INA190-Q1 – 40V, BI-DIRECTIONAL, ULTRA-PRECISE CURRENT SENSE AMPLIFIER

The INA190-Q1 is an automotive, low-power, voltage-output, current-shunt monitor (also called a current-sense amplifier). This device is commonly used for monitoring systems directly connected to an automotive 12-V battery. The INA190-Q1 can sense drops across shunts at common-mode voltages from –0.2 V to +40 V, independent of the supply voltage. In addition, the input pins have an absolute maximum voltage of 42 V.

The low input bias current of the device permits the use of larger current-sense resistors, thus providing accurate current measurements in the microamp range. The low offset voltage of the zero-drift architecture extends the dynamic range of the current measurement. This feature allows for smaller sense resistors with lower power loss, while still providing accurate current measurements.

Features

  • AEC-Q100 qualified for automotive applications:
    • Temperature grade 1: –40°C to +125°C, TA
  • Low input bias currents: 500 pA (typ)
    (enables microamp current measurement)
  • Low power:
    • Low supply voltage, VS: 1.7 V to 5.5 V
    • Low quiescent current: 50 µA at 25°C (typ)
  • Accuracy:
    • Gain error: ±0.2% (A1 device)
    • Gain drift: 5 ppm/°C (max)
    • Offset voltage, VOS: ±15 µV (max)
    • Offset drift: 0.13 µV/°C (max)
  • Wide common-mode voltage: –0.2 V to +40 V with survivability up to 42 V
  • Bidirectional current sensing capability
  • Gain options:
    • INA190A1-Q1: 25 V/V
    • INA190A2-Q1: 50 V/V
    • INA190A3-Q1: 100 V/V
    • INA190A4-Q1: 200 V/V
    • INA190A5-Q1: 500 V/V

Read more: INA190-Q1 – 40V, BI-DIRECTIONAL, ULTRA-PRECISE CURRENT SENSE AMPLIFIER

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