For this design example, a value of 40.2 mΩ is selected because, while the 40.2 mΩ is less than the maximum

value calculated, 40.2 mΩ is still large enough to give an adequate signal at the current-sense amplifier output.

To reduce resistor power losses or to operate over a reduced output range, smaller value resistors can be used

as the expense of dynamic range and low current accuracy.

9.2.3 Application Curve

Figure 9-2 shows the output response of the device to a sinusoidal current.

Time (25µs/div)

INA183A2 VOUT (1 V/div)

VSENSE (20 mV/div)

Figure 9-2. INA183 Output Response

INA183

SBOSA08 – FEBRUARY 2021

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