PM4381 Analog Front End for ADSL2+

The PM4381 Analog Front End (AFE) is a highly integrated solution for Customer Premises Equipment (CPE) ranging from standalone modems to Residential Gateways. The PM4381 AFE is suitable for ADSL2+ CPE, and is fully backwards compatible with ADSL2 and ADSL interface technologies.

The PM4381 AFE achieves industry-leading performance giving DSL service providers the ability to offer faster broadband connections over farther distances. The high degree of integration allows DSL box vendors to build CPE products with lower BOM cost, and in more attractive, smaller form factors.

The PM4381 integrates a high performance 5V line driver and offers extremely low distortion and noise in both transmit and receive paths. The low noise and distortion, combined with high-resolution data converters and integrated programmable receive equalizer and filters, reduce the need for complex and costly external filters to achieve optimum rate/reach performance. In addition, the device integrates a 16-bit digitally controlled crystal oscillator (DCXO), and an optional 1.8V regulator that allows the PM4381 to be used in a system that only provides 3.3V and 5V.

The PM4381 AFE implements PMC-Sierra's AVIS (ADSL2+/VDSL2 Interface Specification) digital interface, which allows flexible connection to a variety of Discrete Multitone (DMT) processors, including PMC-Sierra's MSP7120 ADSL2+ Residential Gateway (RG) SoC.