Document 550 SMT Power Transformers For Analog Devices Isolated RS-485 Transceivers • Developed for Analog Devices ADM2482E, ADM2485 and ADM2487E RS-485 Transceivers for stepping up 5 V or 3.3 V to 6 V. • Center tapped primary and secondary windings • 2500 Vrms, one minute interwinding isolation. Core material Ferrite Terminations RoHS tin-silver over tin over nickel over phos bronze. Other terminations available at additional cost. Weight 0.94 – 1.0 g Ambient temperature –40°C to +125°C Storage temperature Component: –40°C to +125°C. Tape and reel packaging: –40°C to +80°C Resistance to soldering heat Max three 40 second reflows at +260°C, parts cooled to room temperature between cycles Moisture Sensitivity Level (MSL) 1 (unlimited floor life at <30°C / 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 600/13″ reel Plastic tape: 24 mm wide, 0.37 mm thick, 16 mm pocket spacing, 6.1 mm pocket depth PCB washing Tested with pure water or alcohol only. For other solvents, see Doc787_PCB_Washing.pdf LeakageVolt-time Inductance2 DCR max (Ohms)3 inductance4 product5 Power6 Turns ratio Pri / sec Part number1 voltage min (µH) pri sec max (µH) (V-µsec) (W) pri : sec DA2303-AL_ 5 V to 6 V 45.6 0.130 0.260 1.0 34.4 7.2 1 : 1.5 DA2304-AL_ 3.3 V to 6 V 17.8 0.086 0.232 0.43 21.5 7.2 1 : 2.2 1. When ordering, please specify termination and packaging codes: 0.394 max 10,00 4 4 8 3 2 7 1 5 Internal code DA230x-AL 1 XXXXY DA2303-ALD 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 per winding. 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 25°C 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 25°C. Refer to Doc 362 “Soldering Surface Mount Components” before soldering. Dot indicates pin 1 Pri 8 5 6 Sec Primary windings and secondary windings to be connected in series on the PC board. 0.475 max 12,07 Parts manufactured prior to November 2011 may be marked differently. 0.235 max 5,97 0.004 / 0,10 0.319 ±0.004 8,1 ±0,1 0.028 0,70 0.358 9,10 4 5 8 1 0.079 2,00 Dimensions are in 0.079 2,00 0.063 1,60 0.067 1,70 1 Recommended Land Pattern inches mm US +1-847-639-6400 [email protected] UK +44-1236-730595 [email protected] Taiwan +886-2-2264 3646 [email protected] China +86-21-6218 8074 [email protected] Singapore + 65-6484 8412 [email protected] Document 550 Revised 11/29/11 © Coilcraft Inc. 2014 This product may not be used in medical or high risk applications without prior Coilcraft approval. Specification subject to change without notice. Please check web site for latest information.