AFE5808ZCF datasheet(54/68 Pages) TI1

Part #	AFE5808ZCF

Description	Fully Integrated, 8-Channel Ultrasound Analog Front End with Passive CW Mixer, 0.75nV/rtHz, 14/12-Bit, 65MSPS, 153mW/CH

PDF	68 Pages

Scroll/Zoom	100%

Manufacturer	TI1 [Texas Instruments]

Direct Link	http://www.ti.com

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54 / 68 page

S0501-01

I/VSum

Amp

CW_AMPINP

CW_OUTM

CW_AMPINM

CW_OUTP

EXT

INT

2000Ω

1000Ω

500Ω

250Ω

AFE5808

SLOS688C – SEPTEMBER 2010 – REVISED APRIL 2012

www.ti.com

Figure 86. CW Summing Amplifier Block Diagram

Multiple AFE5808s are usually utilized in parallel to expand CW beamformer channel count. These AFE5808s’

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 1uF

to 10s

μF depending on the desired low frequency Doppler signal from slow blood flow. Multiple AFE5808s’ 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.

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AFE5808ZCF Datasheet(PDF) 54 Page - Texas Instruments