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ADI's 16bit, 125MSPS ADC touts high dynamic range

Posted: 22 May 2012     Print Version  Bookmark and Share

Keywords:A/D  converter  medical imaging 

Analog Devices Inc. releases the AD9653, a 4-channel high-speed A/D converter designed for medical imaging and communications applications where the combination of high channel density, low power and small size provide systems engineers with greater design flexibility and lower per-channel cost for data conversion.

The AD9653 16bit quad A/D converter joins previously-released 12bit and 14bit versions to form a pin-compatible, power- and size-optimised series of high-speed converter products.

The AD9653 supports 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. It is offered in a non-magnetic package and can be used safely within the magnetic field of an MRI system. This allows the converter to be placed closer to the signal of interest, which can increase the image quality and throughput while reducing the overall component count.

Complementary components for the AD9653 in MRI applications include the ADL5202 variable gain, wide bandwidth amplifier, and the ADA4937 or ADL5562 ultra-low-distortion differential A/D converter driver.

The AD9653 is also said to be well-suited to MIMO- (multiple-input, multiple-output) based radios, 3G infrastructure equipment and other wireless communications applications. Its small package size, low power dissipation, and power-scaling functionality are claimed as ideal for femto and pico-cell basestation designs.

Complementary components for this high-speed converter in communications applications include the ADL5202 variable gain, wide bandwidth amplifier, AD8376 ultra-low distortion IF dual VGA and ADA4937 ultra-low distortion differential A/D converter driver.

For low jitter performance in all applications, the AD9510, AD9511, AD9512, AD9513, AD9514, and AD9515 clock distribution ICs, or the AD9516 or AD9517 family of multiple output clock generators are recommended.

The AD9653 delivers 164mW per channel at 125MSPS with scalable power option and a high dynamic range e.g. SNR = 76.5dBFS @ 70MHz (VREF = 1V), SNR = 77.5dBFS @ 70MHz (VREF = 1.3V) and SFDR = 90dBc (to Nyquist).

The device also offers a 650MHz full power analogue bandwidth and has a serial LVDS digital output (ANSI-644 or reduced power mode similar to IEEE-1596.3). The device is packaged in a 7mm x 7mm, 48-pin LFCSP.

The AD9653-125 is available now for sampling and is packaged in a PB-free 48-pin LFCSP non-magnetic package. Pricing each in a 1,000 quantities is Rs.13,089.01 ($250).

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