Packaging information
| Package | Pins DSBGA (YBG) | 36 |
| Operating temperature range (°C) -40 to 85 |
| Package qty | Carrier 3,000 | LARGE T&R |
Features for the AFE4960
- 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
Description for the AFE4960
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.