ANALOG DEVICES’ CLASS H VDSL LINE DRIVER AMPLIFIER INCORPORATES PATENTED SIGNAL POWER TRACKING TECHNOLOGY TO REDUCE BROADBAND POWER USE

- Designed with ADI’s patented Adaptive Linear Power™ technology, the ADLD8404 ultra-low power, dual-port Class H line driver amplifier eases thermal constraints in ADSL2+/VDSL2 line cards.

Norwood, MA (09/09/2010) - Analog Devices, Inc. (ADI), a world leader in semiconductors for mixed-signal processing applications and leading supplier of signal conditioning technology, today introduced a dual-port DSL line driver Class H amplifier that 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. The new driver’s size-efficient package (4 mm x 4 mm) also allows telecommunications operators to increase the port density of their DSLAM (digital subscriber line access multiplexer) line cards, resulting in further operating cost savings. Click here for more information and to download a data sheet.

The dual-port ADLD8404 consists of two differential, high-output current, low-power operational amplifiers. The driver incorporates Analog Devices’ patented Adaptive Linear Power™ technology (U.S. Patent No. 6636103), a technique that 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 17.6 MHz. 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.

ADLD8404 Class H VDSL Line Driver Key Features and Benefits:

  • Two differential DSL channels include current feedback and high-output current amplifiers with integrated resistors and biasing network.
  • 20.4 dBm line power
  • Single 14-V supply
  • 40-V p-p differential output voltage
  • Low distortion
    o -65 dBc MTPR (multi-tone power ratio) at 20.4 dBm, operating 26 kHz to 2.2 MHz
    o -55 dBc MTPR at 14.5 dBm, operating 5.2 MHz to 17.6 MHz

Availability and Pricing

Product Sample
Availability
Temperature
Range
Price Each
Per 1,000
Packaging
ADLD8404 Now −40°C to +85°C $1.42 24-lead LFCSP
4 mm x 4 mm

More Information and Samples

About Analog Devices

Innovation, performance, and excellence are the cultural pillars on which Analog Devices has built one of the longest standing, highest growth companies within the technology sector. Acknowledged industry-wide as the world leader in data conversion and signal conditioning technology, Analog Devices serves over 60,000 customers, representing virtually all types of electronic equipment. Analog Devices is headquartered in Norwood, Massachusetts, with design and manufacturing facilities throughout the world. Analog Devices is included in the S&P 500 Index.

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Editor's Contact Information:

Bob Olson
781/937-1666

bob.olson@analog.com

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