Texas Instruments INA4230 16-Bit Digital Current Monitor

The INA4230 features programmable ADC conversion times and averaging that is common for all channels. Each channel has a programmable calibration value with an internal multiplier that enables direct readouts of power in watts, current in amperes, and energy in joules. Each channel monitors the bus voltage on the IN– pin and can alert on overcurrent and undercurrent conditions, as well as on overvoltage and undervoltage conditions. High input impedance while in current measurement mode allows the use of larger current sense resistors needed to measure small value system currents.

The Texas Instruments INA4230 senses current on common-mode bus voltages that can vary from –0.3V to 48V, independent of the supply voltage. The device operates from a single 1.7V to 5.5V supply, drawing a typical supply current of 400µA in normal operation. Where the typical operating current is 2.5µA, the device can be placed in a low-power standby mode and can be fully disabled using the enable pin to achieve a supply current of less than 1µA. The device features 16 programmable addresses and is specified over the operating temperature range between –40°C and 125°C.