Digital Signal Processors

Digital signal processors (DSPs) take signals like voice, audio or video and then manipulate them. They capture the signals as digital information, process it and then feed the information back for use. They do this either digitally or in an analogue format by going through an Audio Digital-to-Analogue Converter (DAC). All of this happens at very high speeds.


What are digital signal processors used for?

Digital signal processors are used for processing audio, video and graphics. They can make sound clearer, data faster and images sharper. For example, when used in Hi-Fi equipment, DSPs can create the illusion of three dimensional sound. 


Because they're programmable, DSPs can be used in a wide variety of applications, from mobile phones to computers and toys. They're compact in size and don't use a lot of power. 


Choosing the right digital signal processor

When you're looking for the right DSP there are various features to consider: 

  • Frequency – the number of data points per second, which you can think of as the speed. 
  • RAM size – usually the greater the size, the better the performance. 
  • Program memory – to customise a DSP for a specific purpose.

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Description Price Maximum Frequency Series Device Million Instructions per Second Data Bus Width RAM Size Instruction Set Architecture Program Memory Size Program Memory Type Numeric and Arithmetic Format Mounting Type Package Type Pin Count Typical Operating Supply Voltage Number of UART Channels
RS Stock No. 178-4869
Mfr. Part No.DSPIC33EP512MC202-I/SO
BrandMicrochip
kr 29,338
Each (In a Tube of 27)
Units
5.5MHz - - 16bit 48 kB RISC 512 kB Flash - Surface Mount SOIC 28 3 → 3.6 V 2
RS Stock No. 823-3438
Mfr. Part No.DSPIC33FJ64GS610-I/PF
BrandMicrochip
kr 49,93
Each
Units
40MHz - - 16bit 9 kB RISC 64 kB Flash - Surface Mount TQFP 100 3 → 3.6 V 2
RS Stock No. 178-4899
Mfr. Part No.DSPIC30F4011-30I/ML
BrandMicrochip
kr 49,846
Each (In a Tube of 45)
Units
30MIPS dsPIC30F 30MIPS 16bit 2.048 kB RISC 1.024 kB, 48 kB Flash - Surface Mount QFN 44 2.5 → 5.5 V 2
RS Stock No. 170-4520
Mfr. Part No.XRT6166CD-F
BrandEXAR
kr 114,519
Each (In a Tube of 27)
Units
2.048MHz - - 8bit - - - - - Surface Mount SOIC 28 - -
RS Stock No. 798-4463
Mfr. Part No.TMS320C5535AZHH05
kr 29,84
Each
Units
50MHz - 50MIPS 32bit 320 kB DSP 128 kB ROM Fixed Point Surface Mount BGA 144 1.05 V 1
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