Electronic Design

32-Bit DSCs Sport High-Res PWM

The TMS320F28015 and F28016 60-MHz, 32-bit digital signal controllers (DSCs) from Texas Instruments incorporate three 16-bit, high-resolution pulse-width modulation (HRPWM) channels in addition to eight conventional channels. The HRPWM's 150-ps resolution provides 16 bits of accuracy in a 100-kHz control loop and 12 bits at 1.5 MHz.

The chips use a mixed 16/32-bit instruction set for improved code density. The DSCs have up to 64 kbytes for flash and 12 kbytes of RAM. Peripherals for various versions of the chips include two SPI ports, an SCI port, an I2C port, and a CAN 2.0B port. The chips have a 12-bit analog-to-digital converter (ADC) and a pair of quadrature encoder pulse (QEP) interfaces.

These chips target power-supply and motor-control applications, including processor-intensive sensorless vector motor control. Pricing starts at $3.25. They're AEC Q100 automotive-qualified and available in a 100-pin low-profile quad-flat package (LQFP). A digital power development kit that includes the TMS320C2000 Digital Power Supply (DPS) software library and a series of hardware modules from Tier Electronics also is available.

Texas Instruments

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