8.2.1.3 Application Curve

Figure 8-7 shows the output of the device when disabled and enabled while measuring a 40-µA load current.

When disabled, the current draw from the device supply and inputs is less than 106 nA.

Time (250 Ps/div)

0 V

D030

Enable

Output

Figure 8-7. Output Disable and Enable Response

9 Power Supply Recommendations

The input circuitry of the INAx191 accurately measures beyond the power-supply voltage, VS. For example, VS

can be 5 V, whereas the bus supply voltage at IN+ and IN– can be as high as 40 V. However, the output voltage

range of the OUT pin is limited by the voltage on the VS pin. The INAx191 also withstands the full differential

input signal range up to 40 V at the IN+ and IN– input pins, regardless of whether or not the device has power

applied at the VS pin. There is no sequencing requirement for VS and VIN+ or VIN–.

INA191, INA2191

SLYS020C – FEBRUARY 2019 – REVISED AUGUST 2021

www.ti.com

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