Line Driver For VDSL DMT – low power and high fidelity

Intersil announced a high-speed dual operational amplifier designed for use with Very-high-bit-rate Digital Subscriber Line (VDSL) and Asymmetric Digital Subscriber Line (ADSL) line driving in Discrete Multi-Tone (DMT) based solutions aimed at video-on-demand service applications.

The EL1517 is the latest addition to Intersil's family of xDSL line drivers optimized for low power, ease of use and a reduced number of external components and extremely good linearity. The EL1517 makes use of Intersil's trench isolated complementary bipolar process to achieve very low distortion and less than 500 mW/port total power consumption in VDSL DMT applications. The driver has been optimized for 5-band VDSL signaling requiring high bandwidth and low distortion in the 4 MHz to 17 MHz frequency range.

The EL1517 can be used for VDSL Central Office (CO) or Customer Premise (CP) applications. The device can also be used in ADSL, ADSL2+ CPE applications since it easily exceeds the requirements for these standards. The bipolar transistor based EL1517 offers better fidelity than similar CMOS line drivers integrated in some VDSL AFEs. Since the EL1517 can be used with up to a 12 V supply rail, this allows for use of transformer ratios that maintain better signal to noise ratio for the received signal as compared to CMOS solutions using 5V supply rails. This can provide higher data rates and longer reach in VDSL applications.

The addition of this VDSL amplifier completes Intersil's portfolio of very high performance DSL line drivers ranging from ADSL to ADSL2+ and VDSL. Offered in the tiny 16-pin 4×4 mm MLF package at 16 mm2 per port, the line driver offers the industry's smallest footprint for VDSL line card designs.

Intersil Corp , Camberley, Surrey GU15 3YQ, UK.

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