Four-Channel Wideband Programmable DownConverter

Product Status: Mass Production


The ISL5416 Four-Channel Wideband Programmable Digital DownConverter (WPDC) is designed for high dynamic range applications such as cellular basestations where the processing of multiple channels is required in a small physical space. The WPDC combines four channels in a single package, each including: an NCO, a digital mixer, digital filters, an AGC and a resampling filter.

All channels are independently programmable and may be updated in real time. Each of the four channels can select any of the four digital input buses. Each of the tuners can process a W-CDMA channel. Channels may be cascaded or polyphased for increased bandwidth. Selectable outputs include I samples, Q samples, and AGC gain. Outputs from the part are available over the parallel, serial or uP interfaces.


  • Up to 95MSPS Input
  • Four Parallel 16-bit Fixed or 17-bit Floating Point Inputs
  • Programmable RF Attenuator/VGA Control
  • 32-Bit Programmable Carrier NCO with > 110dB SFDR
  • 20-bit Internal Data Path
  • Filter Functions
  • Multi-Stage Cascaded-Integrator-Comb (CIC) Filter
  • Two programmable FIR Filters (first up to 32-taps, second up to 64-taps)
  • Half Band Interpolation Filter
  • Resampling FIR Filter
  • Overall decimation from 1 to >4096
  • Digital AGC with up to 96dB of Gain Range
  • Up to Four Independent 16-bit Parallel Outputs
  • Serial Output Option
  • 16-bit Parallel µP Interface
  • 1.8V core, 3.3V I/O Operation
  • Evaluation Board and Configuration Software available
  • Pb-free available


 Block Diagram


Basic Information
Production Status
Mass Production
Clock Rate (MHz)
16 Bits
Decimation Factors
4 to gt 16k
CIC HB Programmable FIR Re-Sampler
Qualification Level
Temperature Range
-40 to +85

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