PRODUCT DATA SHEET P2781 MICROPROFILE LINE MATCHING TRANSFORMER Features Applications ∗ ∗ ∗ ∗ ∗ ∗ ∗ ∗ ∗ ∗ ∗ ∗ Surface Mount Lead-free (Pb-free) RoHS compliant 7mm seated height Vacuum encapsulated IEC 60950 and UL 60950 certified UL Recognized Component Telecommunications V.22bis and V.32bis modems Line matching Portable computers Instrumentation DESCRIPTION P2781 is a microprofile transformer for applications where high performance and safety isolation to international standards are required in an extremely small case size. Designed specifically as a surface mount device, the P2781 features a 7mm seated height and is vacuum encapsulated and tested to 6500VDC. The part is compliant with RoHS Directive 2002/95/EC, and suitable for lead-free and conventional placement and reflow. At moderate transmit power levels (e.g. -10dBm) performance to V.32bis may be achieved. In instrumentation applications, the P2781 offers a wideband frequency response from 50Hz to 40kHz. P2781 is certified to IEC 60950 and UL 60950. P2781 is a UL Recognized Component, and is supported by an IEC CB Test Certificate. Despite the subminiature size, the performance is the equal of that of much larger components. The P2781 offers reinforced insulation, is ideal for voice telecommunications and for data communications to medium speed, and can be matched to both 600Ω and complex impedance telephone lines. ETALDOC 240/14 Page 1 of 5 October 2007 P2781 SPECIFICATIONS Electrical At T = 25°C and as circuit Fig. 1 unless otherwise stated. Parameter Conditions Min Typ Max Units Insertion Loss f = 2kHz, RL = 600Ω f = 2kHz, RL = 430Ω - - 2.0 4.0 dB dB Frequency response -3dB LF cutoff -3dB HF cutoff 200Hz - 4kHz - 50 40 - ±0.2 Hz kHz dB Return Loss 200Hz - 4kHz 18 - - dB (1) f = 450Hz 0dBm in line 3rd Harmonic - -60 -54 dBm 80 - - dB - - 10 65 Vrms Vpeak 3.88 5.5 - - kVrms kV -25 -40 - - +85 +125 95 °C °C %R.H. 205 - 245 Ω 4.2 - 4.9 mH Distortion Balance DC - 5kHz Method TG25 Saturation Excitation 50Hz 250Vrms Output voltage across line Voltage Isolation (2) 50Hz DC Operating range: Functional Storage(5) Humidity Ambient temperature Lumped equivalent circuit parameters as Fig. 1 DC resistance, RDC(3) Sum of windings Leakage inductance ΔL Shunt inductance Lp(4) 10mV 200Hz 10mV 1kHz 1.4 - 1.8 3.5 - H H Shunt loss Rp(4) 10mV 200Hz 10mV 1kHz 5 - 10 15 - kΩ kΩ ETALDOC 240/14 Page 2 of 5 October 2007 P2781 Notes 1. Third harmonic typically exceeds other harmonics by 20dB. 2. Components 100% tested at 6.5 kVDC. 3. Caution: do not pass DC through windings. Telephone line current, etc. must be diverted using choke or semiconductor line hold circuit. 4. At signal levels greater than 100mV, Lp will increase and Rp will decrease slightly but the effect is usually favourable to the return loss characteristic. 5. Excludes shipping materials. Components are dry-packed and sealed as shipped. Handle in accordance with IPC/JEDEC J-STD-033 procedure for components classified as IPC/JEDEC J-STD-020 Moisture Sensitivity Level 5a. ETALDOC 240/14 Page 3 of 5 Equivalent Circuit Fig 1 IDEAL 1:1 October 2007 P2781 PERFORMANCE 600 Ω MATCH Recommended Circuit Return Loss Fig 2 Fig 4 600 -14 6.8μ F 20%* -18 6.8nF +_ 5% LINE 6.8nF +_ 5% 430 +_ 2% dB -22 Worst Case -26 Typic al -30 * If return loss > 16d B, 300Hz - 4kHz is acc eptable, b loc king c ap a citor ma y b e rela xed to 4.7 μF +_ 50% 100Hz 200 300 20% 500 3 1kHz 2 Frequency 4 5 Frequency Response Third Harmonic Distortion vs. Signal Level Fig 3 Fig 5 -60 -0.3 Ca Ty l W or st dB -0.2 a p ic se -0.1 Third Harmonic dBc 0 Funda mental 450Hz 10 Typ ic al -65 -70 -75 -0.4 100Hz 200 300 500 1kHz 2 Frequency 3 4 5 -80 -15 10 Frequency response driven by terminal equipment (voltage scource with 430Ω series resistance) measured across 600Ω is within ±0.2dB 200Hz to 4kHz -10 -5 Fundamental Power (dBm) 0 Note: To obtain harmonic distortion power in dBm, add fundamental power in dBm to third harmonic in dBc e.g. at -10dBm power in line at 450Hz, third harmonic power is -10 + (-74) = -84dBm typical. Recommended Circuit Recommended Circuit Fig 6 Fig 7 The circuit of Fig. 6 gives good TX and RX flatness (±0.3dBm 200Hz - 4kHz). An alternative arrangement, using existing PCB sites, is shown in Fig. 7. Note, however, that TX flatness will be degraded with the topology. ETALDOC 240/14 Page 4 of 5 October 2007 P2781 CONSTRUCTION Dimensions 2.54 2.54 Fig 8 (0.1) (0.1) Connections Fig 9 13.0 max (0.51) e3 9.0 max (0.36) 7.0 max (0.28) 1.5 (0.06) NOTE: 1 6 2 5 3 4 1.77 (0.07) 1.32 (0.052) Tolerance ± 0.3mm Terminals electroplated pure tin (Sn) 5µm minimum. JESD97 Category = e3. Terminal size : 1.5 (0.06) long, 1.32 (0.05) wide Dimensions shown are in millimetres (inches) Dimensions shown are in millimetres (inches). Geometric centres of outline and pad grid coincide within a tolerance circle of 0.3mmØ. Windings may be used interchangeably as primary or secondary. SAFETY CERTIFICATION Manufactured from materials conforming to flammability requirements of UL94V-0. Distance through reinforced insulation 0.4mm minimum. Creepage and clearances in circuit are 7mm minimum where PCB pads do not exceed 3mmØ. Construction complies with IEC 60950-1, EN 60950-1 and UL 60950-1, reinforced insulation, 250Vrms maximum working voltage. Certified by BSI to IEC 60950 Third Edition (1999) (IEC CB Test Certificate No. GB592W) sub-clauses 1.5, 1.5.1, 1.5.2, 2.9, 2.9.1, 2.9.2, 2.9.3, 2.9.4, 2.9.5, 2.10, 2.10.1, 2.10.2, 2.10.3, 2.10.3.1, 2.10.3.2, 2.10.4, 2.10.5, 2.10.5.1, 2.10.7, 2.10.8, 4.7, 4.7.3, 4.7.3.1, 4.7.3.4, (Flammability Class V-0) ,5.2, 5.2.1, and 5.2.2 for a maximum working voltage of 250Vrms, nominal mains supply voltage not exceeding 250Vrms and a maximum operating temperature of +85°C in Pollution Degree 2 environment, reinforced insulation. Recognized under the Component Recognition Program of Underwriters Laboratories Inc. to US and Canadian requirements CAN/CSA C22.2 No. 60950-1-03/UL60950-1, First Edition, based on IEC 60950-1, First Edition, maximum working voltage 250Vrms, Pollution Degree 2, reinforced insulation. UL File number E203175. Additionally, Profec Technologies certifies all transformers as providing voltage isolation of 3.88kVrms, 5.5kV DC minimum. All shipments are supported by a Certificate of Conformity to current applicable safety standards. ETALDOC 240/14 Page 5 of 5 October 2007 P2781 ABSOLUTE MAXIMUM RATINGS COPYRIGHT (Ratings of components independent of circuit). Short term isolation voltage (2s) 4.6 kVrms, 6.5kVDC DC current 100μA Storage temperature -40°C to +125°C Soldering temperature Profile peak 260°C 10s Recommended peak body temperature 245°C in accordance with IPC/JEDEC J-STD-033. ETAL and P2781 are Trade Marks of Profec Technologies Ltd. The Trade Mark ETAL is registered at the UK Trade Marks Registry. Profec Technologies Ltd. is the owner of the design right under the Copyright Designs and Patents Act 1988 and no rights or licences are hereby granted or implied to any third party. British Patent No. 2283195 US Patent No. 5879598 European Patent No. 0725719 © 1997 - 2005 Profec Technologies Ltd. Reproduction prohibited. ORDERING CODE P2781 TR = Tape and Reel (Blank) = Bulk in tubes. Carrier tape width 24mm, 500 parts per 13” reel. E203175 ETAL Group Oy, Kuormatie 14, FIN-03101, Nummela Telephone: +358 (0)20 7500 330 Fax: +358 (0)20 7500 333 Website: www.etalgroup.com Email: [email protected] ETALDOC 240/14 Page 6 of 5 ISO 9001 FM 25326 October 2007