INA253 - 80V, Low-/High-Side, Bi-Directional, CSA w/PWM Rejection & Precision Integrated Shunt Resistor

The INA253 is a voltage-output, current sense amplifier with an integrated shunt resistorof 2 mΩ. The INA253 is designed to monitor bi-directional currents over a wide command mode rangefrom
–4 V to 80 V, independent of the supply voltage. Three fixed gains are available: 100 mV/A,200 mV/A, and 400 mV/A. The integration of the precision resistor with a zero-drift choppedamplifier provides calibration equivalent measurement accuracy, ultra-low temperature driftperformance of 15 ppm/°C, and an optimized Kelvin layout for the sensing resistor.

The INA253 is designed with enhanced PWM rejection circuitry to suppress large (dv/dt)signals to enable real time continuous current measurements. The measurements are critical forin-line current measurements in a motor drive application and for Solenoid valve controlapplications.

This device operates from a single 2.7-V to 5.5-V power supply, drawing a maximum of 3 mAof supply current. All gain versions are specified over the extended operating temperature range(–40°C to 125°C) and are available in an 20-pin TSSOP package.

• Precision Integrated Shunt Resistor
  • Shunt Resistor: 2 mΩ
  • Shunt Inductance: 3 nH
  • Shunt Resistor Tolerance: 0.1% (Max)
  • ±15 A Continuous from – 40°C to 85°C
  • 0°C to 125°C Temperature Coefficient:
    10 ppm/°C
• Higher –3 dB Bandwidth of 380 Khz
• Enhanced PWM rejection
• Excellent CMRR
  • >120-dB DC CMRR
  • 90-dB AC CMRR at 50 kHz
• Accuracy:
  • Gain:
    • Gain Error: 0.75% (Max)
    • Gain Drift: 45 ppm/°C (Max)
  • Offset:
    • Offset Current: ±12.5 mA (Max)
    • Offset Drift: 125 µA/°C (Max)
• Wide Common-Mode Range: –4 V to 80 V
• Available Gains: 100 mV/A, 200 mV/A,
  and 400 mV/A
• Quiescent Current: 3 mA (Max)

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