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AD9271 반도체 회로 부품 판매점

Octal LAN/VGA/AAF/ADC and Crosspoint Switch



Analog Devices 로고
Analog Devices
AD9271 데이터시트, 핀배열, 회로
FEATURES
8 channels of LNA, VGA, AAF, and ADC
Low noise preamplifier (LNA)
Input-referred noise = 1.1 nV/√Hz @ 5 MHz typical,
gain = 18 dB
SPI-programmable gain = 14 dB/15.6 dB/18 dB
Single-ended input; VIN maximum = 400 mV p-p/
333 mV p-p/250 mV p-p
Dual-mode active input impedance matching
Bandwidth (BW) > 70 MHz
Full-scale (FS) output = 2 V p-p differential
Variable gain amplifier (VGA)
Gain range = −6 dB to +24 dB
Linear-in-dB gain control
Antialiasing filter (AAF)
3rd-order Butterworth cutoff
Programmable from 8 MHz to 18 MHz
Analog-to-digital converter (ADC)
12 bits at 10 MSPS to 50 MSPS
SNR = 70 dB
SFDR = 80 dB
Serial LVDS (ANSI-644, IEEE 1596.3 reduced range link)
Data and frame clock outputs
Includes crosspoint switch to support
continuous wave (CW) Doppler
Low power, 150 mW per channel at 12 bits/40 MSPS (TGC)
90 mW per channel in CW Doppler
Single 1.8 V supply (3.3 V supply for CW Doppler output bias)
Flexible power-down modes
Overload recovery in <10 ns
Fast recovery from low power standby mode, <2 μs
100-lead TQFP
APPLICATIONS
Medical imaging/ultrasound
Automotive radar
GENERAL DESCRIPTION
The AD9271 is designed for low cost, low power, small size,
and ease of use. It contains eight channels of a variable gain amp-
lifier (VGA) with low noise preamplifier (LNA); an antialiasing
filter (AAF); and a 12-bit, 10 MSPS to 50 MSPS analog-to-digital
converter (ADC).
Each channel features a variable gain range of 30 dB, a fully
differential signal path, an active input preamplifier termination, a
maximum gain of up to 40 dB, and an ADC with a conversion
rate of up to 50 MSPS. The channel is optimized for dynamic
performance and low power in applications where a small
package size is critical.
Octal LNA/VGA/AAF/ADC
and Crosspoint Switch
AD9271
FUNCTIONAL BLOCK DIAGRAM
LOSW-A
LO-A
LI-A
LNA VGA
LG-A
LOSW-B
LO-B
LI-B
LG-B LNA VGA
LOSW-C
LO-C
LI-C
LG-C LNA VGA
LOSW-D
LO-D
LI-D LNA VGA
LG-D
LOSW-E
LO-E
LI-E
LG-E LNA VGA
LOSW-F
LO-F
LI-F
LG-F LNA VGA
LOSW-G
LO-G
LI-G
LNA VGA
LG-G
LOSW-H
LO-H
LI-H
LG-H LNA VGA
SWITCH
ARRAY
AD9271
AAF
12-BIT
ADC
SERIAL
LVDS
DOUTA+
DOUTA–
AAF
12-BIT
ADC
SERIAL
LVDS
DOUTB+
DOUTB–
AAF
12-BIT
ADC
SERIAL
LVDS
DOUTC+
DOUTC–
AAF
12-BIT
ADC
SERIAL
LVDS
DOUTD+
DOUTD–
AAF
12-BIT
ADC
SERIAL
LVDS
DOUTE+
DOUTE–
AAF
12-BIT
ADC
SERIAL
LVDS
DOUTF+
DOUTF–
AAF
12-BIT
ADC
SERIAL
LVDS
DOUTG+
DOUTG–
AAF
12-BIT
ADC
REFERENCE
SERIAL
LVDS
DOUTH+
DOUTH–
FCO+
FCO–
DCO+
DCO–
Figure 1.
The LNA has a single-ended-to-differential gain that is selectable
through the SPI. The LNA input noise is typically 1.2 nV/√Hz,
and the combined input-referred noise of the entire channel
is 1.4 nV/√Hz at maximum gain. Assuming a 15 MHz noise
bandwidth (NBW) and a 15.6 dB LNA gain, the input SNR is
roughly 86 dB. In CW Doppler mode, the LNA output drives a
transconductance amp that is switched through an 8 × 6
differential crosspoint switch. The switch is programmable
through the SPI.
Rev. B
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.
Trademarksandregisteredtrademarksarethepropertyoftheirrespectiveowners.
One Technology Way, P.O. Box 9106, Norwood, MA 02062-9106, U.S.A.
Tel: 781.329.4700
www.analog.com
Fax: 781.461.3113 ©2007–2009 Analog Devices, Inc. All rights reserved.


AD9271 데이터시트, 핀배열, 회로
AD9271* Product Page Quick Links
Last Content Update: 11/01/2016
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Documentation
Application Notes
• AN-1142: Techniques for High Speed ADC PCB Layout
• AN-586: LVDS Outputs for High Speed A/D Converters
• AN-812: MicroController-Based Serial Port Interface (SPI)
Boot Circuit
• AN-877: Interfacing to High Speed ADCs via SPI
• AN-878: High Speed ADC SPI Control Software
Data Sheet
• AD9271: Octal LNA/VGA/AAF/ADC and Crosspoint
Switch Data Sheet
Tools and Simulations
• Visual Analog
Reference Materials
Informational
• Integrated Analog Front End (AFE) Contains Eight
Ultrasound Receive Channels in a Single IC
Press
• Industry’s First Octal Ultrasound Receiver with Digital I/Q
Demodulator and Decimation Filter Reduces Processor
Overhead in Ultrasound Systems
Technical Articles
• MS-2210: Designing Power Supplies for High Speed ADC
• Semiconductors: The Heart of Next-Generation Medical
Devices
Design Resources
• AD9271 Material Declaration
• PCN-PDN Information
• Quality And Reliability
• Symbols and Footprints
Discussions
View all AD9271 EngineerZone Discussions
Sample and Buy
Visit the product page to see pricing options
Technical Support
Submit a technical question or find your regional support
number
* This page was dynamically generated by Analog Devices, Inc. and inserted into this data sheet. Note: Dynamic changes to
the content on this page does not constitute a change to the revision number of the product data sheet. This content may be
frequently modified.




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