ADA4896-2ACP-EBZ AD [Analog Devices], ADA4896-2ACP-EBZ Datasheet - Page 22

• Manufacturer Part Number: ADA4896-2ACP-EBZ
• Description: 1 nV/?Hz, Low Power
• Manufacturer: AD [Analog Devices]

ADA4896-2/ADA4897-1/ADA4897-2
MEDICAL ULTRASOUND APPLICATIONS
Overview of the Ultrasound System
Medical ultrasound systems are among the most sophisticated
signal processing systems in widespread use today. By transmit-
ting acoustic energy into the body and receiving and processing
the returning reflections, ultrasound systems can generate images
of internal organs and structures, map blood flow and tissue
motion, and provide highly accurate blood velocity information.
Figure 54 shows a simplified block diagram of an ultrasound
system.
TRANSDUCER
ARRAY
DEMUX
MUX/
HV
Figure 54. Simplified Ultrasound System Block Diagram
SWITCHES
T/R
BEAMFORMER
Rev. | Page 22 of 28
CW (ANALOG)
ADA4896-2/
ADA4897-1/
ADA4897-2
AD9279
LNA
OUTPUT
B
AUDIO
Tx BEAMFORMER
VGA
The ultrasound system consists of two main operations: the
time gain control (TGC) operation and the continuous wave
(CW) Doppler operation. The
components of these two operations into a single IC. It contains
eight channels of a variable gain amplifier (VGA) with a low
noise preamplifier (LNA), an antialiasing filter (AAF), an
analog-to-digital converter (ADC), and an I/Q demodulator
with programmable phase rotation. For detailed information
about how to use the
AD9279
AAF
PROCESSING
SPECTRAL
data sheet.
DOPPLER
MODE
ADC
AD9279
PROCESSING
IMAGE AND
(B MODE)
MOTION
CENTRAL CONTROL
BEAMFORMER
Rx BEAMFORMER
(B AND F MODES)
in an ultrasound system, see the
AD9279
DISPLAY
PROCESSING
integrates the essential
DOPPLER
(F MODE)
COLOR
Data Sheet