Ultrasound System Design with Low Power Receiver ICs
Wed, 01/05/2011 - 11:06am
Analog Devices, Inc. has launched the fourth generation of its award-winning octal (eight-channel) ultrasound receivers with the introduction of two new ICs that reduce system size, complexity, and power consumption for high-end, mid-range, and portable ultrasound systems. The new AD9278 and AD9279 receiver chips each integrate ADI's world-leading data conversion technology for low noise TGC (time-gain-control) mode performance while providing high dynamic range I/Q demodulators that reduce the power and area for implementation of CW (continuous wave) Doppler processing. The new octal ultrasound receivers provide the highest available output-referred large-signal SNR ? up to 67 dB ? enabling improved sensitivity in diagnostic ultrasound systems while reducing board space up to 40 percent. The AD9278 octal ultrasound receiver is designed for portable ultrasound systems while the AD9279 octal ultrasound receiver is suitable for high-end and mid-range systems. The devices are pin- and package-compatible with each other and allow designers to use a common PCB (printed circuit board) layout that can be leveraged across multiple ultrasound platforms to save development time and cost. The new AD9278 and AD9279 octal ultrasound receivers feature a variable gain range of 45 dB, a fully differential signal path, an active input preamplifier termination, a maximum gain of up to 52 dB, and an ADC (analog-to-digital converter) with a conversion rate of up to 80 MSPS. Each device is optimized for dynamic performance and low-power operation in applications where a small package size is critical.