SBOS531E August 2010 – June 2019 AFE031
The AFE031 is an integrated powerline communication analog front-end (AFE) device built from a variety of functional blocks that work in conjunction with a microcontroller. The AFE031 provides the interface between the microcontroller and a line coupling circuit. The AFE031 delivers high performance and is designed to work with a minimum number of external components. Consisting of a variety of functional and configurable blocks, the AFE031 simplifies design efforts and reduces the time to market of many applications.
The AFE031 includes three primary functional blocks:
The AFE031 also consists of other support circuitry blocks that provide zero crossing detection, an additional two-wire communications channel, and power-saving biasing blocks (see the ). All of these functional blocks are digitally controlled by the microcontroller through the serial interface (SPI).
|PA||The PA block includes the power amplifier and associated pedestal biasing circuitry|
|Tx||The Tx block includes the Tx_Filter and the Tx_PGA|
|Rx||The Rx block includes the Rx PGA1, the Rx Filter, and the Rx PGA2|
|ERx||The ER block includes the two-wire receiver|
|ETx||The ER block includes the two-wire transmitter|
|DAC||The DAC block includes a digital-to-analog converter|
|ZC||The ZC block includes both zero crossing detectors|
|REF1||The REF1 block includes the internal bias generator for the PA block|
|REF2||The REF2 block includes the internal bias generators for the Tx, Rx, ERx, and ETx blocks|