[ak2929] rev.1.00ea 2012/4 - 1 - ak2929 zero drift operational amplifiers feature ak2929 is the dual channel cmos operational amplifires wh ich is available to output with very low input offset voltage (+/- 1.0 v) and near zero input offset dirft. it?s operated with very small current consumptions, 700 a typ./ch (vdd:3.2v +/- 5%), wh ich is available to operate full swing signals in output. ak2929 is appropriated to sensor pre amp. applications. ? low voltage, single supply operation : 2.7v - 5.5v ? very low input offset voltage : +/- 1.0 v typ. ? near zero dirft over time and temperature : +/- 2.0nv/ c typ. ? full swing outputs to 10k load ? power supply current : 700 a typ./ch (vdd: 3.2v +/- 5%, no load) ? gain bandwidth : 2mhz typ. ? package : tmsop8 part name channel number package AK2929T 2 tmsop8 pin location tmsop8 (AK2929T) 2:nina 4:vss 1:outa 8:vdd 5:pinb 3:pina 7:outb 6:ninb a b
[ak2929] rev.1.00ea 2012/4 - 2 - pin function descriptions pin number name i/o note) function 1 outa ao amplifier a output 2 nina ai amplifier a inverted input 3 pina ai amplifier a no inverted input 4 vss pwr power supply ground 5 pinb ai amplifier b no inverted input 6 ninb ai amplifier b inverted input 7 outb ao amplifier b output 8 vdd pwr positive power supply note) pwr : power supply ai : analog input ao : analog output absolute maximum ratings vss=0v ; note parameter symbol min max units supply voltage vdd -0.3 6.5 v input voltage v td -0.3 vdd + 0.3 v input current i in -10 +10 ma storage temperature range t stg -55 150 c note : all voltage with respect to ground warning : operational at or beyond these limits may result in permanent damage to the device. normal operation is not guaranteed at these extremes. recommended opera ting conditions parameter symbol min. typ. max. units conditions operationg temperature range t a -40 85 c supply voltage vdd 2.7 5.5 v power supply current idd1 0.7 1.1 ma/ch. vdd=3.2v +/- 5%, no load *we asuumes no responsibility for the usage beyond the conditions in this datasheet.
[ak2929] rev.1.00ea 2012/4 - 3 - electrical characteristics ? dc characteristics vdd:5v, ta:-40 to 85 c, unless otherwise noted parameter min. typ. max. units conditions input voltage offset +/- 1 +/- 10 c input bias current +/- 20 pa input common mode range 0.0 ? vdd-0.2 v output voltage swing 0.03 ? vdd-0.03 v rl 10k connected to vdd/2 common mode rejection ratio 90 130 db power supply rejection ratio 100 130 db large signal voltage gain 100 130 db rl 10k connected to vdd/2 short circuit current +/- 40 ma output current +/- 20 ma ? ac characteristics vdd:5v, ta:-40 to 85 c, unless otherwise noted parameter min. typ. max. units conditions gain bandwidth 2 mhz av:1v/v slew rate 1 v/ hz f:1khz 0.1 ? 10hz 0.5
[ak2929] rev.1.00ea 2012/4 - 4 - typical operating characteristics ? supply current vs. temperature (vin:1/2vdd) ? supply current vs. supply voltage (vin:1/2vdd) idd-t emperature 0 500 1000 1500 2000 2500 -40-200 20406080 t emperature [c] idd [ a] 2.7v 5.0v idd-vdd (ta = 25c) 0 500 1000 1500 2000 2500 01 234 56 supply voltage [v] idd [ a]
[ak2929] rev.1.00ea 2012/4 - 5 - ? output voltage vs. load current ? output voltage vs. load current (vdd=2.7v, ta=25 c) (vdd=5v, ta=25 c) ? closed loop gain vs. frequency ? closed loop gain vs. frequency (vdd=2.7v, ta=25 c) (vdd=5v, ta=25 c) isource / isink - vol / voh 0.01 0.1 1 10 100 1000 10000 0.0001 0.001 0.01 0.1 1 10 isource / isink [ma] vol / voh [mv] source sink isouce / isink - vol / voh 0.01 0.1 1 10 100 1000 10000 0.0001 0.001 0.01 0.1 1 10 isource / isink [ma] vol / voh [mv] source sink closed loop gain -30 -20 -10 0 10 20 30 40 50 60 70 1.e+00 1.e+01 1.e+02 1.e+03 1.e+04 1.e+05 1.e+06 1.e+07 frequency [hz] closed loop gain [db] av = 100, rl = 2k ? av = 10, rl = 2k ? av = 1, rl = 2k ? closed loop gain -30 -20 -10 0 10 20 30 40 50 60 70 1.e+00 1 .e+01 1.e+02 1.e+03 1.e+04 1.e+05 1.e+06 1.e+07 frequency [hz] closed loop gain [db] av = 100, rl = 2k av = 10, rl = 2k av = 1, rl = 2k
[ak2929] rev.1.00ea 2012/4 - 6 - ? open loop gain and phase vs. frequency ? open loop gain and phase vs. frequency (vdd=2.7v, ta=25 c) (vdd=5v, ta=25 c) ? output impedance vs. frequency ? output impedance vs. frequency (vdd=2.7v, ta=25 c) (vdd=5v, ta=25 c) open loop gain and phase vs. frequency -20 -10 0 10 20 30 40 50 60 70 1.e+03 1.e+04 1.e+05 1.e+06 1.e+07 frequency [hz] open loop gain [db] -180 -140 -100 -60 -20 20 60 100 140 180 phase [degrees] gain phase open loop gain and phase vs. frequency -20 -10 0 10 20 30 40 50 60 70 1.e+03 1.e+04 1.e+05 1.e+06 1.e+07 frequency [hz] open loop gain [db] -180 -140 -100 -60 -20 20 60 100 140 180 phase [degrees] gain phase output impedance vs. frequency 0 50 100 150 200 250 300 1.e+01 1.e+02 1.e+03 1.e+04 1.e+05 1.e+06 1.e+07 frequency [hz] output impedance[ ] av=1 av=10 av=100 output impedance vs. frequency 0 50 100 150 200 250 1.e+01 1.e+02 1.e+03 1.e+04 1.e+05 1.e+06 1.e+07 frequency [hz] output impedance [ ] av=1 av=10 av=100 output impedance[ ] output impedance[ ]
[ak2929] rev.1.00ea 2012/4 - 7 - ? large signal transient response ? large signal transient response (vdd/vss = +1.35v/- 1.35v, (vdd/vss = +2.5v/-2.5v ta = 25c, cl = 150pf) ta = 25c, cl = 150pf) ? small signal transient response ? small signal transient response (vdd/vss = +1.35v/- 1.35v, (vdd/vss = +2.5v/-2.5v ta = 25c, cl = 150pf) ta = 25c, cl = 150pf) large signal transient response -2 -1.5 -1 -0.5 0 0.5 1 1.5 2 time (4 sec/div) output voltage (0.5v/div) large signal tansient respons -4 -3 -2 -1 0 1 2 3 4 time (4 s/div) output voltage (1v/div) small signal transient response -0.2 -0.15 -0.1 -0.05 0 0.05 0.1 0.15 0.2 time (4 s/div) output voltage (50mv/div) small signal transinet response -0.2 -0.15 -0.1 -0.05 0 0.05 0.1 0.15 0.2 time (4 s/div) output voltage (50mv/div)
[ak2929] rev.1.00ea 2012/4 - 8 - ? small signal overshoot vs. load capacitance ? small signal overshoot vs. load capacitance (vdd=2.7v, ta=25 c) (vdd=5v, ta=25 c) ? positive overvoltage recovery ? negative overvoltage recovery ( vdd/vss = +2.5v/-2.5v, ta = 25 c) ( vdd/vss = +2.5v/-2.5v, ta = 25 c) small signal overshoot vs. load capacitance 0 10 20 30 40 50 1.e+00 1.e+01 1.e+02 1.e+03 1.e+04 load capacitance [pf] overshoot [%] os+ os- small signal overshoot vs. load capacitance 0 10 20 30 40 50 1.e+00 1.e+01 1.e+02 1.e+03 1.e+04 load capacitance [pf] overshoot [%] os+ os- positive overvoltage recovery vo l t a g e [ v ] av = -50 rl = 10k ch1 = 1v/div ch2 = 50mv/div time ( 10 negative overvoltage recovery time (10 sec/div) av = -50 rl = 10k ch1 = 1v/div ch2 = 50mv/div voltage [v]
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