EVALST-3PHISOSD evaluation board implements a complete 3-phase current meter with low-cost shunt current sensors. The solution is based on the ISOSD61 device, a single channel, galvanically isolated, second order sigma-delta modulator, measuring current for each phase through a shunt current sensor. Sensing circuitry and PCB layout are optimized to maximize signal-to-noise ratio for optimal accuracy. The ISOSD61 oversamples the signal using a clock (up to 15 MHz) distributed in a synchronized way by the microcontroller and outputs the current sigma-delta bitstreams. The firmware embedded in the solution exploits the DFSDM filters of the STM32F413RH to convert the three bitstreams into 24-bit current data, at a selectable sampling rate. The firmware also implements a virtual COM port communication to easily access the internal parameters to read data and to calibrate the board.
- 3 channels current decimated samples available
- Sampling frequency and measurement bandwidth selectable
- Communication through USB in virtual COM port mode with shell commands
- 6 kV galvanic isolation between the phases with 8 mm creepage and clearance
Other details
| Brand |
STMICROELECTRONICS |
| Part Number |
EVALST-3PHISOSD |
| Quantity |
Each |
| Technical Data Sheet EN |
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