Phase-Isolated DAQ Reference Design for Simultaneous Capture of Voltage and Current
Description
This reference design showcases a data acquisition architecture that uses a dual channel SAR ADC paired with a digital isolator with integrated power converter to achieve phase isolated: simultaneous measurement of voltage and current. Accuracy of <0.3% is achieved using 12-bit: 2-channel: 750ksps ADC while the digital isolator isolates both data and power. An ARM® core MCU with multi-SPI peripherals is used to interface with ADC as it provides flexibility to the interface. A two-chip data acquisition architecture allows users to adapt the ADC performance to their dynamic range and resolution requirements.
Features
- Phase isolated simultaneous voltage and current measurement using highly integrated components.Simultaneous AC voltage and current measurement accuracy:– AC Voltage: Data acquisition specifications: 12-bit: 14-bit at 750ksps pin compatible ADC familyReinforced isolator at 100Mbps data rate with integrated power converterDigital processing specifications: ARM® 32-Bit Cortex®-M4F CPU for advanced measurement and monitoring computationsMulti-SPI interface with 8-channel DMA to interface with multiple ADCsPerformance vs. space trade-off using two-chip architecture
Applications
- Defense radio
- Land mobile radio
- Multifunction relay
- AC analog input module
- Binary input module
- Substation automation
- Circuit breaker (ACB
- MCCB
- VCB)
Product Categories
- Isolation