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. 177-1763
Mfr. Part No.DSPIC33EP128GP502-I/SP
BrandMicrochip
PHP162.08
Each (In a Pack of 2)
units
60MHz DSPIC 70MIPS 16bit 16 kB C 128 kB Flash ALU Surface Mount SPDIP 28 3.3 V 2
RS Stock No. 177-3858
Mfr. Part No.DSPIC33FJ256MC710A-H/PF
BrandMicrochip
PHP660.87
Each
units
40MHz DSPIC33FJ256MC710A 20MIPS 16bit 30 kB Harvard 256 kB Flash ALU Surface Mount TQFP 100 - 2
RS Stock No. 912-6785
Mfr. Part No.DSPIC33FJ128MC802-E/SP
BrandMicrochip
PHP313.95
Each (In a Tube of 15)
units
40MHz - - 16bit 16 kB RISC 128 kB Flash - Through Hole SPDIP 28 3.3 V 2
RS Stock No. 876-6749
Mfr. Part No.DSPIC33FJ256GP506-I/PT
BrandMicrochip
PHP290.782
Each (In a Tray of 160)
units
40MHz - - 16bit 16 kB Modified Harvard 256 kB Flash - Surface Mount TQFP 64 3 → 3.6 V 2
RS Stock No. 399-741
Mfr. Part No.DSPIC33FJ12GP202-I/SO
BrandMicrochip
PHP184.034
Each (In a Pack of 5)
units
40MIPS - - 16bit 1 kB RISC 12 kB Flash - Surface Mount SOIC 28 3 → 3.6 V 1
RS Stock No. 177-1588
Mfr. Part No.DSPIC33EP32MC202-I/SO
BrandMicrochip
PHP93.22
Each (In a Tube of 27)
units
60MHz DSPIC 70MIPS 16bit 4 kB C 32 kB Flash ALU Surface Mount SOIC 28 3.3 V 2
RS Stock No. 880-2696
Mfr. Part No.DSPIC33EP128GM706-I/PT
BrandMicrochip
PHP347.26
Each
units
70MIPS dsPIC33EP 70MIPS 16bit 16 kB C Compiler, DSP, MCU, Modified Harvard 128 kB Flash Fixed Point, Floating Point Surface Mount TQFP 64 3 → 3.6 V 4
RS Stock No. 810-3914
Mfr. Part No.DSPIC33EP512GP502-I/SP
BrandMicrochip
PHP228.90
Each
units
5.5MHz - - 16bit 48 kB RISC 512 kB Flash - Through Hole PDIP 28 3 → 3.6 V 2
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