Analog Devices unveiled its octal ultrasound receiver with on-chip digital I/Q demodulation and decimation filtering, the AD9670. Because of the embedded demodulation and decimation feature, the AD9670 is able to condition eight channels of data from RF to a baseband frequency, reducing the processing load on the system FPGA by at least 50 percent.
The AD9670 also integrates a low-noise amplifier, variable gain amplifier, anti-aliasing filter, and a 14-bit A/D converter for enhanced ultrasound image quality. The design reduces the FPGA’s data bandwidth requirements, allowing designers to use less expensive processors or reallocate processing bandwidth to other system functions. The new receiver also 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.
