Nanochap BAF003 Analog Front-end on Disposable ECG Patches, Smaller Size and Longer Life
Electrocardiograph is widely used in modern society in the field of electrocardiogram detection and health testing equipment, in the monitoring of heart disease, daily health monitoring plays an important role, but due to heart disease being mostly episodic and sudden, health parameters are more needed to be continuously monitored in order to ensure the accuracy and stability of the data, so the disposable electrocardiogram sticker with the characteristics of portability, timeliness, and accuracy has come into being, which can not only It not only provides accurate heart health monitoring but also provides a convenient health management tool for daily life.
Fig.1
The power consumption and volume of the disposable ECG patch are very important technical parameters. Nanochap BAF003 has unique advantages in both aspects. First of all, its chip size is 2.4*2.48mm, which enables the product to be miniaturized and more convenient to wear. In addition, the chip has a very low sleep power consumption of <100nA, while the ECG operating power consumption is 39μA, which is about 30% lower than many products on the market. These advantages mean it has a longer battery life and can last longer.
The Nine Senses BAF003 is an ultra-low power analog front-end (AFE) designed to capture physiological signals. The chip features ultra-low power consumption and is suitable for biosignal monitoring in wearables and other electronics. The Nine Senses BAF003 can provide a high-precision monitoring solution and support the continuous monitoring of a wide range of health signal parameters. These parameters include electrocardiogram (ECG), electromyogram (EMG), pulse rate (PPG), body temperature, bioimpedance (BioZ), and biomarkers. For this reason, it is known as a 6-in-1 analog front end. By using the Nine Senses BAF003, accurate acquisition and monitoring of these physiological signals can be achieved, providing users with more accurate health monitoring and data analysis.
Fig.2 Chip structure diagram
Nanochap Nine Senses BAF003 analog front-end advantages and features
●Support 3V power supply application
●Leakage less than 15nA in disable mode.
●Ultra-low noise, high signal-to-noise ratio, two-stage programmable amplifier
●Acquisition circuit noise is less than 6μV
●Conversion accuracy of the effective number of bits to 16bit
Product parameters
●Supply voltage: 2.8V ~ 3.6V
●Package and size: WLCSP (2.4mm X 2.48mm), QFN36 (4 X 4mm)
●Op-amp bias voltage on-chip DAC (0.3V to 2V)
●Op-amp noise: 2.2μV (0.1~10Hz)
●On-chip TIA feedback resistor: 200K ~ 10M 16 steps
●ADC precision: 16bit
●Chip sleep power consumption: <100nA
●Standby current: <4μA
●Continuous sampling power consumption: <40μA
●Temperature Sensor: 0.1℃ accuracy
Fig.3 BAF003-25-3VECG acquisition typical application circuit
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