STLC7550

GENERAL PURPOSE SIGNAL PROCESSING
ANALOG FRONT END (AFE) TARGETED FOR V.34bis MODEM AND
56Kbps MODEM APPLICATIONS 16-BIT OVERSAMPLING SD A/D AND D/A
CONVERTERS 83dB SIGNAL TO NOISE RATIO FOR SAM.PLING FREQUENCY UP TO 9.6kHz @ 3V .87dB DYNAMIC RANGE @ 3V FILTER BANDWIDTHS :
0.425 x THE SAMPLING FREQUENCY .ON-CHIP REFERENCE VOLTAGE SINGLE POWER SUPPLY RANGE :
2.7 TO 5.5V LOW POWER CONSUMPTION LESS THAN
30mW OPERATING POWER 3V STAND-BY MODE POWER CONSUMPTION
LESS THAN 3mW at 3V .PROGRAMMING SAMPLING FREQUENCY .MAX. SAMPLING FREQUENCY : 45kHz SYNCHRONOUS SERIAL INTERFACE FOR PROCESSOR DATAS EXCHANGE. MASTER
OR SLAVE OPERATIONS .0.50mm CMOS PROCESS .TQFP44 PACKAGE STLC7546 MODE OF OPERATION COMPATIBLE

The STLC7550 is a single chip Analog Front-end (AFE) designed to implement modems up to 56Kbps.It has been especially designed for host processing application in which the modulation software (V.34bis, 56Kbps) is performed by the main application processor : Pentium, Risc or DSP processors.The main target of this device is stand alone appliances as Hand Held PC (HPC), Personnal Digital Assistants (PDA), Webphones, Network Computers,Set Top Boxes for Digital Television (Satellite and Cable).To comply with such applications STLC7550 is powered nominally at 3V only.

Maximum Power Dissipation 30mW is well suited for Battery operations.In case of battery low, STLC7550 will continue to work even at a 2.7V level.It also provides clock generator for all sampling frequencies requested for V.34bis and 56Kbps applications.This new AFE can also be used for PC mother boards or add-on cards or stand alone MODEMs.It can be used in a master mode or slave mode.The slave mode eases multi AFE architecture design in saving external logical glue.