Want to post a buying lead? If you are not a member yet, please select the specific/related part number first and then fill the quantity and your contact details in the "Request for Quotation Form" on the left, and then click "Send RFQ".Your buying lead can then be posted, and the reliable suppliers will quote via our online message system or other channels soon.
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.
For digital tuning applications, a separate multiplier is provided which allows the incoming data stream to be multiplied, or mixed, by a user supplied mix factor. A two pin interface is provided for serially loading the mix factor from an external source or selecting the mix factor from an on-board ROM. The on-board ROM contains samples of a sinusoid capable of spectrally shifting the input data by one quarter of the sample rate, FS/4. This allows the chip to function as a digital down converter when the filter stages are configured as a low-pass filter.
The serial interface for 3- input and output data is compatible with the serial ports of common DSP microprocessors.
Coefficients and configuration data are loaded over a bidirectional eight bit interface.
• 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)
HSP43124SC-45 Typical Application
• Low Cost FIR Filter • Filter Co-Processor • Digital Tuner