Microchip recently released the dsPIC33FJ12GP family of digital signal controllers (DSCs), which are aimed at a new class of smart sensor applications. Due to their ultra small size (in 18- and 28-pin packages as small as 6 x 6 mm) and low cost, this 40 MIPS family enables a new class of sensor processing, dubbed smart sensors, which can enhance sensor performance and extend product life.
All embedded applications react to inputs from sensors, and often the performance of the overall system (and system reliability) is a function of the quality of sensor inputs. With the tiny package sizes of these DSCs, the processor can be moved very close to the sensor - eliminating lead noise and offloading this workload from a central processor - creating a smart sensor scenario.
Using libraries and filter design tools, digital filters can replace analog filters to reduce noise. The dsPIC33FJ12GP's on-chip analog-digital-converters (ADCs), with up to 1,1 Msps, permit signal over-sampling to improve signal-to-noise ratios. Spectral analysis can be conducted adjacent to the sensor, permitting more robust application performance and a digital connection to upstream processors. Additionally, these DSCs have sufficient performance and resources to serve as the sole processor in some smart sensor applications.
The dsPIC33FJ12GP family also features peripheral pin select, which allows designers to remap digital I/O to optimise board layout - enabling smaller boards, less noise and the use of a lower pin-count DSC.
For more information contact Bill Byrnes, Arrow Altech Distribution, +27 (0)11 923 9600.
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