Description:
The AD8232 is a highly integrated, low-power, and cost-effective heart rate monitor module designed by Analog Devices. It is specifically designed for measuring the electrical activity of the heart and extracting heart rate and cardiac-related parameters. The AD8232 module consists of three main components: the analog front end (AFE), the amplification circuitry, and the output signal processing stage. The AFE is responsible for capturing the electrical signals generated by the heart and preparing them for further processing. It includes a programmable gain amplifier (PGA) that amplifies the weak electrical signals from the body and filters out unwanted noise and interference. The amplified signals are then passed through a high-pass filter to remove any DC offset or baseline wandering. This ensures that only the AC component, representing the heart's electrical activity, is retained for analysis.
Specification:
- Input Channels: The module has two input channels, allowing for differential measurements of the heart's electrical activity.
- Input Impedance: The input impedance is typically 2.5 M Ohm, ensuring minimal interference and signal degradation.
- Input Bias Current: The typical input bias current is 50 nA, ensuring accurate measurement of the weak electrical signals.
- Supply Voltage: The module operates within a supply voltage range of 2.0V to 3.5V, making it compatible with a wide range of power sources.