參數(shù)資料
型號： AD9276BSVZ
廠商： Analog Devices Inc
文件頁數(shù)： 14/48頁
文件大?。?/td> 0K
描述： IC ADC 12BIT LNA/VGA/AAF 100TQFP
標(biāo)準(zhǔn)包裝： 1
類型： AAF，ADC，解調(diào)器，LNA，VGA
分辨率（位）： 12 b
采樣率（每秒）： 10M ~ 80M
數(shù)據(jù)接口： 串行，SPI?
電壓電源： 模擬和數(shù)字
電源電壓： 1.8V，3V
工作溫度： -40°C ~ 85°C
安裝類型： 表面貼裝
封裝/外殼： 100-TQFP 裸露焊盤
供應(yīng)商設(shè)備封裝： 100-TQFP-EP（14x14）
包裝： 托盤
AD9276
Rev. 0 | Page 21 of 48
THEORY OF OPERATION
ULTRASOUND
The primary application for the AD9276 is medical ultrasound.
Figure 45 shows a simplified block diagram of an ultrasound
system. A critical function of an ultrasound system is the time
gain control (TGC) compensation for physiological signal
attenuation. Because the attenuation of ultrasound signals is
exponential with respect to distance (time), a linear-in-dB VGA
is the optimal solution.
Key requirements in an ultrasound signal chain are very low
noise, active input termination, fast overload recovery, low power,
and differential drive to an ADC. Because ultrasound machines
use beamforming techniques requiring large binary-weighted
numbers of channels (for example, 32 to 512), using the lowest
power at the lowest possible noise is of chief importance.
Most modern ultrasound machines use digital beamforming.
In this technique, the signal is converted to digital format
immediately following the TGC amplifier, and then beam-
forming is accomplished digitally.
The ADC resolution of 12 bits with up to 80 MSPS sampling
satisfies the requirements of both general-purpose and high
end systems.
Power conservation and low cost are two of the most important
factors in low end and portable ultrasound machines, and the
AD9276 is designed to meet these criteria.
For additional information regarding ultrasound systems, refer
to “How Ultrasound System Considerations Influence Front-End
Component Choice,” Analog Dialogue, Volume 36, Number 3,
May–July 2002, and “The AD9271—A Revolutionary Solution for
Portable Ultrasound,” Analog Dialogue, Volume 41, Number 7,
July 2007.
BEAMFORMER
CENTRAL CONTROL
Rx BEAMFORMER
(B AND F MODES)
COLOR
DOPPLER (PW)
PROCESSING
(F MODE)
IMAGE AND
MOTION
PROCESSING
(B MODE)
SPECTRAL
DOPPLER
PROCESSING
MODE
DISPLAY
AUDIO
OUTPUT
Tx BEAMFORMER
CW (ANALOG)
BEAMFORMER
TRANSDUCER
ARRAY
128, 256, ETC.,
ELEMENTS
BIDIRECTIONAL
CABLE
HV
MUX/
DEMUX
T/R
SWITCHES
Tx HV AMPLIFIERS
MULTICHANNELS
AAF
VGA
LNA
ADC
08
18
0-
0
39
Figure 45. Simplified Ultrasound System Block Diagram
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AD9276XBCZ 功能描述:IC ADC 12BIT LNA/VGA/AAF 制造商:analog devices inc. 系列:* 零件狀態(tài):上次購買時間 標(biāo)準(zhǔn)包裝:1
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AD9277 制造商:AD 制造商全稱:Analog Devices 功能描述:Octal LNA/VGA/AAF/14-Bit ADC and CW I/Q Demodulator
AD9277-50EBZ 功能描述:BOARD EVAL FOR AD9277 RoHS:是 類別:編程器，開發(fā)系統(tǒng) >> 評估板 - 模數(shù)轉(zhuǎn)換器 (ADC) 系列:- 產(chǎn)品培訓(xùn)模塊:Obsolescence Mitigation Program 標(biāo)準(zhǔn)包裝:1 系列:- ADC 的數(shù)量:1 位數(shù):12 采樣率（每秒）:94.4k 數(shù)據(jù)接口:USB 輸入范圍:±VREF/2 在以下條件下的電源（標(biāo)準(zhǔn)）:- 工作溫度:-40°C ~ 85°C 已用 IC / 零件:MAX11645 已供物品:板，軟件
AD9277BSVZ 功能描述:IC ADC 14BIT LNA/VGA/AAF 100TQFP RoHS:是 類別:集成電路 (IC) >> 數(shù)據(jù)采集 - ADCs/DAC - 專用型 系列:- 產(chǎn)品培訓(xùn)模塊:Lead (SnPb) Finish for COTS Obsolescence Mitigation Program 標(biāo)準(zhǔn)包裝:50 系列:- 類型:數(shù)據(jù)采集系統(tǒng)（DAS） 分辨率（位）:16 b 采樣率（每秒）:21.94k 數(shù)據(jù)接口:MICROWIRE?，QSPI?，串行，SPI? 電壓電源:模擬和數(shù)字 電源電壓:1.8 V ~ 3.6 V 工作溫度:-40°C ~ 85°C 安裝類型:表面貼裝 封裝/外殼:40-WFQFN 裸露焊盤 供應(yīng)商設(shè)備封裝:40-TQFN-EP（6x6） 包裝:托盤
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