1 Features
• Precision integrated 400-μΩ shunt resistor
– Continuous ±75 A at 25°C
– Continuous ±50 A from –40°C to +85°C
– Shunt resistor tolerance: 0.5% (maximum)
– Low drift: 10 ppm/°C (0°C to 125°C)
– Low inductance: 2 nH
• High accuracy
– System gain error: 0.5% (maximum)
– System gain drift: 45 ppm/°C (maximum)
– Input offset current: ±62.5 mA (maximum)
– Input offset drift: 625 μA/°C (maximum)
– DC CMRR > 120-dB
– 90-dB AC CMRR at 50 kHz
• Enhanced PWM rejection
• Wide common-mode range: –4 V to +80 V
• Available gains: 20 mV/A, 40 mV/A,
and 75 mV/A

2 Applications
• 48-V motor controls
• DC/DC converters
• Medical cordless tools
• Solenoid and actuators
• Remote I/O link control

3 Description
The INA254 is a voltage-output, current sense
amplifier with a 400-μΩ integrated shunt resistor. The
INA254 is designed to monitor bidirectional currents
over a wide common-mode range from –4 V to +80 V,
independent of the supply voltage. Three fixed gains
are available: 20 mV/A, 40 mV/A, and 75 mV/A.
The integration of the precision resistor with a zerodrift
chopped amplifier provides calibration equivalent
measurement accuracy, ultra-low temperature drift
performance of ±45 ppm/°C (maximum), and an
optimized Kelvin layout for the sensing resistor.
The INA254 is designed with enhanced PWM
rejection circuitry to suppress large (dv/dt) signals that
enable real-time continuous current measurements.
The measurements are critical for in-line current
measurements in a motor-drive application, and for
solenoid valve control applications.
This device operates from a single 2.7-V to 5.5-V
power supply, drawing a maximum of 2.4 mA of
supply current. All gain versions are specified over
the extended operating temperature range (–40°C
to +125°C), and are available in a 24-pin HTSSOP
package.