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整合式與特殊功能資料轉換器
醫療 AFE
生物感測 AFE

AFE4404

現行

適用穿戴式光學心率監控和生物感測的超小型整合式 AFE

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產品規格表

AFE4404

現行
產品規格表 立即訂購

產品詳細資料

Applications Clinical fingertip pulse oximetry, Hearables, Optical-HRM Number of input channels 1 Resolution (Bits) 22 Number of LEDs 3 Interface type I2C Operating temperature range (°C) -20 to 70 Rating Catalog
Applications Clinical fingertip pulse oximetry, Hearables, Optical-HRM Number of input channels 1 Resolution (Bits) 22 Number of LEDs 3 Interface type I2C Operating temperature range (°C) -20 to 70 Rating Catalog
DSBGA (YZP) 15 4.8125 mm² 1.75 x 2.75
  • Transmitter:
    • Supports Common Anode LED Configuration
    • Dynamic Range: 100 dB
    • 6-Bit Programmable LED Current to 50 mA (Extendable to 100 mA)
    • Programmable LED On-Time
    • Simultaneous Support of 3 LEDs for Optimized SPO2, HRM, or Multi-Wavelength HRM
  • Receiver:
    • 24-Bit Representation of the Current Input from a Photodiode in Twos Complement Format
    • Individual DC Offset Subtraction DAC at TIA Input for Each LED and Ambient Phase
    • Digital Ambient Subtraction at ADC Output
    • Programmable Transimpedance Gain:
      10 kΩ to 2 MΩ
    • Dynamic Range: 100 dB
    • Average Current Less Than 200 µA for PPG Signal Acquisition
  • Pulse Frequency: 10 SPS to 1000 SPS
  • Flexible Pulse Sequencing and Timing Control
  • Flexible Clock Options:
    • External Clocking:
      4-MHz to 60-MHz Input Clock
    • Internal Clocking: 4-MHz Oscillator
  • I2C Interface
  • Operating Temperature Range: –20°C to 70°C
  • 2.6-mm × 1.6-mm DSBGA Package, 0.5-mm Pitch
  • Supplies: Rx: 2 V to 3.6 V, Tx: 3 V to 5.25 V,
    IO: 1.8 V to 3.6 V
  • Transmitter:
    • Supports Common Anode LED Configuration
    • Dynamic Range: 100 dB
    • 6-Bit Programmable LED Current to 50 mA (Extendable to 100 mA)
    • Programmable LED On-Time
    • Simultaneous Support of 3 LEDs for Optimized SPO2, HRM, or Multi-Wavelength HRM
  • Receiver:
    • 24-Bit Representation of the Current Input from a Photodiode in Twos Complement Format
    • Individual DC Offset Subtraction DAC at TIA Input for Each LED and Ambient Phase
    • Digital Ambient Subtraction at ADC Output
    • Programmable Transimpedance Gain:
      10 kΩ to 2 MΩ
    • Dynamic Range: 100 dB
    • Average Current Less Than 200 µA for PPG Signal Acquisition
  • Pulse Frequency: 10 SPS to 1000 SPS
  • Flexible Pulse Sequencing and Timing Control
  • Flexible Clock Options:
    • External Clocking:
      4-MHz to 60-MHz Input Clock
    • Internal Clocking: 4-MHz Oscillator
  • I2C Interface
  • Operating Temperature Range: –20°C to 70°C
  • 2.6-mm × 1.6-mm DSBGA Package, 0.5-mm Pitch
  • Supplies: Rx: 2 V to 3.6 V, Tx: 3 V to 5.25 V,
    IO: 1.8 V to 3.6 V

The AFE4404 is an analog front-end (AFE) for optical bio-sensing applications, such as heart-rate monitoring (HRM) and saturation of peripheral capillary oxygen (SpO2). The device supports three switching light-emitting diodes (LEDs) and a single photodiode. The current from the photodiode is converted into voltage by the transimpedance amplifier (TIA) and digitized using an analog-to-digital converter (ADC). The ADC code can be read out using an I2C interface. The AFE also has a fully-integrated LED driver with a 6-bit current control. The device has a high dynamic range transmit and receive circuitry that helps with the sensing of very small signal levels.

The AFE4404 is an analog front-end (AFE) for optical bio-sensing applications, such as heart-rate monitoring (HRM) and saturation of peripheral capillary oxygen (SpO2). The device supports three switching light-emitting diodes (LEDs) and a single photodiode. The current from the photodiode is converted into voltage by the transimpedance amplifier (TIA) and digitized using an analog-to-digital converter (ADC). The ADC code can be read out using an I2C interface. The AFE also has a fully-integrated LED driver with a 6-bit current control. The device has a high dynamic range transmit and receive circuitry that helps with the sensing of very small signal levels.
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類型 標題 日期
* Data sheet AFE4404 Ultra-Small, Integrated AFE for Wearable, Optical, Heart-Rate Monitoring and Bio-Sensing datasheet (Rev. D) PDF | HTML 2016年 12月 1日
User guide AFE4404 Development Guide (Rev. A) 2015年 12月 17日
Technical article Offset correction improves the next generation of heart-rate smart watches PDF | HTML 2015年 8月 24日

設計與開發

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開發板

AFE4404EVM — 適用於穿戴式光學心率監測的 AFE4404 超小型整合式 AFE 評估模組

The AFE4404EVM is intended for evaluating TI's AFE4404 device. The fully integrated AFE is ideally suited for pulse oximeter and heart rate monitoring applications.  It consists of a low noise receive channel and LED transmit section. The AFE4404 has a very highly configurable timing (...)

使用指南: PDF
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程式碼範例或展示

SBAC134 — I2C Interface Sample Code for AFE4404 in ST MCU Platform

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產品
生物感測 AFE
AFE4404 — 適用穿戴式光學心率監控和生物感測的超小型整合式 AFE
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驅動程式或資料庫

AFE4404SW-LINUX — AFE4404 Linux 驅動程式

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韌體

SLAC718 — AFE4404EVM Firmware Source v1.5

lock = 需要匯出核准 (1 分鐘)
支援產品和硬體

支援產品和硬體

產品
生物感測 AFE
AFE4404 — 適用穿戴式光學心率監控和生物感測的超小型整合式 AFE
硬體開發
開發板
AFE4404EVM — 適用於穿戴式光學心率監測的 AFE4404 超小型整合式 AFE 評估模組
lock 下載
開發模組 (EVM) 的 GUI

SLAC704 — AFE4404EVM GUI v1.2.2

lock = 需要匯出核准 (1 分鐘)
支援產品和硬體

支援產品和硬體

產品
生物感測 AFE
AFE4404 — 適用穿戴式光學心率監控和生物感測的超小型整合式 AFE
硬體開發
開發板
AFE4404EVM — 適用於穿戴式光學心率監測的 AFE4404 超小型整合式 AFE 評估模組
lock 下載
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PSpice® for TI is a design and simulation environment that helps evaluate functionality of analog circuits. This full-featured, design and simulation suite uses an analog analysis engine from Cadence®. Available at no cost, PSpice for TI includes one of the largest model libraries in the (...)
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DSBGA (YZP) 15 檢視選項
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