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The industry’s first single-chip, dual 14-bit A/D converter

Norwood, MA — Analog Devices, a global provider of high-performance semiconductors for signal-processing applications and world's leader in data conversion technology, today introduced the industry's first 14-bit dual analog-to-digital converter (ADC), integrating two 14-bit ADCs on a single chip.

This innovative IC is the flagship device in a new family of high-speed dual ADCs from Analog Devices offered in a range of resolutions and speeds. Housed in space-saving 9 mm x 9 mm chip-scale packages (CSP), the pin-compatible family provides resolutions of 10-, 12-, and 14-bits at speeds of 20 to 105 MSPS (mega samples per second). Their unique combination of high speed, high resolution, and compact packaging allows design engineers to use only one chip to achieve the performance of multiple high-speed converters. The dual ADCs are ideal for applications that require multiple ADC channels to transfer data at very high speeds, such as 3G wireless base stations, high-end medical and defense imaging systems, and satellite communications.

The new family of dual ADCs in CSP packaging includes the following ICs:
— 14-bit dual ADC: The AD9248 is the industry's first 14-bit dual ADC supporting speeds of 20 MSPS to 65 MSPS with a low power consumption of 300 mW per channel at 65 MSPS;
— 12-bit dual ADC: The AD9238 is a 12-bit dual ADC offering speeds of 20 MSPS to 65 MSPS, and consuming a low 300 mW per channel at 65 MSPS; and
— 10-bit dual ADC: The AD9216 is a 10-bit dual ADC with speed grades ranging from 65 MSPS to 105MSPS. At 105MSPS, this ADC consumes 150 mW per channel.

Base Stations
Today's 3G wireless base stations manufacturers are looking to deploy cost effective single- and multi-carrier direct conversion radio architectures. They also seek main/diversity IF sampling architectures to enable them to expand coverage with macrocell, microcell, and picocell units. These base stations often require conversion speeds over 60 MSPS. With 12- and 14-bit resolutions operating up to 65 MSPS, the AD9238 and AD9248 are ideal for creating high-performance receiver solutions that match channel performance and channel isolation while conserving radio card space.

High-Resolution Imaging Systems
At the lower end of their sample-rate spectrum, the AD9238 and AD9248 are well suited to high-resolution imaging systems requiring sample speeds of 20 MSPS, such as night-vision systems, and some medical imaging systems. To deliver the finest imagery, these systems often use multiple ADCs, therefore low power and a small footprint are critical to ensuring performance while keeping system costs low.


Satellite Communications
For applications requiring sample rates of 105 MSPS, such as radio point-to-point/cellular backhaul systems and satellite communications, the 10-bit AD9216 provides the most cost-efficient solution. These systems, which are built on custom versions of QPSK (quadrature phase shift keying) or up to 256 QAM (quadrature amplitude modulation), use lower levels of modulation than base stations and therefore require a higher sampling rate to accommodate the high data rates traveling between point-to-point antennae.

For a complete listing of Analog Devices' ADCs available in chip-scale packaging, please visit: http://www.analog.com/csp.

Dual ADCs
The AD9248, AD9238 and AD9216 ADCs feature dual high-performance sample-and-hold amplifiers (SHA) and an integrated voltage reference. They use a multistage differential pipelined architecture with output error correction logic to provide 10-, 12- and 14-bit accuracy, and guarantee no missing codes over the full operating temperature range (-40 degrees C to +85 degrees C) at up to the specified sample rate.

The wide bandwidth, differential SHA allows for a variety of user selectable input ranges and offsets, including single-ended applications. They are suitable for various applications including multiplexed systems that switch full-scale voltage levels in successive channels and for sampling inputs at frequencies well beyond the Nyquist rate (one-half the sample rate).

The AD9248, AD9238 and AD9216 are sampling now with production quantities available in September 2004. Pricing for the AD9216, AD9238 and AD9248 begins at $9.25, $13.15 and $22.95, respectively, in 1,000-piece quantities for the slowest speed grades.

Analog Devices, Inc., 804 Woburn Street, Wilmington, MA 01887. Tel: 1-800-ANALOGD (1-800-262-5643)

AD9248 data sheet
AD9238 data sheet
AD9216 data sheet

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