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AD9675KBCZ Datasheet(PDF) 1 Page - Analog Devices |
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AD9675KBCZ Datasheet(HTML) 1 Page - Analog Devices |
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1 / 61 page  Octal Ultrasound AFE with JESD204B Data Sheet AD9675 Rev. A Document Feedback Information furnished by Analog Devices is believed to be accurate and reliable. However, no responsibilityis assumedbyAnalogDevicesforitsuse,norforanyinfringementsof patentsorother rightsofthirdpartiesthatmayresultfromitsuse.Specificationssubjecttochangewithoutnotice.No license is granted by implication or otherwise under any patent or patent rights of Analog Devices. Trademarksandregisteredtrademarksarethepropertyoftheirrespectiveowners. One Technology Way, P.O. Box 9106, Norwood, MA 02062-9106, U.S.A. Tel: 781.329.4700 ©2013–2016 Analog Devices, Inc. All rights reserved. Technical Support www.analog.com FEATURES 8 channels of LNA, VGA, AAF, ADC, and digital RF decimator Low power 150 mW per channel, TGC mode, 40 MSPS 62.5 mW per channel, CW mode 10 mm × 10 mm, 144-ball CSP_BGA 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, or 21.6 dB 0.1 dB compression: 1000 mV p-p, 750 mV p-p, or 450 mV p-p Flexible active input impedance matching Variable gain amplifier (VGA) Attenuator range: 45 dB, linear in dB gain control Postamp gain (PGA): 21 dB, 24 dB, 27 dB, or 30 dB Antialiasing filter (AAF) Programmable second-order low-pass filter (LPF) from 8 MHz to 18 MHz or 13.5 MHz to 30 MHz and high-pass filter (HPF) Analog-to-digital converter (ADC) SNR: 75 dB, 14 bits up to 125 MSPS JESD204B Subclass 0 coded serial digital outputs CW Doppler mode harmonic rejection I/Q demodulator Individual programmable phase rotation Dynamic range per channel: 160 dBFS/√Hz Close-in SNR: 156 dBc/√Hz, 1 kHz offset, −3 dBFS input RF digital decimation by 2 and high-pass filter APPLICATIONS Medical imaging/ultrasound Nondestructive testing (NDT) GENERAL DESCRIPTION The AD9675 is designed for low cost, low power, small size, and ease of use for medical ultrasound. It contains eight channels of a variable gain amplifier (VGA) with a low noise preamplifier (LNA), a continuous wave (CW) harmonic rejection I/Q demodulator with programmable phase rotation, an antialiasing filter (AAF), an analog-to-digital converter (ADC), and a digital high-pass filter and RF decimation by 2 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 termina- tion. 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 features 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. |
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