Norwood, Mass. -- Analog Devices will be coming to the eUSA show with the launch of its new ARM-based microcontroller family of devices that integrate a 16/32 bit ARM7TDMI RISC processor core with a precision 12-bit successive approximation data converter and a wide assortment of on-chip digital and analog peripherals circuitry.
With this move, ADI will be going head-to-head against the long list of traditional MCU vendors, many of whom are now upgrading their lines with ARM-based cores. However, very few if any have announced the integration of an on-chip precision data converter, as ADI has done.
In addition to the ARM core with processing capability up to 45 MIPS peak performance and the 1 MSPS 12-bit analog-to-digital conversion, ADI has embedded up to four individual 12-bit digital-to-analog converters. Also, unlike any other microcontroller, the ADuC702x devices integrate a precision bandgap reference (10ppm/degrees C). Other peripherals include a comparator, PLA (programmable logic), and 3-phase PWM generator. The devices also support flexible power-down and wake-up modes.
The new analog MCU family certainly meets the ever-growing need for more processing power in applications where precision analog is required, such as in industrial and instrumentation, communications infrastructure, and automotive systems. According to Donal Killackey, ADI product marketing manager for precision microcontroller products, system OEMs especially in the automotive market would like such an microcontroller in a tiny chip scale packages.
He noted that his new microcontrollers deliver a complete, programmable, 12-bit analog front-end combined with a RISC processing core on a monolithic chip. Designers can now maintain performance while gaining faster design times using a single-chip solution that solves the challenge of integration between the analog front-end and the digital functions of the microcontroller.
Killackey believes performance, cost, and power requirements are becoming more and more stringent and customers would like to move toward single-chip microcontrollers with embedded precision analog functionality. Traditionally, an intelligent sensor design or data capture system would have used discrete devices to satisfy each element in the design, such a op amps, A/D converters, and voltage references along with a microcontroller and interface circuitry, he said.
ADI's ADuC702x line has fourteen different members with varying amounts of on-chip flash memory and SRAM, general purpose I/O, analog inputs, A/D and D/A conversion as well as other digital and analog peripherals. Some devices have a PWM, while others don't.Another differentiator is the CAN bus peripheral, which Killackey says will be a very popular feature for the automotive market.
Significant, according to Killackey is the 1 MSPS 12 bit precision A/D converter. Key specs at 1 MSPS include an INL of 1.5 LSB; DNL of 1 LSB, offset/gain of +/- 5 LSB and the signal to noise ratio of 71db.
The microcontrollers are specified for 3-V operation with a temperature range of -40 degrees C to +85 degrees C, +105 degrees C, and +125 degrees C. Packaging options range from a tiny 6 mm x 6 mm 40-lead CSP (chip-scale package) to an 80-pin LQFP.
About half of the devices will come in a tiny 6 by 6 mm chip scale package; several others will be a 9 by 9 mm CSP. The ADuC702X line is currently available sampling quantities with volume production slated to begin in October. Pricing per unit in 1,000 piece quantities starts at $4.55 for a device with 32 Kbytes of flash memory and goes up to $12.80 per device for the full-featured ADuC7026. A low cost QuickStart Development System is available at $249.
Packed into the ADuC7026 device are 62 Kbytes of flash,8 Kbypes of SRAM,one 12 channel,12 bit A/D, four 12 bit DACs, the three phase pulse-width modulator, all housed in an 80 lead LQFP. A similar device but with out the PWM and housed in a 6 by 6 mm 40 pin chip scale package is the ADuC7020. The 7026 is priced at $12.80 (1000 pieces) while the 7020 carries a price tag of $9.60 in the same quantity bracket.
Visit www.analog.com/ADuC702x for more information.
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