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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

AFE44I30

現行

適用具 FIFO 和 I2C 之穿戴式光學生物感測的超低功耗整合式類比前端 (AFE)

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產品規格表

AFE44I30

現行
產品規格表 立即訂購

產品詳細資料

Applications HRV, Hearables, Optical-HRM for wearables, SpO2, Vo2 max Number of input channels 4 Resolution (Bits) 22 Number of LEDs 6 Interface type I2C Operating temperature range (°C) -40 to 85 Rating Catalog
Applications HRV, Hearables, Optical-HRM for wearables, SpO2, Vo2 max Number of input channels 4 Resolution (Bits) 22 Number of LEDs 6 Interface type I2C Operating temperature range (°C) -40 to 85 Rating Catalog
DSBGA (YZ) 30 4.8 mm² 2.4 x 2
  • Supports signal acquisition of up to 24 phases
  • Flexible allocation of 6 LED, 4 PD in each phase
  • Simultaneous signal acquisition from different sensors at different data rates
  • Accurate, continuous heart-rate monitoring:
    • System SNR up to 108-dB at 16 µA PD current
    • Low current for continuous operation on a wearable device with a typical value: 15 µA for an LED, 20 µA for the receiver
  • Transmitter:
    • Supports common anode LED configuration
    • 8-Bit programmable LED current with range adjustable from 25 mA to 250 mA
    • Mode to fire two LEDs in parallel with independent per-phase current control
    • Programmable LED on-time per-phase
    • Simultaneous support of 6 LEDs for SpO2, HRM, or multi-wavelength HRM
  • Receiver:
    • Supports 4 time-multiplexed photodiode inputs
    • 2 parallel receivers (two sets of TIA/filter)
    • Individual ambient offset subtraction DAC at each TIA Input with 8-bit per-phase control and range adjustable up to 255-µA
    • Individual LED offset subtraction DAC at each TIA input with 5-bit per-phase control and 15.5-µA range
    • Close to 100 dB ambient rejection up to 10 Hz
    • Noise filtering with programmable bandwidth
    • Transimpedance Gain: 3.7 kΩ to 1 MΩ
  • Supports external clock and internal oscillator modes
  • Option to acquire data synchronized with a system master clock
  • Automatic cancellation of DC from ambient, LED
  • FIFO with 128-sample depth
  • I2C interface
  • 2.6-mm × 2.1-mm DSBGA, 0.4-mm pitch
  • Supplies: Rx: 1.7 V-1.9 V (LDO bypass); 1.9 V-3.6 V (LDO enabled), Tx: 3 V-5.5 V, IO: 1.7-3.6 V
  • Supports signal acquisition of up to 24 phases
  • Flexible allocation of 6 LED, 4 PD in each phase
  • Simultaneous signal acquisition from different sensors at different data rates
  • Accurate, continuous heart-rate monitoring:
    • System SNR up to 108-dB at 16 µA PD current
    • Low current for continuous operation on a wearable device with a typical value: 15 µA for an LED, 20 µA for the receiver
  • Transmitter:
    • Supports common anode LED configuration
    • 8-Bit programmable LED current with range adjustable from 25 mA to 250 mA
    • Mode to fire two LEDs in parallel with independent per-phase current control
    • Programmable LED on-time per-phase
    • Simultaneous support of 6 LEDs for SpO2, HRM, or multi-wavelength HRM
  • Receiver:
    • Supports 4 time-multiplexed photodiode inputs
    • 2 parallel receivers (two sets of TIA/filter)
    • Individual ambient offset subtraction DAC at each TIA Input with 8-bit per-phase control and range adjustable up to 255-µA
    • Individual LED offset subtraction DAC at each TIA input with 5-bit per-phase control and 15.5-µA range
    • Close to 100 dB ambient rejection up to 10 Hz
    • Noise filtering with programmable bandwidth
    • Transimpedance Gain: 3.7 kΩ to 1 MΩ
  • Supports external clock and internal oscillator modes
  • Option to acquire data synchronized with a system master clock
  • Automatic cancellation of DC from ambient, LED
  • FIFO with 128-sample depth
  • I2C interface
  • 2.6-mm × 2.1-mm DSBGA, 0.4-mm pitch
  • Supplies: Rx: 1.7 V-1.9 V (LDO bypass); 1.9 V-3.6 V (LDO enabled), Tx: 3 V-5.5 V, IO: 1.7-3.6 V

The AFE44I30 is an analog front-end for optical bio-sensing applications, such as heart-rate monitoring (HRM) and saturation of peripheral capillary oxygen (SpO2). The device supports up to six switching light-emitting diodes (LEDs) and up to four photodiodes. Up to 24 signal phases can be defined and the signal can be acquired from each phase in a synchronized manner. 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 stored in a 128-sample First in, First out (FIFO) block. The FIFO can be read out using a I2C interface. The AFE also has a fully-integrated LED driver with an 8-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 AFE44I30 is an analog front-end for optical bio-sensing applications, such as heart-rate monitoring (HRM) and saturation of peripheral capillary oxygen (SpO2). The device supports up to six switching light-emitting diodes (LEDs) and up to four photodiodes. Up to 24 signal phases can be defined and the signal can be acquired from each phase in a synchronized manner. 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 stored in a 128-sample First in, First out (FIFO) block. The FIFO can be read out using a I2C interface. The AFE also has a fully-integrated LED driver with an 8-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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* Data sheet AFE44I30 Ultra-Small, Integrated AFE With FIFO for Multi-Sensor Wearable, Optical Heart-Rate Monitoring and Bio-sensing datasheet PDF | HTML 2020年 2月 3日

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AFE44I30EVM — 適用於穿戴式光學、電生物感測的 AFE44I30 超低功耗整合式 AFE 評估模組

AFE44I30 評估模組 (EVM) 是一個用於加速和評估與 AFE44I30 產品相關的系統開發活動的平台。AFE44I30 為光學生物感測應用領域的類比前端 (AFE)，如心率監控 (HRM) 與周邊微血管含氧飽和度 (SpO2)。

AFE44I30 支援多達六個切換發光二極體 (LED) 和四個光二極體。最多可定義 24 個訊號相位，並以同步方式從每個相位取得訊號。光二極體電流透過轉阻放大器 (TIA) 轉換為電壓，並使用類比轉數位轉換器 (ADC) 進行數位化。ADC 程式碼可以儲存在具有可編程深度的 128 取樣 FIFO 中。可以對 FIFO (...)

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AFE44I3X-DESIGN — AFE44I30 and AFE44I31 design files

Ultra-low-power integrated analog front end (AFE) for wearable optical biosensing with FIFO and I2C
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生物感測 AFE
  • AFE44I30 — 適用具 FIFO 和 I2C 之穿戴式光學生物感測的超低功耗整合式類比前端 (AFE)
硬體開發
開發板
  • AFE44I30EVM — 適用於穿戴式光學、電生物感測的 AFE44I30 超低功耗整合式 AFE 評估模組
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DSBGA (YZ) 30 Ultra Librarian
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