analog devices fax-on-dehand hotline - page 36 -.. analog w devices i features third generation 12l lbi design logic powered (+5 v dc) large 0.56'" red orange leos balanced differentiallnput/floatlng 1000 v, cmv terminal block interface (ac version) high reliability: >250,000 hour mtbf small size and weight low cost general description the ad2026 is specifically designed to provide a digital alterna- tive to analog panel meters. the ad2026 logic powered (+ 5 v dc). most of the analog digital circuitry is implemented on a single i2l lsi chip, the ad2020. only 13 additional compo- nents are required to complete the ad2026. the entire assem- bly is mounted on a single 3" x i 5/8" pcb. the ad2026 offers as a standard feature, 0.56" high led displays. brightness is enhanced due to the red orange lens. in addition to the red orange lens, the ad2026 is also available with a dark red lens for applications where maximum brightness is not required and minimum backlighting is desired. a unique patented. case design utilizes molded-in fmgers, both to capture the pcb in the case and to provide snap-in mounting of the dpm in a standard panel cutout. no mounting hardware of any kind is used.. the ad2026 occupies less than 1" of space behind the panel. excellent performance the ad2026 offers the instrument designer digital accuracy, resolution and use of readout while occupying less space than its analog counterpart. other features of analog meters such as reli- ability and instantaneous response are retained in the ad2026. the ad2026 measures and displays inputs from -99 mv to + 999 m v, with an accuracy of 0.1 % of reading ::t i digit. zero shift is less than one bit over the full operating temperature range, resulting in the same performance as a dpm with auto zero. the balanced differential input of the ad2026 rejects common-mode voltages up to 200 mv, enough to eliminate most ground loop problems. wiring connections for balanced differential operation with the ap2026, connect input as shown in figure 1. the common-mode loop must pro- vide a return path for the bias currents internal to the ad2026. the resistance of this path must be less than 100 ko and total common-mode voltages must dot exceed 200 my. .covered by patent niiidbcn: 4,091.698. 29.992; 3,872,466; and 3,887,863. rev. a 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 u58. no iic8nse is granted by implil:ation or otherwise under any patent or patent rights of analog devices. low cost, 3 digit logic powered dpm ad2026* i for applications where attenuation is required scaling resistors can be connected between pins 6 and 7 and between pins f and h. pin 5 must be used as the high analog input when scaling resistors are used and pin 4 when they are not. pin e is the analog low input. 14) 11iw ~: :"",} ~al ~i -u f exter~~ (fi scaling ... l-...... resistprs ie) 1(hi lo hi ici 111 i: ..... it.z .... ~ ecc.m... iloo ...v rc<10d1d11 figure 1. pin connections dc version one tec:hnology way. p.o. box 9106, norwood, ma 02062-9106. u.s.a. tel: 617/329-4700 fax: 617/326-8703 twx: 710/394.6577 telex: 924491 cable: analog norwoodmass pin function pin function 1 +5 v power a decimal point xx.x 2 +s v display power b decimal point xxx. 3 decimal point xxx c power ground 4 input (when scaling) d hold resistors not used) e analog ground 5* input (when scaling f* shunt arm of scaling resistors are used) resistor divider 6* series ann of scaling h* shunt arm of scaling resistor divider resistor divider 7* series arm of scaling resistor divider *not norxmdly used. allows convenient mounting of scaling resistors. obsolete
analog devices fax-on-dehand hotline - page 37 ad2026 - speci fi cations (typical at +25c and nominal supply voltage unless otherwise noted) display output . light emitting diode, planar seven segment display readouts, 0.56" (14.6 mm) high (orange) . overload indication: eee . negative indication: -xx . negative overload indication: - - - . decimal points: three (3) selectable at input connector analog input . confjguration: balanced differential input . full-scale range: -99 mv to +999 mv . automatic polarity . input impedance: 100 mil; 100 kfl (10 v option) . overvoltage production: :t 15 v dc, sustained accuracy . :to.1 % :t i digiti . resolution: i mv or 10 mv . temperature range;!: -10"c to +60"c operating: -25c to +sooc storage . temperature coefficient: gain: 50 ppmf'c zero: 10 ~vf'c (essentially auto zero) . warm-up time to rated accuracy: instantaneous . settling time to rated accuracy: 0.3 see for full input voltage swing common -mode rejection (1 kfl source imbalance, dc to i khz) . 50 db, :t200 mv common-mode voltage . 116 db (96 db on 10 v range); 1000 v rids max cmv (ac version) normal-mode rejection . 30 db at 50 hz-60 hz (ac version) conversion rate . 4 conversions per second . hold and read on command control inputs display blankingldisplay power input: the display of the ad2026 can be blanked by removal of power to the display power input, with no effect on conversion circuitry. if exter- nallogic switching is used, the display requires 110 ma peak (85 ma average) when illuminated. hold: when the hold input is at logic "0", grounded or open circuit, the ad2026 win convert at 4 conversions per second. if a voltage of 0.6 v to 2.4 v is applied to this input, the dpm will stop converting and hold the last reading. a 12 kf! resistor in s~ries with this input to + 5 v will provide the proper voltage input. decimal point . to illuminate decimal points ground appropriate pin (a, b or 3) power input logic power3 . converter: +5 v :t5%, 0.2 watts typ; 0.33 watts max . display: + 5 v :t40%, 0.45 watts typ; 0.75 watts max calibration adjustments . gain . zero . recommended recalibration interval: six months size . 3.43" w " 2.0" h x 0.s5" d (87" x 52 x 22 nun) . 0.88" (22 mm) overall depth to rear of connector . panel cutout required: 3.175 :to.o15"" 1.810 :i:o.ol5" (80.65 :to.38 x 45.97 :to.38 mm) weight . 1.8 ounces (53 grams) (dc version) connections a lo-pin t&b/ansley 6o9-l000m with two feet of 10 con- ductor ribbon cable is available. order ac261s. conductor to pin a is color coded. sequence of ribbon connections is a, i, b. 2. c. 3, etc. ordering guide ad2026 lens4 red lens red orange lens ~ }- enter ~ notes 'guaranteed at +25"c and nominal supply voltage. 1guaranteed. 'when the same power supply is used to power both display and <:anyoner, +5 v, :::5%,0.65 watts typical, 0.9 wans max is required. 'no charge options. specifications subjed to change without notice. outline dimensions dimensions shown in inches and (mm). 3.17(00"'" -1 "'3(07.1>1 [j) ...... ~ 0.. n:>7) d~~,~~ model ad2026 mad<" uu. 0 o. ,.. tv =x ~' i-- 1 j " 'ull , plea. u4 0"" 0.60 134"'" 11"'" 112.701 hotel, ,. all difiienslon' are in inches and i-i. z. panil thie too.'" "'1 10 1:1-2). -2- rev. a obsolete
|
