Fujitsu Announces Keywave(TM) Analogue Front End for ADSL Applications
LONDON, Dec. 15 /PRNewswire/ -- Fujitsu Microelectronics Limited has announced the first Analogue Front End (AFE) designed by its Mixed Signal Group, based in Maidenhead, UK. It is primarily intended for use in Asynchronous Digital Subscriber Loop (ADSL) access systems operating over twisted copper pair.
Utilising a superior low noise design combined with high resolution data converters has enabled Fujitsu to deliver a fully working integrated AFE. In addition, Fujitsu's renowned triple well process has been used to provide the necessary analogue/digital isolation to maintain the low noise performance of the device.
Designed in 0.35 micron process technology, the low power Fujitsu proprietary AFE provides a number of key features. These include the support of analogue echo cancellation and 15-bit data converters, and the capability for full rate (G.dmt) and reduced rate (G.lite) communication for both Central Office (CO) and Remote Terminal (RT). It is also capable of implementing two G.lite at the Central Office.
The MB86626 KeyWave AFE is part of a family of devices, including a single-chip ADSL modem scheduled for January 1999.
Offering both an integrated modem and an AFE allows the customer the option of using an existing digital core for an effective two-chip solution, or of adopting a complete single-chip solution.
Fujitsu's proprietary Error Correcting Successive Approximation (ECSA) analogue to digital converter architecture is featured on the receive channel of the device, which, in combination with other high performance CMOS designs provides a very low power solution. This is especially important for Central Office applications, where ultimately the power determines the maximum channel packing density.
Fujitsu's design also has the advantage that in comparison with other AFE devices on the market it requires no external receive path amplification, either in the form of a discrete amplifier or as an active hybrid interface.
The KeyWave AFE is designed to be used in full-rate ADSL applications conforming to ANSI T1.413 Issue 2 standards and is also compatible with reduced rate splitterless G.lite implementations.
Available in 80-pin Low-profile Quad Flat Pack (LQFP) packages of 0.5mm pin pitch, engineering samples are available now, with mass production in Q199.
SOURCE: Fujitsu Microelectronics Limited
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