AD927x/AD967x Octal Ultrasound Analog Front End (AFE) Product Family for High Performance Cart-Based and Portable Ultrasound Systems Ultrasound designs and the associated requirements have evolved over the years to meet increasingly complex diagnostic needs, ranging from routine prenatal care to advanced cardiac imaging. To meet new and varied demands, Analog Devices’ AD927x/AD967x family of octal ultrasound receivers offers a range of features and functionality that maximize image quality and performance, while minimizing power dissipation and system cost. Features and Functionality CW I/Q Demodulator Used to measure the speed and direction of blood flow, CW Doppler processing provides physicians and sonographers with a measurement technique to diagnose vascular conditions, such as faulty valves and arteries in the heart. The AD927x/AD967x family offers models that provide CW I/Q demodulation and individual programmable phase rotation supporting exceptional levels of performance while reducing the need for filter components. A CW I/Q demodulator reduces system cost, complexity, and power consumption. Digital I/Q Demodulator and FIR Decimation Filter An on-chip digital demodulator and decimator conditions eight channels of data from RF to a baseband frequency, reducing the processing load on the system FPGA (field-programmable gate array). RF Decimator An on-chip RF decimator enables the ADC to be oversampled, providing an increased signal-to-noise ratio (SNR) for improved image quality while maintaining a lower data I/O rate to system processors. JESD204B Serial Interface Several models in the product family have a 5 Gbps JESD204B data conversion serial interface to support higher data rates and channel counts, while reducing ultrasound system I/O data routing by as much as 80% compared to other data interface standards. The resultant savings addresses the design needs of small, high performance ultrasound systems. The ultrasound equipment board design is simplified while better meeting the industry’s demands for higher data rates, larger channel counts, and greater image resolution. www.analog.com/healthcare Product Highlights Low Noise Excellent input- and output-referred noise enables improved system sensitivity for high performance applications. Low Power The power dissipation enables compact designs with a long battery life and low heat dissipation. The portfolio offers several models that support high end systems with small form factors at 130 mW per channel at 12 bits, 40 MSPS, and 50 mW per channel in CW Doppler mode; several models are optimized for portable systems at 85 mW per channel at 12 bits, 40 MSPS, and 25 mW per channel in CW Doppler mode. Input Options With active termination, the AD927x/AD967x product family offers the flexibility to design in several different probe types and maintain the dynamic range of the system. Range of Sample Conversion Rates The sample conversion rate is dependent on the specific model selected and the 12-bit or 14-bit ADC on chip. Sample conversion rates range from 10 MSPS to 125 MSPS. Several models offer an on-chip RF decimator, enabling oversampling for high frequency probe applications. Digital Interface Digital LVDS supports both IEEE and ANSI standards. Double termination allows the user to make longer trace runs supporting digital receivers off board. A data clock output (DCO) operates up to 480 MHz and supports double data rate (DDR) operation. On some models, CML outputs support JESD204B standards, and the embedded clock high speed serial link operates up to 5 Gbps. User Flexibility The serial port interface (SPI) allows designers to further customize the noise, gain, and bias for any given imaging mode, probe, or power requirement. By changing SPI registers, designers can optimize an ultrasound signal processing architecture for the best possible noise performance or longest battery life. An easy-to-use software tool simplifies each configuration. Small Form Factor Eight channels of full TGC path, analog-to-digital converter, and crosspoint switch or I/Q demodulator are contained within a RoHS-compliant 10 mm × 10 mm, CSP_BGA or 16 mm × 16 mm, TQFP_EP package. Octal Receivers • AD9675 14 125 0.75 2.6 0.8 143.6 160 • • AD9674 14 125 0.75 2.6 0.8 143.6 160 • • 150 CSP_BGA • • 150 CSP_BGA 150 CSP_BGA • • 150 CSP_BGA • Package1 • • Digital I/Q Demodulator • • RF Decimator • • CW I/Q Demodulator • • CW Mode Input 160 160 TGC Mode Output 143.6 143.6 Total Channel RS = 50 Ω (nV/√Hz) 0.8 0.8 LNA (pA/√Hz) 2.6 2.6 LNA (nV/√Hz) 0.75 0.75 MSPS (Max) 125 125 Number of Bits 14 14 Part Number AD9671 AD9670 Power @ 40 MSPS (mW) Digital Serial Interface ANSI LVDS Post-ADC Processing IEEE LVDS Dynamic Range (dBFS/√Hz) JESD204B Input Referred Noise FIR Decimation Filter ADC AD9277 14 50 0.75 1 0.85 140.5 160 • • • 193 TQFP_EP AD9276 12 80 0.75 1 0.85 139.9 160 • • • 191 TQFP_EP AD9279 12 80 0.75 2.5 0.8 141.6 160 • • • 130 CSP_BGA AD9278 12 65 1.26 1.5 1.3 140.8 158 • • • 85 CSP_BGA AD9272 12 80 0.75 1 0.85 139.9 160 • • 191 TQFP_EP 104 TQFP_EP, CSP_BGA AD9273 12 50 1.26 1 1.37 137.6 155 • • 110 mm × 10 mm CSP_BGA; 16 mm × 16 mm TQFP_EP | AD927x/AD967x Octal Ultrasound Analog Front End (AFE) Product Family for High Performance Cart-Based and Portable Ultrasound Systems 2 Tx HV AMPLIFIERS DAC Tx BEAMFORMER MULTICHANNELS T/R SWITCHES TRANSDUCER ARRAY 128, 256, ETC., ELEMENTS LNA DIGITAL I/Q DEMODULATOR DECIMATOR ADC VGA AAF CW (ANALOG) BEAMFORMER BIDIRECTIONAL CABLE SPECTRAL CW DOPPLER PROCESSING MODE IF BEAMFORMER SPECTRAL PW DOPPLER PROCESSING MODE AUDIO OUTPUT IMAGE AND MOTION PROCESSING (B MODE) COLOR DOPPLER PROCESSING (F MODE) DISPLAY Simplified ultrasound system block diagram utilizing the AD9670/AD9671 offering per channel digital I/Q demodulation and decimation, reduced bandwidth, and IF beamforming. AVDD1 AVDD2 LO-A TO LO-H PDWN STBY I/Q DEMODULATOR DVDD DRVDD 8 CHANNELS DOUTA+ TO DOUTH+ LVDS DOUTA– TO DOUTH– LOSW-A TO LOSW-H SERDOUT1+ TO SERDOUT4+ JESD204B SERIAL CML SERDOUT1– TO SERDOUT4– AD9671 CLK– DATA RATE MULTIPLIER CLK+ Tx_TRIG– NCO Tx_TRIG+ SDIO CSB SERIAL PORT INTERFACE SCLK CWI– CWI+ CWQ– CWQ+ REFERENCE GAIN+ GAIN– MLO– MLO+ RESET– RESET+ LO GENERATION DIGITAL DEMODULATOR/ DECIMATOR 14-BIT ADC AAF GPO[0:3] LG-A TO LG-H VGA VREF LNA RBIAS LI-A TO LI-H AD9670 On-chip CW I/Q demodulator, RF decimator, and FIR decimation filter is available on the AD9670 with LVDS digital serial interface and the AD9671 with JESD204B digital serial interface. 2 |A D92| Tx HV AMPLIFIERS DAC Tx BEAMFORMER MULTICHANNELS LNA T/R SWITCHES TRANSDUCER ARRAY 128, 256, ETC., ELEMENTS ADC VGA DIGITAL I/Q DEMODULATOR DECIMATOR RF BEAMFORMER AAF CW (ANALOG) BEAMFORMER BIDIRECTIONAL CABLE SPECTRAL CW DOPPLER PROCESSING MODE SPECTRAL PW DOPPLER PROCESSING MODE IMAGE AND MOTION PROCESSING (B MODE) AUDIO OUTPUT COLOR DOPPLER PROCESSING (F MODE) DISPLAY Simplified ultrasound system block diagram utilizing the AD927x and AD967x product family. All models in the family offer eight channels of LNA, VGA, AAF, and 12- or 14-bit ADC. AVDD1 AVDD2 LO-A TO LO-H PDWN STBY I/Q DEMODULATOR DVDD DRVDD 8 CHANNELS DOUTA+ TO DOUTH+ LVDS DOUTA– TO DOUTH– LOSW-A TO LOSW-H SERDOUT1+ TO SERDOUT4+ JESD204B SERIAL CML SERDOUT1– TO SERDOUT4– DATA RATE MULTIPLIER CLK– SDIO SERIAL PORT INTERFACE CLK+ RF DECIMATOR CSB CWI– CWI+ CWQ– CWQ+ REFERENCE GAIN+ GAIN– MLO– MLO+ RESET– RESET+ LO GENERATION 14-BIT ADC SCLK AAF GPO[0:3] VGA VREF LNA RBIAS LI-A TO LI-H LG-A TO LG-H On-chip CW I/Q demodulator and RF decimator is available on the AD9674 with LVDS digital serial interface and the AD9675 with JESD204B digital serial interface. ©2013 Analog Devices, Inc. All rights reserved. Trademarks and registered trademarks are the property of their respective owners. Printed in the U.S.A. BR07749-1-5/13(B) Analog Devices, Inc. Worldwide Headquarters Analog Devices, Inc. One Technology Way P.O. Box 9106 Norwood, MA 02062-9106 U.S.A. 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