KMP_782485C MURATA | Alldatasheet
Document overview
- Manufacturer or author: Provided By ALLDATASHEET.COM(FREE DATASHEET DOWNLOAD SITE)
- PDF pages: 2
Technical content
KMP_782485C_A03 Page 1 of 2 Technical enquiries - email: mk@murata-ps.com, tel: +44 (0)1908 615232www.murata-ps.com
782485 Series
ADM2485 Compatible Converter Transformers For full details go to www.murata-ps.com/rohs SELECTION GUIDE Order Code Nominal Input Voltage Nominal Output Voltage Max. Output Current Isolation Voltage Turns Ratio Package StyleV V mA V RMS 782485/35C 3.3 6.0 200 2500 1CT:2.2CT DIL 782485/55C 5.0 6.0 200 2500 1CT:1.5CT DIL CHARACTERISTICS 782485/35C Parameter Conditions 782485/35C 782485/55C UnitsTyp. Max. Typ. Max. Primary Inductance, LP 100kHz, 10mV 234 513 μH Leakage Inductance, LL 100kHz, 10mV 168 192 nH Interwinding Capacitance, CWW 100kHz, 10mV 24 50 37 50 pF Primary DC Resistance, RDC <0.1VDC 273 500 383 600 mΩ Volt-time Product, Et1 5kHz, 5V 12 19 Vμs ABSOLUTE MAXIMUM RATINGS Operating free air temperature range -40°C to 85°C Storage temperature range -50°C to 125°C Isolation voltage (flash tested for 1 second) 2.5kVrms SOLDERING INFORMATION2 Peak wave solder temperature 300˚C for 10 seconds Pin finish Matte tin Specifications typical at TA = 25°C 1 Where pulse applied across pins 1 and 2. 2 For further information, please visit www.murata-ps.com/rohs TECHNICAL NOTES ISOLATION VOLTAGE ‘Hi Pot Test’, ‘Flash Tested’, ‘Withstand Voltage’, ‘Proof Volt- age’, ‘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. 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 opera- tion?” 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 volt- age 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 cor- rectly 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-acces- sible circuitry according to safety standard requirements. REPEATED HIGH-VOLTAGE ISOLATION TESTING 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 environ- ment. 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 de- pend 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 there- fore 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. This consideration equally applies to agency recog- nized parts rated for better than functional isolation where the wire enamel insulation is always supple- mented by a further insulation system of physical spacing or barriers.
FEATURES
/square6 RoHS compliant /square6 Analog Devices ADM2485 compatible /square6 2.5kVrms isolation /square6 Industry-standard pinout /square6 UL 94 V-0 package materials /square6 Low profile /square6 Toroidal construction /square6 Fully encapsulated /square6 Industrial temperature range /square6 Surface mount versions available soon /square6 Recommended by Analog Devices, Inc. /square6 Backward compatible with Sn/Pb soldering systems
DESCRIPTION
The 782485 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.
KMP_782485C_A03 Page 2 of 2 Technical enquiries - email: mk@murata-ps.com, tel: +44 (0)1908 615232www.murata-ps.com ADM2485 Compatible Converter Transformers 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. © 2008 Murata Power Solutions, Inc. USA: Mansfield (MA), Tel: (800) 233 2765, email: sales@murata-ps.com Canada: Toronto, Tel: (866) 740 1232, email: toronto@murata-ps.com UK: Milton Keynes, Tel: +44 (0)1908 615232, email: mk@murata-ps.com France: Montigny Le Bretonneux, Tel: +33 (0)1 34 60 01 01, email: france@murata-ps.com Germany: München, Tel: +49 (0)89-544334-0, email: ped.munich@murata-ps.com Japan: Tokyo, Tel: 3-3779-1031, email: sales_tokyo@murata-ps.com Osaka, Tel: 6-6354-2025, email: sales_osaka@murata-ps.com Website: www.murata-ps.jp China: Shanghai, Tel: +86 215 027 3678, email: shanghai@murata-ps.com Guangzhou, Tel: +86 208 221 8066, email: guangzhou@murata-ps.com Murata Power Solutions, Inc. 11 Cabot Boulevard, Mansfield, MA 02048-1151 U.S.A. Tel: (508) 339-3000 (800) 233-2765 Fax: (508) 339-6356 www.murata-ps.com email: sales@murata-ps.com ISO 9001 REGISTERED PACKAGE SPECIFICATIONS MECHANICAL DIMENSIONS RECOMMENDED FOOTPRINT DETAILS 3.44±0.50 (0.135±0.02) 6.35 (0.25) 9.14 (0.360) Max. 9.77 (0.385) Max. Primary Secondary 0.30(0.012) (0.40±0.016) 0.6 (0.024) 2.54 (0.1) 782485/35C XYYWW 2.54 (0.10) 2.54 (0.10) -0.00 (0.000) Unless otherwise stated all dimensions in mm (inches) ± 0.25 (0.01). Unless otherwise stated all dimensions in mm (inches) ±0.25 (0.01). Package Weight 1.0g TYP . TUBE OUTLINE DIMENSIONS 0.60±0.15 (0.024±0.006) 4.00 (0.16) 5.20 (0.21) 10.65 - 11.65 (0.419 - 0.459) 12.95 (0.51) 3.80 (0.15) 15.70 (0.62) Unless otherwise stated all dimensions in mm (inches) ±0.25 (0.01). Tube length: 500±2 (19.7±0.08) Tube quantity: 50 Tube material: Antistatic coated clear PVC. TOP VIEW