,ta=-40 to 25 n um ber o f am plifiers inpu t offse t volta g e drift [ v/] 0 5 10 15 20 25 30 -1 -0.8 -0.6 -0.4 -0.2 0 0.2 0.4 0.6 0.8 1 input o ffset volta g e drift distribution v + /v - = 15v,ta=-40 to 25 number of amplifiers input offset volta g e drift [ v/] 0 5 10 15 20 25 30 35 40 -1 -0.8 -0.6 -0.4 -0.2 0 0.2 0.4 0.6 0.8 1 input offset volotage drift distribution v + /v - = 5v,ta=25 to 85 number of amplifiers in p u t o ffse t v o lta g e d rift [ v/] 0 5 10 15 20 25 30 35 40 -1 -0.8 -0.6 -0.4 -0.2 0 0.2 0.4 0.6 0.8 1 input o ffset volta g e drift d istrib ution v + /v - = 15v,ta=25 to 85 number of amplifiers input offset volta g e drift [ v/] 0 10 20 30 40 50 -70-60-50-40-30-20-10 0 10 20 30 40 50 60 70 input offset voltage distribution v + /v - = 5v,ta=25 number of amplifiers input offset voltage [ v] 0 10 20 30 40 50 -70-60-50-40-30-20-10 0 10 20 30 40 50 60 70 input o ffset volta g e distribution v + /v - = 15v,ta=25 number of amplifiers input offset voltage [ v]
njm2739 - 6 - e1 typical characteristics -100 -50 0 50 100 -50 -25 0 25 50 75 100 125 input offset volta g e vs. tem pera ture (supply voltage) v cm =0v input offset voltage [ v] ambient temperature [] sample2 ( 15v) sample1 ( 15v) sample3 ( 15v) sample3 ( 5v) sample2 ( 5v) sample1 ( 5v) -10 0 10 20 30 40 50 04812162024 input offset voltage vs. supply voltage v cm =0v input offset voltge [ v] supply voltage [ v] sample2 sample1 sample3 -1 0 1 2 3 4 0 4 8 12 16 20 24 input bias curent vs. supply voltage v cm =0v input bias current [na] supply voltage [ v] sample2 sample1 sample3 -100 -50 0 50 100 -50 -25 0 25 50 75 100 125 input offset voltage vs. temperature (supply voltage) v cm =0v input offset voltge [ v] ambient temperature [] v + /v - = 18v v + /v - = 15v v + /v - = 5v v + /v - = 3v input offset voltage vs. temperature v + /v - =15v, v cm =0v -100 -80 -60 -40 -20 0 20 40 60 80 100 -50 -25 0 25 50 75 100 ambient temperature [oc] input offset voltage [ v] input offset voltage vs. temperature v + /v - =5v, v cm =0v -100 -80 -60 -40 -20 0 20 40 60 80 100 -50 -25 0 25 50 75 100 ambient temperature [oc] input offset voltage [ v]
njm2739 - 7 - e1 typical characteristics -20 -10 0 10 20 30 40 50 60 -15 -10 -5 0 5 10 15 input offset voltag e vs. com m on m ode input voltag e (temperature) v + /v - = 15v input offset voltage [ v] common mode input voltage [v] ta=-40 ta=25 ta=85 0 10 20 30 40 50 0 4 8 12162024 input offset voltage vs. supply voltage (temperature) vcm=0v input offset volta g e [ v] supply voltage [ v] ta=-40 ta=25 ta=85 -1 0 1 2 3 4 0 50 100 150 200 w arm up input offset voltage drift v + /v - = 15v, gv=100db, ta=25 input offset voltage change [ v] tim e from power supply turn on [sec] -20 -10 0 10 20 30 40 50 60 -20 -15 -10 -5 0 5 10 15 20 input offset voltag e vs. com m on m ode input voltag e (supply voltage) ta=25 input offset voltage [ v] common mode input voltage [v] v+/v-= 18v v+/v-= 15v v+/v-= 5v v+/v-= 3v -8 -6 -4 -2 0 2 4 6 8 -15 -10 -5 0 5 10 15 variation in input offset voltage vs. common mode input voltage variation in input offset voltage [v] common mode input voltage [v] -20 -10 0 10 20 30 40 50 60 -15 -10 -5 0 5 10 15 input offset voltage vs. common mode input voltage (supply voltage) ta=25 input offset voltage [ v] common mode input voltage [v] sample2 ( 15v) sample1 ( 15v) sample3 ( 15v) sample3 ( 5v) sample2 ( 5v) sample1 ( 5v)
njm2739 - 8 - e1 typical characteristics -16.5 -16 -15.5 -15 -14.5 -14 -13.5 -13 -12.5 -15 -10 -5 0 5 10 15 input o ffset volta g e vs. o utput volta g e v + /v - = 15v, gv=100db, r l =2k, ta=25 input offset voltage [uv] output voltage [v] -0.8 -0.6 -0.4 -0.2 0 0.2 0.4 0.6 0.8 0246810 equivalent input noise voltage v + /v - = 15v, bp=1~ 100hz equivalent input noise voltagte [ v] time [sec] -0.8 -0.6 -0.4 -0.2 0 0.2 0.4 0.6 0.8 0246810 equivalent input noise voltage v + /v - = 5v, bp=1~ 100hz equivalent input noise voltage [ v] time [sec] 0 2 4 6 8 10 12 14 16 1 10 100 1000 equivalent input noise voltage rf=10k , rs=100 , rg=100 , ta=25 equivalent input noise voltage [nv/ hz] frequency [hz] v + /v - = 15v v + /v - = 5v 0 0.5 1 1.5 2 2.5 3 3.5 4 0 4 8 12162024 supply current vs. supply voltag e (tem perature) r l = s u p p l y c u r r e n t [ m a ] supply voltage [ v] ta=-40 ta=25 ta=85 0 0.5 1 1.5 2 2.5 3 3.5 4 -50 -25 0 25 50 75 100 125 supply current vs. temperature (supply voltage) r l = s u p p l y c u r r e n t [ m a ] ambient temperature [] v + /v - = 18v v + /v - = 15v v + /v - = 5v v + /v - = 3v
njm2739 - 9 - e1 typical characteristics -1 -0.5 0 0.5 1 1.5 2 2.5 3 -15 -10 -5 0 5 10 15 input bia s cu rrent vs. com m on m ode input volta g e (temperature) v + /v - = 15v input bias current [na] common mode input voltage [v] ta=-40 ta=25 ta=85 0 2 4 6 8 10 -50 -25 0 25 50 75 100 125 input bias current vs. tem pera ture (supply voltage) v cm =0v input bias current [na] ambient temperature [] v + /v - = 18v v + /v - = 15v v + /v - = 5v v + /v - = 3v -1 -0.5 0 0.5 1 1.5 2 2.5 3 -20-15-10-5 0 5 101520 input bias current vs. common mode input voltage (supply voltage) ta=25 input bias current [na] common mode input voltage [v] v + /v - = 18v v + /v - = 15v v + /v - = 5v v + /v - = 3v -1 0 1 2 3 4 5 6 -50-25 0 255075100125 input offset current vs. temperature (supply voltage) v cm =0v input offset current [na] ambient temperature [] v + /v - = 18v v + /v - = 15v v + /v - = 5v v + /v - = 3v 0 2 4 6 8 10 -50 -25 0 25 50 75 100 125 input bias current vs. temperature (supply voltage) v cm =0v input bias current [na] ambient temperature [] sample2 ( 15v) sample1 ( 15v) sample3 ( 15v) sample3 ( 5v) sample2 ( 5v) sample1 ( 5v) 0 1 2 3 4 5 -50 -25 0 25 50 75 100 125 input offset current vs. temperature (supply voltage) v cm =0v input offset current [na] ambient temperature [] sample2 ( 15v) sample1 ( 15v) sample3 ( 15v) sample3 ( 5v) sample2 ( 5v) sample1 ( 5v)
njm2739 - 10 - e1 typical characteristics -2 -1.5 -1 -0.5 0 0.5 1 1.5 2 -15 -10 -5 0 5 10 15 input offset current vs. common mode input voltage (temperature) v + /v - = 15v input offset current [na] common mode input voltage [v] ta=-40 ta=25 ta=85 0 50 100 150 200 -50-250 255075100125 supply volta g e r ejection r a tio vs. tem pera ture v + /v - = 18v to 3v supply volta g e r ejection r a tio [db] temperature [] 20 40 60 80 100 120 140 10 0 10 1 10 2 10 3 10 4 supply volta g e r ejection r a tio vs. f requency v + /v - = 14.5 to 15. 5v, g v= 80db, ta = 2 5 supply voltage rejection ratio [db] frequency [hz] -svr +svr -2 -1.5 -1 -0.5 0 0.5 1 1.5 2 -20 -15 -10 -5 0 5 10 15 20 input offset current vs. com m on m ode input volta g e (supply voltage) ta=25 input offset current [na] common mode input voltage [v] v + /v - = 18v v + /v - = 15v v + /v - = 5v v + /v - = 3v 40 60 80 100 120 140 10 2 10 3 10 4 10 5 common mode rejection ratio vs. frequency v + /v - = 15v, gv=80db, ta=25 common mode rejection ratio [db] frequency [hz] 0 50 100 150 200 -50 -25 0 25 50 75 100 125 common mode rejection ratio vs. temperature (supply voltage) v icm =v - + 2v to v + -2 v common mode rejection ratio [db] ambient temperature [] v + /v - = 18v v + /v - = 15v v + /v - = 5v v + /v - = 3v
njm2739 - 11 - e1 typical characteristics -20 -15 -10 -5 0 5 10 15 20 -50 -25 0 25 50 75 100 125 maximum output voltage vs. temperature (supply voltage) r l =2k maximum output voltage [v] ambient temperature [] v + /v - = 18v v + /v - = 18v v + /v - = 15v v + /v - = 15v v + /v - = 5v v + /v - = 5v v + /v - = 3v v + /v - = 3v 0 50 100 150 200 -50 -25 0 25 50 75 100 125 voltage gain vs. temperature (supply voltage) r l =2k voltage gain [db] ambient temperature [] v + /v - = 18v v + /v - = 15v v + /v - = 5v v + /v - = 3v 100 110 120 130 140 150 160 04812162024 voltage gain vs. supply voltage (temperature) r l =2k voltage gain [db] supply voltage [ v] ta=-40 ta=25 ta=85 -15 -10 -5 0 5 10 15 0 5 10 15 20 25 30 35 40 output voltage vs. output current v + /v - = 15v output current [v] output current [ma] +v om ta = 25 -v om ta = 25 +v om ta =-40 -v om ta = -40 -v om ta = 85 +v om ta = 85 -20 -15 -10 -5 0 5 10 15 20 10 1 10 2 10 3 10 4 10 5 m a x i m u m o u tp u t v o lta g e v s . lo a d r e s is ta n ce (supply voltage) ta=25 maximum output voltage [v] load resistance [] v + /v - = 18v v + /v - = 18v v + /v - = 15v v + /v - = 15v v + /v - = 5v v + /v - = 5v v + /v - = 3v v + /v - = 3v -15 -10 -5 0 5 10 15 10 1 10 2 10 3 10 4 10 5 maximum output voltage vs. load resistance (temperature) v + /v - = 15v maximum output voltage [v] load resistance [] ta=-40 ta=-40 ta=25 ta=25 ta=85 ta=85
njm2739 - 12 - e1 typical characteristics 0.0001 0.001 0.01 0.1 1 10 0.01 0.1 1 10 th d + n v s . o u tp u t v o lta g e v + /v - = 15v, gv=20db, r f =10k, rs=1k, ta=25 thd+n [% ] o u tp u t v o lta g e [v rm s ] f= 20h z f=100hz f=1khz f= 20kh z 0 0.2 0.4 0.6 0.8 1 10 100 1000 10 4 10 5 10 6 thd+n vs. frequency v + /v - = 15v, gv=20db, r f =10k, rs=1k, vout=100mvrms, ta=25 thd+n [% ] frequency [hz] -40 -20 0 20 40 60 80 -180 -120 -60 0 60 120 180 10 2 10 3 10 4 10 5 10 6 10 7 40db gain/phase vs. frequency (temperature) v + /v - = 15v, gv=40db, r f =10k, rs=100, r t =50 voltage gain [db] phase [deg] frequency [hz] gain phase ta=25 ta=85 ta=-40 ta=85 ta=-40 ta=25 -40 -20 0 20 40 60 80 -180 -120 -60 0 60 120 180 10 2 10 3 10 4 10 5 10 6 10 7 40db gain/phase vs. frequency (load capacitance) v + /v - = 15v, gv=40db, r f =10k, rs=100, r t =50, ta=25 voltage gain [db] phase [deg] frequency [hz] gain phase c l =0f c l =0.2 f c l =0.1 f c l =0.01 f c l =0.047 f c l =0f c l =0.2 f c l =0.1 f c l =0.01 f c l =0.047 f -40 -20 0 20 40 60 80 -180 -120 -60 0 60 120 180 10 2 10 3 10 4 10 5 10 6 10 7 40db gain/phase vs. frequency (supply voltage) gv=40db, r f =10k, rs=100, r t =50 , ta=25 voltage gain [db] phase [deg] frequency [hz] gain phase v + /v - = 15v v + /v - = 5v v + /v - = 3v v + /v - = 3v v + /v - = 18v v + /v - = 5v v + /v - = 18v v + /v - = 15v -40 -20 0 20 40 60 80 -180 -120 -60 0 60 120 180 10 2 10 3 10 4 10 5 10 6 10 7 40db gain/phase vs. frequency (temperature) v + /v - = 5v, gv=40db, r f =10k, rs=100, r t =50 voltage gain [db] phase [deg] frequency [hz] gain phase ta=25 ta=85 ta=-40 ta=85 ta=-40 ta=25
njm2739 - 13 - e1 typical characteristics -10 -5 0 5 10 15 20 10 3 10 4 10 5 10 6 v.f.peak (temperature) v + /v - = 15v, gv=0db, r t =50 , c l =0.1 f voltage gain [db] frequency [hz] ta=25 ta=85 ta=-40 -10 -5 0 5 10 15 20 10 3 10 4 10 5 10 6 v.f.peak (load capacitance) v + /v - = 15v, gv=0db, r t =50, ta=25 voltage gain [db] frequency [hz] c l =0f c l =0.01 f c l =0.047 f c l =0.2 f c l =0.1 f -0.8 -0.4 0 0.4 0.8 1.2 1.6 2 -2 -1.6 -1.2 -0.8 -0.4 0 0.4 0.8 -2 -1 0 1 2 3 4 5 6 pulse response (temperature) v + /v - = 15v, r l =2k, c l =5pf output [v] input [v] time [ s] ta=-40 ta=25 ta=85 input output -10 -5 0 5 10 15 20 10 3 10 4 10 5 10 6 v.f. peak (supply voltage) gv=0db, r t =50, c l =0.1 f, ta=25 voltage gain [db] frequency [hz] v + /v - = 15v v + /v - = 3v v + /v - = 5v v + /v - = 18v -0.8 -0.4 0 0.4 0.8 1.2 1.6 2 -2 -1.6 -1.2 -0.8 -0.4 0 0.4 0.8 -2-10123456 pulse response (temperature) v + /v - = 15v, r l =2k, c l =5pf output [v] input [v] time [ s] ta=-40 ta=25 ta=85 input output
njm2739 - 14 - e1 typical characteristics -0.8 -0.4 0 0.4 0.8 1.2 1.6 2 -2 -1.6 -1.2 -0.8 -0.4 0 0.4 0.8 -20-10 0 102030405060 pulse response (load capacitance) v + /v - = 15v, r l =2k, ta=25 output [v] input [v] time [ s] c l =0.01 f input output c l =0.047 f c l =0.1 f c l =0.2 f -0.8 -0.4 0 0.4 0.8 1.2 1.6 2 -2 -1.6 -1.2 -0.8 -0.4 0 0.4 0.8 -20-10 0 102030405060 pulse response (load capacitance) v + /v - = 15v, r l =2k, ta=25 output [v] input [v] time [ s] c l =0.01 f input output c l =0.047 f c l =0.1 f c l =0.2 f -0.8 -0.4 0 0.4 0.8 1.2 1.6 2 -2 -1.6 -1.2 -0.8 -0.4 0 0.4 0.8 -2 -1 0 1 2 3 4 5 6 pulse response (tem pera ture) v + /v - = 5v, r l =2k, c l =5pf output [v] input [v] time [ s] ta=-40 ta=25 ta=85 input output -0.8 -0.4 0 0.4 0.8 1.2 1.6 2 -2 -1.6 -1.2 -0.8 -0.4 0 0.4 0.8 -2 -1 0 1 2 3 4 5 6 pulse response (temperature) v + /v - = 5v, r l =2k, c l =5pf output [v] input [v] tim e [ s] ta=-40 ta=25 ta=85 input output -0.8 -0.4 0 0.4 0.8 1.2 1.6 2 -2 -1.6 -1.2 -0.8 -0.4 0 0.4 0.8 -5 0 5 10 pulse response (supply voltage, load capacitance) rl=2k, ta=25 output [v] input [v] time [ s] v + /v - = 15v c l =100pf input output v + /v - = 15v c l =1500pf v + /v - = 5v c l =1500pf v + /v - = 5v c l =100pf -0.8 -0.4 0 0.4 0.8 1.2 1.6 2 -2 -1.6 -1.2 -0.8 -0.4 0 0.4 0.8 -5 0 5 10 pulse response (supply voltage, load capacitance) r l =2k, ta=25 output [v] input [v] tim e [ s] v + /v - = 15v c l =100pf input output v + /v - = 15v c l =1500pf v + /v - = 5v c l =1500pf v + /v - = 5v c l =100pf
njm2739 - 15 - e1 typical characteristics 0 0.5 1 1.5 2 -50 -25 0 25 50 75 100 125 u nity g a in frequency vs. tem perature gv=40db, r f =10k, rs=100, r t =50 unity gain frequency [mhz] temperature [] v + /v - = 15v v + /v - = 5v 0 0.2 0.4 0.6 0.8 1 -50 -25 0 25 50 75 100 125 slew rate vs. temperature r l =2k slew rate [v/ s] ambient temperature [] v + /v - = 15v rise v + /v - = 15v fall v + /v - = 5v rise v + /v - = 5v fall
njm2739 - 16 - e1 application information power supply bypassing the njm2739 is a high precision operational amplifier featuring low offset voltage, high voltage gain, high cmr, high svr and so on. to maximize such a high performance with stable operation, the njm2739 should be operated by clean and low impedance supply voltage. so, the bypass capacitor should be connected to the njm2739?s both power supply terminals (v+ and v-) as shown in fig.1. the bypass capacitors should be placed as close as possible to ic package thermoelectric effect the njm2739 is a high precision operational amplifier featurin g low offset voltage and low offset voltage thermal drift. to achieve such a high performance, take care about thermoelectric effect possibly occurs on each input terminal of the njm2739. generally, if there are thermal mismatches at the j unction of different types of metals, the thermoelectric voltage (seebeck effect) occurs at the junction. the thermoelectric voltages possibly occur at the junction of pcb metal patterns and njm2739?s each input terminal metal. if there is thermal mismatch in-between njm2739?s each input terminal metal, the thermoelectric voltages generated on each input terminal possibly have different voltage each. this voltage difference causes offset voltage and offset voltage thermal drift of t he njm2739. to minimize this voltage difference, the thermal mismatch in-between njm2739?s each input terminal and pcb metal should be minimized. differential amplifier differential amplifier (see below fig.2) is used in high accuracy circuit to improve common mode rejection ratio (cmr). a matching between the ratio r1/r2 = r3/r4 and r1=r3 makes the high cmr. for example, acceptable error range to obtain cmr of 130db or more is about 0.1ppm. fig.1 power supply bypassing circuit fig.2 differential amplifier ? + v+ v- 2 3 4 6 7 njm2739 ? + v+ v- 2 3 4 6 7 njm2739 r 1 r 2 r 3 r 4
njm2739 - 17 - e1 [caution] the specifications on this data book are only given for information, without any guarantee as regards either mistakes or omissions. the application circuits in this data book 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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