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Receivers integrate features for Doppler processing

Posted: 16 Apr 2009 ?? ?Print Version ?Bookmark and Share

Keywords:receiver ultrasound? processing Doppler? integration?

Analog Devices Inc. has introduced the third generation of its octal (eight-channel) ultrasound receivers. Designed for continuous wave (CW) as well as pulse wave (PW) Doppler ultrasound, the AD9276 and AD9277 octal ultrasound receivers integrate gain, filtering, data conversion and demodulation for CW Doppler signal processing on a single chip.

ADI's octal ultrasound receivers allow system designers to provide CW Doppler capabilities while reducing system size, complexity, and power consumption for mid- and high-end cart-based ultrasound systems. The AD9276 and AD9277 octal ultrasound receivers consume 90mW per channel when processing signals in CW Doppler mode and require 80 percent less board space than competing ultrasound receiver subsystems, according to ADI.

The AD9276 octal ultrasound receiver combines an eight-channel variable-gain amplifier (VGA) with LNA, anti-aliasing filters and a 12bit 80MSps ADC. The AD9277 octal ultrasound receiver features the same level of integration but incorporates a 14bit 50MSps ADC.

According to ADI, these two octal receivers provide the industry's lowest input-referred noise (0.75nV/rt-Hz @ 5MHz typical) when operating under real-world conditions and 6dB/rt-Hz better input dynamic range than competing devices. The AD9276 dissipates 190mW per channel at 12bits and 40MSps, while the AD9277 dissipates 190mW per channel at 14bits and 40MSps.

In a 100-lead TQFP and in 1,000-piece quantities, the AD9276 is $62, and the AD9277 is $68. The devices are sampling now, with volume production scheduled for June 2009.

- Ismini Scouras

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