参数资料
| 型号： | AD8335ACPZ-REEL |
| 厂商： | Analog Devices Inc |
| 文件页数： | 13/28页 |
| 文件大小： | 0K |
| 描述： | IC AMP VGA QUAD 64LFCSP |
| 产品变化通告： | AD8335 Metal Mask Change 12/Jul/2010 |
| 标准包装： | 2,500 |
| 系列： | X-AMP® |
| 类型： | 可变增益放大器 |
| 应用： | 信号处理 |
| 安装类型： | 表面贴装 |
| 封装/外壳： | 64-VFQFN 裸露焊盘，CSP |
| 供应商设备封装： | 64-LFCSP-VQ（9x9） |
| 包装： | 带卷 (TR) |
| 配用： | AD8335-EVALZ-ND - BOARD EVALUATION FOR AD8335 |
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AD8335
Data Sheet
Rev. B | Page 20 of 28
APPLICATIONS INFORMATION
ULTRASOUND
The primary application for the AD8335 is medical ultrasound.
Figure 57 shows a simplified block diagram of an ultrasound
system. The most 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 (for example, 32 to 512) of channels, the
lowest power at the lowest possible noise is of key importance.
Most modern machines use digital beamforming. In this technique,
the signal is converted to digital format immediately following
the TGC amplifier; beamforming is done digitally.
Typical ADC resolution in general purpose machines is 10 bits
with sampling rates greater than 40 MSPS, and high-end systems
use 12 bits.
Power consumption and low cost are of primary importance in
low-end and portable ultrasound machines, and the AD8335 is
designed for these criteria.
For additional information regarding ultrasound systems, refer
to “How Ultrasound System Considerations Influence Front-End
Component Choice”, Analog Dialogue, Vol. 36, No. 3, May–July
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
LNAs
TRANSDUCER
ARRAY
128, 256 ETC.
ELEMENTS
BIDIRECTIONAL
CABLE
HV
MUX/
DEMUX
T/R
SWITCHES
TX HV AMPs
MULTICHANNEL
TGC USES MANY VGAs
TGC
TIME GAIN COMPENSATION
04
97
6-
05
3
VGAs
AD8335
Figure 57. Simplified Ultrasound System Block Diagram
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相关代理商/技术参数 |
参数描述 |
|---|---|
| AD8335ACPZ-REEL7 | 功能描述:IC AMP VGA QUAD 64LFCSP RoHS:是 类别:集成电路 (IC) >> 线性 - 放大器 - 专用 系列:X-AMP® 产品培训模块:Lead (SnPb) Finish for COTS Obsolescence Mitigation Program 标准包装:60 系列:- 类型:可变增益放大器 应用:CATV 安装类型:表面贴装 封装/外壳:20-WQFN 裸露焊盘 供应商设备封装:20-TQFN-EP（5x5） 包装:托盘 |
| AD8335EVAL | 制造商:Analog Devices 功能描述:EVAL BOARD ((NS)) |
| AD8335-EVAL | 制造商:AD 制造商全称:Analog Devices 功能描述:Quad Low Noise, Low Cost Variable Gain Amplifier |
| AD8335-EVALZ | 功能描述:BOARD EVALUATION FOR AD8335 RoHS:是 类别:编程器，开发系统 >> 评估板 - 运算放大器 系列:X-AMP® 产品培训模块:Lead (SnPb) Finish for COTS Obsolescence Mitigation Program 标准包装:1 系列:- |
| AD8336 | 制造商:AD 制造商全称:Analog Devices 功能描述:General-Purpose, −55 to +125, Wide Bandwidth, DC-Coupled VGA |
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