Date: 14/11/2011

8 High speed ADCs in single IC for medical imaging systems

Analog Devices Inc. has added four high-speed two octal- and two quad-channel ADC chips for use in medical imaging and communications applications. ADI says The AD9257 14-bit and AD9637 12-bit octal A/D converters each integrate eight A/D converters into one package and feature 40 percent lower power per channel than other discrete octal converters. Analog Devices also introduced the AD9253 14-bit and AD9633 12-bit quad A/D converters in 48-lead chip-scale packages that are more than 10 percent smaller than competing devices.

All of the new converters support the higher channel densities of MRI (magnetic resonance imaging) systems, medical ultrasound and other high-end imaging applications, such as industrial visual inspection systems and non-destructive ultrasound. The AD9253 14-bit and AD9633 12-bit quad A/D converters are offered in a non-magnetic package and can be used safely within the magnetic field of an MRI system. This allows the converters to be placed closer to the signal of interest, which can increase the quality of image resolution and image throughput while reducing the overall component count.

The new octal and quad A/D converters are also suited to MIMO-based (multiple-input, multiple-output) radios, 3G-infrastructure equipment and other wireless communications applications.

Key High Speed A/D Converter Features
Low ADC core power
Serial LVDS (ANSI-644, default)
Low power, reduced output swing option (similar IEEE 1596.3)
Data and frame clock outputs
Operates on a single 1.8-V power supply
650-MHz full-power analog bandwidth
2-V p-p input voltage range
Serial port control
Specified over the industrial temperature range of -40°C to +85°C

Price and Availability:Product Sample Availability Full Production Signal-to-Noise Ratio Sample Rates (MSPS) Price Each In 1,000 Quantities Packaging
AD9257 14-bit octal NOW Now 75.7 dBFS 65
40 $71.40
$46.65 64-lead LFCSP 9 mm x 9 mm
AD9637 12-bit octal Now Now 71.5 dBFS 80
40 $56.95
$40.46 64-lead LFCSP 9 mm x 9 mm
AD9253 14-bit quad Now Now 75.3 dBFS 125
105
80 $117
$100
$63 48-lead LFCSP 7 mm x 7 mm
AD9633 12-bit quad Now Now 71.8 dBFS 125
105
80 $68.51
$57.80
$44.20 48-lead LFCSP 7 mm x 7 mm


Find additional high-speed converters at http://www.analog.com/en/analog-to-digital-converters/products/index.html.