ADI unveil Octal Ultrasound receiver with JESD204B Serial Interface

The resulting savings addresses the needs of manufacturers designing small, high-performance ultrasound systems by simplifying ultrasound equipment board design while better meeting industry demand for higher data rates, larger channel counts and greater image resolution.



The AD9671 receiver conditions eight channels of data from RF to a baseband frequency, reducing the processing load on the system FPGA by at least 50 percent compared to other receivers. The AD9671 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 SNR 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.



“By introducing the first octal ultrasound receiver with a multi-gigabit, serial data link, we are enabling ultrasound equipment designers to shrink the number of interconnects between their data converters and FPGAs,” said Pat O’Doherty, vice president, Healthcare segment, Analog Devices. “By incorporating the JESD204B serial interface, the AD9671 receiver not only simplifies PCB design and debug, it allows manufacturers to continue lowering design costs and reducing system size while maintaining excellent overall system performance.”



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AD9671 Octal Ultrasound Receiver with Digital I/Q Demodulation

As with ADI’s recently released AD9670 octal ultrasound receiver, the AD9671 integrates a digital I/Q demodulator, programmable-oscillator and 16-tap FIR decimation filter to reduce FPGA data bandwidth requirements, while additionally combining multiple channels into a single CML data lane. The AD9671 provides a continuous wave 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.



AD9671 Octal Ultrasound Receiver Key Features

• 5-Gbps serial JESD204B CML interface

• Digital I/Q demodulator with programmable oscillator

• FIR decimation filter

o 16 taps per decimation factor

o Maximum decimation of 32

• 14-bit, 125-MSPS A/D converter

o SNR: 75 dB

• 8-channel LNA, VGA, AAF, ADC

• Low power:

o 130-mW/channel @ 40 MSPS in TGC mode

o 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 AD9671 octal receiver with integrated digital demodulation and decimation filtering is pin-similar to ADI’s AD9670 octal receivers, allowing designers to migrate cart-based and portable ultrasound equipment designs using a common PCB board layout.



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