INA168NA/3K

Both INA138 and INA168 are high - side unipolar shunt monitors. Devices of this type feature a wide input common - mode voltage range and low quiescent current, and are packaged in a small SOT - 23 package, making them widely applicable to various applications. The input common - mode and supply voltages are independent of each other. The voltage range of INA138 is from 2.7V to 36V, and that of INA168 is from 2.7V to 60V. With a quiescent current of only 25μA, it allows the power supply to be connected to either side of the current - measuring shunt, while the error is very small. The device can convert a differential input voltage into a current output. This current is converted back to a voltage using an external load resistor, and the gain of this resistor can be set in the range of 1 to over 100. Although this circuit is designed for shunt measurement, it is also well - suited for measurement and level conversion in creative applications. Both INA138 and INA168 are available in an SOT23 - 5 package and are rated for a temperature range of - 40°C to 125°C.

Applications

• Shunt measurement
• Automotive, telecom, computers
• Portable and backup battery systems
• Battery chargers
• Power management
• Mobile phones
• Precision current sources

Key features

• Complete single-supply high-side current sensing circuit
• Wide supply and common-mode range
• INA138: 2.7V to 36V
• INA168: 2.7V to 60V
• Independent supply and input common-mode voltage
• Single-resistor gain setting
• Low quiescent current: 25μA (typical)
• Wide temperature range: -40°C to +125°C
• 5-pin Small Outline Transistor (SOT)-23 package