The PEF22628EV1X S LL79, manufactured by Exar Corporation, is a single-chip ADSL2+ and VDSL2 analog front-end (AFE) solution. This device is designed to interface between the line driver and the ADSL/VDSL modem transceiver, handling analog signal processing tasks crucial for reliable data transmission over telephone lines.

Applications

• ADSL2+ and VDSL2 modems
• Residential Gateways
• Customer Premises Equipment (CPE)
• Central Office (CO) Equipment
• IPTV Set-Top Boxes

Features

• Integrated ADSL2+ and VDSL2 AFE
• High-performance analog-to-digital converters (ADCs) and digital-to-analog converters (DACs)
• Programmable gain control
• Line driver interface
• Low power consumption
• Advanced filtering capabilities for noise reduction

Benefits

• Enables high-speed data transmission over existing telephone lines
• Reduces the component count and board space required for ADSL/VDSL modem designs
• Improves signal quality and reliability
• Lowers power consumption, contributing to energy efficiency
• Simplifies system design and reduces time-to-market

Additional Details

The PEF22628EV1X S LL79 supports a wide range of ADSL and VDSL standards, including ADSL2, ADSL2+, VDSL2, and G.vectoring. It integrates high-performance ADCs and DACs with sufficient dynamic range to handle the complex signal processing requirements of these technologies. The device features programmable gain control, allowing designers to optimize the signal levels for different line conditions. Its low power consumption makes it suitable for use in energy-efficient modem designs. The advanced filtering capabilities help to reduce noise and interference, improving signal quality and reliability. The PEF22628EV1X S LL79 operates from a single power supply voltage. The device is typically available in a small form factor package, making it suitable for compact modem designs.