- 您現(xiàn)在的位置：買賣IC網(wǎng) > PDF目錄17018 > AD9276-80KITZ (Analog Devices Inc)BOARD EVAL HI SPEED FPGA AD9276 PDF資料下載
參數(shù)資料
| 型號： | AD9276-80KITZ |
| 廠商： | Analog Devices Inc |
| 文件頁數(shù)： | 20/48頁 |
| 文件大?。?/td> | 0K |
| 描述： | BOARD EVAL HI SPEED FPGA AD9276 |
| 設計資源： | AD9276/77 Eval Brd Gerber Files |
| 標準包裝： | 1 |
| ADC 的數(shù)量： | 1 |
| 位數(shù)： | 12 |
| 采樣率（每秒）： | 80M |
| 數(shù)據(jù)接口： | 串行，SPI? |
| 輸入范圍： | 733 mVpp |
| 在以下條件下的電源（標準）： | 195mW @ 40MSPS |
| 工作溫度： | -40°C ~ 85°C |
| 已用 IC / 零件： | AD9276 |
| 已供物品： | 板 |
第1頁第2頁第3頁第4頁第5頁第6頁第7頁第8頁第9頁第10頁第11頁第12頁第13頁第14頁第15頁第16頁第17頁第18頁第19頁當前第20頁第21頁第22頁第23頁第24頁第25頁第26頁第27頁第28頁第29頁第30頁第31頁第32頁第33頁第34頁第35頁第36頁第37頁第38頁第39頁第40頁第41頁第42頁第43頁第44頁第45頁第46頁第47頁第48頁
AD9276
Rev. 0 | Page 27 of 48
LNA
18-BIT ADC
AD8021
1.5V
RFILT
CFILT
1.5V
AD8021
I
OTHER
AD9276s
18-BIT ADC
AD8021
1.5V
RFILT
CFILT
1.5V
AD8021
Q
LO
GENERATION
4
CHANNEL A
CHANNEL H
R
ESE
T
4L
O
+
4L
O
–
08
18
0-
04
7
CWI+
CWI–
CWQ+
CWQ–
Figure 53. Typical Connection Interface for I/Q Outputs in CW Mode
Phase Compensation and Analog Beamforming
Beamforming, as applied to medical ultrasound, is defined as
the phase alignment and summation of signals generated from a
common source but received at different times by a multielement
ultrasound transducer. Beamforming has two functions: it imparts
directivity to the transducer, enhancing its gain, and it defines a
focal point within the body from which the location of the return-
ing echo is derived. The primary application for the AD9276 I/Q
demodulators is in analog beamforming circuits for ultrasound
CW Doppler.
Modern ultrasound machines used for medical applications
employ an array of receivers for beamforming, with typical CW
Doppler array sizes of up to 64 receiver channels that are phase
shifted and summed together to extract coherent information.
When used in multiples, the desired signals from each of the
channels can be summed to yield a larger signal (increased by a
factor N, where N is the number of channels), whereas the noise
is increased by the square root of the number of channels. This
technique enhances the signal-to-noise performance of the
machine. The critical elements in a beamformer design are the
means to align the incoming signals in the time domain and the
means to sum the individual signals into a composite whole.
In traditional analog beamformers incorporating Doppler, a
V-to-I converter per channel and a crosspoint switch precede
passive delay lines used as a combined phase shifter and
summing circuit. The system operates at the carrier frequency
(RF) through the delay line, which also sums the signals from
the various channels, and then the combined signal is down-
converted by an I/Q demodulator. The dynamic range of the
demodulator can limit the achievable dynamic range.
The resultant I and Q signals are filtered and then sampled by
two high resolution analog-to-digital converters. The sampled
signals are processed to extract the relevant Doppler information.
Alternatively, the RF signal can be processed by downconversion
on each channel individually, phase shifting the downconverted
signal and then combining all channels. Because the dynamic
range expansion from beamforming occurs after demodulation,
the demodulator dynamic range has little effect on the output
dynamic range. The AD9276 implements this architecture. The
downconversion is done by an I/Q demodulator on each channel,
and the summed current output is the same as in the delay line
approach. The subsequent filters after the I-to-V conversion
and the ADCs are similar.
相關PDF資料 |
PDF描述 |
|---|---|
| UCS2G820MNY9 | CAP ALUM 82UF 400V 20% RADIAL |
| 0210200187 | CABLE FLAT FLEX 3" 0.50MM 18POS |
| VI-BWZ-EX | CONVERTER MOD DC/DC 2V 30W |
| 380LX123M016J012 | CAP ALUM 12000UF 16V 20% SNAP |
| AD9279-80KITZ | KIT EVALUATION FOR AD9279 |
相關代理商/技術參數(shù) |
參數(shù)描述 |
|---|---|
| AD9276BSVZ | 功能描述:IC ADC 12BIT 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)品培訓模塊:Lead (SnPb) Finish for COTS Obsolescence Mitigation Program 標準包裝: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 供應商設備封裝:40-TQFN-EP（6x6） 包裝:托盤 |
| 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 標準包裝:1 |
| AD9276XSVZ | 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 標準包裝:1 |
| 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)轉換器 (ADC) 系列:- 產(chǎn)品培訓模塊:Obsolescence Mitigation Program 標準包裝: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（標準）:- 工作溫度:-40°C ~ 85°C 已用 IC / 零件:MAX11645 已供物品:板，軟件 |
發(fā)布緊急采購，3分鐘左右您將得到回復。