analog w devices precision, triple output transducer power supply features resistor programmable voltage or current output voltage: +1v dc to +15v dc @ 125ma max current: 100pa to 10ma (vcompl = +10v) dual fixed output: :t15v dc @ :t65ma max excellent regulation: line :to.01% max; load :to.02% max low drift: 0.006%fc max (2b35k) no derating over -25c to +71c operating range applications measurement and control instruments and systems excitation source for: strain gages, pressure transducers, load cells, torque transducers, rtd's general description the 2b3 5 is a triple output modular power supply designed to provide regulated excitation to a wide variety of transducers as well as :t15v power for amplifiers and other analog circuits of an instrumentation system. the single-resistor programmable transducer excitation output may be operated in two modes: constant voltage, providing a + 1 v to + 15v output or a con- stant current, adjustable from 100pa to 10ma. the programmable output in the voltage mode features cur- rent rating of 0 to 125ma, suitable to excite four 3 50n trans- ducers at 10v. current limiting protects the output against ac- cidental overload and remote sensing corrects for the trans- ducer cable resistance variations. in the constant current mode, externally set 100pa to 10ma output offers a 0 to +lov com- pliance voltage range. the :t15v outputs feature 0.5% tracking accuracy and current rating of 0 to :t65ma max. two accuracy selections are available offering guaranteed low temperature coefficient; 2b35k: 0.006%/c max and 2b35j: o.05%/c max. line and load regulation are also guaranteed; 2b35k: 0.01% and 0.02%, and 2b35j: 0.08% and 0.1%, max, respectively. applications the 2b35 is designed for ac powered signal conditioning in- strumentation applications used for data acquisition, control, indication or recording. this compact module may be applied as a power source for the model 2b30 strain gage transdl,lcer/ rtd signal conditioner in a high accuracy transducer interface application. some typical applications involve strain gages for stress/strain measurements, pressure transducers, load cells, torque transducers and rtd's. information furnished by analog devices is believed to be accurate and reliable. however, no responsibility is assumed by analog devices for its use; nor for any infringements of patents or other rights of third parties which may result from its use. no license is granted by implica- tion or otherwise under any patent or patent rights of analog devices. fine gain bridge transducer signal conditioning operation figure 1 illustrates operation of the 2b3 5k providing an ad- justable voltage output and dual15v dc outputs. the resistor programmable output (+vout) is set between + 1 v to + 15v by the rtrim. rtrim may be determined by using either the table shown in figure 1 or the graph shown in figure 2. for example, to provide an adjustable range from + 1 v to +6v, rtrim should be a 5kn pot. the remote sensing inputs (pins 5 and 8) are connected at the transducer (load) to the voltage output (sense high to +vout and sense low to common). 3 aef out f- aef in (high) 4 v ac 2 pwa common atrim model 2b35k ~ ,1.,5v! ~ sense high '25ppm!"c or better rload' ~ rload' sense low com. figure 1. model 2835k connection diagram for dual15v de and adjustable + 1 v to + 15v output for optional input voltage ranges, see note 1, page 2. p.o. box 280; norwood, massachusetts 02062 u.s.a. tel: 617/329-4700 twx: 710/394-6577 telex: 924491 cables: analog norwoodmass ,vout atrim' iv) '3% ikm 1 0.34 3 1.15 5 2.26 7.5 4.42 10 8.06 12 14.0 15 54.9 obsolete
specifica 110ns (typical @ +2soc and l1sv ac 60hz unless otherwise noted) 2835j 283sk outline dimensions model input input voltage rangel 10svac to 12sv ac input frequency range sohz to 400hz * adjust able output'~~ ~-~ ~-~-'"""--- voltage mode output voltage range output voltage stability 'is. temperature - % vout/c max 'is. time - % vout/month output current (-zsoc to +7ioc)2 output impedance - @ dc, max noise and ripple (dc to imhz) - mv p-p max - mv rms max regulation line (full range) - % vout max load (no load to full load) - % vout max remote sensing impedance short circuit current limit3 (-25c to +7ioc) current mode output current range output current stability 'is. temperature - % lout/c max 'is. time - % lout/month compliance voltage range noise and ripple (dc to imhz) -p.a p-p line regulation (full range) - % lout max dual fixed outputs output voltage voltage error - mv max accuracy tracking (-isv ref to +15v) - % max stability 'is. temperature - %/c max . output current4 output impedance - @ dc, max noise and ripple (dc to imhz) - mv p-p - mv rids regulation line (full range) - % max load (no load to full load) - % max short circuit current limit3 (-2soc to +71 c) input to output isolation breakdown voltage - continuous, ac or dc isolation +iv to +15v dc :to.05 :to.01 0 to 125ma max o.lil i 0.25 :to.os :to. i 30kil 200ma 100p.a to 10ma :to.05 :to.ol 0 to +lov 0.1 :to.os :t15v dc -0,+300 :to. 5 :to.02 0 to :t6sma max o.lil 1 0.25 :to.os :to. 1 :tlsoma :t500v pk max somil :to.006 * * :to.ol :to.02 :to.006 :to.ol :to.006 :to.ol :to.02 temperature range operating, rated performance mechanical case dimensions - inches - grams socket -25c to +71c -25c to +s5c 2.5 x 3.5 x 1.25 550 ac12l2 * notes .specifications same as model 2b35j. 1 optional input voltage ranges: "e" option; 205-240v ac, 50 to 400hz "f" option; 90-110v ac, 50 to 400hz "h" option; 220-260v ac, 50 to 400hz order option desired as a suffix to model number. . maximum output current available over the entire output voltage and temperature range without derating. . output protected for continuous short circuit over the temperature range.. .unbalanced load operation is permissible for any combination of +10 and ~io i which does not exceed a total of 130ma. specifications subject to change without notice. 3.5 l8a.al max j 1 1.25131.751 max 1 ~ ~ i" n i "'0 0> 0> ts model 2835 l 1 2.5163.51 max 1 aottom view -! !-0.1(2.5igri0 mating socket: ac1212 15 :> 12 ~ 1 ... ~ 0 10 atrim - ohms figure 2. voltage output vs. rtrim adjustable current output with dual 15v de outputs pin connections to provide dual 15v dc and a constant current output are shown in figure 3. the current output is adjusted from looila to loma via rtrim. the value of programming resistor rtrim may be calculated from the relationship: rtrim = 2.46/iout where rtrim is in h2 and lout in ma. .:a; ij) ::i z 0 w i- z a: q.. atrim r::;:;'1 i i +15v i ~ pwr common figure 3. model 2835 connection diagram to provide dual15v dc and adjustable 1001la to 10ma current output -- obsolete
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