Analog Devices' 16-BIT Data Converters Achieve Best-In-Class Signal-To-Noise Ratio And If Sampling Performance

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2006-05-30 09:41

NORWOOD, Mass--(뉴스와이어)--Analog Devices, Inc. (NYSE: ADI), the world leader in data converter technology, is expanding its portfolio of high-performance analog-to-digital converters (ADCs) with the introduction of two devices targeted for high-end instrumentation, medical and wireless communications applications that enable designers to maintain low noise and high dynamic range, even at high input frequencies. Designers of medical systems, such as magnetic resonance imaging and patient monitoring receivers, which involve complex, multi-channel designs will benefit from the new converters which offer the highest signal to noise ratio (SNR) at 79dB, and deliver 16-bit precision at high IFs (intermediate frequency) and supporting sampling rates up to 130 MSPS (mega samples per second). In addition to an internal buffer that isolates and eases driving of the ADC inputs, the new devices offer 15 percent lower jitter than existing solutions · an important factor in maintaining low system noise floors.

The new converters - the AD9460 and AD9461 - provide 16-bit performance up to 130 MSPS, enabling the high dynamic range required for signal analysis, radar, magnetic resonance imaging (MRI), and multi-carrier/multi-std wireless communications systems. In these designs, higher ADC sampling rates allow engineers to capture and digitize wider signal bandwidths and to handle higher Tesla magnetic fields for superior imaging in MRI. In addition, the AD9460 and AD9461 operate with lower power to aide in multi-channel systems. The AD9460, offered at 80 MSPS and 105 MSPS sampling rates, consumes 1.4 W and 1.6 W respectively. At its highest sampling rate of 130 MSPS, the AD9461 consumes 1.9 W.

“System designers are challenged with converter performance trade-offs in order to optimize their dynamic range, speed and power. For devices requiring very high image quality, for example, the need for high sampling rates for faster data capture while maintaining high accuracy and SNR can increase ADC power,” said Kevin Kattmann, product line director, high-speed signal processing, Analog Devices. “Leveraging the superior performance of our AD9446, we are able to deliver these higher sampling rate extensions to our 16-bit ADC family at significantly lower power dissipation. The AD9460 and AD9461 offer the wide bandwidth, high speed, exceptional linearity and low noise our customers have come to expect from the AD9446 family.”

About the AD9460 and AD9461

The AD9460 and AD9461 ADCs feature an 85dBFS noise floor, SNR of 79db and true 16-bit linearity (DNL = ±0.5 LSB). SFDR is superior at 92dB with an input frequency of 170MHz and 88dB with an input frequency of 250MHz. Both devices include an integrated input buffer to isolate the ADC input, eliminating the need for external buffering that can consume up to 1 W of power, thereby easing the driving of the ADC, whether driven by transformers or amplifiers.

When input amplifiers are required for signal amplification or single-ended to differential conversion, the AD8138 and AD8139 are ideal for driving the AD9460 and AD9461 at baseband (<100MHz) input frequencies, and the AD8352 serves as an excellent IF-Sampling (>100MHz) input amplifier. The flexible, 2-4Vpp input voltage range of the AD9460 and AD9461 allow designers to optimize SNR and SFDR depending on their sampling rate and input frequency.

The devices join a family of converters designed to deliver exceptional signal noise reduction, high resolution and fast sampling rates. The first device in the family, the AD9446, was introduced last May and released last October.

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 research and development investing 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 and instrumentation equipment, and medical electronics, as well as a host of other emerging market applications.

Pricing and Availability

The AD9460 and AD9461 ADCs are sampling now with production quantities available in March. Available in a Pb-free, 100-lead surface mount plastic package (100-lead TQFP/EP), the AD9460 is priced at $48.33 (80 MSPS) and $56.67 (105 MSPS), and the AD9461 (130 MSPS) is priced at $65.00, each in 1,000-unit quantities. For more information, please visit: www.analog.com/AD9460.

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