VDSL Line Driver Saves Power, Board Space and Cost

Texas Instruments has introduced the gated, dual-port THS6226, a Class H VDSL line driver that in high-speed broadband networks consumes 47 per cent less power than Class AB alternatives. In addition, by offering a digitally adjustable quiescent current, the THS6226 line driver allows for optimum power savings while still achieving high linearity and low distortion. The THS6226 also simplifies product sourcing and design by covering all VDSL profiles with a single-line driver.

Its adjustable quiescent current of 7.6-23.5mA, with a current step of 1mA, provides designers flexibility to fine-tune the power control. The driver offers low multi-tone power ratio (MTPR) distortion of 70dB with 19.8dBm for VDSL2 profile 8b to help maintain signal fidelity. It integrates an input-biasing circuit and all gain and feedback resistors to reduce system board space and cost. Wide output swing on +12V power supplies, coupled with excellent current drive, allows for up to 20dBm output power into the load.

TI offers a variety of free tools and support to speed development with the THS6226, including a SPICE-based simulation program for designing, testing, and troubleshooting a variety of basic and advanced circuits, including complex architectures, without any node or number of device limitations. Also included is software for application and calculation utilities, including an active filter design application and a fully differential amplifier component calculator. The THS6226 VDSL line driver is available now in a 5 x 5mm QFN package, priced at $1.50 (?0.93) in quantities of 1,000.

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