Product category:
Microprocessors, Microcontrollers and DSPs
News Release from: Texas Instruments (April 2001-March 2006) | Subject: TMS320F2802, C2801 and C2802
Edited by the Electronicstalk Editorial
Team on 17 February 2006
DSP-based controllers boost PWM
precision
Four new members of the TMS320C2000 platform are optimised for motor control, digital power conversion and intelligent sensor control.
Continuing to broaden its digital signal controller portfolio, Texas Instruments has announced four new members of the TMS320C2000 platform optimised for motor control, digital power conversion and intelligent sensor control in industrial, appliance, automotive, medical and consumer applications The new controllers include the TMS320F2809 and TMS320F2802 Flash-based controllers and custom ROM-based TMS320C2801 and TMS320C2802
This article was originally published on Electronicstalk on 8 Nov 2004 at 8.00am (UK)
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All four new devices are 100% hardware and software compatible with existing TMS320F280x controllers, and they increase the portfolio to seven pin-compatible devices allowing engineers to easily switch controllers for optimised features and cost across a family of products.
The C2000 platform's ROM-based C280x and Flash-based F280x devices feature a patent-pending pulsewidth modulator (PWM) with 150ps resolution, 64 times more precise than competing processors.
TI's full TMS320C28x portfolio now includes 15 high-performance, 32bit controllers that combine the real-time performance of TI's digital signal processors (DSP) with the peripheral integration, C-language efficiency and ease of use of a microcontroller (MCU).
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Both TMS320C28x and TMS320F28x devices offer unprecedented high resolution PWM technology that provides 16 bits of accuracy in a 100kHz control loop and 12bit at 1.5MHz; competing processors limit accuracy to less than 10bit at 100kHz and less than 6bit at 1.5MHz.
In digital power applications, higher resolution PWM results in a faster transient response with a smaller ripple amplitude.
The unique accuracy of the high resolution PWM eliminates 'limit cycle' issues, which means power supply designers are now able to use digital control in high-switching frequency supplies like those found in wireless basestations, network servers, and even digital televisions.
As a result, developers benefit from cleaner power output, higher power density, smaller magnetics and more compact, cooler supplies than are possible using analogue technology.
The C28x and F28x new performance-memory-peripheral combinations also benefit new, forward-thinking motor control applications.
Self-Guided Systems recently integrated F280x controllers into the brushless DC motors used to guide the company's Hybrid Z self-stabilising, autonomous lawnmower.
The mower's cutting blades triangulate their position based on mower position and reflector location.
The Hybrid Z then navigates itself and cuts grass to a pre-set length - all without any human intervention.
"Our lawnmower is the world's only self-guided mower that can cut within a one inch accuracy range in perfectly straight, parallel lines", said Ray Hallenbeck, Electronics Manager, Self-Guided Systems.
"TI's F280x controller was the only solution that offered the on-chip functionality and C code efficiency we needed along with a high level of integration to help reduce the size and complexity of our mower's electronics system".
"The range of reprogrammable memory options allows for very scalable product development down the road, helping ensure long partnership with TI".
All C280x and F280x based devices feature a 32bit wide data path for superior performance and mixed 16/32bit instruction set for improved code density.
These devices offer exceptional system integration for controllers of their class, providing complete control system capabilities from signal input through the on-chip analogue to digital convertor (ADC), quadrature encoder pulse (QEP), and timer captures and compares through signal output with up to 16 independent PWM channels.
The 12.5Msample/s 12bit ADC, found on the F2809 controller, boasts an effective number of bits (ENOB) of 10.9 and is valid across the full -40 to +125C temperature range.
Key communication interfaces include multiple CAN, I2C, UART and SPI ports The new TMS320F2809 offers 256Kbyte of on-chip Flash, double the size of the pin-compatible F2808.
It also increases the number of PWM channels with 150ps resolution from four to six.
The F2809 will be available for sampling in the third quarter of 2006 and be qualified for full production in the first quarter of 2007.
The TMS320F2802, C2801 and C2802 are currently available for full production from TI and authorised distributors.
All devices are AEC Q100 qualified.
Both 100-pin LQFP and 100-ball BGA packaging is available.
Designers can start developing F280x based designs today using the F2808 eZdsp Starter Kit (TMDXEZS2808), available for $495 through TI's authorised distributors and on the web.
The kit includes hardware, tools, TI's comprehensive Code Composer Studio integrated development environment (IDE) and application software backed by expert training and extensive online support materials to get designers started developing embedded control applications immediately.
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