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This verified design can accurately measure current, voltage and power on a bus that carries -48V and is able to provide this data using an I²C compatible interface. This design is targeted for Telecom applications because the most common Telecom equipment’s are fed with this negative supply voltage. It uses INA226 and ISO1541. The INA226 is a current shunt and power monitor with an I²C compatible interface. This device will precisely take these measurements and will use ISO1541 to translate the negative voltage to ground referenced signals. The ISO1541 is a low-power, bidirectional I²C compatible isolator.
- Ability to report current, voltage and power on a bus that carries -48V
- High Accuracy:
- 10µV Offset (Max)
- 0.1% Gain Error (Max)
- I²C compatible interface
- Isolation friendly for board to board communication
- I²C compatible isolation translates -48V reference to ground referenced signals