( -.. analog w devices low cost 4 y2 digit dpms with led displays ad2024/ad2027 , features "second generation" mos.lsi design large 0.43" (11mm) led displays 4% digit resolution - 20,000 counts full scale limited differential input either line powered (ad2024) or logic powered (ad2027) industry standard case designs applica tions high resolution/high accuracy r_out for: test equipment process control instrumentation analytical and scientific instruments general description the ad2024 and ad2027 are low cost 41,1 digit dpms with large led displays. both units offer the same features and iden- tical performance, but the ad2024 is ac line powered and the ad2027 is +5v dc powered. the benefits of second generation design the ad2024 and ad2027 are designed around.mos-lsi (metal oxide semiconductor, large scale integration) inte- grated circuits which greatly reduce the number of components and interconnections required to provide the p'erformance and features expected in a high resolution 41,1 digit dpm. this "second generation" design, therefore, offers greatly increased reliability and significantly lower cost at little com- promise in performance. the large 0.43 inch (11mm) led dis- plays offer the brightness and readability previously available only with gas discharge displays with the added advantage of an all solid state component. high resolution and versatile features these dpms measure dc input voltages over a full scale range of :t1.9999v with an accuracy of :to.005% teading j:().oo5% of full scale :t 1 digit. using the "limited differential" input first used by analog devices on the ad2010, the ad2024 and ad2027 prevent ground loop problems and provide 50db of common mode rejection at common mode voltages up to :t200mv. normal mode rejection is 25db at 50-60hz. bcd data outputs are provided in a bit parallel, character serial format compatible with cmos logic systems. when applica- tions require parallel bcd data, such as interfaces to printers, compara~ors or slave displays, parallel bcd output options are available that are compatible to standard ttl logic systems. for detailed inform.don, contact factory. external power supply outputs at +5v and -25v (-25v only on the ad2027) are made available for powering external cir- cuitry. in addition, control inputs for conversion "hold", display blanking and decimal point selection are provided. industry standard case designs although both the ad2024 and ad2027 have identical elec- trical designs, they are packaged in the case sizes that have become industry standards for ac line powered and +5v dc logic powered dpms respectively. the ad2024 fits the 3.924" x 1.682" (99.67 x 42.74mm) panel cutout common to most ac line powered dpms, and the ad2027 fits the 3.175" x 1.810" (80.65 x 45.97mm) panel cutout of the analog devices logic power case design, now used by several other manufac- turers of logic powered dpms. thus, interchangeability is assured, allowing mechanical second sourcing for both these dpms. designed and built for reliabiuty even beyond the reliability advantages of the lsi-ic design and led displays, the ad2024 and ad2027 have had extreme care taken in their design and manufacture to insure reliability. manufacturing processes are monitored by continual quality assurance inspections to insure proper workmanship and test- ing. automatic test equipment is used to test each dpm thor- oughly and without error. and each ad2024 and ad2027, like every analog devices dpm, receives a full one week failure- free burn-in before shipment. . digital panel instruments vol. ii, '~25 obsolete
specifications display outputs . seven segment led display, 0.43" (llmm) high, for four data digits, 100% overrange and polarity indication. . overload indication by blanking all digits, polarity sign remains valid. . decimal points (4) selectable at input. . display blanking analog input . confaguration: bipolar, limited differential . full scale range: :1:1.9999v (:1:19.999v, "v" option) . automatic polarity . input impedance: l00mo (lmo, "v" option) . bias current:. 3ona (3na, '~v" option) . overvoltaje protection: 120v rms sustained accuracy . . to,oos% reading :1:0.oos% futl scale :1:1 digit i . resolution: 1oollv , . temperature range2: 0 to +sooc operating. -20 to +8soc storage. (ad2024/b: () to +4soc operatilj) . tem~rure coefficient: gain: :l:30ppm/ c. zero offset: :l:1o,.tvfc (:l:4oppmfc & :!:loo$lvfc, "v.. option) '. warmup time: one minute to rated accuracy . sctding time to rated accuracy: 4soms normal mode rejection . 2sdb at so-60hz common mode rejection . sodb, de to 1khz, :1:200mv common mode voltage . ad2024 (floated on power supply transformer if data out- puts and control signals are not used) - llodb at 120v rms common mode voltage, 1ko imbalance at input. conversion time . 18oms for full scale reading . 2l0ms for overload conversion conversion rate . s conversions per second digital interface signals . inputs display blank - (dtlittl compatible, 4 ttl loads). logic "0" or grounding blanks display, including polarity sign, but not decimal points. the display is valid immed- iately upon removal of the blanking signal. hold - (dtllttl compatible, 2 til loads). logic "0" or grounding causes the dpm to hold and display the last conversion. upon removal of the hold, the dpm resumes conversions. decimal points - (not ttl compatible). logic "0" or grounding turns on appropriate decimal point. external circuitry must sink 6oma when a decimal point is illuminated. . outputs dtlltil compatible3 - status. logic "i" indicates con- version in process. all digital outputs are valid when status is at logic "0". 5 ttl loads. - polarity. logic "i" indi- cates positive polarity, latched. 5 til loads. cmos and lp schottky compatible - overload, logic "i" indicates overload (~20,ooo), latched. - bcd outputs. 4\o(z bcd digits, character serial, bit parallel, 1 lp schottky load. diiital strobe outputs - (cmos or lp schottky compatible) logic "i" on any of these line indicates the output data is valid for that digit, 1 lp schottky load. parallel bcd output (option "b"). - 4\o(z bcd digits, positive true, latched. drives 5 til loads. - data ready. logic "i" indicates output data is valid. drives 2 til loads. vol ii, 76-26 digital panel instruments external power supply outputs . ad2024: +5v at 25ma, -25v at 5ma . ad2027: -25v at 5ma power supply inputs . ad2024: ac line, 50-60hz, 4.2w . ad2027: +5v dc, :1:5% at 85oma calibration adjustments . gain . zero . recommended recalibration interval: 6 months size . ad2024: 3.92"w x 1.67"h x 4,48"d (100 x 42 x 114mm) "panel cutout: 3.930" x 1.682" (99.8 x 42.7mm) . ad2027: 3"w x 1.8"h x 4"d (76 x 46 x 102mm) panel cutout: 3.175" x 1.810" (80.65 x 45.97mm) weight . ad2024: 14 ounces (395 grams) . ad2027: 10 ounces (280 grams) options - ordering guide . ad2024 ' ac power inputs ad2024 - 117v ac } ad2024/e - 220v ac ad2024/f - 100v ac :tl0% ad2024/h - 240v ac input ran~e options ad2024 - :!:1.9999v full scale ad2024/v - :t19.999v full scale data output options (available with any power input options) ad2024 - character serial data outputs ad2024/b - parallel bcd option displav lens options4 lens 7 - red with adi logo lens 8 - red without adilogo connector - 36 pin, 0.156" spacing, card edge connector, viking 2vk18d/1-2 or equivalent. - optional: order ac2610. ad2024/b option also requires a 30 pin, 0.156" spacing, card edge connector, viking 2vk15d/1-2 or equivalent. - optional: order ac1501. . ad2027 input ran~e options ad2027 - :!:1.9999v full scale ad2027/v - :!:19.999v full scale data output options ad2027 - character serial data outputs ad2027/b - parallel bcd option display lens options4 lens 5 - red with ad! logo lens 6 - red without adilogo connector - ac1501 (see above) or equivalent. ad2027/b option r.equires two each. notes 1 guaranteed at +2soc and nominal power supply voltage. 2 guaranteed. . for cmos compatibility, 3.3k puuup resistors to the +sv output of the dpm are required. . if no lens is specified, lens 5 or 7 is supplied as appropriate. specifications subject to change without notice. j obsolete
applying the ad2024 and ad2027 analog high a v'n, analog grouno ad202. digital ground ac high ie linec"" ie r8",m figure 1. ad2024 wiring interconnections analog high v,n analog ground a 1000 j digital ground power ground 8 +6v de power supply ad2027 +6v de power input 9.k figure 2. ad2027 wiring interconnections interfacinll data outputs the standard data outputs are in a bit parallel character serial format compatible to cmos and lp schottky logic systems. the bcd outputs are multiplexed, and a digit output is pro- vided for each of the five digits of output. thus, the four bcd lines on the output at a: given time are valid for the digit whose digit line is currently high. the bit parallel character serial data is valid when the dpm status line is low for a period of soms between each conversion cycle. the overload line is latched ou tpu t which is at logic" 1", when- ever the input exceeds the full 20,000 count range. optional parallel bcd outputs ("b" option) are available on a separate card which is internally connected to the dpm. the output data then is presented in a full parallel format and is latched. the parallel data is valid whenever the data ready output is high. pin connections for the "b" option are shown in the intercon- nection tables and a full timing diagram is shown in figure 3. integration cycle i i i i i ~ :. .:. .' signal reference loll recover. i integrate integrate i idle time: ,t6oms1 (100mt maxi i (150"", mini i status ~ i r i i i i i , digit.serial~ ~//a data valid i i i : tl : --;!-note1 : ii para~i~~ddata wo'?$/////////////////////// / ~////////// parallel.data ready flag (note 2) note 1. approx. sm, required to load parallel-out registers. note 2. b option. figure 3. ad2024/ad2027 timing diagram ad2024 - signal and pin connections note 1: bcd multiplexer dock pulse ...8iialll8 for remote pi_ment of bcd option. ad2027 - signal and pin connections ii notes: 11 o-ioed output is on m8in dpm connector. 21 pins mft8d "in" - m8d8 iy8il8ble for -- p'-'nent of bcd option ~ end - not norm8lly iiiici since all conmctiol1l- in_i. ad2024/ad2027 bcd options - signal and pin connections digital panel instruments vol. ii, 76-27 ~-- pin function 1 an8io1i ground 2 10' digit -key 3 bcd 2 .. 10j digit 5 bcds s mux step 1 7 +5v de (oud s nc 9 8c high 10 nc 11 8c return 12 nc 13 digit81 ground ,.. nc 15 poiiirity 16 d.., bi8nk 17 dp1xxx.x 1s <>-toed pin function a analoahiah 8 1oe digit (lsd! -key c 10' digit d bcd" e bcd 1 f 10" digit (msd) h -25v de (out) j nc k 8c high l nc m 8c r81um n nc p digit81 ground r status s hold t dp1.xxxx u dp1x.xxx v dp1xx.xx pin function t an8ioghigh 2 1oe digit (lsd) 3 bcds .. bcd 2 5 10" digit (msd) s 103 digit 7 nc s poww ground 9 -i5v (in) 10 nc -key 11 display 8i8nk 12 hold 13 o-ioad ,.. dp1.xxxx 15 dp1xx.xx pin function a an8io1i ground b mux s18p 1 c bcd 1 d bcd" e 10' digit f 103 digit h -25vdc (out) j digitiil ground k -i5v (in) l nc -key m nc n poi_ity p s- r dptx.xxx s dp1xxx.x pin function 1 +5v de (in) 2 bcd 1 (in) 1-- key 3 bcd .. (in) .. bcd 2000 5 bcd40 6 bcd 800 7 bcd 100 s bcd 10,000 9 bcd20 10 'bcds 11 bcdt 12 bcd 400 13 08t8 r88dy ,.. pol8rity (in) 15 poi8rity (out) pin function a nc (do not usel b bcd s (in) - key c bcd 2 (in) d bcd" e bcdbo f bcd 8000 h bcd 1000 j bcd 200 k bcd 2 l bcd 10 m bcd 4000 n 10" digit (in) p status (in) r mux step (lnl s digital ground obsolete
1>.10 1130) ."...n - .... sj:)ia30" 001yny" 00000 00000 00000 noi.wo suonio . am 08-01 ::?y,\ otpz 0 2m 08-01 ::?y,\ ool 0 am 08-01 ::?y,\ ozz 0 am 08.01 ::?y,\ lll 0 .1jwni a 1cicins iiijn\oci 4.4, 11141 mounting block m " i iioiiv 0000000 d.2. (8.731 ~ -ct 4.2161107.1) input offset aojust , lens ..,...n 1t8 lay.. 53:>11\30 pi do1vnv" 4.- (1041 max noi.lclo suonio . y.1yo 0:>8 0 8 iioiido l~d~uv snap-on lens a key between pin2813 v p1, 38 pin connector panel cutout: 3.930 x 1.682 (99.82 x 42.72) figure 4. atj2024 mechanical outline (dimensions shown in inches and (mm)) key between pin 2813 p1, 30 pin connector panel cutout: 3.175 x 1.180 (80.65 x 45.97) r r 2.022 (61.4) max l 4.830 1117.8) max figure 5. ad2027 mechanical outline . (dimensions shown in inches and (mm)) vol. 1/, 76-28 digital panel instruments ..j -- obsolete
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