A/D Converters feature software-selectable input ranges.

Press Release Summary:

Addressing industrial data conversion needs, PulSAR® ADCs include 16-bit AD761x series and 18-bit AD763x series. Analog input ranges are software-selectable across unipolar and bipolar input ranges. Along with error correction circuits, ADCs feature serial and parallel interfaces as well as internal registers that enable flexible switching from input voltage ranges on-the-fly, with zero data latency. Sampling rates range from 250-670 kS/sec to 250-750 kS/sec.

Original Press Release:

Analog Devices Introduces Precision ADCs With Software Selectable Input Ranges to Ease Industrial Design Challenges

Norwood, MA(10/10/2005) - Analog Devices Inc. (NYSE: ADI), a global leader in high-performance semiconductors for signal processing applications and the world leader in data conversion technology, today introduced a new generation of 16-bit and 18-bit PulSAR® analog-to-digital converters (ADCs) that address the industrial customer's need for more efficient and cost-effective data conversion, while reducing design complexity and setting new standards for performance. SAR (successive-approximation register) converters comprise the majority of the ADC market and are often the most cost-effective technology for applications that require very precise digital modeling of analog signals, such as data acquisition, and process control systems used in factory automation.

Featuring software selectable analog input ranges across multiple selections of unipolar and bipolar ranges, the new ADCs eliminate the need for expensive level shifting and gain stages in front-end analog circuitry, resulting in a dramatic reduction in component costs and board space requirements. Using the ADCs' internal registers, designers have the flexibility of switching from four different input voltage ranges 'on the fly' - with zero data latency. Clocking at speeds up to 750 kSPS, devices in the 16-bit AD761x series offer up to a 6-fold improvement in sampling rate performance over existing programmable ADCs, while the AD763x ADCs allow more precise signal conversion at 18 bits of resolution. The combination of functionality, performance and a 50 percent smaller footprint available at half the price of competing products is unprecedented in a SAR ADC.

Data acquisition systems have traditionally relied on level-shifting and gain stages to accommodate various bipolar and unipolar analog input ranges that are required by OEM customers. This front-end signal conditioning method includes "boot-strapping" or register-controlled programming, which is a time consuming and costly approach. By leveraging ADI's patented iCMOS(TM) industrial process technology, the new AD761x and AD763x PulSAR ADCs allow for the selection of unipolar input voltage ranges of 0 to 5 V and 0 to 10 V, and bipolar input voltage ranges of +/-5 V and +/-10 V.

"In data conversion, innovating for greater efficiency can be just as important as performance, and the new ADCs deliver greater value to our customers by innovating where it means the most for designers of industrial applications," said Mike Britchfield, product line director, Precision Signal Processing group, Analog Devices. "The devices were designed to address the challenges of industrial electrical environments where efficiency, size and cost are critical factors, while also passing along a lower cost of ownership."

More about the AD761x and AD763x PulSAR ADCs
The AD761x and AD763x join Analog Devices' industry leading PulSAR family of SAR converters, an ADC architecture that provides the added advantage of zero data latency, a critical factor in data acquisition systems. The AD761x series provide fast sampling rates at 250 kSPS to 750 kSPS combined with the high accuracy of 2.0-LSB typical integral nonlinearity (INL). With 18-bit accuracy, the AD763x series offers the highest precision in a software programmable ADC, with sampling rates of 250 kSPS to 670 kSPS and 2.5-LSB typical INL. The devices have very low power consumption featuring 75mW at 500ksps.

Both the AD761x and AD763x integrate a complete range of analog functions on-chip, including an internal 2.5 V reference, an internal conversion clock, error correction circuits, and both serial and parallel interfaces. The ADCs are pin-compatible with other parts within their respective series.

The 16-bit AD761x PulSAR ADCs can be coupled with ADI's new ADR12x low power voltage references, which offer the highest accuracy over the extended industrial temperature range of -40 to +125 degrees C, within a tiny TSOT-23 package.

Availability and Pricing
Both the new 16-bit PulSAR ADC series (AD7610 and AD7612) and the 18-bit PulSAR ADC series (AD7631 and AD7634) are sampling now, with full production slated for December 2005. The 16-bit devices are available at prices starting at $12.90 per unit for the AD7610; and the 18-bit devices are available at prices starting at $25.10 per unit for the AD7631, in 1,000-piece quantities. Both series of devices are available in 48 lead LQFP (leaded quad flat pack) and 48-lead LFCSP (lead frame chip-scale package) packaging.

Analog Devices in Industrial
Analog Devices has a 40-year heritage of working in concert with its customers in the industrial manufacturing industry to define, develop and deploy complete signal chain solutions that are optimized for their applications. ADI's legacy of supporting the industrial sector's long product life cycles with multi-year manufacturing commitments is augmented by the company's educated sales force, knowledgeable field applications engineers and advanced design support tools that include evaluation boards and SPICE models.

ADI's Data Conversion Technology: Critical Bridge Between Analog and Digital
Analog Devices is the world leader in data conversion technology. ADI's longstanding leadership in data conversion technology stems from an engineering culture that emphasizes deep understanding of the customer's system challenge, aggressive R&D investment, and unmatched mixed-signal design expertise. From application-specific solutions designed to lower system cost to the broadest selection of speed, accuracy, size and power consumption in DACs and ADCs, Analog Devices provides the products, technology, and support customers need to successfully bridge between real-world analog signals and the digital world of electronic equipment. ADI's data converters are used widely in consumer electronics, broadband and wireless communications, automotive systems, industrial equipment, and medical electronics, as well as a host of other emerging market applications.

About Analog Devices
Innovation, performance, and excellence are the cultural pillars on which Analog Devices has built one of the longest standing, highest growth companies within the technology sector. Acknowledged industry-wide as the world leader in data conversion and signal conditioning technology, Analog Devices serves over 60,000 customers, representing virtually all types of electronic equipment. Celebrating 40 years as a leading global manufacturer of high-performance integrated circuits used in analog and digital signal processing applications, Analog Devices is headquartered in Norwood, Massachusetts, with design and manufacturing facilities throughout the world. Analog Devices' common stock is listed on the New York Stock Exchange under the ticker "ADI" and is included in the S&P 500 Index.

PulSAR is a registered trademark and iCMOS is a trademark of Analog Devices Inc.

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