A good PCB layout for the MAX3002EUP+ involves keeping the analog and digital grounds separate, using a solid ground plane, and minimizing the distance between the MAX3002EUP+ and the ECG electrodes. A 4-layer PCB with a dedicated analog ground plane is recommended.
To ensure EMI immunity, use a shielded enclosure, keep the MAX3002EUP+ away from sources of electromagnetic interference, and use a common-mode choke or ferrite bead on the power supply lines. Additionally, use a low-pass filter on the ECG signal lines to filter out high-frequency noise.
The recommended power-up sequence for the MAX3002EUP+ is to power up the analog supply (AVDD) first, followed by the digital supply (DVDD), and then the clock signal. This ensures that the analog circuitry is powered up before the digital circuitry.
To optimize the MAX3002EUP+ for low power consumption, use the lowest possible clock frequency, disable the internal oscillator and use an external clock source, and use the power-down mode when not in use. Additionally, use a low-power microcontroller and optimize the firmware to minimize power consumption.
The recommended method for ECG signal filtering with the MAX3002EUP+ is to use a 5th-order Butterworth filter with a cutoff frequency of around 150 Hz to remove high-frequency noise and motion artifacts.
MAX3002EUP+ datasheet
by Maxim Integrated Products
