MAX44299 Current & Voltage Sense Amplifier Maxim MAX44299 Current & Voltage Sense Amplifier is a low-side current, voltage and power monitoring circuit. This amplifier provides an analogue output current proportional to the measured current, voltage and the internally calculated instantaneous power. Instantaneous power is calculated internally by multiplying the load current and a fraction of the load voltage set by an external resistive divider. All three outputs are scaled to a full-scale current of 100µA. An additional output current of 100µA is available at the reference (REF) output. This additional current can be used to create a reference voltage for the ADC that is being used to measure the power, voltage and current signals.