How to choose a power supply for analog devices such as current, grid monitoring, and precision CT? (Current Measurement-Grid Monitoring Precision CT Measurement User Guide)

Answer

manuals.plus

Feb 24, 2025 - 12:22 AM

To select the appropriate power supply for the ANALOG DEVICES Current Measurement-Grid Monitoring Precision CT Measurement, you need to consider the power requirements mentioned in the user guide. The power requirements are divided into different stages, including Filter, ADC, Isolation, and Reference.

For each stage, the user guide provides the required supply voltage and supply current. Here are the power requirements for each stage:

1. Filter:

- Supply Voltage: 5V

- Supply Current: 47.5mA

2. ADC:

- Supply Voltage: 3.3V

- Supply Current: 1.5mA

3. Isolation:

- Supply Voltage: 5V

- Supply Current: 25mA

4. Reference:

- Supply Voltage: 5V

- Supply Current: 12mA

It's important to note that these values are for typical applications and the actual supply current requirement may vary depending on the number of channels on the signal chain.

To select the appropriate power supply, you need to ensure that the supply voltage matches the requirements for each stage. Additionally, you should consider the maximum quiescent current of the supply rails, as mentioned in the user guide.

For more detailed information on power supply rejection ratio (PSRR) and power dissipation, you can refer to the corresponding datasheets of the signal chain components mentioned in the user guide.

By considering these power requirements and specifications, you can select a suitable power supply for the ANALOG DEVICES Current Measurement-Grid Monitoring Precision CT Measurement.