AFE4960P Series
Two-channel ECG and PPG analog front end with integrated respiration and pace detection
Manufacturer: Texas Instruments
Catalog
Two-channel ECG and PPG 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 parallelPPG signal chain for SpO2, Heart rate and PTTECG 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 approximately 2 to 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 channelPPG Signal ChainSupports acquisition of up to 24 PPG signalsFlexible allocation of 4 LED, 4 PD in each phase8-Bit LED Current control up to 250 mALow noise current DAC at input to cancel DCTrans-impedance Gain: 3.7 kΩ to 1 MΩFilter to reduce sensor’s optical noise bandwidthExternal 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 , Tx: 3.0-5.5 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 parallelPPG signal chain for SpO2, Heart rate and PTTECG 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 approximately 2 to 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 channelPPG Signal ChainSupports acquisition of up to 24 PPG signalsFlexible allocation of 4 LED, 4 PD in each phase8-Bit LED Current control up to 250 mALow noise current DAC at input to cancel DCTrans-impedance Gain: 3.7 kΩ to 1 MΩFilter to reduce sensor’s optical noise bandwidthExternal 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 , Tx: 3.0-5.5 V
Description
AI
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.
