AFE44S30

활성

FIFO 및 SPI를 지원하는 웨어러블 광학 바이오센싱용 초저전력 통합 AFE(아날로그 프론트 엔드)

제품 상세 정보

Applications HRV, Hearables, Optical-HRM for wearables, SpO2, Vo2 max Number of input channels 4 Resolution (Bits) 22 Number of LEDs 8 Interface type SPI 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 8 Interface type SPI Operating temperature range (°C) -40 to 85 Rating Catalog
DSBGA (YZ) 30 4.8 mm² (— mm × — mm)
  • Supports signal acquisition of up to 24 phases
  • Flexible allocation of 8 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 8 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
  • SPI 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 8 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 8 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
  • SPI 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 AFE44S30 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 eight 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 SPI 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 AFE44S30 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 eight 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 SPI 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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추가 정보 요청

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기술 자료

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2개 모두 보기
상위 문서 유형 직함 형식 옵션 최신 영어 버전 다운로드 날짜
* 데이터 시트 AFE44S30 Ultra-Small, Integrated AFE With FIFO for Multi-Sensor Wearable, Optical Heart-Rate Monitoring and Bio-Sensing datasheet PDF | HTML 2019. 11. 25
인증서 AFE44S30EVM EU Declaration of Conformity (DoC) PDF | HTML 2024. 5. 6

설계 및 개발

추가 조건 또는 필수 리소스는 사용 가능한 경우 아래 제목을 클릭하여 세부 정보 페이지를 확인하세요.

평가 보드

AFE44S30EVM — FIFO 및 SPI 평가 모듈이 있는 웨어러블 광학 바이오센싱용 AFE4430 통합 AFE

AFE44S30 평가 모듈(EVM)은 HRM(심박수 모니터링) 및 SpO2(주변 모세혈관 산소포화도)와 같은 광학 바이오센싱 애플리케이션을 위한 AFE(아날로그 프론트 엔드)인 AFE44S30 장치를 평가하기 위한 플랫폼입니다. AFE44S30은 8개의 스위칭 LED(발광 다이오드)와 4개의 포토다이오드를 지원합니다. 포토다이오드의 전류는 TIA(트랜스임피던스 증폭기)를 통해 전압으로 변환된 후 ADC(아날로그-디지털 컨버터)를 사용하여 디지털화됩니다. ADC 코드는 프로그래밍 가능한 깊이를 지원하는 128샘플 FIFO에 저장할 (...)

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