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AFE4960

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Two-channel ECG analog front end with integrated respiration and pace detection

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Data sheet

AFE4960

ACTIVE
Data sheet Order now

Product details

Applications 1-lead ECG, 3-lead ECG, 5-lead ECG, ECG patch, EEG, Patient monitoring Number of input channels 2 Resolution (Bits) 22 Interface type I2C, SPI Operating temperature range (°C) -40 to 85 Rating Catalog
Applications 1-lead ECG, 3-lead ECG, 5-lead ECG, ECG patch, EEG, Patient monitoring Number of input channels 2 Resolution (Bits) 22 Interface type I2C, SPI Operating temperature range (°C) -40 to 85 Rating Catalog
DSBGA (YBG) 36 5.76 mm² 2.4 x 2.4
  • 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
  • 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 2~12
    • >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
  • 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
  • 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
  • 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 2~12
    • >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
  • 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

The AFE4960 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. A Right Leg Drive (RLD) amplifier output, can be used to set the body bias. The AFE has DC lead biasing for lead on/off detection, and AC lead biasing for measuring the lead impedance. 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 AFE4960 is a fully integrated solution to realize a 3-lead ECG system. Synchronized operation of two AFEs in parallel can be used to realize a 5-lead ECG.

The AFE4960 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. A Right Leg Drive (RLD) amplifier output, can be used to set the body bias. The AFE has DC lead biasing for lead on/off detection, and AC lead biasing for measuring the lead impedance. 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 AFE4960 is a fully integrated solution to realize a 3-lead ECG system. Synchronized operation of two AFEs in parallel can be used to realize a 5-lead ECG.
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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 (Rev. A) PDF | HTML 07 Mar 2022
Application brief Wearable EEG (Electroencephalography) (Rev. B) PDF | HTML 30 Oct 2023
Application brief Remote Patient Monitoring PDF | HTML 30 Nov 2022
Application brief ECG Signal Acquisition on Wearables PDF | HTML 15 Nov 2022
Application brief Analog Front End for 3-Lead and 5-Lead ECG (Rev. A) PDF | HTML 20 Apr 2022

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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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