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. 759-0465
Mfr. Part No.ADSP-21261SKSTZ150
TWD393.00
Each
units
150MHz SHARC - 32 bit, 40 bit 1 (SRAM) Mbit Super Harvard 3 Mbit ROM Fixed Point, Floating Point Surface Mount LQFP 144 1.14 → 1.26 V, 3.13 → 3.47 V 4
RS Stock No. 178-4986
Mfr. Part No.DSPIC33EP16GS202-I/MM
BrandMicrochip
TWD79.70
Each (In a Tube of 61)
units
120MHz - - 16bit 2 kB Harvard 16 kB Flash Fixed Point, Floating Point, MAC Surface Mount QFN S 28 3.3 V 1
RS Stock No. 880-2696
Mfr. Part No.DSPIC33EP128GM706-I/PT
BrandMicrochip
TWD197.00
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. 177-3764
Mfr. Part No.DSPIC33EP256GP504-I/PT
BrandMicrochip
TWD126.50
Each (In a Pack of 2)
units
70MHz DSPIC33EP256GP504 70MIPS 16bit 32 kB Harvard 256 kB Flash ALU Surface Mount TQFP 44 - 2
RS Stock No. 177-1594
Mfr. Part No.DSPIC33FJ16GS402-I/SO
BrandMicrochip
TWD109.60
Each (In a Tube of 27)
units
40MHz DSPIC 40MIPS 16bit 2 kB C 16 kB Flash ALU Surface Mount SOIC 28 3.3 V 2
RS Stock No. 134-5586
Mfr. Part No.dsPIC33EP128GS804-I/PT
BrandMicrochip
TWD147.50
Each (In a Tray of 160)
units
60MHz dsPIC33EP 70MIPS 16bit 8 kB DSP 128 kB Flash MAC Surface Mount TQFP 44 3 → 3.6 V 2
RS Stock No. 177-3508
Mfr. Part No.DSPIC30F4011-20I/PT
BrandMicrochip
TWD156.60
Each (In a Tray of 160)
units
120MHz DSPIC30F4011 30MIPS 16bit 2 kB Harvard 48 kB Flash ALU Surface Mount TQFP 44 - 2
RS Stock No. 178-4985
Mfr. Part No.DSPIC33EV256GM102-I/MM
BrandMicrochip
TWD114.90
Each (In a Tube of 61)
units
70MIPS - 70MIPS 16bit 16 kB Code Efficient 256 kB Flash - Surface Mount QFN 28 4.5 → 5.5 V 2
RS Stock No. 823-3422
Mfr. Part No.DSPIC33FJ128GP802-I/MM
BrandMicrochip
TWD182.50
Each (In a Pack of 2)
units
40MHz - - 16bit 16 kB RISC 128 kB Flash - Surface Mount QFN-S 28 3 → 3.6 V 2
RS Stock No. 893-8326
Mfr. Part No.DSPIC33EP64GS502-I/SO
BrandMicrochip
TWD148.00
Each (In a Pack of 2)
units
1MHz - 70MIPS 16bit 8 kB Code Efficient, MCU, Modified Harvard 64 kB EEPROM, SRAM MAC Surface Mount SOIC 28 3 → 3.6 V 2
RS Stock No. 178-5214
Mfr. Part No.DSPIC33EP512MC506-I/PT
BrandMicrochip
TWD133.90
Each (In a Tray of 160)
units
60MHz - - 16bit 48 kB Harvard 512 kB Flash - Surface Mount TQFP 64 3 → 3.6 V 2
RS Stock No. 177-3984
Mfr. Part No.DSPIC33EP128MC206-I/PT
BrandMicrochip
TWD118.00
Each (In a Pack of 2)
units
70MHz DSPIC33EP128MC206 70MIPS 16bit 16 kB Harvard 128 kB Flash ALU Surface Mount TQFP 64 - 2
RS Stock No. 666-8277
Mfr. Part No.dsPIC30F3013-30I/SO
BrandMicrochip
TWD134.00
Each
units
30MIPS dsPIC30F 30MIPS 16bit 2.048 kB RISC 1.024 kB, 24 kB Flash - Surface Mount SOIC 28 2.5 → 5.5 V 2
RS Stock No. 823-7792
Mfr. Part No.DSPIC33EP256MC502-I/SP
BrandMicrochip
TWD123.50
Each (In a Pack of 2)
units
70MHz - - 16bit 32 kB Code Efficient 256 kB Flash - Surface Mount SPDIP 28 3 → 3.6 V 2
RS Stock No. 893-8322
Mfr. Part No.DSPIC33EP64GS504-I/PT
BrandMicrochip
TWD166.50
Each (In a Pack of 2)
units
1MHz - 70MIPS 16bit 8 kB Code Efficient, MCU, Modified Harvard 64 kB EEPROM, SRAM MAC Surface Mount TQFP 44 3 → 3.6 V 2