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. Applications * Medical imaging/ultrasound * Nondestructive testing (NDT) * 8 channels of LNA, VGA, AAF, ADC, and digital demodulator/decimator * Low power: 150 mW per channel, time gain compensation (TGC) mode, 40 MSPS 62.5 mW per channel, continuous wave (CW) mode; <30 mW in power-down mode * 10 mm × 10 mm, 144-ball CSPBGA * TGC channel input referred noise: 0.82 nV/√Hz, maximum gain * Flexible power-down modes * Fast recovery from low power standby mode: <2 μs * Low noise preamplifier (LNA) * Input referred noise: 0.78 nV/√Hz, gain = 21.6 dB * Programmable gain: 15.6 dB/17.9 dB/21.6 dB * 0.1 dB compression: 1000 mV p-p/750 mV p-p/450 mV p-p * Flexible active input impedance matching * Variable gain amplifier (VGA) * Attenuator range: 45 dB, linear-in-dB gain control * Postamplifier (PGA) gain: 21 dB/24 dB/27 dB/30 dB * See data sheet for additional features https://elecena.pl/product/17778574/octal-ultrasound-afe-with-digital-demodulator-jesd204b 2021-04-19 https://elecena.pl/product/17778574/octal-ultrasound-afe-with-digital-demodulator-jesd204b 2025-01-18