AD9671EBZ datasheet(1/61 Pages) AD

номер детали	AD9671EBZ

подробное описание детали	Octal Ultrasound AFE with Digital Demodulator

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JESD204B Octal Ultrasound AFE with

Digital Demodulator

Data Sheet

AD9671

Rev. A

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Tel: 781.329.4700

Technical Support

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FEATURES

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 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/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

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)

Signal-to-noise ratio (SNR): 75 dB, 14 bits up to 125 MSPS

JESD204B Subclass 0 coded serial digital outputs

CW Doppler (CWD) 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

Digital demodulator/decimator

I/Q demodulator with programmable oscillator

APPLICATIONS

Medical imaging/ultrasound

Nondestructive testing (NDT)

GENERAL DESCRIPTION

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.

Аналогичный номер детали - AD9671EBZ

производитель	номер детали	датащи	подробное описание детали
Analog Devices	AD9671EBZ	842Kb / 61P	Octal Ultrasound AFE with JESD204B 23-Feb-2017

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Аналогичное описание - AD9671EBZ

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