LSI (LSI Logic Corperation ) : SpeedREACH DPS8003

G.lite Analog Front End

The DPS8003 is an analog front-end (AFE) that is designed to perform all of the analog functions of the receive (RX) and transmit (TX) paths for ADSL for G.lite, excluding POTS reject filtering and high-voltage line drivers/receivers. The DPS8003 requires no external circuitry beyond a pair of precision resistors and bypass/coupling capacitors. Note that for full compliance with the ITU G.992.2 transmit PSD masks, additional off-chip filtering in the TX path is needed; in frequency division multiplexing (FDM) systems, additional off-chip bandsplit filtering may be required for system optimization.

Features ADSL AFE for CPE with full receive (RX) and transmit (TX) analog signal path for G.lite (excluding POTS reject filter and high-voltage line drivers/receivers) Fully monolithic: 2 precision resistors, 2 non-critical resistors, and decoupling capacitors required Support for both echo-cancelled and FDM-based systems; full analog path support in hardware Compatible with ITU G.992.2 (G.lite) standard 14-bit linear ADCs and dual 14-bit linear DACs 4th-order lowpass filters for RX/TX paths, with ±5% cutoff frequency accuracy RX channel: support for both 138 kHz and 276 kHz (for ADSL over ISDN) TX channel: support for 552 kHz (G.lite) RX path PGAs: 44 dB in 0.25 dB steps TX path PAAs: 24 dB in 1 dB steps Entire RX channel linearity: 80 dB MTPR Entire TX channel linearity: 80 dB MTPR 12-bit DAC to support external VCXO RX input-referred noise at peak gain: 160 dBm/Hz at 300 kHz

Technology:	ADSL
Package:	unknown 0 Pin
Linux support:	No