AS7787-A COILCRAFT | Alldatasheet
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© Coilcraft, Inc. 2008 Specifications subject to change without notice. Please check our website for latest information. © Coilcraft, Inc. 2008 Document 244-1 Document 244-1 Revised 09/25/08 These transformers have been designed to provide optimum performance with various ADSL chip sets from Analog Devices. They feature a compact size, minimum DC resistance and very low leakage inductance. Primary inductance is stable from -40°C to +85°C and the longitudinal balance is optimized for the best overall performance at the ADSL transmission speed. Most parts have been de- signed to meet UL 1950 requirements. For free evaluation samples or to discuss custom de- signs, please contact Coilcraft. SPECIFICATIONS 1. All electrical specifications referenced to line side. 2. Operating temperature range -40°C to +85°C. 3. Electrical specifications at 25°C. Line side Leakage Part inductance inductance DCR max (Ohms) number Style Chip set (mH) max (µH) Chip side Line side AS7787-A Leaded AD20MSP910/918 CO/CPE 5.0 ± 10% 16 1.21 (10-8), 1.65 (9-7) 1.42 (1-3, 2-4) AS8456-A SMT AD20MSP910/918 CO/CPE 5.0 ± 10% 16 1.21 (10-8), 1.65 (9-7) 1.42 (1-3, 2-4) Dielectric Longitudinal THD Part strength Turns ratio Capacitance balance @ 20 kHz Designed number (V) line:chip max (pF) min (dB) typ (dB) to meet AS7787-A 1875 1:1 55 40 (20 kHz – 1.1 MHz) -89 UL 1459, 1950 AS8456-A 1875 1:1 55 40 (20 kHz – 1.1 MHz) -89 UL 1459, 1950 AS8923-A 2300 1.1:1 40 (20 kHz – 1.1 MHz) -85 UL 1459, 1950 AS8908-A 2300 1.1:1 40 (20 kHz – 1.1 MHz) -85 UL 1459, 1950 AS8925-A 2300 1.2:1 40 (20 kHz – 1.1 MHz) -85 UL 1459, 1950 AS8924-A 2300 1.2:1 40 (20 kHz – 1.1 MHz) -85 UL 1459, 1950 ADSL Transformers For Analog Devices chipsets This product is not RoHS-compliant. Contact Coilcraft for current status or possible alternatives.
© Coilcraft, Inc. 2008 Specifications subject to change without notice. Please check our website for latest information. © Coilcraft, Inc. 2008 Document 244-2 Revised 09/25/08 Document 244-2 ADSL Transformers for Analog Devices Schematics A max B max C max D min E F typ G dia H dia 13,97 13,97 12,70 2,54 10,16 2,54 0,33 0,82 Leaded Transformers Surface Mount Transformers Recommended Land Pattern C B A B 10 1 A E F G D E FF H C G Dot above pin1 Recommended Board Layout A max B max C max E F typ G typ 13,46 17,75 12,70 14,99 2,50 1,27 × 1,55 10 10 Line side Line side Chip side Chip side AS7787-A, AS8456-A AS8923-A, AS8908-A AS8925-A, AS8924-A