110V, 35A integrated-shunt high-precision current-sense amplifier with enhanced PWM rejection

The INA750x is

a voltage output, current sense amplifier with an integrated shunt resistor of 800µΩ. The

INA750x is designed to monitor bidirectional current over a

common-mode range of –4V to +110V, independent of the supply voltage. Adjustable gain option

assists in optimizing the system dynamic range. The integration of the Kelvin connected

shunt resistor with a zero-drift chopped amplifier provides calibration equivalent

measurement accuracy, ultra-low temperature drift performance of ±40ppm/°C, and an optimized

layout for the sensing resistor.

The INA750x is

designed with enhanced PWM rejection circuitry to suppress disturbances from large (dv/dt)

common-mode transients and enable real-time continuous current measurements in switching

systems. The continuous measurements are critical for inline current measurements in a

motor-drive application, and for solenoid valve control applications

This device operates from a single 2.7V to

5.5V power supply, drawing a maximum of 4.25mA of supply current. All versions are specified

over the extended operating temperature range (–40°C to +125°C), and are available in a

14-pin VQFN

package.