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AFE5804 Datasheet(PDF) 53 Page - Texas Instruments

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Part # AFE5804
Description  FULLY-INTEGRATED, 8-CHANNEL ANALOG FRONT-END FOR ULTRASOUND 0.89nV/?숰z, 12-Bit, 40MSPS, 101mW/Channel
PDF  60 Pages
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Manufacturer  TI [Texas Instruments]
Direct Link  http://www.ti.com
Logo TI - Texas Instruments

AFE5804 Datasheet(HTML) 53 Page - Texas Instruments

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ADC
V
CM0
(+2.5V)
Amplifier
0
90
IandQ
Channel
ADC
AFE5804
CWOut
8InBy10Out
CW0
CW1
CW2
CW3
CW4
CW5
CW6
CW7
CW8
CW9
AFE5804
CWOut
8InBy10Out
CW0
CW1
CW2
CW3
CW4
CW5
CW6
CW7
CW8
CW9
Passive
Delay
Line
Clock
L=220 H
m
AFE5804
www.ti.com ................................................................................................................................................ SBOS442A – JUNE 2008 – REVISED SEPTEMBER 2008
The resulting signal current then passes through the
After summing, the CW signal path further consists of
8×10 switch matrix. Depending on the programmed
a high dynamic range mixer for down-conversion to
configuration of the switch matrix, any V/I amplifier
I/Q base-band signals. The I/Q signals are then
current output can be connected to any of 10 CW
band-limited (that is, low-frequency contents are
outputs. This design is a simple current-summing
removed) in a filter stage that precedes a pair of
circuit such that each CW output can represent the
high-resolution, low sample rate ADCs.
sum of any or all of the channel currents. The CW
outputs are typically routed to a passive LC delay
line, allowing coherent summing of the signals.
Figure 102. Conceptual CW Doppler Signal Path Using Current Summing and a Passive Delay Line for
Beam-Forming
Copyright © 2008, Texas Instruments Incorporated
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