Document 686 SMT Power Transformer For Analog Devices ADM2482E and ADM2487E RS-485 Transceivers • 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 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 –40°C to +85°C Storage temperature Component: –40°C to +85°C. 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 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 number1 Part GA3157-AL_ Pri / sec voltage 5 V to 3.3 V Inductance2 min (µH) 45.6 Leakage inductance4 max (µH) 1.14 DCR max (Ohms)3 1/2 pri 1/2 sec 0.130 0.155 1. When ordering, please specify termination and packaging codes: 4 L = 45.6 µH min DCR = 0.13 Ohms max Primary 3 2 L = 45.6 µH min DCR = 0.13 Ohms max 1 1 0.394 max 10,00 0.063 1,60 0.079 2,00 0.475 max 12,07 0.235 max 5,97 0.004 / 0,10 0.067 1,70 8 4 5 3 6 2 7 1 8 0.358 9,09 1 8 DCR = 0.155 Ohms max 7 6 Secondary DCR = 0.155 Ohms max 0.079 2,00 0.063 1,60 5 Primary windings and secondary windings to be connected in series on the PC board. inches Dimensions are in mm Specifications subject to change without notice. Please check our website for latest information. © Coilcraft, Inc. 2009 Power6 Turns ratio (W) pri : sec 7.2 1 : 0.88 Dot indicates pin 1 Coilcraft GA3157-AL CCIxxxx GA3157-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 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 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. Volt-time product5 (V-µsec) 34.4 Document 686 Recommended Land Pattern Revised 10/16/09