Digital Filter

The HSP43881/883 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 HSP43881/883 has a maximum sample rate of 25.6MHz. The effective multiply accumulate (mac) rate is 204MHz.

Features

• This Circuit is Processed in Accordance to MIL-STD-883 and is Fully Conformant Under the Provisions of Paragraph 1.2.1.

• 0MHz to 25.6MHz Sample Rate

• Eight Filter Cells

• 8-Bit Coefficients and Signal Data

• Low Power CMOS Operation

• ICCSB 500µA Maximum

• ICCOP 160mA Maximum at 20MHz

• 26-Bit Accumulator Per Stage

• Filter Lengths Up to 1032 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