Octal Ultrasound AFE with Digital Demodulator, JESD204B
The AD9671 is designed for low cost, low power, small size, and ease of use for medical ultrasound applications. It contains eight channels of a VGA with an LNA, a CW harmonic rejection I/Q demodulator with programmable phase rotation, an AAF, an ADC, and a digital demodulator and decimator for data processing and bandwidth reduction.
Each channel features a maximum gain of up to 52 dB, a fully differential signal path, and an active input preamplifier termination. The channel is optimized for high dynamic performance and low power in applications where a small package size is critical.
The LNA has a single-ended to differential gain that is selectable through the serial port interface (SPI). Assuming a 15 MHz noise bandwidth (NBW) and a 21.6 dB LNA gain, the LNA input SNR is 94 dB. In CW Doppler mode, each LNA output drives an I/Q demodulator that has independently programmable phase rotation with 16 phase settings.
Power-down of individual channels is supported to increase battery life for portable applications. Standby mode allows quick power-up for power cycling. In CW Doppler operation, the VGA, AAF, and ADC are powered down. The ADC contains several features designed to maximize flexibility and minimize system cost, such as a programmable clock, data alignment, and programmable digital test pattern generation. The digital test patterns include built-in fixed patterns, built-in pseudorandom patterns, and custom user defined test patterns entered via the SPI.
- Medical imaging/ultrasound
- Nondestructive testing (NDT)
Recommended Clock Drivers
Recommended A/D Converter
- For sampling the I and Q signals in analog beamforming applications , we recommend the AD7982 .
Recommended Driver Amplifiers
JESD204 Serial Interface
The JESD204 and the JESD204B revision data converter serial interface standard was created through the JEDEC...
New Digital Demodulator and JESD204B Ultrasound Analog Front End Reduces...
FPGA Interoperability Reports
Validating ADI Converters Inter-operability with Xilinx FPGA and JESD204B IP
ADI has always placed the highest emphasis on delivering products that meet the maximum levels of quality and reliability. We achieve this by incorporating quality and reliability checks in every scope of product and process design, and in the manufacturing process as well. "Zero defects" for shipped products is always our goal.