July 26, 2012 – Analog Devices ( www.analog.com , NASDAQ: ADI), a global leader in high-performance signal processing technology and data converters, today unveiled the industry's first 8-channel ultrasonic receiver with integrated on-chip digital I/Q demodulation and decimation filtering capabilities. ADI's AD9670 is the first ultrasonic receiver capable of conditioning eight channels of data from RF to baseband frequencies by integrating demodulation and decimation functions, reducing the processing load on the system FPGA (Field-Programmable Gate Array) by more than 50% compared to competitor receivers. In addition, the AD9670 integrates a low-noise amplifier (LNA), variable gain amplifier (VGA), anti-aliasing filter (AAF), and 14-bit A/D converter (ADC), and delivers improved ultrasound image quality by providing the industry's best sample rate (125 MSPS) and best signal-to-noise ratio (SNR) performance (75 dB). The new 8-channel receiver is the latest addition to Analog Devices' award-winning receiver portfolio and is designed for mid-range and high-end portable and cart-mounted ultrasound systems.

The digital I/Q demodulator, programmable oscillator, and 16-tap FIR (Finite-Impulse Response) decimation filter integrated into the AD9670 reduce the FPGA's data bandwidth requirements, allowing designers to replace the processor with a less expensive product or reallocate processing bandwidth to other system functions. Additionally, the new receiver provides a continuous wave (CW) processing path to the analog I/Q demodulator, which removes up to the 13th harmonic, enabling designers to reduce the number of filter components, thereby lowering system costs and design complexity while increasing signal sensitivity. The dynamic range of the CW mode output is 160 dBc/√Hz or more per channel.

In addition, the AD9670 8-channel receiver supports a 30 MHz anti-aliasing filter frequency and a 125 MSPS A/D converter sample rate, achieving 3 dB higher SNR performance than competitor products. This 14-bit A/D converter provides a programmable clock, data alignment, and programmable digital test pattern generation as well as fixed and pseudo-random patterns input via the serial port interface, along with custom user-defined test patterns as standard. The total power is 130mW per channel, and the 8-channel low-noise amplifier reduces the input referred noise to an average level of 0.78nV/√Hz at 5MHz (gain = 21.3dB).

“With the launch of the first 8-channel ultrasound receiver featuring digital demodulation and decimation filtering capabilities, we have been able to minimize data I/O and processing speeds and reduce the burden on system processors,” said Pat O’Doherty, Vice President of Medical at Analog Devices. “At the same time, by expanding the frequency range of anti-aliasing filters and maintaining high sample rates of A/D converters, ADI continues to support the efforts of ultrasound equipment manufacturers in the medical and industrial sectors to meet higher frequency probes and superior image quality requirements.”

AD9670 8-Channel Ultrasonic Receiver Key Specifications
• Digital I/Q demodulator with integrated programmable oscillator
• FIR Decimation Filter
o 16 tabs per decimation item
o Max Decimation 32
• 14-bit 125MSPS A/D converter
o SNR: 75dB
• 8-channel LNA, VGA, AAF, ADC
• Low power:
o 130mW per channel (@40MSPS) in TGC (Time Gain Compensation) mode
o 55mW per channel in CW mode
• Noise: Average 0.78 nV/√Hz at 5 MHz (Gain = 21.3 dB),
• Removal of harmonics up to the 13th order from CW Doppler signals

Supply, Price, and Complementary Parts
Product Sample Supply Mass Production Supply Price per 1,000 Units Package
AD9670
August 2012 October 2012 69.00 Dollar 144-Ball 10mm × 10mm,
BGA

The AD9670 8-channel receiver, which integrates digital demodulation and decimation filtering functions, has pins similar to ADI's AD9278 and AD9279 8-channel receivers, allowing designers to easily upgrade cart-type and portable ultrasound equipment designs using common PCB board layouts.

• Download datasheet and check product information: http://www.analog.com/AD9670
• Order samples and evaluation boards: http://www.analog.com/AD9670
• Check out more information on ultrasound and medical imaging applications: http://healthcare.analog.com/en/imaging/segment/health.html