The Serial I/O Filter is a high performance filter engine that is ideal for off loading the burden of filter processing from a DSP microprocessor. It supports a variety of multistage filter configurations based on a user programmable filter and fixed coefficient halfband filters. These configurations include a programmable FIR filter of up to 256 taps, a cascade of from one to five halfband filters, or a cascade of halfband filters followed by a programmable FIR. The half band filters each decimate by a factor of two, and the FIR filter decimates from one to eight. When all six filters are selected, a maximum decimation of 256 is provided.

特性 Features

? 45MHz Clock Rate

? 256 Tap Programmable FIR Filter

? 24-Bit Data, 32-Bit Coefficients

? Cascade of up to 5 Half Band Filters

? Decimation from 1 to 256

? Two Pin Interface for Down Conversion by FS/4

? Multiplier for Mixing or Scaling Input with an External Source

? Serial I/O Compatible with Most DSP Microprocessors

? Pb-Free Plus Anneal Available (RoHS Compliant)

Applications

? Low Cost FIR Filter

? Filter Co-Processor

? Digital Tuner