INA225 Current-Shunt Monitor

Product Highlights > INA225 Current-Shunt Monitor

            INA225 Current-Shunt Monitor
                    36 V, programmable-gain, voltage-output, bidirectional zero-drift series monitor from TI
    

Image of Texas Instruments' INA225 Current-Shunt Monitor Texas Instruments' INA225 is a voltage-output, current-sense amplifier that senses drops across current-sensing resistors at common-mode voltages that can vary from 0 to 36 V, independent of the supply voltage. The device is a bidirectional, current-shunt monitor that allows an external reference to be used to measure current flowing in both directions across a current-sensing resistor.

Four discrete gain levels are selectable using the two gain-select terminals (GS0 and GS1) to program gains of 25 V/V, 50 V/V, 100 V/V, and 200 V/V. The low-offset, zero-drift architecture and precision gain values enable current-sensing with maximum drops across the shunt as low as 10 mV of full-scale, while maintaining very high accuracy measurements over the entire operating temperature range.

The device operates from a single +2.7 V to +36 V power supply, drawing a maximum of 350 µA of supply current. The device is specified over the extended operating temperature range (–40°C to +125°C), and is offered in an MSOP-8 package.

Features
Wide common-mode range: 0 V to 36 V Offset voltage: ±150 µV (Max, all gains) Offset voltage drift: 0.5 µV/°C (Max) Gain accuracy, over temperature (Max): 25 V/V, 50 V/V: ±0.15% 100 V/V: ±0.2% 200 V/V: ±0.3% 10 ppm/°C gain drift	250 kHz bandwidth (gain = 25 V/V) Programmable gains: G1 = 25 V/V G2 = 50 V/V G3 = 100 V/V G4 = 200 V/V Quiescent current: 350 µA (Max)
Applications
Power supplies Motor control Computers	Telecom equipment Power management Test and measurement