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News and New Products
Processor expands configurable on-chip analog performance
By Robert Cravotta -- EDN, 10/16/2003
Cypress MicroSystems’ PSOC (programmable-system-on-chip) devices integrate a 24-MHz, 8-bit microcontroller core with field-programmable, mixed-signal arrays; flash memory; and a MAC (media-access controller) (Picture). The devices feature dynamically reconfigurable analog- and digital-logic blocks that can create more than 100 library peripheral components. The same silicon blocks can support different functions on different clock cycles. The new generation CY8C27x device family improves the analog support of earlier PSOC devices with instrumen-tation-quality analog performance that includes rail-to-rail inputs, programmable gain, low noise, input leakage and voltage offset, and peripheral blocks for as many as four 14-bit ADCs.
CY8C27x devices support integration opportunities for analog components, such as in-strumentation amplifiers, filters, including Bessel, Butterworth, and elliptical with as many as eight poles; rms/dc converters; and programmable-gain amplifiers. They have a noise thresh-old of 70 nV/
and an analog offset voltage of 6 mV digitally trimmed to less than 100 μV. The family includes digital- and system-level enhancements, such as hardware I2C communications; increased interconnects for data and clocking; synchronous, asynchro-nous, and latched deadband modes to enable demanding motor-control applications; logic; and additional I/O modes to improve drive and EMI performance. The CY8C27x has sleep timers, watchdog circuits, and power-supervisor functions that enable typical sleep current of 3 μA.
The CY8C27x family is available now for $1.99 (50,000) and comes in eight packages ranging from eight-pin PDIPs to a 48-pin MLF/QFN. It includes 12 on-chip analog blocks, eight digital blocks, an 8×8 multiplier with 32-bit accumulator, 16 kbytes of flash memory, and 256 bytes of SRAM. Automotive-temperature-qualified devices will be available starting in the fourth quarter of 2003. The CY8C24x devices will become available for sampling in the fourth quarter of 2003 and will include six analog and four digital blocks, 4 kbytes of flash memory and 256 bytes of SRAM.
Cypress MicroSystems, www.cypress.com.
