Digital Filter

The HSP43881 is a video speed Digital Filter (DF) designed to efficiently implement vector operations such as FIR digital filters. It is comprised of eight filter cells cascaded internally and a shift and add output stage, all in a single integrated circuit. Each filter cell contains a 8 x 8-bit multiplier, three decimation registers and a 26-bit accumulator. The output stage contains an additional 26-bit accumulator which can add the contents of any filter cell accumulator to the output stage accumulator shifted right by 8 bits. The HSP43881 has a maximum sample rate of 30MHz. The effective multiply accumulate (mac) rate is 240MHz.

Features

• Eight Filter Cells

• 0MHz to 30MHz Sample Rate

• 8-Bit Coefficients and Signal Data

• 26-Bit Accumulator Per Stage

• Filter Lengths Over 1000 Taps

• Expandable Coefficient Size, Data Size and Filter Length

• Decimation by 2, 3 or 4

Applications

• 1-D and 2-D FIR Filters

• Radar/Sonar

• Adaptive Filters

• Echo Cancellation

• Complex Multiply-Add

• Sample Rate Converters