ST70134

ST70134 - ST70134A ASCOTTM INTEGRATED ADSL CMOS ANALOG FRONT-END CIRCUIT s FULLY INTEGRATED AFE FOR CPE ADSL s OVERALL 12 BIT RESOLUTION, 1.1MHz SIGNAL BANDWIDTH IN Rx t(s) s 8.8MS/s ADC uc s 8.8MS/s DAC rod s THD: -60dB @FULL SCALE P t(s) s 4-BIT DIGITAL INTERFACE TO/FROM THE te c DMT MODEM le du s 1V FULL SCALE INPUT so ro s DIFFERENTIAL ANALOG I/O - Ob te P s ACCURATE CONTINUOUS-TIME CHANNEL ) le FILTERING t(s o s 3rd & 4th ORDER TUNABLE CONTINUOUS c bs TIME LP FILTERS du O s 0.5 WATT AT 3.3V ro ) - s 0.5mm HCMOS5 LA TECHNOLOGY P t(s s 64 PIN TQFP PACKAGE lete duc DESCRIPTION so ro ST70134 is the Analog Front End of the STMicrob P electronics ASCOTTM ADSL chipset and when O te coupled with ST70135A or ST70235 (DMT modem) allows to get a T1.413 Issue 2 or G.dmt Obsole compliant solution. TQFP64 ORDERING NUMBER: ST70134 (TQFP64) ST70134A (TQFP64) The ST70134 analog front end handles 2 transmission channels on a balanced 2 wire interconnection; a 16 to 640Kbit/s upstream transmit channel and a 1.536Mbit/s to 8.192Mbit/s downstream receive channel. This asymmetrical data transmission system uses high resolution, high speed analog to digital and digital to analog conversion and high order analog filtering to reduce the echo and noise in both receivers and transmitters. External low noise driver and input stage used with ST70134 guarantee low noise performances. The filters, with a programmable cutoff frequency, use automatic Continuous Time Tuning to avoid time varying phase...