? coilcraft, inc. 2009 specifications subject to change without notice. please check our website for latest information. smt power transformer document 686 document 686 revised 10/16/09 for analog devices adm2482e and adm2487e rs-485 transceivers core material ferrite terminations rohs compliant tin-silver over tin over nickel over phos bronze. other terminations available at additional cost. weight 1.0 g ambient temperature ?40c to +85c storage temperature component: ?40c to +85c. packaging: ?40c to +80c resistance to soldering heat max three 40 second reflows at +260c, parts cooled to room temperature between cycles moisture sensitivity level (msl) 1 (unlimited floor life at <30c / 85% relative humidity) failures in time (fit) / mean time between failures (mtbf) 38 per billion hours / 26,315,789 hours, calculated per telcordia sr-332 packaging 600 per 13 reel; plastic tape: 24 mm wide, 0.37 mm thick, 16 mm pocket spacing, 6.1 mm pocket depth pcb washing only pure water or alcohol recommended leakage vo lt-time pri / sec inductance 2 dcr max (ohms) 3 inductance 4 product 5 power 6 turns ratio part number 1 voltage min (h) 1/2 pri 1/2 sec max (h) (v-sec) (w) pri : sec GA3157-AL_ 5 v to 3.3 v 45.6 0.130 0.155 1.14 34.4 7.2 1 : 0.88 1. when ordering, please specify termination and packaging codes: ga3157-a ld termination: l = rohs compliant tin-silver over tin over nickel over phos bronze. special order: t = rohs tin-silver-copper (95.5/4/0.5) or s = non-rohs tin-lead (63/37). packaging: d =13 machine ready reel. eia-481 embossed plastic tape (600 per full reel). b = less than full reel. in tape, but not machine ready. to have a leader and trailer added ($25 charge), use code letter d instead. 2. inductance is tested between pins 4 and 3 at 500 khz, 0.5 vrms, 0 adc. 3. dcr is for each half of the primary and secondary. 4. leakage inductance is for the primary with both windings connected in series and with the secondary windings shorted. 5. based on bsat of the core at 25c and number of turns on winding 4-3. 6. calculated output power based on 150 khz operating frequency. power varies depending on application. 7. electrical specifications at 25c. refer to doc 362 ?soldering surface mount components? before soldering. ? designed specifically for use with analog devices adm2482e and adm2487e high speed, isolated rs-485 transceivers with integrated transformer driver ? center tapped primary and secondary ? 2500 vrms primary to secondary isolation 8 8 7 6 5 1 1 2 3 4 1 coilcraft GA3157-AL ccixxxx recommended land pattern 0.394 10,00 0.475 12,07 0.235 5,97 0.358 9,09 0.067 1,70 0.079 2,00 0.063 1,60 0.063 1,60 0.079 2,00 max dot indicates pin 1 max max 0.004 / 0,10 8 5 4 2 7 3 primary l = 45.6 h min dcr = 0.13 ohms max l = 45.6 h min dcr = 0.13 ohms max secondary primary windings and secondary windings to be connected in series on the pc board. 1 6 dcr = 0.155 ohms max dcr = 0.155 ohms max dimensions are in inches mm
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