AFE159x Low-Power, 4-Channel, 24-Bit Analog Front-Ends for Bio-Potential Measurements

1 Features

Integrated Signal Chain for ECG, Pace Detection, and Respiration Measurement
ECG Receiver
- Four high resolution channels at low power of 0.42mW/channel
- Flexible four leads selectable from six electrodes
- Programmable gain: 1.25 to 9
- Input-referred noise: 4μV_PP in 150Hz BW
- Differential input range: ±1V with Gain = 4
- CMRR: -140dB
- Data rate: 125SPS to 128kSPS
Pace Detection
- On-chip digital pace detection algorithm on programmable two leads
- High-speed 128kSPS pace output on two channels for software pace detection
Respiration
- Low-noise of 24mΩ_PP with 2kΩ body impedance and 1kΩ defibrillator protection resistor on each electrode
- Supports Sine and Square wave excitation
Other Features
- Built-in right leg drive amplifier steerable to any electrode
- DC lead-off detection, AC lead impedance detection, Wilson Center Terminal (WCT), Goldberger Central Terminals (GCT), test signals
- Battery voltage monitoring
- Flexible power-down and standby modes
- Built-in oscillator, PLL, and reference
- 1k sample main FIFO and 2k sample pace FIFO
- SPI-compatible serial interface
- Analog supply voltage 1: 3.15V to 5.25V
- Analog supply voltage 2: 1.7V to 1.9V
- I/O supply voltage: 1.65V to 3.6V
Supports systems meeting AAMI EC11, AMI EC13, AMI EC38, IEC60601-1, IEC60601-2-25, IEC60601-2-27, and IEC60601-2-51 standards

Medical instrumentation (ECG, EMG, and EEG):
- Bedside patient monitoring and diagnostic ECG
- Portable telemetry
- Holter monitor and multi-lead patch
Event, stress, and vital sign monitors:
- ECGs
- AEDs
- Telemedicine Bispectral Index (BIS)
- Evoked Audio Potential (EAP)
- Sleep study monitor