INA190 - 40V, bi-directional, low-/high-side, zero-drift, voltage output CSA w/low bias current and enable

The INA190 series of devices are voltage-output, current-shunt monitors (also calledcurrent-sense amplifiers). These devices are commonly used for overcurrent protection, precisioncurrent measurement for system optimization, or in closed-loop feedback circuits. This series ofdevices can sense drops across shunts at common-mode voltages from –0.2 V to +40 V, independent ofthe supply voltage. Five fixed gains are available: 25 V/V, 50 V/V, 100 V/V, 200 V/V, or 500 V/V.The low input bias current of the INA190 permits the use of larger current-sense resistors, thusproviding accurate current measurements in the microamp range. The low offset voltage of thezero-drift architecture extends the dynamic range of the current measurement. This feature allowsfor smaller sense resistors with lower power loss, while still providing accurate currentmeasurements.

These devices operate from a single 1.7-V to 5.5-V power supply, and draw a maximum of 65µA of supply current when enabled; only 0.1 µA when disabled. All versions are specified over theextended operating temperature range of –40°C to +125°C, and offered in a UQFN package.

• Low Supply Voltage, V_VS: 1.7 V to 5.5 V
• Wide Common-Mode Voltage: –0.2 V to +40 V
• Low Shutdown Current: 100 nA (Max)
• Low Input Bias Currents: 500 pA (Typ)
  (Enables Microamp Current Measurement)
• Low Offset Voltage, V_OS: ±15 µV (Max)
• Accuracy:
  • Gain Error: ±0.2% (A1 Devices)
  • Offset Drift: 0.13-µV/°C (Max)
  • Gain Drift: 5-ppm/°C (Max)
• Gain Options:
  • INA190A1: 25 V/V
  • INA190A2: 50 V/V
  • INA190A3: 100 V/V
  • INA190A4: 200 V/V
  • INA190A5: 500 V/V
• Quiescent Current: 50 µA at 25°C (Typ)
• Package: 1.8-mm x 1.4-mm UQFN-10

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