Houston, Tex. Texas Instruments new TMS320F2801, TMS320F2806 and TMS320F2808 digital signal controllers combine the real-time performance of digital signal processors with the peripheral integration, C-language efficiency and ease of use of a microcontroller for motor control, power conversion, and advanced sensing applications. The units deliver 100 MIPS of 32-bit DSP performance for less than $5 in large volumes.
The units are said to provide complete control system capabilities from signal input through the on-chip ADC, quadrature encoder pulse (QEP), and timer captures and compares through signal output with up to 16 independent PWM channels, enabling a single F2808 to control up to five independent three-phase motors. Comparatively, competitors' DSP-based devices only provide up to 60 MIPS of 16-bit DSP performance, according to TI.
The DSP core architecture of the devices feature a 32-bit wide data path for superior performance and mixed 16-/32-bit instruction set for improved code density.
Among the features of the three new controllers is their PWM technology that provides 16 bits of accuracy in a 100 KHz control loop and 12 bits at 1MHz. The controllers' accuracy eliminates 'limit cycle' issues, enabling power supply designers to employ digital control in high switching frequency supplies like those found in wireless base stations, network servers, and even digital televisions, resulting in cleaner power output, higher power density, smaller magnetics, and more compact, cooler supplies than are possible using analog technology.
The F2808 controller also provides a 16-channel, 12-bit analog-to-digital converter (ADC) with the conversion speed (up to 6.25 MSamples/s) needed for even the highest performance embedded control applications.
Customer requests for system flexibility and development ease were a priority in designing the new F28x controllers. Developers can operate each of the PWM channels, timers, QEPs, and captures either independently or synchronized together. Modular design of F28x peripherals reduces overall system cost through enhanced scalability and reuse, increases ease of development, and accelerates time to market by allowing developers to, for example, leverage a single software driver across an entire peripheral set, according to TI.
Sampling now, the TMS320F2801 controller is $4.95, the TMS320F2806 is $7.45, and the TMS320F2808 is $9.95, all in production quantities. Each device will be qualified to the Q100 automotive standard and available in both a 100-pin LQFP and 100-ball BGA package, with volume production for all three devices scheduled for the third quarter of 2005.
The F2808 eZdsp Starter Kit (TMDXEZS2808), available now for $495 through TI's authorized distributors and on the web, 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. For more information, see www.ti.com/f2808ezdsp.
For more information on the F2801, F2806, and F2808 controllers, visit www.ti.com.