Norwood, MA -- Analog Devices Inc., a global provider in high-performance semiconductors for signal processing applications and the market leader in data converters, today introduced a 16-bit SAR (successive-approximation register) ADC (analog-to-digital converter) that provides design engineers with 50 percent more speed and more than twice the accuracy of competing products, all in packaging that is 40 percent smaller than the competition.
The new SAR converter, the AD7621, operates at 3 MSPS (mega samples per second) while providing one LSB (lease significant bit) INL (integral non-linearity) and DNL (differential non-linearity). In addition to delivering the highest combination of speed and accuracy, the AD7621 enables lower power consumption and better INL performance with no missing codes. The AD7621 also reduces the price per channel by allowing engineers to design systems that multiplex to a greater number of channels. A general purpose ADC, the AD7621 is suitable for applications for which resolution is a critical performance requirement, such as high-end data acquisition, CT scanners, spectrum analyzers, ATE (automatic test equipment) and general purpose test equipment.
The AD7621 joins Analog Devices' industry leading PulSAR family of SAR converters, which is based on an ADC architecture that provides the added advantage of zero data latency, a critical factor in data acquisition systems. SAR converters represent 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. Other PulSAR family converters include the AD7677, a 16-bit, 1 MSPS ADC, and the AD7674, an 18-bit, 800 kSPS (kilo samples per second) ADC.
"When designers are considering SAR converters, speed alone is not the only performance criteria," said Mike Britchfield, product line director, precision converters, Analog Devices. "Our competition has compromised accuracy for speed. With the AD7621 there are no compromises" for Analog Devices products, high-performance must mean speed and accuracy, combined with low power consumption, standard packaging and a competitive price."
The AD7621 is available in a 7 mm x 7 mm 48-lead LQFP (low profile quad flat pack) or a 7 mm x 7 mm 48-lead LFCSP (lead frame chip scale) package. True 16-bit accuracy provides clear imaging for scanner applications. The device features three different conversion rate modes to optimize performance for individual applications.
The AD7621 features low power consumption with typical power dissipation of 100 mW. It can be operated from a single 5-V supply and interfaced to either 5-V or 3.3-V digital logic. The SAR does not exhibit any pipeline delay, making it ideal for multiple multiplexed channel applications. The AD7621 offers designers 16 bits of no missing codes, SNR (signal-to-noise ratio) of 90dB, and pin-for-pin compatibility with the Analog Devices' AD7674, an 18-bit, 800 kSPS SAR ADC. The AD7621 features include an internal conversion clock, an internal reference buffer, error correction circuits and both serial and parallel interface ports. To bridge the gap for many high-performance data acquisition applications, the AD7621 can be paired with several of Analog Devices' operational amplifiers, including the AD8021, a custom-compensated amplifier that solves the gain/bandwidth performance challenge.
Analog Devices is a 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 8,450 people worldwide. It has manufacturing facilities in Massachusetts, California, North Carolina, Ireland, the Philippines and the United Kingdom.
Analog Devices, Inc., Ray Stata Technology Center, 804 Woburn Street, Wilmington, MA 01887. Tel: 800-ANALOGD (800-262-5643)