LL1574

        Tibeliusgatan 7 S-761 50 NORRTÄLJE SWEDEN Phone Fax International +46 - 176 13930 +46 - 176 13935 Domestic 0176-13930 0176-13935 AES - DATS conversion transformer LL1574 LL1574 is a pulse transformer designed for impedance matching between 110 Ω and 75 Ω systems. The transformer has a large amorphous metal core which results in low copper resistance, high signal tolerance and low internal capacitance. Turns ratio: Impedance ratio Dims: (Length x Width x Height above PCB (mm)) 1 : 1.2 75 : 110 15 x 9 x 11 Pin Layout (Top View) and Winding Schematic ’ 1 2 LL1574 3 4 3 4 110 Ω 1 2 75 Ω Spacing between pins: Spacing between rows of pins: Rec. PCB hole diameter: Weight Core Static resistance of primary (Pins 1 - 2): Static resistance of secondary(Pins 3 - 4): Maximum primary signal • time before saturation: Maximum no load current at above conditions: Primary main inductance (tuned at 10 kHz, 2 V): Primary leakage inductance: Total coupling capacitance: Winding capacitance: Isolation between windings: Source impedance: Optimum load impedance: 5.08 mm (0.2") 10.16 mm (0.4") 1.5 mm 2 grams Amorphous core material 1.0 Ω 1.1 Ω 160 µVs at 8 volts p-p. Î = 3 mA 40mH 1.3 µH < 15 pF < 1 pF 2 kV 0 -- 500 Ω 200 Ω Application example: Interface between 110 ohms AES/EBU and 75 ohms DATS/AES3id networks LL1574 110 ohm AES/EBU network, 4Volts 1 2 3 LL1574 220 3 100 1 2 110 ohm AES/EBU network, 1.2 Volts 4 4 75 ohm DATS/AES3id network, 1Volt R011107