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The EL1503A ADSL Line Driver contains two wideband high-voltage drivers which are ideally suited for both ADSL and HDSL2 applications. They can supply a 39.2V_P-P signal into a 22Ω load while exhibiting very low distortion. The EL1503A also has a number of power saving features. The I_ADJ pin can be used to set the maximum supply current and the C₀ and C₁ pins can be used to digitally vary the supply current to one of four modes. These modes include full power, low power, terminate only and power down.

The EL1503A uses current-feedback type amplifiers, which achieve a high slew rate while consuming moderate power. They retain their frequency response over a wide range of externally set gains. The EL1503A operates on ±5V to ±12V supplies 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 QFN packages. Center pins on each side of the 20 Ld and 16 Ld packages are used as ground connections and heat spreaders. The QFN package has the potential for a low θ_JA (<40°C/W) and dissipates heat by means of a thermal pad that is soldered onto the PCB. All package options are specified for operation over the full -40°C to +85°C temperature range.

Key Features

• High power ADSL driver
• 39.2VP-P differential output drive into 22Ω
• 42.4VP-P differential output drive into 65Ω
• Driver 2nd/3rd harmonics of -66dBc/-72dBc at 2VP-P into 100Ω differential
• Supply current of 12.5mA per amplifier
• Supply current control
• Power saving modes
• Standard surface-mount packages
• Ultra-small QFN package
• Pb-free plus anneal available (RoHS compliant)

Applications

• ADSL line drivers
• HDSL2 line drivers
• Video distribution amplifiers