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AFE4490 Datasheet(PDF) 22 Page - Texas Instruments

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Part # AFE4490
Description  Integrated Analog Front-End for Heart Rate Monitors and Low-Cost Pulse Oximeters
PDF  69 Pages
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Manufacturer  TI [Texas Instruments]
Direct Link  http://www.ti.com
Logo TI - Texas Instruments

AFE4490 Datasheet(HTML) 22 Page - Texas Instruments

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Photodiode Current
Or
I-V Output
Ambient Level
(Dark Level)
SR,
Sample RED
SR_amb,
Sample Ambient
(RED Phase)
CONVR,
RED ADC Converts
(RED ± Ambient)
SIR,
Sample IR
SIR_amb,
Sample Ambient
(IR Phase)
CONVIR,
IR ADC Converts
(IR ± Ambient)
Plethysmograph Signal
ADCLKR,
Red ADC
Sample Clock
ADCLKIR,
IR ADC
Sample Clock
RED
N
RED
N+1
RED ADC
Output Data
IR
N-1
IR
N
N
N+2
N+1
N
N+1
IR ADC
Output Data
AFE4400
SBAS601D – DECEMBER 2012 – REVISED MAY 2013
www.ti.com
NOTE: Relationship to the AFE4400 EVM is: LED1 = IR and LED2 = RED.
Figure 36. Rx Timing Diagram
22
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Copyright © 2012–2013, Texas Instruments Incorporated
Product Folder Links: AFE4400



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