Startseite Datenwandler Integrierte & Spezialfunktions-Datenwandler Medizinische AFEs Biosensorik-AFEs
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Medizinische AFEs
Biosensorik-AFEs

AFE44S30

AKTIV

Ultra-Low-Power integriertes Analog-Frontend (AFE) für optische Wearable-Biosensorik mit FIFO und SP

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Datenblatt

AFE44S30

AKTIV
Datenblatt Jetzt bestellen

Produktdetails

Applications HRV, Optical-HRM, 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, Optical-HRM, 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 2.4 x 2
  • 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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* Data sheet AFE44S30 Ultra-Small, Integrated AFE With FIFO for Multi-Sensor Wearable, Optical Heart-Rate Monitoring and Bio-Sensing datasheet PDF | HTML 25 Nov 2019
Certificate AFE44S30EVM EU Declaration of Conformity (DoC) 06 Mai 2024

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