ADI Technology Reduces Broadband Power Use

Utilizing Analog Devices Inc.'s patented Adaptive Linear Power technology, the new dual-port ADLD8404 DSL line driver Class H amplifier reduces power consumption and system cost for designers of high-speed ADSL2+/VDSL2 line cards. The ADLD8404 is the industry’s first Class H VDSL line driver and reduces power use by more than 20 percent compared to competing Class AB amplifiers. Measuring 4x4mm, the device allows telecommunications operators to increase the port density of their DSLAM (digital subscriber line access multiplexer) line cards, resulting in further operating cost savings.

The dual-port ADLD8404 consists of two differential, high-output current, low-power operational amplifiers. ADI's patented Adaptive Linear Power technology tracks ADSL2+/VDSL2 input signals on two channels simultaneously, and then dynamically selects the higher peak. By ensuring the tracking supply is always at the highest level, the new line driver eliminates clipped signals and distortion even when operating at the VDSL2 transmission frequencies of up to 17.6MHz.

The dual-port ADLD8404 Class H line driver integrates two charge pumps on-chip, allowing line card designers to cost-effectively support higher channel densities in multi-port DSLAM access concentrators that distribute broadband signals to hotels and large, multi-tenant commercial and residential buildings.

ADI ADLD8404 Class H VDSL Line Driver

ADI

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