Industry’s First Octal Ultrasound Receiver with Digital I/Q Demodulator and … – SYS

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Devices, Inc.
(NASDAQ: ADI), the leading provider of data-conversion
technology and longtime collaborator with the medical imaging industry,
today introduced the industry’s first octal (eight-channel) ultrasound
receiver with on-chip digital I/Q demodulation and decimation filtering.
Because of the embedded demodulation and decimation feature, ADI’s
AD9670 is the first ultrasound receiver able to condition eight channels
of data from RF to a baseband frequency, reducing the processing load on
the system FPGA (field-programmable gate array) by at least 50 percent
compared to other receivers. The AD9670 also integrates a low-noise
amplifier, variable gain amplifier, anti-aliasing filter, and a 14-bit,
A/D converter with the industry’s highest sample rate (125 MSPS) and
best SNR (signal-to-noise ratio) performance (75 dB) for enhanced
ultrasound image quality. The new octal receiver is the latest addition
to Analog Devices’ award winning ultrasound receiver portfolio and is
designed for mid- to high-end portable and cart-based ultrasound systems.

Octal ultrasound receiver with digital I/Q demodulator and decimation filter captures and conditions ultrasound RF signals to ease FPGA processing burden in cart-based and portable ultrasound equipment. (Graphic: Business Wire)

The integrated digital I/Q demodulator, programmable-oscillator and
16-tap FIR (finite-impulse response) decimation filter of the AD9670
reduce the FPGA’s data bandwidth requirements, allowing designers to use
less expensive processors or reallocate processing bandwidth to other
system functions. The new receiver also provides a continuous wave (CW)
processing path with an analog I/Q demodulator that has harmonic
rejection to the 13th order, which allows designers to reduce the number
of filter components to lower system cost, reduce design complexity, and
improve signal sensitivity. The CW-mode output dynamic range is more
than 160 dBc/ √Hz per channel.

Additionally, the AD9670 octal receiver’s 30-MHz anti-aliasing filter
frequency and 125-MSPS A/D converter sample rate combine to yield SNR
performance that is 3-dB higher than competing devices. The 14-bit A/D
converter also features a programmable clock, data alignment, and
programmable digital test pattern generation, including built-in fixed
and pseudo random patterns and custom user-defined test patterns,
entered via a serial port interface. Total power is 130-mW per channel,
while an eight-channel low-noise amplifier reduces input-referred noise
to just 0.78 nV/√Hz typical at 5 MHz (gain = 21.3 dB).

“By introducing the first octal ultrasound receiver with digital
demodulation and decimation filtering, we are able to minimize the data
I/O and throughput rates and place less stress on the system processor,”
said Pat O’Doherty, vice president, healthcare segment, Analog Devices.
“At the same time, by extending the anti-aliasing filter frequency range
and maintaining a high A/D converter sample rate, we are continuing to
help medical and industrial ultrasound equipment manufacturers meet the
trend toward higher frequency probes and superior image quality.”

AD9670 Octal Ultrasound Receiver Key Features

  • Digital I/Q demodulator with programmable oscillator
  • FIR decimation filter

    • 16 taps per decimation factor
    • Maximum decimation of 32
  • 14-bit, 125-MSPS A/D converter

    • SNR: 75 dB
  • 8-channel LNA, VGA, AAF, ADC
  • Low power:

    • 130-mW/channel @ 40 MSPS in TGC (time gain compensation) mode
    • 55 mW/channel in CW mode
  • Noise: 0.78 nV/√Hz typical at 5 MHz (gain = 21.3 dB)
  • Harmonic rejection to 13th order on CW-Doppler signals

Availability, Pricing and Complementary Components

The AD9670 octal receiver with integrated digital demodulation and
decimation filtering is pin-similar to ADI’s AD9278 and AD9279 octal
receivers, allowing designers to upgrade cart-based and portable
ultrasound equipment designs using a common PCB board layout.









Full Production




Price each
per 1k units









August 2012




October 2012








144-ball 10 mm x 10 mm BGA













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. Analog Devices
is headquartered in Norwood, Massachusetts, with design and
manufacturing facilities throughout the world. Analog Devices is
included in the SP 500 Index.

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About the Author:

Paul Khunkhun, serving Southern California since 1998. Paul is the owner of MDIS. He is a Board Certified Ultrasound Sonographer with RDCS and RVT credentialing. He is also pending ICAEL accreditation.

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