INA190 - Texas Instruments

INA190 Precision Current-Sense Amplifier

The INA190 is a low-power, voltage-output, currentshunt monitor (also called a current-sense amplifier). This device is commonly used for overcurrent protection, precision current measurement for system optimization, or in closed-loop feedback circuits. The INA190 can sense drops across shunts at commonmode voltages from –0.2 V to +40 V, independent of the s.

Features

•1 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 shutdown current: 100 nA (max)
  – Low quiescent current: 50 μA at 25°C (typ)
• Accuracy:
  – Common-mode rejection ratio: 132 dB (min)
  – Gain error: ±0.2% (A1 device)
  – Gain drift: 7 ppm/°C (max)
  – Offset voltage, VOS: ±15 μV (max)
  – Offset drift: 80 nV/°C (max)
• Wide common-mode voltage:
  –0.2 V to +40 V
• Bidirectional current sensing capability
• Gain options:
  – INA190A1: 25 V/V
  – INA190A2: 50 V/V
  – INA190A3: 100 V/V
  – INA190A4: 200 V/V
  – INA190A5: 500 V/V.