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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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Technical documentation

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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
Design guide Biosensing Patch Reference Design for Continuous Vital Sign Monitoring With Bluetooth® Low Energy PDF | HTML 08 Nov 2024
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

Design & development

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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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Simulation tool

PSPICE-FOR-TI — PSpice® for TI design and simulation tool

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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Reference designs

TIDA-010270 — Biosensing patch reference design for continuous vital sign monitoring with Bluetooth® Low Energy

The biosensing patch reference design provides a platform to evaluate our latest products for continuous monitoring of vital signs such as electrocardiogram (ECG), heart rate, respiration, pace pulse, temperature and motion. The design uses the AFE4960 for accurate single-lead ECG signal (...)
Design guide: PDF
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DSBGA (YBG) 36 Ultra Librarian
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