INA253A1IPWR

The INA253 is a voltage-output, current-sensing amplifier with an integrated 2mΩ shunt resistor. The INA253 can monitor bidirectional current over a wide common-mode range from –4V to +80V, independent of the supply voltage. It features three fixed gains: 100mV/A, 200mV/A, and 400mV/A. By integrating a precision resistor and a zero-drift chopper amplifier, it can achieve calibrated equivalent measurement accuracy, ultra-low temperature drift of 15ppm/°C, and an optimized Kelvin layout for the sense resistor. The INA253 incorporates an enhanced PWM rejection circuit to suppress large (dv/dt) signals, enabling real-time continuous current measurement. This measurement is crucial for embedded current measurement in motor drive applications and for solenoid control applications. The device operates from a single 2.7V to 5.5V power supply and consumes a maximum supply current of 3mA. All gain versions have an extended operating temperature range (-40°C to +125°C) and are available in a 20-pin TSSOP package.

Applications

• Solenoid valve control
• Transmission control
• Motor control
• Actuator control
• DC/DC converter
• Remote I/O link control

Key features

• Precision integrated shunt resistor
• Shunt resistance: 2mΩ
• Shunt inductance: 3nH
• Shunt resistor tolerance: 0.1% (maximum)
• ±15A continuous current (-40°C to +85°C)
• Temperature coefficient 0°C to 125°C: 10ppm/°C
• High bandwidth: 350kHz
• Enhanced PWM rejection
• Excellent CMRR: DC CMRR >120dB, AC CMRR 90dB (at 50kHz)
• Gain error: 0.4% (maximum), gain drift: 45ppm/°C (maximum)
• Offset current: ±15mA (maximum), temperature drift: 125μA/°C (maximum)
• Wide common-mode range: -4V to +80V
• Available gains: 100mV/A, 200mV/A, and 400mV/A
• Quiescent current: 2.4mA (maximum)