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Analog Devices' Unveils 24-Bit MicroConverter Data-Acquisition and Processing System-on-a-chip.

Business Editors/High-Tech Writers

NORWOOD, Mass.--(BUSINESS WIRE)--May 29, 2003

Industrial and instrumentation applications benefit from superior analog precision technology and faster microcontroller core

Analog Devices, Inc. (NYSE: ADI), a global leader in high-performance semiconductors for signal processing applications, today introduced a new MicroConverter(R) data-acquisition and processing system. MicroConverters integrate ADI's precision data converters with programmable microcontrollers and flash memory, providing the solutions designers need for the precise measurement of wide-dynamic-range low-frequency signals. The new ADuC845 features two 24-bit sigma-delta analog-to-digital converters (ADCs) with 10 single-ended or 5 fully differential channels on a single chip. This superior analog precision technology is integrated with a fast, programmable 8-bit, single-cycle, 8052 flash microcontroller (MCU) with more processing capability (up to 12 MIPS) than ADI's earlier offerings. This new device eliminates design complexity, while maintaining extremely low noise performance, which is critical for precision instrumentation applications.

Analog Devices' ADuC845, joins the company's extensive MicroConverter family of user-programmable, system-on-chip integrated circuits (ICs), designed for high-performance signal processing in industrial and instrumentation applications. To learn more about ADI's MicroConverters, please visit

"Customers designing precision measurement instruments are increasingly demanding multichannel low-noise data acquisition systems while using less board space," said Mike Britchfield, product line director for Precision Converters, Analog Devices. "Drawing on our deep analog experience, we've developed analog circuitry that integrates precision data converters with programmable microcontrollers. As a result, Analog Devices' new MicroConverters provide the solution these designers need for the precise measurement of wide dynamic range low-frequency signals."

About the ADuC845

The ADuC845 contains dual sigma-delta ADCs, primary and auxiliary, which are specified to 24-bit resolution and embedded with a single-cycle 8052 Flash MCU. The ADC throughput rate is 1.3KHz (max). The on-chip code flash/EE memory space allows for in-circuit re-programmability while the separate data memory space provides a nonvolatile read/write block with security enhancements.

Another key feature of the part is the Analog Devices-patented high-frequency "chopping" scheme that is implemented on both the primary and auxiliary ADCs, resulting in excellent dc offset and offset drift specifications. The new approach is extremely beneficial in applications where low drift, noise rejection and optimum electromagnetic interference rejection are important.

In addition to the two ADCs, the ADuC845 also contains a 10-channel (or 5 fully differential channels) input multiplexer to facilitate multiple-channel systems while maintaining the ADCs' high effective number of bits of resolution (ENOB). The device includes a temperature sensor, a programmable gain amplifier (PGA) on the primary ADC to allow direct measurement of low-level signals, a 12-bit voltage output DAC, dual PWM outputs, two current sources, a reference, an oscillator and PLL which generates the 12.58MHz clock from a 32kHz crystal and UART, SPI and I2C communications ports.

For simpler applications, a lower-cost version of the ADuC845, the ADuC847, eliminates the second ADC and the DAC, and thus does not perform simultaneous A/D conversion and control via the DAC.

The devices are ideally suited for applications that require precise measurement of wide dynamic range low-frequency signals in industrial and instrumentation applications such as intelligent sensors, temperature/pressure transducers, 4-20mA control loops, and patient monitors.

Pricing and Availability

The ADuC845 and ADuC847 will be sampling in July and will be available in October 2003. The parts come in two packaging options: a 52-pin PQFP (plastic quad flat pack) package for traditional users and a small (8 mm x 8 mm) 56-lead CSP (chip-scale package) for space-constrained users. These MicroConverters also come in three memory options that include 62-, 32-, and 8-kbyte Flash code space. The ADuC845 is priced at $13.16, $14.83 and $16.68 in 1,000-piece quantities for the three memory options, respectively. The ADuC847 is priced at $9.42, $11.26, and $12.98 in 1,000-piece quantities, respectively. For more information, please visit and .

About Analog Devices

Analog Devices is a leading manufacturer of precision high-performance integrated circuits used in analog and digital signal processing applications. The company is headquartered in Norwood, Massachusetts, and employs approximately 8,600 people worldwide. It has manufacturing facilities in Massachusetts, California, North Carolina, Ireland, the Philippines and the United Kingdom. Analog Devices' stock is listed on the New York Stock Exchange and the company is included in the S&P 500 Index.

MicroConverter(R) is a registered trademark of Analog Devices, Inc.
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Publication:Business Wire
Geographic Code:1USA
Date:May 29, 2003
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