Product details

Applications 1-lead ECG, 3-lead ECG, 5-lead ECG, HRV, Optical-HRM, Optical-HRM for wearables, Patient monitoring, Respiration, Sleep study monitor, SpO2, Vo2 max Number of input channels 6 Resolution (Bits) 22 Number of LEDs 4 Interface type Photodiode, Electrodes Operating temperature range (C) -40 to 85
Applications 1-lead ECG, 3-lead ECG, 5-lead ECG, HRV, Optical-HRM, Optical-HRM for wearables, Patient monitoring, Respiration, Sleep study monitor, SpO2, Vo2 max Number of input channels 6 Resolution (Bits) 22 Number of LEDs 4 Interface type Photodiode, Electrodes Operating temperature range (C) -40 to 85
DSBGA (YBG) 36 7 mm² 2.6 x 2.6
  • Supports ECG and respiration impedance measurement; configurable as 2-channel ECG or 1-channel ECG + 1-channel respiration
  • Can be used in IEC 60601-2-47:2012/(R)2016 and IEC 60601-2-27:2011(R)2016 compliant systems
  • 222 µA/channel while operating as 2-channel ECG
  • Integrated Pace pulse detection on 1 channel
  • Supports a 3-lead ECG, extendable to 5 leads or higher by operating two or more AFEs in parallel
  • PPG signal chain for SpO2, Heart rate and PTT
  • ECG signal chain:
    • Single channel ECG acquisition up to 2.048 kHz
    • 2 channel ECG acquisition up to 1.36 kHz/channel
    • RLD output to set body bias through third electrode
    • Programmable INA gain from approximately 2 to 12
    • >1 GΩ input impedance, CMRR > 100 dB
    • Input noise (0.5-150 Hz): 13 µVpp at INA gain of 3; 5 µVpp at INA gain of 12
    • Integrated 370 Hz anti-aliasing low pass filter
    • Mode for continuous lead on/off detection
    • Mode for lead impedance measurement
  • Bio-Z signal chain:
    • Measurement of Bio-impedance over excitation frequency from 30 kHz to 100 kHz
    • Sine wave or square wave excitation
    • Respiration impedance measurement: 45 mΩ-pp noise on a baseline impedance of 2 kΩ
  • Dual channel ECG channel:
    • Bio-Z receiver configurable as a 2nd ECG channel
  • PPG Signal Chain
    • Supports acquisition of up to 24 PPG signals
    • Flexible allocation of 4 LED, 4 PD in each phase
    • 8-Bit LED Current control up to 250 mA
    • Low noise current DAC at input to cancel DC
    • Trans-impedance Gain: 3.7 kΩ to 1 MΩ
    • Filter to reduce sensor’s optical noise bandwidth
  • External clock and internal oscillator modes
  • FIFO with 128-sample Depth, 24-bit word
  • SPITM, I2C interfaces: Selectable by pin
  • 2.6-mm × 2.6-mm DSBGA, 0.4-mm Pitch
  • Supplies: Rx:1.7-1.9 V, IO:1.7-1.9 V , Tx: 3.0-5.5 V
  • Supports ECG and respiration impedance measurement; configurable as 2-channel ECG or 1-channel ECG + 1-channel respiration
  • Can be used in IEC 60601-2-47:2012/(R)2016 and IEC 60601-2-27:2011(R)2016 compliant systems
  • 222 µA/channel while operating as 2-channel ECG
  • Integrated Pace pulse detection on 1 channel
  • Supports a 3-lead ECG, extendable to 5 leads or higher by operating two or more AFEs in parallel
  • PPG signal chain for SpO2, Heart rate and PTT
  • ECG signal chain:
    • Single channel ECG acquisition up to 2.048 kHz
    • 2 channel ECG acquisition up to 1.36 kHz/channel
    • RLD output to set body bias through third electrode
    • Programmable INA gain from approximately 2 to 12
    • >1 GΩ input impedance, CMRR > 100 dB
    • Input noise (0.5-150 Hz): 13 µVpp at INA gain of 3; 5 µVpp at INA gain of 12
    • Integrated 370 Hz anti-aliasing low pass filter
    • Mode for continuous lead on/off detection
    • Mode for lead impedance measurement
  • Bio-Z signal chain:
    • Measurement of Bio-impedance over excitation frequency from 30 kHz to 100 kHz
    • Sine wave or square wave excitation
    • Respiration impedance measurement: 45 mΩ-pp noise on a baseline impedance of 2 kΩ
  • Dual channel ECG channel:
    • Bio-Z receiver configurable as a 2nd ECG channel
  • PPG Signal Chain
    • Supports acquisition of up to 24 PPG signals
    • Flexible allocation of 4 LED, 4 PD in each phase
    • 8-Bit LED Current control up to 250 mA
    • Low noise current DAC at input to cancel DC
    • Trans-impedance Gain: 3.7 kΩ to 1 MΩ
    • Filter to reduce sensor’s optical noise bandwidth
  • External clock and internal oscillator modes
  • FIFO with 128-sample Depth, 24-bit word
  • SPITM, I2C interfaces: Selectable by pin
  • 2.6-mm × 2.6-mm DSBGA, 0.4-mm Pitch
  • Supplies: Rx:1.7-1.9 V, IO:1.7-1.9 V , Tx: 3.0-5.5 V

The AFE4960P supports synchronized signal acquisition of ECG, PPG and bio-impedance signals. A PPG signal chain comprises of a current driver for LEDs and a receiver that senses the signal from PDs. The AFE can be configured as either a 2-channel ECG receiver or as a 1-channel ECG receiver and a Respiration impedance channel. The AFE signal chains can interface in a flexible manner to up to 4 electrodes. The AFE has AC and DC Lead biasing and lead on/off detection. Pacemaker pulse detection is supported on one channel. All the signal chain outputs are converted by a single ADC in well-defined time slots and stored as 24-bit words in a 128-sample FIFO which can be read out using a SPI or an I2C interface. The AFE4960P can be used to realize a 3-lead ECG system along with SpO2.

The AFE4960P supports synchronized signal acquisition of ECG, PPG and bio-impedance signals. A PPG signal chain comprises of a current driver for LEDs and a receiver that senses the signal from PDs. The AFE can be configured as either a 2-channel ECG receiver or as a 1-channel ECG receiver and a Respiration impedance channel. The AFE signal chains can interface in a flexible manner to up to 4 electrodes. The AFE has AC and DC Lead biasing and lead on/off detection. Pacemaker pulse detection is supported on one channel. All the signal chain outputs are converted by a single ADC in well-defined time slots and stored as 24-bit words in a 128-sample FIFO which can be read out using a SPI or an I2C interface. The AFE4960P can be used to realize a 3-lead ECG system along with SpO2.

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Type Title Date
* Data sheet AFE4960 Two-Channel ECG, Respiration and Pace Pulse Detection Analog Front End (AFE) for Clinical Wearables datasheet PDF | HTML 13 May 2022
Technical article Offset correction improves the next generation of heart-rate smart watches 24 Aug 2015
Technical article A new way to illuminate the human condition 30 Dec 2013
Technical article Oximeter signaling: There’s more than meets the eye 04 Dec 2013
Technical article Virtual hospital implementation using a worn health monitor 13 Nov 2013

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Evaluation board

AFE4960EVM — AFE4960 evaluation module for two-channel ECG AFE with integrated respiration and pace detection

The AFE4960 evaluation module (EVM) is a platform for evaluating the AFE4960 biosensing analog front end (AFE), which supports synchronized signal acquisition of electrocardiogram (ECG) and bioimpedance signals.

AFE4960 can be configured as either a two-channel ECG receiver or as a one-channel ECG (...)

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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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