Specific package options of the INA190-Q1 feature an active-high ENABLE pin that shuts down the device when pulled to ground. When the device is shut down, the quiescent current is reduced to 10 nA (typical), and the output goes to a high-impedance state. In a battery-powered application, the low quiescent current extends the battery lifetime when the current measurement is not needed. When the ENABLE pin is driven to the supply voltage, the device turns back on. The typical output settling time when enabled is 130 µs.

The output of the INA190-Q1 goes to a high-impedance state when disabled. Therefore, you can connect multiple outputs of the INA190-Q1 together to a single ADC or measurement device (see Figure 7-5).

When connected in this way, enable only one INA190-Q1 at a time, and make sure all devices have the same supply voltage.

Figure 7-5 Multiplexing Multiple Devices With the ENABLE Pin