PDSP16318A

PDSP16318/16318A PDSP16318/PDSP16318A Complex Accumulator Advance Information Supersedes version DS3708 - 2.4 September 1996 DS3708 - 3.1 November 1998 The PDSP16318/A contains two independent 20-bit Adder/Subtractors combined with accumulator registers and shift structures. The four port architecture permits full 20MHz throughout in FFT and filter applications. Two PDSP16318As combined with a single PDSP16112A Complex Multiplier provide a complete arithmetic solution for a Radix 2 DIT FFT Butterfly. A new complex Butterfly result can be generated every 50ns allowing 1K complex FFTs to be executed in 256µs. GC100 FEATURES s s s s s s s s s s s s s s Full 20MHz Throughout in FFT Applications Four Independent 16-bit I/O Ports 20-bit Addition or Accumulation Fully Compatible with PDSP16112 Complex Multiplier On Chip Shift Structures for Result Scaling Overflow Detection Independent Three-State Outputs and Clock Enables for 2 Port 20MHz Operation 1.4 micron CMOS 500mW Maximum Power Dissipation 100 CQFP package Fig.1 Pin connections - Top view (GC100) ASSOCIATED PRODUCTS PDSP16112 PDSP16116 PDSP1601 PDSP16330 16 x 12 Complex Multiplier 16 x 16 Complex Multiplier ALU and Barrel Shifter Pythagoras Processor ORDERING INFORMATION Industrial (-40°C to +85°C) PDSP16318A/IG/GC1R (20MHz - QFP) Military (-55°C to +125°C) PDSP16318/MC/GC1R (10MHz - QFP MIL STD 883C Screened) N.B. Further details of the Military grade part are available in a separate datasheet APPLICATIONS High spe...