A wide range I2C system monitor that monitors the current, voltage and power of any 0V to 80V rail has been developed by Linear Technology Corporation.
In many cases, prior power monitoring solutions are limited at 3V to 5V supplies and monitor voltages less than 36V, requiring additional circuitry to monitor higher voltages. The company’s LTC2945 has flexible power supply options, deriving power from a 4V to 80V monitored supply, a 2.7V to 80V secondary supply, or from the onboard shunt regulator.
These supply options eliminate the need for a separate buck regulator, shunt regulator or inefficient resistive divider while monitoring any 0V to 80V rail.
This device is a simple, single-IC solution that uses an internal Delta Sigma ADC and multiplier to provide 12-bit current and voltage measurements and 24-bit power readings. It has a wide operating range that is ideal for many applications.
Linear Technology Corporation
