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AFE5809ZCF Datasheet(PDF) 7 Page - Texas Instruments

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Part # AFE5809ZCF
Description  Fully Integrated, 8-Channel Ultrasound Analog Front End with Passive CW Mixer, and Digital I/Q Demodulator, 0.75 nV/rtHz, 14, 12-Bit, 65 MSPS, 158 mW/CH
PDF  90 Pages
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Manufacturer  TI [Texas Instruments]
Direct Link  http://www.ti.com
Logo TI - Texas Instruments

AFE5809ZCF Datasheet(HTML) 7 Page - Texas Instruments

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AFE5809
www.ti.com
SLOS738C – SEPTEMBER 2012 – REVISED JANUARY 2013
PIN FUNCTIONS (continued)
PIN
DESCRIPTION
NO.
NAME
Serial interface data readout. High impedance when readout is disabled. This pin is connected to ADC
M9
SDOUT
only. 1.8 V logic can be used.
Serial interface enable with an internal pull up resistor of 20 k
Ω. Active low. This pin is connected to
L9
SEN
both ADC and VCA. 3.3V logic should be used.
Serial interface enable for the digital demodulator memory space. SPI_DIG_EN pin is required to be
set to '0' during SPI transactions to demodulator registers. Each transaction starts by setting SEN as '0'
M7
SPI_DIG_EN
and terminates by setting it back to '1' (similar to other register transactions). Pull up internally through
a 20 K
Ω resistor. This pin is connected to both ADC and VCA. 3.3V logic should be used.
System trig signal input. It indicates the start of signal transmission. Either 3. 3 V or 1. 8 V logic level
L7
TX_SYNC_IN
can be used.
K4
VCNTLM
Negative differential attenuation control pin.
K3
VCNTLP
Positive differential attenuation control pin
K5
VHIGH
Bias voltage; bypass to ground with
≥ 1 µF.
M3
VREF_IN
ADC 1.4V reference input in the external reference mode; bypass to ground with 0.1µF.
K7,L5, M5, M8
DNC
Do not connect. Must leave floated
Copyright © 2012–2013, Texas Instruments Incorporated
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Product Folder Links: AFE5809



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