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AFE4510

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Ultra-small integrated AFE for bioimpedance analysis, electrical and optical biosensing

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Data sheet

AFE4510

ACTIVE
Data sheet Order now

Product details

Applications 1-lead ECG, Dry electrode ECG, Impedance spectroscopy, Optical-HRM 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 1-lead ECG, Dry electrode ECG, Impedance spectroscopy, Optical-HRM 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 (YBG) 42 7.606386 mm² 2.997 x 2.538
  • Integrated signal chains for Bio-Z, EDA, ECG, PPG
  • Synchronized ECG, PPG enables PTT-based BP
  • Bio-Z signal acquisition:
    • Multi-frequency Body impedance Analysis with frequency programmable up to 250kHz
    • Low frequency excitation mode for EDA/GSR
    • Complex (I, Q). Tetrapolar impedance measurement
    • Sine-wave excitation with a 7-bit DAC
    • Calibration scheme to compensate for electrode impedance and achieve accurate BioZ
  • ECG signal acquisition:
    • 1-lead ECG signal acquisition up to 4kHz
    • Mode to configure as 2-channel ECG
    • INA gain programmable from 1.27 - 12.23
    • RLD output to set body bias through the third electrode
    • Input noise (0.5-150Hz): 0.5µVrms at gain of 12.23
    • >1GΩ input impedance, CMRR>100dB
    • Integrated 370 Hz anti-aliasing low pass filter
    • AC, DC lead-off detect: 1.6nA to 1µA
  • PPG signal acquisition:
    • Acquisition of 24 PPG signal sets (LED, AMB)
    • Supports PPG sensors at different data rates
    • Peak system SNR of 115 dB in 0.5-10Hz band enables high-accuracy SpO2 measurement
    • Low Current for Continuous Operation with a Typical Value: 19µA for the Receiver
  • PPG Transmitter:
    • 8-Bit Programmable LED Current with a range adjustable from 50mA to 300mA
    • LED Short Detection
    • Support of 16 LEDs in Common Anode configuration for SpO2, OHRM, Spectroscopy
  • PPG Receiver:
    • Supports 5 PDs, 4 parallel receive paths
    • Noise filtering with programmable bandwidth
    • Trans-impedance Gain: 3.7kΩ to 1MΩ
    • 8-bit Ambient Offset Subtraction DAC up to 256µA
    • 9-bit LED Offset Subtraction DAC up to 64µA
    • Digital Ambient Subtraction at ADC Output
  • EDA Signal Acquisition:
    • Low-power continuous EDA and PPG acquisition using the ECG receiver
    • Independent data rates for EDA and PPG acquisition with optimized power cycling
    • High-accuracy EDA signal chain for spot-check EDA using the BIA signal chain
  • Supports external clock and internal oscillator
  • Option to operate 2 AFEs in parallel
  • Option to configure the 5th PD input as a general purpose voltage measurement channel
  • FIFO with 384-sample Depth, SPI™
  • Supplies: RX,:1.7-1.9V, I/O: 1.15-1.9V, TX:3-5.5V
  • Integrated signal chains for Bio-Z, EDA, ECG, PPG
  • Synchronized ECG, PPG enables PTT-based BP
  • Bio-Z signal acquisition:
    • Multi-frequency Body impedance Analysis with frequency programmable up to 250kHz
    • Low frequency excitation mode for EDA/GSR
    • Complex (I, Q). Tetrapolar impedance measurement
    • Sine-wave excitation with a 7-bit DAC
    • Calibration scheme to compensate for electrode impedance and achieve accurate BioZ
  • ECG signal acquisition:
    • 1-lead ECG signal acquisition up to 4kHz
    • Mode to configure as 2-channel ECG
    • INA gain programmable from 1.27 - 12.23
    • RLD output to set body bias through the third electrode
    • Input noise (0.5-150Hz): 0.5µVrms at gain of 12.23
    • >1GΩ input impedance, CMRR>100dB
    • Integrated 370 Hz anti-aliasing low pass filter
    • AC, DC lead-off detect: 1.6nA to 1µA
  • PPG signal acquisition:
    • Acquisition of 24 PPG signal sets (LED, AMB)
    • Supports PPG sensors at different data rates
    • Peak system SNR of 115 dB in 0.5-10Hz band enables high-accuracy SpO2 measurement
    • Low Current for Continuous Operation with a Typical Value: 19µA for the Receiver
  • PPG Transmitter:
    • 8-Bit Programmable LED Current with a range adjustable from 50mA to 300mA
    • LED Short Detection
    • Support of 16 LEDs in Common Anode configuration for SpO2, OHRM, Spectroscopy
  • PPG Receiver:
    • Supports 5 PDs, 4 parallel receive paths
    • Noise filtering with programmable bandwidth
    • Trans-impedance Gain: 3.7kΩ to 1MΩ
    • 8-bit Ambient Offset Subtraction DAC up to 256µA
    • 9-bit LED Offset Subtraction DAC up to 64µA
    • Digital Ambient Subtraction at ADC Output
  • EDA Signal Acquisition:
    • Low-power continuous EDA and PPG acquisition using the ECG receiver
    • Independent data rates for EDA and PPG acquisition with optimized power cycling
    • High-accuracy EDA signal chain for spot-check EDA using the BIA signal chain
  • Supports external clock and internal oscillator
  • Option to operate 2 AFEs in parallel
  • Option to configure the 5th PD input as a general purpose voltage measurement channel
  • FIFO with 384-sample Depth, SPI™
  • Supplies: RX,:1.7-1.9V, I/O: 1.15-1.9V, TX:3-5.5V

The AFE4510 is a versatile signal acquisition system that supports acquiring PPG, EDA, ECG, and Bio-impedance signals. A PPG signal chain comprises a current driver for LEDs and a receiver that senses the signal from PDs. An ECG receiver with a Right-leg drive (RLD) can acquire a single-lead ECG from a pair of electrodes. An impedance measurement signal chain with integrated excitation & sense can be used for applications like BIA, EDA, and Impedance spectroscopy. The outputs of the various signal chains are digitized by a common ADC and stored in a FIFO which can be read out using an SPI interface

The AFE4510 is a versatile signal acquisition system that supports acquiring PPG, EDA, ECG, and Bio-impedance signals. A PPG signal chain comprises a current driver for LEDs and a receiver that senses the signal from PDs. An ECG receiver with a Right-leg drive (RLD) can acquire a single-lead ECG from a pair of electrodes. An impedance measurement signal chain with integrated excitation & sense can be used for applications like BIA, EDA, and Impedance spectroscopy. The outputs of the various signal chains are digitized by a common ADC and stored in a FIFO which can be read out using an SPI interface
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* Data sheet AFE4510 Ultra Small, Integrated AFE for Bio Impedance Analysis, Electrical Bio Sensing & Optical Bio Sensing datasheet PDF | HTML 21 Mar 2024

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