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AFE4403 bảng dữ liệu(PDF) 13 Page - Texas Instruments |
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AFE4403 bảng dữ liệu(HTML) 13 Page - Texas Instruments |
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13 / 85 page ![]() 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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