782482 Series www.murata-ps.com ADM2482E/ADM2487E Compatible Converter Transformers SELECTION GUIDE Order Code Nominal Input Voltage V Nominal Output Voltage V 782482/33VC 3.3 3.3 4000 1CT:1.33CT DIL 782482/53VC 5.0 3.3 4000 1.14CT:1CT DIL Isolation Voltage Turns Ratio VDC Package Style CHARACTERISTICS Parameter FEATURES Conditions 1 P 1 L RoHS compliant Analog Devices ADM2482E/ADM2487E compatible Primary Inductance, L Leakage Inductance, L Interwinding Capacitance, CWW Primary DC Resistance, RDC1 Volt-time Product, Et2 100kHz, 20mV 100kHz, 250mV 100kHz, 250mV <0.1VDC 5kHz, 5V 782482/33VC 782482/53VC Min. 190 Min. 150 13 Max. 310 8 8 600 Max. 260 8 8 600 13 Units μH μH pF mΩ Vμs 4.0kVDC isolation Industry-standard pinout ABSOLUTE MAXIMUM RATINGS Low profile Operating free air temperature range Storage temperature range Isolation voltage (flash tested for 1 second) Toroidal construction SOLDERING INFORMATION3 Fully encapsulated Peak wave solder temperature 260˚C for 10 seconds Pin finish Matte tin UL 94 V-0 package materials Industrial temperature range Surface mount versions available soon Recommended by Analog Devices, Inc. Backward compatible with Sn/Pb soldering systems DESCRIPTION The 782482 series of converter transformers are specifically designed for use with Analog Devices chipsets to provide isolated RS-485 and RS-422 interfaces. Carefully controlled turns ratios ensure consistent performance whilst a toroidal construction minimises EMI. Specifications typical at TA = 25°C 1 LP, LL and RDC measured between pins 1-3. 2 Where pulse applied across pins 1 and 2. 3 For further information, please visit www.murata-ps.com/rohs TECHNICAL NOTES ISOLATION VOLTAGE REPEATED HIGH-VOLTAGE ISOLATION TESTING ‘Hi Pot Test’, ‘Flash Tested’, ‘Withstand Voltage’, ‘Proof Voltage’, ‘Dielectric Withstand Voltage’ & ‘Isolation Test Voltage’ are all terms that relate to the same thing, a test voltage, applied for a specified time, across a component designed to provide electrical isolation, to verify the integrity of that isolation. It is well known that repeated high-voltage isolation testing of a barrier component can actually degrade isolation capability, to a lesser or greater degree depending on materials, construction and environment. This series has toroidal isolation transformers, with no additional insulation between primary and secondary windings of enameled wire. While parts can be expected to withstand several times the stated test voltage, the isolation capability does depend on the wire insulation. Any material, including this enamel (typically polyurethane) is susceptible to eventual chemical degradation when subject to very high applied voltages thus implying that the number of tests should be strictly limited. We therefore strongly advise against repeated high voltage isolation testing, but if it is absolutely required, that the voltage be reduced by 20% from specified test voltage. All products in this series are 100% production tested at their stated isolation voltage. A question commonly asked is, “What is the continuous voltage that can be applied across the part in normal operation?” -40°C to 85°C -50°C to 125°C 4.0kVDC For a part holding no specific agency approvals both input and output should normally be maintained within SELV limits i.e. less than 42.4V peak, or 60VDC. The isolation test voltage represents a measure of immunity to transient voltages and the part should never be used as an element of a safety isolation system. The part could be expected to function correctly with several hundred volts offset applied continuously across the isolation barrier; but then the circuitry on both sides of the barrier must be regarded as operating at an unsafe voltage and further isolation/insulation systems must form a barrier between these circuits and any user-accessible circuitry according to safety standard requirements. This consideration equally applies to agency recognized parts rated for better than functional isolation where the wire enamel insulation is always supplemented by a further insulation system of physical spacing or barriers. For full details go to www.murata-ps.com/rohs www.murata-ps.com/support KMP_782482C_A02 Page 1 of 2 782482 Series ADM2482E/ADM2487E Compatible Converter Transformers PACKAGE SPECIFICATIONS MECHANICAL DIMENSIONS RECOMMENDED FOOTPRINT DETAILS 9.77 (0.385) Max. TOP VIEW Primary 9.14 (0.360) Max. 2.54 (0.10) Secondary 1 6 2 5 3 4 2.54 (0.10) 782482/33VC XYYWW Ø1.20 (0.05) +0.15 (0.006) -0.00 (0.000) 6.35 (0.25) 3.44±0.50 (0.135±0.02) 0.30(0.012) 0.20(0.008) 0.6 (0.024) 10.16±0.40 (0.40±0.016) 2.54 (0.1) 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. 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. TUBE OUTLINE DIMENSIONS 10.65 - 11.65 (0.419 - 0.459) Unless otherwise stated all dimensions in mm (inches) ±0.25 (0.01). 4.00 (0.16) 0.60±0.15 (0.024±0.006) 12.95 (0.51) Tube length: 500±2 (19.7±0.08) Tube quantity: 50 Tube material: Antistatic coated clear PVC. 5.20 (0.21) 3.80 (0.15) 15.70 (0.62) Murata Power Solutions, Inc. 11 Cabot Boulevard, Mansfield, MA 02048-1151 U.S.A. ISO 9001 and 14001 REGISTERED Murata Power Solutions, Inc. makes no representation that the use of its products in the circuits described herein, or the use of other 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. Specifications are subject to change without notice. © 2011 Murata Power Solutions, Inc. www.murata-ps.com/support KMP_782482C_A02 Page 2 of 2