As a digital power monitor, the ISL28023 integrates in a single IC the discrete amplifier and ADC that would otherwise be required to take current and voltage readings across a shunt resistor, and provides a digital output, including a calculated power reading, to an MCU or FPGA.
The ISL28023 is ideal for motor-control applications: the current and power measurements that the ISl28023 yields are valuable in determining the efficiency and health of a motor. The device provides tight accuracy of 0.05% for voltage and current measurements. An auxiliary input provides an additional monitoring function.
Power can either be externally supplied to the ISL28023 or internally regulated. The device has a primary channel which allows for voltage and current measurements ranging from 0V to 60V, whether the voltage applied is direct or a common mode to the port. The high voltage measurements are achieved while the device is powered at between 3V to 5.5V.
This wide voltage-acceptance range is useful in many industrial, infrastructure and automotive applications.
An 8-bit voltage DAC supports output voltage margining in DC-DC converters. In addition, the ISL28023 has fast fault indicators for current and voltage, enabling a short shutdown delay for effective protection of the measured circuitry. The ISL28023 has an internal temperature sensor and a remote temperature-sensor option.
The ISL28023 is PMBus-compliant and the serial interface operates at voltages as low as 1.2V, enabling communications to many energy-harvesting applications. The device draws an average current of just 800μA.
- Industrial motors
- Data-processing servers
- DC power distribution
- Telecoms equipment
- Portable communications equipment
- DC-DC and AC-DC converters
- Battery management
- ±1.0°C internal temperature-sensor accuracy
- Programmable averaging modes
- 55 I2C slave addresses
- Operating temperature: range: -40°C to 125°C