Analog Devices Launches Continuous-Time Sigma-Delta ADC Family

Analog Devices, Inc. (NYSE: ADI), the global leader in data converter technology, unveiled its continuous-time sigma-delta (CTSD) converter architecture for wireless infrastructure, medical and other high-performance equipment demanding uncompromised data resolution and wide bandwidth. The 16-bit, AD9261 and AD9262 CTSD converter, and the AD9267 CTSD modulator couple the industry’s lowest noise and high dynamic range with a bandwidth of up to 10 MHz.

Analog Devices AD9261, AD9262, and AD9267 Continuous-Time Sigma-Delta Analog-to-Digital Converters“Today’s electronics increasingly rely on data conversion to faithfully translate digital information to provide the images, voice, audio, video and other real-world content that defines the quality of the end-user experience,” said Susie Inouye, research director, Databeans Inc., a leading semiconductor research firm. “While other architectures have pushed the performance envelope by offering exceptional throughput, high dynamic range or excellent low-noise characteristics, continuous-time sigma-delta excels in all of these areas.”

The highly integrated CTSD architecture eliminates multiple discrete components at the system level, while simultaneously improving performance and simplifying product development.

The AD926x utilizes principles of over sampling, noise shaping and input characteristics unique to its architecture to achieve high levels of performance and ease of use. The quiet resistive input structure relaxes the requirements of the driver amplifier while the high order over-sampled continuous time loop filter attenuates out-of-band signals reducing the need for large baseband filters and other signal conditioning circuitry. The high dynamic range performance reduces or eliminates the need for automatic gain control in many applications. These features coupled with a wide input bandwidth simplify system design, reducing the overall system footprint and shortening time-to-market.

CT-SD ADCs Raise Performance Threshold
The 16-bit single and dual AD926x ADC family achieves industry leading performance with an unprecedented combination of 86-dB dynamic range for an input signal bandwidth of up to 10 MHz. The highly integrated AD9261 and AD9262 feature an on-chip PLL clock multiplier, decimation filters, and sample rate converters and provide flexible output data rates between 30 MSPS (mega-samples-per-second) and 160 MSPS. The AD9267, which features only the high-performance 640-MSPS modulator core and PLL clock multiplier, presents the high speed data directly to the output. This provides designers the flexibility to offload signal processing functions to an FPGA or other processor. The 150-mW per channel to 350-mW per channel power consumption of the new CTSD converters is matched to a range of communications and industrial applications, including emerging radio architectures, such as direct down conversion, where the dual AD9262 or AD9267 can be used to support multiple wireless carriers and standards simultaneously.

Pricing, Availability and Complementary Parts
The AD926x CTSD ADC family is sampling now and will be available in volume production in April 2009. Complementary ADI parts in the signal chain include the AD9520 clock generation and distribution integrated circuit and the high performance ADL5382 I-Q demodulator.

  • AD9262: 2.5MHz BW, Dual – $30 – 64-Lead LFCSP
  • AD9262-5: 5MHz BW, Dual – $37 – 64-Lead LFCSP
  • AD9262-10: 10MHz BW, Dual – $48 – 64-Lead LFCSP
  • AD9267: Modulator Only, Dual – $40 – 64-Lead LFCSP
  • AD9261-10: 10MHz BW, Single – $28 – 48-Lead LFCSP

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Data Converters: Bridging the Analog and Digital Worlds
More designers turn to Analog Devices than any other supplier for the high-performance conversion technology required to bridge the analog and digital worlds in today’s myriad electronic systems. With the industry’s leading portfolio of ADCs (analog-to-digital converters) and DACs (digital-to-analog converters), Analog Devices’ converter products feature the right combination of sampling rates, accuracy and reduced noise, power, price and package size required in industrial and instrumentation, medical equipment, automotive systems, communications infrastructure, and consumer electronics. Online evaluation tools help customers quickly validate, select, and design in the optimal data converters to reduce design complexity, development schedules, and bill-of-material costs.

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 over 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.