INA236 16-bit Digital Current Monitor Texas Instruments INA236 16-bit Digital Current Monitor with an I2C/SMBus-compatible interface is compliant with a wide range of digital bus voltages, including 1.2V, 1.8V, 3.3V, and 5.0V. The INA236 monitors the voltage across an external sense resistor and reports current, bus voltage, and power values.