Octal Ultrasound AFE with JESD204B
Data Sheet
AD9675
FEATURES
GENERAL DESCRIPTION
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
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.
Fast recovery from low power standby mode: 2 μs
Low noise preamplifier (LNA)
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.
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)
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.
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
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.
APPLICATIONS
Medical imaging/ultrasound
Nondestructive testing (NDT)
Rev. A
Document Feedback
Information furnished by Analog Devices is believed to be accurate and reliable. However, no
responsibility is assumed by Analog Devices for its use, nor for any infringements of patents or other
rights of third parties that may result from its use. Specifications subject to change without notice. No
license is granted by implication or otherwise under any patent or patent rights of Analog Devices.
Trademarks and registeredtrademarks arethe property of their respective owners.
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
5秒后页面跳转
英伟达新AI芯片Rubin或提前半年亮相
苹果iPhone 17将全系采用三星/LG显示LTPO OLED面板
三星深化印度制造布局，供应链本地化进程加速
芯擎科技“星辰一号”自动驾驶芯片点亮成功，2025年量产在即
微信公众号
抖音公众号
浙公网安备 33010502006866号 浙ICP备10014259号-119
营业执照ICP证
数据手册
如果您发现信息不准确，
