Document 1090 Isolation Transformers For Analog Devices ADuM4070 Isolated Switching Regulator • Developed to work with Analog Devices ADuM4070 Isolated switching regulator with integrated feedback • Power rating: 2 Watts • 5000 Vrms, one second isolation from primary to secondary. Core material Ferrite Terminations Tin-silver-copper over tin over nickel over phos bronze Weight 10.1 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 175 per 13″ reel Plastic tape: 44 mm wide, 0.4 mm thick, 32 mm pocket spacing, 11.9 mm pocket depth PCB washing Tested with pure water or alcohol only. For other solvents, see Doc787_PCB_Washing.pdf Pri / output voltages Part Inductance2Turns output output output number1 min (µH) ratio pri (pin 5) (pins 6 & 8) (pin 7) CR7983-CL_ 256 1 : 2 5 V +3.3 to +15 V 0 V No output CR7984-CL_ 256 1 : 3 5 V +12 to +24 V +6 to +12 V 0 V CR7985-CL_ 256 1 : 5 5 V +5 to +15 V 0 V –5 to –15 V 1. When ordering, please specify a packaging code: CR7985-CLD Packaging:D=13″ machine ready reel. EIA-481 embossed plastic tape (175 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. 11 Primary LeakageVolt-time inductance4 product5 max (µH) (V-µsec) 0.75 18.0 0.75 18.0 0.72 18.0 2. Inductance is for the primary, measured from pins 12 – 11 at 1 kHz, 0.1 Vrms. 3. DCR is for each winding of the primary and secondary. 4. Leakage inductance is for the primary windings, measured from pins 12 – 11 with all secondary windings shorted. 5. Based on VIN max, FSW min and number of primary turns 6. Electrical specifications at 25°C. Refer to Doc 362 “Soldering Surface Mount Components” before soldering. 5 Output 2 8 1 7 12 DCR max (Ohms)3 pri sec 0.190 0.350 0.170 0.450 0.170 2.00 Output Secondary 6 Output Primary windings and secondary windings to be connected in series on the PC board. Dimensions are in Analog Devices is a trademark of Analog Devices, Inc. inches mm Document 1090 Revised 05/03/13