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AFE4403 데이터시트(PDF) 13 Page - Texas Instruments

부품명 AFE4403
상세설명  AFE4404 Ultra-Small, Integrated AFE for Wearable, Optical, Heart-Rate Monitoring and Bio-Sensing
PDF  85 Pages
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제조업체  TI2 [Texas Instruments]
홈페이지  https://www.ti.com
Logo TI2 - Texas Instruments

AFE4403 데이터시트(HTML) 13 Page - Texas Instruments

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Rf
Cf
Rf
Cf
LED2
LED2 Ambient, LED3
LED1 Ambient
SLED2
SLED1_amb
SLED1
SLED2_amb
CONVLED2
CONVLED1
CONVLED2_amb
CONVLED1_amb
Buffer
Filter
LED1
I-V Amplifier (TIA)
Offset
Cancellation DAC
I
2C Interface
INP
INM
6-Bit LED
Current Control
ILED
TX_SUP
TX3
TX2
TX1
Analog-to-Digital
Converter
LDO
RX_SUP
I2C_CLK
I2C_DAT
RESET
ADC_RDY
IO_SUP
4-MHz
Oscillator
CLK
4-MHz Clock
OSC_ENABLE
1
0
Timing
Engine
IO
Buffer
GND
Filter
Filter
Filter
TX_SUP
Copyright © 2016, Texas Instruments Incorporated
13
AFE4404
www.ti.com
SBAS689D – JUNE 2015 – REVISED DECEMBER 2016
Product Folder Links: AFE4404
Submit Documentation Feedback
Copyright © 2015–2016, Texas Instruments Incorporated
8 Detailed Description
8.1 Overview
The AFE has an integrated transmitter and receiver for optical heart-rate monitoring and pulse oximetry
applications. The system is characterized by a parameter termed the pulse repetition frequency (PRF) that
determines the repetition periodicity of a sequence of operations. Every cycle of a PRF results in four 24-bit
digital samples at the output of the AFE, each of which is stored in a separate register.
8.2 Functional Block Diagram



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