The HSP50216 Quad Programmable Digital Downconverter (QPDC) is designed for high dynamic range applications such as cellular basestations where multiple channel processing is required in a small physical space. The QPDC combines into a single package, a set of four channels which include: digital mixers, a quadrature carrier NCO, digital filters, a resampling filter, a Cartesian-to-polar coordinate converter and an AGC loop.

Features
• Up to 70MSPS Input
• Four Independently Programmable Downconverter Channels in a single package
• Four Parallel 16-Bit Inputs - Fixed or Floating Point Format
• 32-Bit Programmable Carrier NCO with >115dB SFDR
• 110dB FIR Out of Band Attenuation
• Decimation from 8 to >65536
• 24-bit Internal Data Path
• Digital AGC with up to 96dB of Gain Range
• Filter Functions
    - 1 to 5 Stage CIC Filter
    - Halfband Decimation and Interpolation FIR Filter
    - Programmable FIR Filter
    - Resampling FIR Filter
• Cascadable Filtering for Additional Bandwidth
• Four Independent Serial Outputs
• 3.3V Operation
• Pb-Free Available (RoHS Compliant)

Applications
• Narrow-Band TDMA through IS-95 CDMA Digital Software Radio and Basestation Receivers
• Wide-Band Applications: W-CDMA and UMTS Digital Software Radio and Basestation Receivers