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AFE5803

更新时间： 2024-09-18 11:46:07
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德州仪器 - TI /
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52页 789K
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Fully Integrated, 8-Channel Ultrasound Analog Front End

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AFE5803 数据手册

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AFE5803  
www.ti.com  
SLOS763A –JANUARY 2012–REVISED JANUARY 2012  
Fully Integrated, 8-Channel Ultrasound Analog Front End,  
0.75 nV/rtHz, 14/12-Bit, 65 MSPS, 158 mW/CH  
Check for Samples: AFE5803  
1
FEATURES  
DESCRIPTION  
The AFE5803 is a highly integrated Analog Front-End  
•
8-Channel Complete Analog Front-End  
LNA, VCAT, PGA, LPF, ADC  
(AFE) solution specifically designed for ultrasound  
systems in which high performance and small size  
are required. The AFE5803 integrates a complete  
time-gain-control (TGC) imaging path. It also enables  
users to select one of various power/noise  
combinations to optimize system performance.  
Therefore, the AFE5803 is a suitable ultrasound  
analog front end solution for portable systems.  
–
•
Programmable Gain Low-Noise Amplifier  
(LNA)  
–
–
–
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24/18/12 dB Gain  
0.25/0.5/1 VPP Linear Input Range  
0.63/0.7/0.9 nV/rtHz Input Referred Noise  
Programmable Active Termination  
The AFE5803 contains eight channels of voltage  
controlled amplifier (VCA), 14/12-bit Analog-to-Digital  
Converter (ADC). The VCA includes Low noise  
Amplifier (LNA), Voltage controlled Attenuator  
(VCAT), Programmable Gain Amplifier (PGA), and  
Low-Pass Filter (LPF). The LNA gain is  
programmable to support 250 mVPP to 1 VPP input  
signals. Programmable active termination is also  
supported by the LNA. The ultra-low noise VCAT  
provides an attenuation control range of 40 dB and  
improves overall low gain SNR which benefits  
harmonic imaging and near field imaging. The PGA  
provides gain options of 24 dB and 30 dB. Before the  
ADC, a LPF can be configured as 10 MHz, 15 MHz,  
20 MHz or 30 MHz to support ultrasound applications  
with different frequencies. The high-performance  
14bit/65 MSPS ADC in the AFE5803 achieves  
77dBFS SNR. It ensures excellent SNR at low chain  
gain. The ADC’s LVDS outputs enable flexible system  
integration desired for miniaturized systems.  
•
40 dB Low Noise Voltage Controlled  
Attenuator (VCAT)  
•
•
24/30 dB Programmable Gain Amplifier (PGA)  
3rd Order Linear Phase Low-Pass Filter (LPF)  
–
10, 15, 20, 30 MHz  
•
•
•
14-bit Analog to Digital Converter (ADC)  
–
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77 dBFS SNR at 65 MSPS  
LVDS Outputs  
Noise/Power Optimizations (Full Chain)  
–
–
158 mW/CH at 0.75 nV/rtHz, 65 MSPS  
101 mW/CH at 1.1 nV/rtHz, 40 MSPS  
Excellent Device-to-Device Gain Matching  
±0.5 dB (Typical) and ±0.9 dB (Max)  
–
•
•
•
Low Harmonic Distortion  
Fast and Consistent Overload Recovery  
Small Package: 15 mm x 9 mm, 135-BGA  
The AFE5803 is available in a 15mm × 9mm, 135-pin  
BGA package and it is specified for operation from  
0°C to 85°C. It is also pin-to-pin compatible to the  
AFE5807, AFE5808 and AFE5808A.  
APPLICATIONS  
•
•
Medical Ultrasound Imaging  
Nondestructive Evaluation Equipments  
1
Please be aware that an important notice concerning availability, standard warranty, and use in critical applications of Texas  
Instruments semiconductor products and disclaimers thereto appears at the end of this data sheet.  
PRODUCTION DATA information is current as of publication date.  
Products conform to specifications per the terms of the Texas  
Instruments standard warranty. Production processing does not  
necessarily include testing of all parameters.  
Copyright © 2012, Texas Instruments Incorporated  
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