INA138

36V、高侧、电流输出电流分流监控器

The and INA168 are high-side, unipolar, current shunt monitors. Wide input common-mode voltage range, low quiescent current, and tiny SOT-23 packaging enable use in a variety of applications.

Input common-mode and power-supply voltages are independent and can range from 2.7 V to 36 V for the INA138 and 2.7 V to 60 V for the INA168. Quiescent current is only 25 µA, which permits connecting the power supply to either side of the current measurement shunt with minimal error.

The device converts a differential input voltage to a current output. This current is converted back to a voltage with an external load resistor that sets any gain from 1 to over 100. Although designed for current shunt measurement, the circuit invites creative applications in measurement and level shifting.

Both the INA138 and INA168 are available in SOT23-5 and are specified for the –40°C to 125°C temperature range.

For all available packages, see the orderable addendum at the end of the datasheet.

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Complete Unipolar High-Side Current Measurement Circuit

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Wide Supply and Common-Mode Range

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INA138: 2.7 V to 36 V

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INA168: 2.7 V to 60 V

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Independent Supply and Input Common-Mode Voltages

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Single Resistor Gain Set

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Low Quiescent Current 25 µA Typical

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Wide Temperature Range: –40°C to +125°C

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5-Pin SOT-23 Package