AFE4960 Series
Two-channel ECG analog front end with integrated respiration and pace detection
Manufacturer: Texas Instruments
Catalog
Two-channel ECG analog front end with integrated respiration and pace detection
Key Features
• Supports ECG and respiration impedance measurement; configurable as 2-channel ECG or 1-channel ECG + 1-channel RespirationCan be used in IEC 60601-2-47:2012/(R)2016 and IEC 60601-2-27:2011(R)2016 compliant systems222 µA/channel while operating as 2-channel ECGIntegrated Pace pulse detection on 1 channelSupports a 3-lead ECG, extendable to 5 leads or higher by operating two or more AFEs in parallelECG signal chain:Single channel ECG acquisition up to 2.048 kHz2 channel ECG acquisition up to 1.36 kHz/channelRLD output to set body bias through third electrodeProgrammable INA gain from 2~12>1 GΩ input impedance, CMRR > 100 dBInput noise (0.5-150 Hz): 13 µVpp at INA gain of 3; 5 µVpp at INA gain of 12Integrated 370 Hz anti-aliasing low pass filterMode for Continuous lead on/off detectionMode for Lead impedance measurementBio-Z signal chain:Measurement of Bio-impedance over excitation frequency from 30 kHz to 100 kHzSine wave or square wave excitationRespiration impedance measurement: 45 mΩ-pp noise on a baseline impedance of 2 kΩDual channel ECG channel:Bio-Z receiver configurable as a 2ndECG channelExternal clock and internal oscillator modesFIFO with 128-sample Depth, 24-bit wordSPITM, I2C interfaces: Selectable by pin2.6-mm × 2.6-mm DSBGA, 0.4-mm PitchSupplies: Rx:1.7-1.9 V, IO:1.7-1.9 VSupports ECG and respiration impedance measurement; configurable as 2-channel ECG or 1-channel ECG + 1-channel RespirationCan be used in IEC 60601-2-47:2012/(R)2016 and IEC 60601-2-27:2011(R)2016 compliant systems222 µA/channel while operating as 2-channel ECGIntegrated Pace pulse detection on 1 channelSupports a 3-lead ECG, extendable to 5 leads or higher by operating two or more AFEs in parallelECG signal chain:Single channel ECG acquisition up to 2.048 kHz2 channel ECG acquisition up to 1.36 kHz/channelRLD output to set body bias through third electrodeProgrammable INA gain from 2~12>1 GΩ input impedance, CMRR > 100 dBInput noise (0.5-150 Hz): 13 µVpp at INA gain of 3; 5 µVpp at INA gain of 12Integrated 370 Hz anti-aliasing low pass filterMode for Continuous lead on/off detectionMode for Lead impedance measurementBio-Z signal chain:Measurement of Bio-impedance over excitation frequency from 30 kHz to 100 kHzSine wave or square wave excitationRespiration impedance measurement: 45 mΩ-pp noise on a baseline impedance of 2 kΩDual channel ECG channel:Bio-Z receiver configurable as a 2ndECG channelExternal clock and internal oscillator modesFIFO with 128-sample Depth, 24-bit wordSPITM, I2C interfaces: Selectable by pin2.6-mm × 2.6-mm DSBGA, 0.4-mm PitchSupplies: Rx:1.7-1.9 V, IO:1.7-1.9 V
Description
AI
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.
