INA253A2QPWRQ1

The INA253-Q1 is an automotive-grade voltage-output, current-sensing amplifier with an integrated 2mΩ shunt resistor. It can monitor bidirectional current within a wide common-mode range from –4V to +80V independently of the power supply voltage. There are three fixed gains available: 100mV/A, 200mV/A, and 400mV/A. By integrating a precision resistor and a zero-drift chopper amplifier, it can provide calibrated equivalent measurement accuracy for the sense resistor, ultra-low temperature drift performance of 15ppm/°C, and an optimized Kelvin layout. The INA253-Q1 uses an enhanced PWM rejection circuit to suppress large (dv/dt) signals, enabling real-time continuous current measurement. This measurement is crucial for in-line current measurement in motor drive applications and solenoid control applications. The device operates from a single power supply of 2.7V to 5.5V and consumes a maximum supply current of 3mA. All gain versions are rated for an operating temperature range of -40°C to +125°C and are available in a 20-pin TSSOP package.

Applications

• Diesel engine
• Gasoline engine
• Valve or motor actuator
• Automatic transmission
• Manual transmission
• Powertrain current sensor

Key features

• AEC-Q100 qualified for automotive applications: Temperature Grade 1: -40°C to +125°C, TA
• Functional safety capable
• Precision integrated shunt resistor: Shunt resistor 2mΩ; Shunt inductance 3nH; Shunt resistor tolerance 0.1% (maximum); ±15A continuous current over -40°C to +85°C; Temperature coefficient 10ppm/°C from 0°C to 125°C
• High bandwidth: 350kHz
• Enhanced PWM rejection
• Excellent CMRR: DC CMRR greater than 120dB; 90dB AC CMRR (at 50kHz)
• Accuracy: Gain error 0.4% (maximum); Gain drift 45ppm/°C (maximum); Offset voltage: 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)