7.4.5 Shutdown

Specific package options of the INA190-EP 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-EP goes to a high-impedance state when disabled. Therefore, you can connect

multiple outputs of the INA190-EP together to a single ADC or measurement device (see Figure 7-5).

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

supply voltage.

ADC

LOAD

Microcontroller

Bus Voltage1

upto to +40 V

ENABLE

VS

OUT

REF

GND

IN+

IN–

LOAD

0.1 F

Supply Voltage

1.7 V to 5.5 V

Bus Voltage2

upto to +40 V

GPIO1

GPIO2

ENABLE

VS

OUT

REF

GND

IN+

IN–

0.1 F

Supply Voltage

1.7 V to 5.5 V

INA190-EP

INA190-EP

Figure 7-5. Multiplexing Multiple Devices With the ENABLE Pin

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INA190-EP

SBOSA74 – MAY 2022

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Product Folder Links: INA190-EP