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Ultrasound receivers maximize image quality, reduce power consumption

Norwood, Mass. — Analog Devices, Inc. has introduced two eight-channel (octal) ultrasound receivers that maximize image quality and reduce power consumption in cart-based and battery-powered portable ultrasound equipment.

The AD9272 claims the industry's lowest terminated noise for high- and mid-end cart-based ultrasound equipment that require high image quality, and the AD9273 is reportedly the most power-efficient device in its class for addressing the requirements of portable ultrasound systems.

The AD927x offerings replace previous discrete solutions with a single integrated circuit that combines eight channels, each comprising a low-noise amplifier (LNA), a variable-gain amplifier (VGA), an anti-aliasing filter (AAF) and a 12-bit analog-to-digital converter (ADC).

The AD9272 claims the industry's lowest input referred noise (0.75 nV/rtHz at 5 MHz typical) when operating under real world conditions and 6 dB/rtHz better input dynamic range than competing devices. For portable ultrasound equipment, the AD9273 touts industry leading power dissipation of less than 100 mW per channel at 12-bits and 40 million samples per second (MSPS), which extends portable ultrasound battery life.

Both the AD9272 and AD9273 feature a variable gain range of up to 42 dB, a selection of anti-aliasing filter options, and pin-compatibility with other products in the ADI family. The AD9272 contains an ADC with a conversion rate of up to 80 MSPS; and the AD9273 includes an ADC with a conversion rate of up to 50 MSPS. The AD9271 features a variable gain range of 30 dB and includes an ADC with a conversion rate of up to 50 MSPS.

The devices in the AD927x family provide medical equipment designers with the flexibility to scale power and performance for different imaging modes. Both the AD9272 and AD9273 feature a serial port interface (SPI) that allows designers to further customize the noise and power performance for any given imaging mode, probe, or power requirement. By changing SPI registers, designers can optimize an ultrasound signal processing architecture for the best possible noise performance or longest battery life, ADI said.

Pricing: The AD9272 is priced at $54.00 per unit and the AD9273 is priced at $51.00 per unit, in quantities of 1,000.
Availability: The AD9272 and AD9273 are sampling now. Both products come in a 100-lead TQFP (thin quad flat package). Evaluation platforms are available for both devices.
Product information: AD9272 and AD9273

Analog Devices , www.analog.com

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