The EL1503A ADSL Line Driver contains two widebandhigh-voltage drivers which are ideally suited for both ADSLand HDSL2 applications. They can supply a 39.2VP-P signalinto a 22Ω load while exhibiting very low distortion. TheEL1503A also has a number of power saving features. TheIADJ pin can be used to set the maximum supply current andthe C0 and C1 pins can be used to digitally vary the supplycurrent to one of four modes. These modes include fullpower, low power, terminate only and power down.The EL1503A uses current-feedback type amplifiers, whichachieve a high slew rate while consuming moderate power.They retain their frequency response over a wide range ofexternally set gains. The EL1503A operates on ±5V to ±12Vsupplies and consumes only 12.5mA per amplifier.The device is supplied in a thermally-enhanced 20 Ld SOIC(0.300”) and the small footprint (4x5mm) 24 Ld QFNpackages. Center pins on each side of the 20 Ld and 16 Ldpackages are used as ground connections and heatspreaders. The QFN package has the potential for a low θJA(<40°C/W) and dissipates heat by means of a thermal padthat is soldered onto the PCB. All package options arespecified for operation over the full -40°C to +85°C
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