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AFE5808A Scheda tecnica(PDF) 54 Page - Texas Instruments

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Il numero della parte AFE5808A
Spiegazioni elettronici  Fully Integrated, 8-Channel Ultrasound Analog Front End with Passive CW Mixer, 0.75 nV/rtHz, 14/12-Bit, 65 MSPS, 158 mW/CH
PDF  66 Pages
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Produttore elettronici  TI1 [Texas Instruments]
Homepage  http://www.ti.com
Logo TI1 - Texas Instruments

AFE5808A Scheda tecnica(HTML) 54 Page - Texas Instruments

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S0501-01
I/VSum
Amp
CW_AMPINP
CW_OUTM
CW_AMPINM
CW_OUTP
C
EXT
C
EXT
R
EXT
R
EXT
R
INT
R
INT
2000Ω
2000Ω
1000Ω
1000Ω
500Ω
500Ω
250Ω
250Ω
250Ω
250Ω
AFE5808A
SLOS729B – OCTOBER 2011 – REVISED APRIL 2012
www.ti.com
Figure 87. CW Summing Amplifier Block Diagram
Multiple AFE5808As are usually utilized in parallel to expand CW beamformer channel count. These AFE5808As’
CW outputs can be summed and filtered externally further to achieve desired gain and filter response. AC
coupling capacitors CAC are required to block DC component of the CW carrier signal. CAC can vary from 1 µF to
10s
μF depending on the desired low frequency Doppler signal from slow blood flow. Multiple AFE5808As’ I/Q
outputs can be summed together with a low noise external differential amplifiers before 16/18-bit differential
audio ADCs. TI’s ultralow noise differential precision amplifier OPA1632 and THS4130 are suitable devices.
54
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Copyright © 2011–2012, Texas Instruments Incorporated
Product Folder Link(s): AFE5808A



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