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LF43891
DEVICES INCORPORATED
9 x 9-bit Digital Filter
LF43891
DEVICES INCORPORATED
9 x 9-bit Digital Filter
DESCRIPTION
The LF43891 is a video-speed digital filter that contains eight filter cells (taps) cascaded internally and a shiftand-add output stage. A 9 x 9 multiplier, three decimation registers, and a 26-bit accumulator are contained in each filter cell. The output stage of the LF43891 contains a 26-bit accumulator which can add the contents of any filter stage to the output stage accumulator shifted right by 8 bits. 8-bit unsigned or 9-bit two’s complement format for data and coefficients can be independently selected. Expanded coefficients and word sizes can be processed by cascading multiple LF43891s to implement larger filter lengths without affecting the sample rate.
LF43891 Datasheet
