Current sense amplifier for cost-sensitive space-constrained applications

11-06-2019 | Texas Instruments | Power

Texas Instruments INA185 Current Sense Amplifier is intended for use in cost-sensitive, space-constrained applications. This device is a bidirectional, current-sense amplifier. The device senses voltage drop over a current-sense resistor at common-mode voltages from –0.2V to +26V, independent of the supply voltage. The device combines a matched resistor gain network in four, fixed-gain device options: 20V/V, 50V/V, 100V/V, or 200V/V. This matched gain resistor network minimises gain error and reduces the temperature drift.


The device runs from a single 2.7V to 5.5V power supply. The device draws a maximum supply current of 260µA and highlights a high slew rate. The device also has a high bandwidth, which makes this device an outstanding option for many power-supply and motor-control applications including battery monitoring, power management, lighting control, overcurrent detection, and solar inverters.

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