AD927x Family of Octal Receivers
LO-C
LI-C
LG-C
LOSW-D
LO-D
LI-D
LG-D
LOSW-E
LO-E
LI-E
LG-E
LOSW-F
LO-F
LI-F
LG-F
LOSW-G
LO-G
LI-G
LG-G
LNA
VGA
AAF
LNA
VGA
AAF
LNA
VGA
AAF
LNA
VGA
AAF
LNA
VGA
AAF
LOSW-H
LO-H
LI-H
LG-H
Digital Interface: Digital LVDS outputs support 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.
User Flexibility: 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.
LNA
VGA
AAF
SERIAL
LVDS
DOUTB+
DOUTB–
12-BIT
ADC
SERIAL
LVDS
DOUTC+
DOUTC–
12-BIT
ADC
SERIAL
LVDS
DOUTD+
DOUTD–
12-BIT
ADC
SERIAL
LVDS
DOUTE+
DOUTE–
12-BIT
ADC
SERIAL
LVDS
DOUTF+
DOUTF–
12-BIT
ADC
SERIAL
LVDS
DOUTG+
DOUTG–
12-BIT
ADC
SERIAL
LVDS
DOUTH+
DOUTH–
REFERENCE
SWITCH
ARRAY
DATA
RATE
MULTIPLIER
LOSW-C
12-BIT
ADC
SDIO
AAF
DOUTA+
DOUTA–
CLK+
CLK–
VGA
SERIAL
LVDS
SERIAL
PORT
INTERFACE
LNA
12-BIT
ADC
CSB
SCLK
LOSW-B
LO-B
LI-B
LG-B
DRVDD
PDWN
STBY
AVDD2
AAF
VREF
A Range of Sample Conversion Rates: The sample conversion rate is dependent
on the specific model selected. The AD9272 12-bit ADC has a conversion rate of
10 MSPS to 80 MSPS. The AD9271/AD9273 12-bit ADC has a conversion rate of
10 MSPS to 50 MSPS.
VGA
RBIAS
Input Options: The AD927x boasts the largest linear input range up to 0.733 V p-p
including several input options and active termination. With active termination, the
user can design in several different probe types and maintain the dynamic range
of the system.
LNA
GAIN–
Low Power: The power dissipation is dependent on the specific model selected.
The AD9273 offers 100 mW per channel at 12 bits/40 MSPS and 50 mW per
channel in CW Doppler mode.
AD9272/AD9273
GAIN+
Low Noise: The input-referred noise is dependent on the specific model selected.
The AD9272 offers an LNA input-referred noise of 0.75 nV/√Hz and a combined
input-referred noise of the entire channel of 0.83 nV/√Hz at maximum gain—giving
the AD9272 a 6 dB dynamic range advantage over competing parts.
LO-A
LI-A
LG-A
CWVDD
Product Highlights
LOSW-A
CWD[7:0]
The AD927x family of octal receivers addresses the challenges facing designers of
next-generation, high performance, and portable ultrasound systems, including the
need to balance image quality and diagnostic capabilities with power requirements.
The AD927x integrates a complete 8-channel (octal) ultrasound receiver on a single
chip replacing previous discrete solutions. Each of the eight channels on the chip
includes a low noise preamplifier (LNA), variable gain amplifier (VGA), antialiasing
filter (AAF), and 12-bit analog-to-digital converter (ADC). Each channel is optimized
for dynamic performance and low power in applications where a small package
size is critical.
AVDD1
High Performance and Portable Ultrasound
AD9272/AD9273 functional block diagram.
Small Form Factor: Eight channels of full TGC path, ADC, and crosspoint switch
contained within an RoHS compliant, 100-lead, 16 mm × 16 mm TQFP.
Octal Receivers
Part Number
AD9271
AD9272
AD9273
LNA Input Range
(mV p-p)
LNA Input Noise
(nV/√Hz)
Total Channel Input Noise, No
Termination, RS = 0 𝛀 (nV/√Hz)
Input Dynamic Range for Channel,
with Termination, RS = RIN = 200 𝛀 (dB/√Hz)
Power @ 40 MSPS
(mW)
400, 333, 250
733, 550, 367
733, 550, 367
1.4, 1.2, 1.1; 1 pA
0.98, 0.86, 0.75; 1 pA
1.60, 1.42, 1.26; 1 pA
1.65, 1.44, 1.31
1.21, 1.01, 0.83
1.92, 1.63, 1.37
158.5, 157.9, 156.4
165.4, 163.8, 161.2
163.2, 162.0, 159.8
150
191
104
www.analog.com/medicalics
FCO+
FCO–
DCO+
DCO–
Tx HV AMPS
BEAMFORMER
CENTRAL CONTROL
Tx BEAMFORMER
MULTICHANNELS
AD9271/AD9272/AD9273
HV MUX/
DEMUX
T/R SWITCHES
LNA
ADC
VGA
AAF
Rx BEAMFORMER
(B AND F MODES)
CW
TRANSDUCER ARRAY
128, 256, ETC.,
ELEMENTS
BIDIRECTIONAL CABLE
CW (ANALOG)
BEAMFORMER
SPECTRAL DOPPLER
PROCESSING MODE
AUDIO
OUTPUT
IMAGE AND MOTION
PROCESSING
(B MODE)
COLOR DOPPLER
(PW) PROCESSING
(F MODE)
DISPLAY
10
9
8
7
NF (dB)
6
5
4
RIN = 200 ±
(ACTIVE TERMINATED)
3
2
1
0
10
UNTERMINATED
100
RS
1000
The AD9272 and AD9273
offer the system designer active
termination for input impedance
matching. This results in a
superior noise figure for the
system. AD9272 noise figure
performance has a 3 dB
advantage over the competition
when RS = RIN = 200 Ω.
Analog Devices, Inc.
Worldwide Headquarters
Analog Devices, Inc.
One Technology Way
P.O. Box 9106
Norwood, MA 02062-9106
U.S.A.
Tel: 781.329.4700
(800.262.5643,
U.S.A. only)
Fax: 781.461.3113
Analog Devices, Inc.
Europe Headquarters
Analog Devices, Inc.
Wilhelm-Wagenfeld-Str. 6
80807 Munich
Germany
Tel: 49.89.76903.0
Fax: 49.89.76903.157
Analog Devices, Inc.
Japan Headquarters
Analog Devices, KK
New Pier Takeshiba
South Tower Building
1-16-1 Kaigan, Minato-ku,
Tokyo, 105-6891
Japan
Tel: 813.5402.8200
Fax: 813.5402.1064
The serial port interface (SPI) control offers a wide range of flexible features to meet
specific system requirements.
©2008 Analog Devices, Inc. All rights reserved.
Trademarks and registered trademarks are the property
of their respective owners.
Printed in the U.S.A.
PH07749-1-10/08
www.analog.com/medicalics
Analog Devices, Inc.
Southeast Asia
Headquarters
Analog Devices
22/F One Corporate Avenue
222 Hu Bin Road
Shanghai, 200021
China
Tel: 86.21.2320.8000
Fax: 86.21.2320.8222