782482 Series www.murata-ps.com ADM2482E/ADM2487E Compatible Converter Transformers SELECTION GUIDE Nominal Input Nominal Output Isolation Voltage Turns Package Voltage Voltage Order Code Ratio Style VV VDC 782482/33VC 3.3 3.3 4000 1CT:1.33CT DIL 782482/53VC 5.0 3.3 4000 1.14CT:1CT DIL CHARACTERISTICS 782482/33VC 782482/53VC Parameter Conditions Units Min. Max. Min. Max. FEATURES 1 Primary Inductance, L 100kHz, 20mV 190 310 150 260 H P 1 RoHS compliant Leakage Inductance, L 100kHz, 250mV 8 8 H L Interwinding Capacitance, C 100kHz, 250mV 8 8 pF WW Analog Devices ADM2482E/ADM2487E 1 Primary DC Resistance, R <0.1VDC 600 600 m DC compatible 2 Volt-time Product, Et 5kHz, 5V 13 13 Vs 4.0kVDC isolation ABSOLUTE MAXIMUM RATINGS Industry-standard pinout Operating free air temperature range -40C to 85C UL 94 V-0 package materials Storage temperature range -50C to 125C Isolation voltage ( ash tested for 1 second) 4.0kVDC Low pro le Toroidal construction 3 SOLDERING INFORMATION Peak wave solder temperature 260C for 10 seconds Fully encapsulated Pin nish Matte tin Industrial temperature range Speci cations typical at T = 25C A Surface mount versions available soon 1 L , L and R measured between pins 1-3. P L DC 2 Where pulse applied across pins 1 and 2. Recommended by Analog Devices, Inc. 3 For further information, please visit www.murata-ps.com/rohs Backward compatible with TECHNICAL NOTES Sn/Pb soldering systems ISOLATION VOLTAGE REPEATED HIGH-VOLTAGE ISOLATION TESTING Hi Pot Test, Flash Tested, Withstand Voltage, Proof Volt- It is well known that repeated high-voltage isolation DESCRIPTION age, Dielectric Withstand Voltage & Isolation Test Voltage testing of a barrier component can actually degrade The 782482 series of converter transformers are are all terms that relate to the same thing, a test voltage, isolation capability, to a lesser or greater degree applied for a speci ed time, across a component designed depending on materials, construction and environ- speci cally designed for use with Analog Devices to provide electrical isolation, to verify the integrity of that ment. This series has toroidal isolation transformers, chipsets to provide isolated RS-485 and RS-422 isolation. with no additional insulation between primary and interfaces. Carefully controlled turns ratios secondary windings of enameled wire. While parts All products in this series are 100% production tested at ensure consistent performance whilst a toroidal can be expected to withstand several times the their stated isolation voltage. construction minimises EMI. stated test voltage, the isolation capability does de- A question commonly asked is, What is the continuous pend on the wire insulation. Any material, including voltage that can be applied across the part in normal opera- this enamel (typically polyurethane) is susceptible tion to eventual chemical degradation when subject to For a part holding no speci c agency approvals both input very high applied voltages thus implying that the and output should normally be maintained within SELV limits number of tests should be strictly limited. We there- i.e. less than 42.4V peak, or 60VDC. The isolation test volt- fore strongly advise against repeated high voltage age represents a measure of immunity to transient voltages isolation testing, but if it is absolutely required, that and the part should never be used as an element of a safety the voltage be reduced by 20% from speci ed test isolation system. The part could be expected to function cor- voltage. rectly with several hundred volts offset applied continuously This consideration equally applies to agency recog- across the isolation barrier but then the circuitry on both nized parts rated for better than functional isolation sides of the barrier must be regarded as operating at an where the wire enamel insulation is always supple- unsafe voltage and further isolation/insulation systems must mented by a further insulation system of physical form a barrier between these circuits and any user-acces- spacing or barriers. sible circuitry according to safety standard requirements. For full details go to www.murata-ps.com/rohs www.murata-ps.com/support KMP 782482C A02 Page 1 of 2782482 Series ADM2482E/ADM2487E Compatible Converter Transformers PACKAGE SPECIFICATIONS MECHANICAL DIMENSIONS RECOMMENDED FOOTPRINT DETAILS 9.77 (0.385) Max. TOP VIEW 2.54 (0.10) Primary Secondary 1 6 2.54 (0.10) 9.14 2 5 (0.360) Max. 782482/33VC 34 XYYWW +0.15 (0.006) 1.20 (0.05) -0.00 (0.000) 6.35 (0.25) 3.440.50 (0.1350.02) 0.30(0.012) 0.6 (0.024) 0.20(0.008) 10.160.40 2.54 (0.400.016) (0.1) Unless otherwise stated all dimensions in mm (inches) 0.25 (0.01). Unless otherwise stated all dimensions in mm (inches) 0.25 (0.01). All pins on a 2.54 (0.1) pitch and within 0.25 (0.01) of true position. Package Weight 1.1g TYP. All pins on a 2.54(0.1) pitch and within 0.25(0.01) of true position. TUBE OUTLINE DIMENSIONS 10.65 - 11.65 (0.419 - 0.459) Unless otherwise stated all dimensions in mm (inches) 4.00 (0.16) 0.25 (0.01). Tube length: 5002 (19.70.08) 0.600.15 12.95 Tube quantity: 50 (0.0240.006) (0.51) Tube material: Antistatic coated clear PVC. 5.20 (0.21) 3.80 (0.15) 15.70 (0.62) Murata Power Solutions, Inc. Murata Power Solutions, Inc. makes no representation that the use of its products in the circuits described herein, or the use of other 11 Cabot Boulevard, Mans eld, MA 02048-1151 U.S.A. technical information contained herein, will not infringe upon existing or future patent rights. The descriptions contained herein do not imply the granting of licenses to make, use, or sell equipment constructed in accordance therewith. Speci cations are subject to change without ISO 9001 and 14001 REGISTERED notice. 2011 Murata Power Solutions, Inc. www.murata-ps.com/support KMP 782482C A02 Page 2 of 2