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AFE4490 Datasheet(PDF) 36 Page - Texas Instruments

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Part # AFE4490
Description  Integrated Analog Front-End for Pulse Oximeters
PDF  70 Pages
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Manufacturer  TI [Texas Instruments]
Direct Link  http://www.ti.com
Logo TI - Texas Instruments

AFE4490 Datasheet(HTML) 36 Page - Texas Instruments

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To Rx Front-End
INM
INP
Cable
Internal
LED_DRV_SUP
Internal
LED_DRV_SUP
10 k:
10 k:
10 k:
10 k:
1 PA
Rx On/Off
Rx On/Off
GND Wires
PD Wires
LED Wires
Cable Legend
AFE4490
SBAS602B – DECEMBER 2012 – REVISED FEBRUARY 2013
www.ti.com
DIAGNOSTICS
The device includes diagnostics to detect open or short conditions of the LED and photosensor, LED current
profile feedback, and cable on or off detection.
Photodiode-Side Fault Detection
Figure 48 shows the diagnostic for the photodiode-side fault detection.
Figure 48. Photodiode Diagnostic
36
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Copyright © 2012–2013, Texas Instruments Incorporated
Product Folder Links: AFE4490



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